Omega Calculator DPF75 User Manual

Users Guide  
Shop online at  
DPF75, DPF76  
AND DPF78 SERIES  
Rate/Totalizer  
M1090 /071603  
 
TABLE OF CONTENTS  
QUICK SET-UP GUIDE ..................................................................................................... ii  
SPECIFICATIONS .............................................................................................................1  
HOW TO MOUNT THE UNIT.............................................................................................2  
WIRING ..............................................................................................................................3  
UP/DOWN CONTROL AND QUADRATURE INPUTS ......................................................3  
CONNECTING AC/DC POWER ........................................................................................4  
WIRING CONSIDERATIONS ............................................................................................4  
TYPICAL SENSOR HOOKUP ...........................................................................................4  
TYPICAL QUADRATURE HOOKUP .................................................................................4  
WHAT CAN YOU VIEW .....................................................................................................5  
OUTPUT JUMPER SELECTIONS .....................................................................................5  
MILLIVOLT INPUT OPTION JUMPER SELECTIONS.......................................................5  
OPERATING FRONT PANEL ............................................................................................6  
PROGRAMMING FLOW CHART ......................................................................................6  
PROGRAM CODES & DESCRIPTIONS ...........................................................................7  
TERMINATIONS ................................................................................................................8  
CALCULATING SCALE FACTORS ...................................................................................9  
PROGRAMMING PROCEDURE .....................................................................................10  
SETTING SCALING FACTORS.......................................................................................10  
SETTING THE COUNTER...............................................................................................11  
SETTING THE RATE .......................................................................................................12  
SETTING THE LOCK CODE & LOCKING THE UNIT .....................................................13  
SETTING THE RELAYS & PRESETS .............................................................................14  
OUTPUT WIRING ............................................................................................................15  
ANALOG OUTPUT OPTION............................................................................................16  
RS232/RS422 SERIAL COMMUNICATIONS ..................................................................17  
RS232/RS422 WIRING ....................................................................................................19  
TROUBLESHOOTING GUIDE.........................................................................................20  
UNPACKING  
Remove the Packing List and verify that you have received all equipment. If you have any  
questions about the shipment, please call OMEGA Customer Service Department at  
1-800-622-2378 or (203) 359-1660.  
When you receive the shipment, inspect the container and equipment for any signs of damage.  
Note any evidence of rough handling in transit. Immediately report any damage to the shipping  
agent.  
NOTE  
The carrier will not honor any claims unless all shipping material is saved  
for their examination. After examining and removing contents, save  
packing material and carton in the event reshipment is necessary.  
i
 
QUICK SET-UP GUIDE  
1)  
2)  
Determine what function the panel meter is to perform, e.g., rate display with alarm, batch  
control, totalizer, etc.  
Ensure compatibility with sensor. The DPF70 panel meters require a pulse (or contact  
closure) input. The pulse must exceed 3 VDC and drop below 1 VDC. If necessary, as in the  
case of paddle wheel, turbine meter or other types of inductive pick-up sensors, a signal  
conditioner or pulse amplifier (such as FLSC-AMP) can be used.  
3)  
The wiring is explained on pages 3 and 4. The 12 VDC output can be used to power the  
FLSC-AMP. For the DPF75, a single input at pin 5 can be jumpered to pin 6: input B will be  
the grand total.  
4)  
5)  
The relay function can be altered by cutting and/or soldering jumper traces as shown on  
page 5.  
There are two main operating modes: RUN, PROGRAM. (See page 6 for a summary). In the  
RUN mode, the view key allows you to toggle the display for rate, batch and grand total. The  
PRE A, PRE B keys allow you to see and set the relay trigger points. The lock key allows you  
to lock and unlock the keypad functions by entering the lock-out code.  
The PROGRAM mode must be accessed to set up the function of the display. In this mode,  
the RST key enters the displayed value into memory. The PRGM key toggles the selections  
and the arrow keys bump that digit up to the next value or change the decimal point location.  
PROGRAMMING EXAMPLE  
For this example, let's assume you have an FP-5300 paddle wheel sensor, an FP-5310 1" fitting, the  
FLSC-AMP pulse amplifier and DPF75. You want to see flow rate (GPM) batch and grand total. The  
signal K-factor is 183.66 pulses/gallon, (from the manual for the FP-5300 flow sensor). Here are the  
programming steps you will see, starting on page 1.  
FACTOR STEP 1: DPF75, DPF76, & DPF78  
A,)  
B.)  
C.)  
D,)  
Set the decimal point for "dPFA" to allow two decimal places using the UP arrow key.  
Enter the K-factor next: 183.66, using the arrow keys.  
Do the same for "dPFB" (DPF75 only).  
Choose "HI CPS", as the input will exceed 40 Hz (DPF78 only).  
ii  
 
COUNTER STEP 2: DPF75, DPF76:  
A,)  
B.)  
C.)  
Reset to zero "rST 0" will allow us to count up. "SET Pr" counts down from the preset value.  
To read the total in whole gallons, set the decimal point to the far right.  
Since you do not want to sum or take the difference of two inputs, choose "A SEP B" (DPF75  
only).  
D.)  
The frequency will exceed 40 Hz, so you will need to select "HI CPS". "LO CPS" provides  
debounce filtering for contact closures.  
RATE STEP 3: DPF75, DPF78  
A.)  
B.)  
C.)  
D.)  
E.)  
Select "SCALE" to engage the K-factor.  
Select "=60".  
Normalize at 1.5 seconds.  
Set 4 significant figures.  
Set 02 sec delay.  
LOCK STEP 4: DPF75, DPF76 & DPF78  
Before you finish this step, write down your personal lock-out code and store it in a safe place. Here  
is where you select and enter the code and what will be locked. To lock the meter you must wait until  
you are in the RUN mode. Press the "LOCK" key, use the arrows to display your code, then Enter.  
Repeat to unlock.  
RELAYS STEP 5: DPF75  
The DPF76 relays can only trigger on batch or total. The DPF78 relays can only trigger on rate. The  
DPF75 relays can be programmed to trigger on rate or total. The relay setpoints for rate or total for  
all versions with relays are set with the PRE A and PRE B buttons. When the relays are set for non-  
latching, the batch total will automatically reset at the batch preset. The programming is now com-  
plete. Here is what you will see with 100 Hz input frequency (equal to 32.66 GPM flow rate). The  
rate is: "r 32.66". The batch will continuously increase: ("480"); the grand total will also continuously  
increase ("...4.8.0"). Notice that the decimals points for the grand total are inverted - all are lit except  
where the decimal point is actually located.  
To read total gallons to a tenth of a gallon: in Step 2, change the dPLoC to allow one decimal place  
"XXX.X" for the counter. But this will cause a shift in the rate display so you will also need to shift the  
K-factor in Step 1. Change the K-factor to 18.366 to read the correct units. Now the 100 Hz signal  
will yield "r 32.66", "480.0", ". . 4.8.00.".  
iii  
 
DESCRIPTION & SPECIFICATIONS  
DESCRIPTION:  
Analog Output:  
The OMEGA DPF70 is a dual input (channel A and B) counter/  
ratemeter, each with its own 5 digit dividing scale factor. The two 5  
AMP preset relay outputs can be programmed by the user to apply  
to the "A" total counter, the "A" ratemeter, or the "B" counter or the  
net total of A and B inputs. The user can view the Net Total of  
"A+B", the Net Total of "A-B", the rate of A, or A and B counters  
separately. The "DPF75" version shows rate and total (as de-  
scribed above). The "DPF76" is exclusively a counter and the  
"DPF78" is exclusively a ratemeter.  
SPECIFICATIONS:  
An optional 4-20mA (0-20mA) output is available for  
the DPF70 series. The output can be programmed  
to track rate or total. This feature is available by  
adding suffix A to the part number. Connections are  
via a 2 terminal pluggable screw connector.  
Programming is accomplished by using the front panel  
in conjunction with rear dip switches.  
Accuracy: 50uA worst case.  
Compliance Voltage: 3 to 30 VDC non inductive.  
RS232/RS422SERIAL INTERFACE  
DISPLAY  
6 digit, 0.55" High LED  
INPUT POWER:  
110 VAC ± 15% or 11 to 15 VDC  
220 VAC ± 15% or 11 to 15 VDC  
CURRENT:  
250 mA DC max. or 6.5 VA AC  
OUTPUT POWER (AC powered units only)  
+12 VDC @ 50 mA, unregulated -10 + 50%  
TEMPERATURE:  
Operating: +32°F (0°C) to +130 F (+54°C)  
Storage: -40 F (-40°C) to +200°F (93°C)  
DIMENSIONS: See next page.  
If the serial interface option is supplied, up to 99 units can be linked  
together. (The terminal addressing the unit must be capable of  
driving all loads in the loop.) Unit status and new set points can be  
communicated by serial communication. Mode changes, however,  
must always be made on the front panel. Data is transmitted at  
selected baud rates using standard seven bit ASCII characters and  
parity with two additional bits of “Start” and “Stop” to make up the  
standard ten bit character.  
Data is received and transmitted over standard EIA RS232 or  
RS422 levels. Each 10 bit character is made up of a start bit, 7 bit  
ASCII code, parity bit and stop bit. Unit number, baud rate and  
parity are entered in the “Program Setting” set up mode and remain  
in memory even if power is off.  
WEIGHT:  
2 Lbs. (1 kg)  
MEMORY  
EEPROM stores data for 10 years if power is lost.  
INPUTS:  
Note that the input impedance of RS232 is 3K or 7K Ohm worst  
case. The terminal addressing the unit must be capable of driving  
all loads in the loop. RS422 input impedance is much higher and  
there is usually no problem driving 25 units. Unit serial transmit line  
remains in a high impedance “OFF” state until addressed.  
3:  
High Impedance DC pulse input Open or 0-1 VDC  
(low), 4-30 VDC (high), 10 KOhm imp. 10 KHz max.  
speed. Accepts simultaneous inputs.  
PRESETS  
Two control outputs are provided. To set relay values, press “menu”  
3M: Mag. Input, Input A only, accepts 30mV input (50 V max. P/P) button until “Relay” appears on the display, the A and B outputs  
signals 10 KOhm imp. 5 KHz max. (Input B, 4-30V) can be assigned to the ratemeter (high/low), one preset for rate  
3MB: Mag. Input, Inputs A & B, accepts 30mV input (50 V max. P/P) and one for total, or two presets (2 stage shut off) on the A and B  
signals 10 KOhm imp. 5 KHz max.  
4-30 V Count pulses on Input A, 4-30 V Direction  
Control input (level) on Input B.  
counters. A 5 digit value can be entered for both presets and the  
decimal point location is the same as the counter. The outputs can  
be set to energize from 0.1 to 99.9 seconds or latch (0.0). If a value  
other than 0.0 is entered, the counters will auto reset at the preset .  
In the A-B or A+B versions, the relays will be assigned to either net  
total or A rate.  
5:  
5M: 30 mV Count pulses on Input A (50 V max. P/P)  
4-30 V Direction Control input (level) on Input B  
9:  
Quadrature, accepts 4-30 V pulses with 90°phase  
shift for direction detection.  
LOCKOUT  
9MB: Quadrature, accepts 30 mV (50 V max. P/P) pulses with  
90°phase shift for direction detection.  
NOTE: The Mag. inputs have filtering as follows: up to 300hz  
Unauthorized front panel changes can be prevented by entering a  
user selected 5 digit code, in the “LOC” , . mode. The front panel  
can be completely locked out or the presets can remain accessible.  
RATEMETER  
@30mV, 5KHz @ .25V to 50V max.  
RESET:  
Front Panel:  
Resets displayed value and control output  
Remote:  
4-30 VDC negative edge resets COUNTER "A" and control  
output  
K FACTOR/SCALING  
Accurate to 4 1/2 digits (±1 display digit). The rate meter can be  
programmed to accept almost any number of pulses per unit of  
measurement, sample from 2 to 24 seconds maximum, and auto-  
range up to 5 digits of significant information. In the “RPS” mode,  
the ratemeter displays in units per second, and in the “scale” mode,  
units per hour or per minute. The unit will display the rate of the A  
Input only.  
In the standard unit a fixed K-Factor is used to convert the input COUNTER  
pulses to engineering units. The 5 digit K-Factor dividers, with The two 6-digit counters can count at 10Khz speed. Each can  
decimal keyed into any position, allow easy direct entry of any K- have a 5-digit dividing scale factor. The counter advances on the  
Factor from 0.0001 to 99999. Separate factors may be entered for positive edge of each pulse. Count up or down modes available, as  
the 2 separate input channels.  
CONTROL OUTPUTS:  
Relays:  
are quadrature inputs from encoders for position or length mea-  
surement. The unit can be programmed to view the net value of  
"A+B" or "A-B", or A and B as separate counters.  
2 each N.O. Relay; 5 Amps120/240 VAC or 28 VDC.  
(N.C. relay contacts and NPN transistor output  
available with solder jumpers. Transistor output is  
internally pulled up to 10 VDC through relay coil, sinks  
from 10 VDC to .5 V @ 100 mA)  
1
 
HOW TO MOUNT THE UNIT  
The unit is designed to be mounted with a gasket providing a water tight seal. Two mounting brackets are provided to  
secure the unit to the panel. A panel less than .1" may distort if the clamps are screwed too tightly.  
Slide the body of the unit through the rubber gasket. Insert the unit into the panel. As shown in "FIG. A", slide the brackets  
up the groove to press against the back of the panel. Insert screws into rear of brackets and tighten them evenly and  
alternately. Do not over tighten! A normal level of torque is required. Maximum torque should be 3" pounds.  
This product is designed to be panel mounted and is NEMA 4 rated if proper mounting procedures are followed and the  
required and supplied hardware is correctly used.  
If the panel in which the unit is mounted is less than .125 of an inch thick, the possibility exists that there will be some  
flexing. Should this flexing occur, the resulting deformation of the panel could cause a loss of the water tight seal. In case  
this should occur, the use of silicone or other sealant would be recommended.  
This product is designed to the NEMA 4 rated. However, the fact that we are unable to control either the location in which  
the device is installed or the actual installation itself requires that the company's liability shall extend only to the repair or  
replacement of a defective product.  
We are prepared to offer additional assistance in those special situations where normal mounting methods do not seem to  
satisfy the customers needs. This assistance may be obtained by calling the factory and asking for Application Engineer-  
ing.  
FIG. A  
DIMENSIONS  
3.925  
(99.7)  
4.245  
(107.8)  
0.587  
(14.91)  
4.437  
(112.7)  
3.622  
(92)  
2.625  
(66.68)  
1.772  
(45)  
CUSTOMER PANEL  
Panel Thickness 0.062" (1.5)  
to 0.187" (4.7) max.  
BEZEL  
GASKET  
Dimensions in inches (mm)  
2
 
WIRING  
The rear terminal contains 12 screw terminals for connecting #14 to #28 gauge wire.  
The unit is controlled by a microprocessor and, therefore, an electrically "noisy" environment could cause operating  
problems. The input power line should not be common to power lines for motors, pumps, contactors, etc.  
The unit is designed to be immune from line or RF voltage interference. In some environments voltage spikes of over 100  
volts, even 1000 volts, can occur. When common to a power line driving motors voltage fluctuations can be extreme and  
rapid. Lines driving DC or AC solenoids, relays, or actuators can also cause problems.  
Four sources of noise can occur:  
1) AC power line noise - If the unit cannot be connected to a clean power source, an inductive load suppressing device  
(MOV as GE # V130LA1 or Resistor Capacitor as Paktron # .2 uf/220 ohm @ 400V) can be installed. Although locating  
the suppressor across the AC supply at the unit should help, best results are obtained by connecting the suppressor  
across the leads of the "load" at the device causing the spike.  
2) Input line noise -The noise is carried on the input and D.C. ground lines. Make sure the input wires are never run into  
the unit in a bundle with power input lines. Also, keep these input lines isolated from inductive lines from devices  
drawing heavy loads. If there is a possibility of electrical noise, we recommend using shielded cable, with the shield  
being hooked to the D.C. ground terminal on the instrument, and to "earth" at one point in the circuit, preferably at the  
D.C. ground terminal of the unit.  
3) Output lines - The unit has two relay outputs. When these outputs are used to run external relays or solenoids, spikes  
can be generated upon activation. This noise can spread through the instrument causing operating problems. If the  
source is a D.C. operated device, a general purpose diode (IN4004) placed across the solenoid prevents electrical  
noise spikes. Connect the cathode (banded side) to the more positive side of the coil. If the source is an A.C. operated  
device, use a MOV or Resistor Capacitor across the coil.  
4) 12 VDC output supply - Noise can be generated on the 12 VDC output supply if it is used to drive inductive loads or if  
the current draw exceeds 50 mA. Insure that all inductive loads have a diode (such as IN4004) across the coil and that  
the current does not exceed 50 mA.  
UP/DOWN CONTROL AND QUADRATURE INPUTS  
QUADRATURE INPUT:  
When programming the counter section for quadrature input, you must set the unit for A net B and A sub B (see step 2 in  
programming section). This insures proper operation. The rate can only be viewed in one direction. If the unit is a  
ratemeter only (DPF78), connect only one of the quadrature channels to Input A (pin 5).  
UP/DOWN CONTROL:  
When using the up/down control option, Input A (pin 5) is the count input and Input B (pin 6) is the up/down control  
(direction) input. The counter must be set for A net B and A sub B (see step 2 in programming section).  
When the direction input is high (4-30VDC) the count inputs will count up, when the direction input is low (open or less than  
1VDC) the count inputs will count down. The direction input must precede the count input by 1 msec when the unit is set for  
low CPS and 1 usec when set for high CPS.  
3
 
CONNECTING AC / DC POWER  
NOTE: Connect power only after other connections are finished. Do not touch the live AC power terminals! The unit has  
been designed with an isolated AC input. Thus, polarity is not a concern for the AC input. The chassis is plastic, therefore  
earth ground is not used. For D.C. operation, connect + 12V to pin 7 and - D.C. to pin 8.  
WIRING CONSIDERATIONS  
Connecting the DPF70 Series to Omega Flowmeters and Amplifiers:  
FTB4605 & FTB4607 Water Meters:  
DO NOT USE PIN 7 WITH THESE METERS!  
1 COMMON  
2 N.O.(N.C./NPN)  
3 COMMON  
4 N.O.(N.C./NPN)  
5 A INPUT  
13- V+  
14- I SINK  
Connections:  
Customer supplied 1/4 Watt 2000  
(approximateley) resistor  
6 B INPUT  
Green  
7 11 to 19V @ 50mA OUT/+DC IN  
White  
Brown  
8 -DC (GROUND)  
9 RESET INPUT  
10 6 to 14V @ 50mA  
11 A.C. INPUT  
OFF  
ON  
RUN  
CAL.  
4-20mA 0-20mA  
RATE COUNT  
RUN  
SET  
12 A.C. INPUT  
FTB4605 & FTB4607  
Water Meters  
FTB600 Series Flow Meters:  
DO NOT USE PIN 7 WITH THESE METERS!  
1 COMMON  
2 N.O.(N.C./NPN)  
3 COMMON  
4 N.O.(N.C./NPN)  
5 A INPUT  
13- V+  
14- I SINK  
Connections:  
6 B INPUT  
Brown  
7 11 to 19V @ 50mA OUT/+DC IN  
Green  
White  
8 -DC (GROUND)  
9 RESET INPUT  
10 6 to 14V @ 50mA  
11 A.C. INPUT  
OFF  
ON  
RUN  
CAL.  
4-20mA 0-20mA  
RATE COUNT  
RUN  
SET  
12 A.C. INPUT  
FTB600  
Flow Meters  
FLSC-AMP Amplifier:  
1 COMMON  
2 N.O.(N.C./NPN)  
3 COMMON  
4 N.O.(N.C./NPN)  
5 A INPUT  
13- V+  
Connections:  
14- I SINK  
1
2
3
3
2
1
6 B INPUT  
7 11 to 19V @ 50mA OUT/+DC IN  
TB1 TB2  
FLSC-  
8 -DC (GROUND)  
9 RESET INPUT  
10 6 to 14V @ 50mA  
11 A.C. INPUT  
OFF  
RUN  
ON  
CAL.  
4-20mA 0-20mA  
RATE COUNT  
AMP  
FLSC-AMP  
Amplifier  
RUN  
SET  
Flowmeter  
(Turbine-Mag Pickup)  
12 A.C. INPUT  
4
 
WHAT CAN YOU VIEW?  
1) "A sub B" - If you have selected the "A sub B" mode, pressing "view" shows:  
A) The net result of subtracting input B from input A. Pulses on input B will subtract (count down). Pulses on input A  
will add (count up) if "reset to 0" is selected, if "set to preset" is selected, input A will subtract (count down).  
B) The rate of input A.  
2) "A add B" - If you have selected "A add B" mode, pressing "view" shows:  
A) The net result of adding "A" and "B" inputs. Pulses on input B will add (count up). Pulses on input A will add  
(count up) if "reset to 0" is selected, if "set to preset" is selected input A will subtract (count down).  
B) The rate of input A.  
3) "A sep B" - If you have selected " A sep B" mode, pressing "view" shows:  
A) The total counts of input A. If "reset to 0" is selected A counts up, if "set to preset" is selected A will count down.  
B) The rate of input A.  
C)* The total counts of input B. B will always count up.  
NOTE: In "A sep B" mode, B can be used in 3 ways:  
1) As a separate totalizing counter  
2)**As a Batch Total Counter for input A  
3)**As a Grand Total Counter for input A  
NOTE:  
* All decimal points are inverted when "B total" is being displayed.  
** See below on how to modify for Batch Count and "B" as a Grand Total Counter.  
OUTPUT JUMPER SELECTIONS  
MILLIVOLT INPUT OPTION  
JUMPER SELECTIONS  
FUNCTION  
MODIFICATION  
J3  
"A" RELAY  
N.C. OUTPUT  
CUT  
AT "A"  
JUMPER  
"B" TO "2"  
U1  
C7  
J6  
J5  
U2  
C5  
U4  
J2  
J1  
"B" RELAY  
N.C. OUTPUT  
CUT  
AT "D"  
JUMPER  
"E" TO "4"  
J4  
C1  
C9  
R2  
C3  
C2  
R1  
C4  
CR2  
CR4  
"A" PRESET  
CUT  
JUMPER  
*
*
TRANSISTOR (NPN) AT "A"  
"C" TO "2"  
R3  
B
REV  
P1  
CR5  
"B" PRESET  
TRANSISTOR (NPN) AT "D"  
CUT  
JUMPER  
"F" TO "4"  
R6  
R10 C6  
CR1  
CR6  
R9  
R8  
"B" AS BATCH  
COUNTER  
SELECT JUMPER  
"A SEP B" "H" TO "G"  
20229  
U3  
CR3  
R4  
R5 R7 C8  
U5  
"B" AS GRAND  
TOTAL COUNTER  
SELECT CONNECT  
"A SEP B" PULSES TO  
"A" & "B"  
If the unit has the millivolt input bd.# 20229, A & B inputs can be  
separately solder jumper programmed to accept either a low milli-  
volt or 4-30 V input. Each unit shipped is programmed according  
to part number. If solder jumpers are made, the part number  
should be modified to reflect the changes made  
BOTTOM VIEW AT TERMINAL  
F
C
C=CLOSE, O=OPEN  
E
D
B
A
L
H
G
4
2
4-30V INPUT  
J1-O, J2-C, J3-O  
J4-O, J5-C, J6-O  
Millivolt INPUT  
J1-C, J2-O, J3-C  
J4-C, J5-O, J6-C  
20192  
Input A  
InputB  
12 11 10 9  
8
7
6
5
4
3
2
1
* The unit must be removed from the case to access jumpers C & F, all  
other jumpers can be accessed by removing the plastic extender.  
NOTE: All three pads at jumpers 2 and 4 are connected.  
5
 
OPERATING THE FRONT PANEL  
RST  
ENTER LOCK PRE A PRE B VIEW PRGM  
E
A
B
C
D
Press to ENTER in Press to "enter"  
Press to view or  
change Preset A  
Press to view or  
change Preset B view A Rate& Net through  
Press to alternately Press to cycle  
the programming  
mode.  
Press to RESET  
displayed total in  
operating mode.  
LOCK code to  
LOCK and  
UNLOCK front  
panel.  
Total or A Rate, A  
Total & B Total.  
PROGRAM  
choices;  
Press to step  
through set up  
choices in pro-  
gram mode.  
Use keys A, B, C, D, & E to advance digits during a numeric entry sequence.  
PROGRAMMING FLOWCHART  
NOTE: Several programming selections will not appear with DPF76 and DPF78 units.  
Press this key to step through menu choices.  
PRGM  
Start Here  
RST  
Press this key to enter displayed value  
ENTER  
PRGM  
FACToR  
CouNT  
RATE  
LoC  
RELAY  
PRGM  
PRGM  
PRGM  
PRGM  
ENTER  
ENTER  
ENTER  
DP F A  
ENTER  
ENTER  
RST  
0
SET  
PR  
A
ToT  
LC  
PRg  
LC  
ALL  
SCALE  
Z3600  
RPS  
PRGM  
PRGM  
PRGM  
PRGM  
ENTER  
ENTER  
ENTER  
ENTER  
A ##.#  
ENTER  
DPLoC  
ENTER  
ENTER  
#####  
Z60  
CoDE  
PRGM  
ENTER  
B
ToT  
#####  
DP F B  
ENTER  
PRGM  
ENTER  
ENTER  
A
NET  
B
A
SEP  
B
ENTER  
ENTER  
NoR ##  
ENTER  
B ##.#  
PRGM  
ENTER  
ENTER  
RUN MODE  
#####  
FiguR#  
ENTER  
ENTER  
RUN MODE  
A
ADD  
B
A
SuB  
B
RUN MODE  
PRGM  
DLY #  
ENTER  
ENTER  
Lo  
CPS  
Hi  
CPS  
RUN MODE  
PRGM  
Lo  
CPS  
Hi  
CPS  
PRGM  
RATE METER  
(DPF78)  
ENTER  
ONLY  
ENTER  
RUN MODE  
RUN MODE  
6
 
PROGRAM CODES AND DESCRIPTIONS  
The following is a list of abbreviations as they appear on the display and front panel of the unit.  
ABBREVIATION  
DESCRIPTION  
SCALING FACTOR - For A and B Inputs. Each input has a separate 5 digit dividing scale factor.  
DECIMAL POINT FOR FACTOR A - Enter location of decimal point for scaling Factor A by pressing the  
button under the digit where the decimal is desired.  
DECIMAL POINT FOR FACTOR B - Enter location of decimal point for scaling Factor B by pressing the  
button under the digit where the decimal is desired.  
PORTION OF MENU FOR SETTING COUNTER VARIABLES  
RESET TO 0 - Counter will reset to 0. Input A will count up from 0. Input B will subtract (count down) in A  
Sub B mode. Input B will add (count up) in A Add B mode.  
SET TO PRESET - Counter will reset to preset A. Input A will count down from preset A. Input B will count  
up (add) in "A add B" mode and input B will count down (subtract) in "A sub B" mode.  
DECIMAL POINT LOCATION - Enter desired location of decimal by pushing the button under the digit where  
the decimal is desired. Changing the decimal will change the decimal location in the A & B counters as well  
as the rate display.  
NET RESULT OF ADDING OR SUBTRACTING A & B INPUTS  
A & B INPUTS ARE SEPARATE - A & B are not added or subtracted.  
A SUBTRACT B - The number of scaled pulses from Input B are subtracted from the number of scaled pulses  
from Input A. (-99999 TO 999999)  
A ADD B - The number of scaled pulses from the A Input are added to the number of scaled pulses from the  
B Input.  
HIGH COUNTS PER SECOND - This sets the unit for high count speeds (0-9.99KHz)  
LOW COUNTS PER SECOND – This sets the unit for contact debounce filtering (0-40Hz)  
PORTION OF MENU FOR SETTING RATE VARIABLES  
RATE PER SECOND - The display will read in rate per second.  
SCALING - Allows unit to display rate per minute or rate per hour.  
DIVIDE K FACTOR BY 60 - This sets the unit for rate per minute; equal to 60 times rate per second.  
DIVIDE K FACTOR BY 3600 - This sets the unit for rate per hour; equal to 3600 times rate per second.  
NORMALIZING FACTOR - Normalizes (averages) the data being received. Higher settings provide more  
normalizing (averaging) for a more stable display. Derived from the equation:  
(Old Data x "NOR" + New Data)  
("NOR" + 1)  
SIGNIFICANT FIGURE - This sets the amount (1-5) of meaningful figures the unit will display. (RATE DIS  
PLAY ONLY). FOR EXAMPLE: If "2" is set as the figure, a rate of 273.45 will be displayed as 270.  
DELAY FACTOR - The amount of time (02 to 24 sec.) the unit will "look" for valid data, before the display  
defaults to zero. (RATE DISPLAY ONLY)  
7
 
LOCK - This portion of the menu allows you to:  
1) lock the program (presets are still accessible)  
2) lock all (presets and program are locked).  
LOCK PROGRAM - This will lock the program and allow the presets to be changed when the unit is in the  
lock mode.  
LOCK ALL - This will lock the program and the presets when the unit is in the locked mode. The presets can  
be viewed, but not changed.  
LOCK CODE - This message (code) will flash on display for approximately 3 seconds. It will be followed by a  
5 digit number (xxxxx). The number you enter here will be the code to lock and unlock the unit.  
RELAY - This portion of the menu allows you to set your relay operation variables.  
RELAY A FOR TOTALIZER - When this is selected relay A will activate when the net total has reached  
Preset A ("A NET B" Mode ). Relay A will activate when the total of input A reaches preset A ("A SEP B"  
Mode).  
RELAY A FOR RATE - When this is selected relay A will activate when the Rate of input A equals or exceeds  
preset A when in "A NET B" or "A SEP B" mode. The relay will drop out when the rate of A falls below preset  
A.  
RELAY A DURATION - This message will appear when "A TOT" is selected. It is the duration which the  
relay will remain energized (00.1 to 99.9 sec). If 00.0 is selected, the relay will latch until reset. When the  
duration is not at 00.0, the unit will autorecycle.  
RELAY B FOR TOTALIZER - When this is selected relay B will activate when the net total has reached preset  
B ("A NET B" Mode). Relay B will activate when the total of input B has reached preset B ("A SEP B" Mode).  
RELAY B FOR RATE - When this is selected relay B will activate when the rate of input A equals or exceeds  
preset B when in "A NET B" or "A SEP B" mode. The relay will drop out when the rate of A falls below preset  
B.  
RELAY B DURATION - Follow same procedure as A ##.#.  
TERMINATIONS  
1- COMMON  
13- V+  
2- N.O.(N.C./NPN)  
3- COMMON  
4- N.O.(N.C./NPN)  
5- INPUT A  
14- I SINK  
Analog Out  
Serial Port  
Setup Switches  
1 2 3 4  
13 14  
ON  
6- INPUT B  
REAR VIEW  
7- 11 - 19 V @ 50mA OUT/+DC IN  
8- -DC (GROUND)  
9- RESET INPUT  
10- 6 - 14 V @ 50mA  
11- A.C. INPUT  
OFF  
ON  
RUN  
CAL.  
1
2
3
4
5
6
7
8
9 10 11 12  
4-20mA 0-20mA  
RATE COUNT  
RUN  
SET  
12- A.C. INPUT  
8
 
CALCULATING SCALE FACTORS  
There are two separate dividing scale factors, one for input "A" and one for input "B". The factor to enter is the number of  
pulses per the desired unit of measurement. The factor ranges from 0.0001 to 99999. The factor is the same for rate and  
count on input "A". Because the "units per second", "minute", or "hour" are field programmable from the keypad, scale  
factor calculations for the ratemeter are easy. Here are some examples:  
SCALING FACTOR EXAMPLES:  
BATCHING:  
You want to count the number of batches (10 boxes each) being loaded onto a pallet.  
Solution - Dial in a scale factor of 10.  
UNIT COUNTING: You pick up a notch on a paper roll (1 pulse per shaft revolution). Each revolution equals 3 feet. To  
find the number of pulses per foot, simply divide "1 pulse" by "3 feet" (1÷ 3 = .3333).  
Solution - One foot equals 0.3333 pulses, enter this as the scale factor and the display will read in feet.  
RATE: The shaft of a motor has a flywheel with 10 spokes. A prox switch is mounted to sense 10 pulses per revolution.  
RPM of the shaft is the desired readout.  
Solution: Enter a Factor of 10 and for every 10 pulses, "1" will appear on the display. Set rate per  
second, minute or hour as desired.  
A conveyor carrying bottles must be controlled for bottle speed. For each revolution of the front roller, three bottles  
travel by. Thus, one revolution equals 3 bottles. A wheel with seven spokes is mounted on the roller. The user  
can't sense bottles because they are traveling through a washer, so a sensor is placed at the roller, sensing seven  
pulses per revolution of the shaft, which equals 3 bottles per revolution.  
To calculate the scale factor (7 ppr ÷ 3 bottles) = 2.3333 scale divider. Set rate per second, minute or hour as  
desired.  
A flow meter is generating 52.6 pulses per gallon. The desired readout is in liters. Since there are 3.785 liters per  
gallon, divide 52.6 by 3.785 to find the number of pulses per liter (52.6 ÷ 3.785 = 13.897).  
Enter 13.789 as the scale factor so the display will read in liters.  
An aluminum sheeting plant has a cut to length application to customer specification. A ten pulse per revolution  
encoder with a 12" wheel is used to sense. The travel of aluminum sheets is in inches. Thus, after 10 pulses, you  
want 12 to appear on the display. Thus, 10 ÷ 12 = .8333. Enter .8333 as your scale factor.  
9
 
PROGRAMMING  
REMARKS  
This section of the menu is used to set  
up the scaling factors for inputs A & B.  
PRESS  
DISPLAY  
STEP  
1
SETTING  
SCALING  
FACTORS  
PRGM  
This sets the decimal for factor A.  
Press the arrow key under the digit  
where the decimal is desired. To clear  
the decimal, press the arrow key fur-  
thest to the right (PRGM) .  
ENTER  
This is the scaling factor for input A. To  
change, press the arrow key under the  
digit(s) to change. Press ENTER to  
enter the displayed value.  
#####  
ENTER  
ENTER  
This section will only appear in the  
RATE only version. Press the PRGM  
key to choose HIGH CPS (0-9.99KHz)  
or LOW CPS (0-40Hz). Press the  
ENTER key to enter the displayed  
choice.  
THIS SECTION  
WILL ONLY  
APPEAR IN THE  
RATE METER  
ONLY VERSION  
(DPF78)  
or  
This sets the decimal for factor B.  
Press the arrow key under the digit  
where the decimal is desired. To clear  
the decimal, press the arrow key fur-  
thest to the right (PRGM) .  
ENTER  
ENTER  
This is the scaling factor for input B. To  
change, press the arrow key under the  
digit(s) to change. Press ENTER to  
enter the displayed value.  
#####  
10  
 
PRESS  
DISPLAY  
REMARKS  
PRGM  
PRGM  
STEP  
2
SETTING  
THE  
This section of the menu sets up the counter  
information.  
Press the PRGM key to choose RST 0 (reset  
to0, countup)orSETPR(settopreset, count  
down), press the ENTER key to enter the  
displayed choice.  
COUNTER  
or  
ENTER  
ENTER  
DPF75  
&
DPF76  
ONLY  
This sets the decimal location for the A & B  
counters. Press the arrow key under the  
desired digit location. To clear the decimal,  
pressthearrowkeyfurthesttotheright.Press  
the ENTER key to enter the displayed loca-  
tion.  
Press the program key to choose A NET B  
(add or subtract A & B) or A SEP B (view A &  
B as separate counters). Press the ENTER  
key to enter the displayed choice.  
or  
or  
or  
ENTER  
ENTER  
ENTER  
This section will only appear if A NET B was  
selected. Choose A SUB B (A subtract B) or  
A ADD B. Press the ENTER key to enter the  
displayed choice.  
Press the PRGM key to choose HIGH CPS  
(0-9.99KHz) or LOW CPS (0-40Hz). Press  
the ENTER key to enter the displayed choice.  
11  
 
PRESS  
DISPLAY  
REMARKS  
STEP  
3
PRGM  
PRGM  
PRGM  
SETTING  
THE RATE  
This section of the menu is used to set up the  
rate information.  
DPF75  
&
DPF78  
ONLY  
Press the PRGM key to choose RPS (rate per  
second) or SCALE (RPM, RPH). Press ENTER  
to enter displayed choice.  
or  
or  
ENTER  
ENTER  
Press PRGM to choose ÷60 (RPM) or ÷3600  
(RPH). Press ENTER to enter displayed choice.  
This sets the normalizing (averaging) factor.  
Press the arrow keys under the desired digits to  
change. Press ENTER to enter displayed value.  
ENTER  
ENTER  
This sets the number of significant figures to be  
displayed. Press the arrow key under the digit to  
change. Press ENTER to enter displayed value.  
This sets the delay time (0.0 to 9.9) that the unit  
will "look" for valid input data before the display  
falls to 0. Press the arrow key under the digits to  
change. Press ENTER to enter displayed value.  
ENTER  
12  
 
PRESS  
DISPLAY  
REMARKS  
STEP  
4
SETTING  
LOCK  
PRGM  
PRGM  
PRGM  
PRGM  
This section of the menu is used to set up the  
lockout type and code.  
LC PG = Locks program but presets and reset  
are accessible.  
LC ALL= Locks entire keypad.  
or  
Press the PRGM button to toggle between  
choices; Press ENTER to enter displayed choice.  
ENTER  
After CODE flashes the display will show the  
existing lock code. To change the code press  
the key under each digit to be changed. Press  
ENTER to enter displayed value.  
Flashes  
followed by:  
ENTER  
LOCK  
Key in the lock code (see programming step 4)  
by pressing the keys under the digits to be  
changed. Press the ENTER key to enter the  
displayed code.  
Flashes  
followed by:  
SETTING  
THE  
LOCK  
STATUS  
After the code is entered the unit will display  
LOC (unit is locked) or UN LOC (unit is un-  
locked). This message will be displayed for  
approximately 3 seconds before the unit returns  
to the run mode.  
or  
ENTER  
13  
 
PRESS  
DISPLAY  
REMARKS  
PRGM  
PRGM  
PRGM  
PRGM  
PRGM  
STEP  
5
SETTING  
THE  
RELAYS  
This section sets up the relay information.  
Press the PRGM key to choose A TOT (A  
assigned to total) or A RATE (A assigned to  
rate). Press ENTER when the desired choice  
is displayed.  
This step will only  
appear on DPF75  
or  
ENTER  
This is the duration (.1 to 99.9 sec) that relay  
A will remain energized. If 00.0 is selected,  
the relay will latch until reset.  
ENTER  
ENTER  
Press the PRGM key to choose B TOT (B  
assigned to total) or B RATE (B assigned to  
rate). Press ENTER when the desired choice  
is displayed.  
This step will only  
appear on DPF75  
or  
This is the duration (.1 to 99.9 sec) that relay  
B will remain energized. If 00.0 is selected,  
the relay will latch until reset.  
ENTER  
PRE A = Preset A (Final Preset); The set point  
at which output A will trigger. If the displayed  
value is not the desired preset, press the  
key(s) under the digit to be changed.  
SETTING  
THE  
PRESETS  
Followed by  
last PRE A  
entered  
PRE A  
PRE B  
PRE B = Preset B (Prewarn); The set point at  
which output B will trigger. If the displayed  
value is not the desired preset, press the  
key(s) under the digit to be changed.  
Followed by  
last PRE A  
entered  
14  
 
OUTPUT WIRING  
The following diagrams detail the connection of the relay and analog output options. Each relay consist of a form A contact  
(Normally Open). NPN transistor or Normally Closed contacts are available with solder jumpers (see Jumper Options).  
SOLENOID (Single Stage)  
Use Relay A (pins 1 & 2) for single stage preset. When the count or rate (selectable) reaches Preset A, Relay A will  
energize. When Relay A closes, current passes through the solenoid for activation. When operating AC solenoids,  
we recommend the use of an MOV to reduce inductive kickback (use a diode for DC solenoids).  
1 COMMON  
2 N.O.(N.C./NPN)  
3 COMMON  
4 N.O.(N.C./NPN)  
5 INPUT A  
13 V+  
14 I SINK  
BLK  
6 INPUT B  
SOLENOID  
MOV  
BRN  
BLU  
7 11 - 19 V @ 50mA OUT/+DC IN  
8 -DC (GROUND)  
9 RESET INPUT  
10 6 - 14 V @ 50mA  
11 A.C. INPUT  
OFF  
RUN  
ON  
CAL.  
PNP  
Prox Sensor  
4-20mA 0-20mA  
RATE COUNT  
RUN  
SET  
recommended  
12 A.C. INPUT  
ANALOG OUTPUT  
The analog output can be selected to output 4-20 mA or 0-20 mA and can be selected to track the rate or count.  
Pin 13 supplies 12 to 18V to power the current loop. Pin 14 supplies the current sinking driver. When connecting  
a strip chart recorder, make connections as follows:  
STRIP CHART  
RECORDER  
1 COMMON  
2 N.O.(N.C./NPN)  
3 COMMON  
4 N.O.(N.C./NPN)  
5 INPUT A  
13 V+  
+
14 I SINK  
-
PULSE OUTPUT  
6 INPUT B  
+12V  
GND  
7 11 - 19 V @ 50mA OUT/+DC IN  
8 -DC (GROUND)  
9 RESET INPUT  
10 6 - 14 V @ 50mA  
11 A.C. INPUT  
OFF  
ON  
RUN  
CAL.  
4-20mA 0-20mA  
RATE COUNT  
RUN  
SET  
TURBINE FLOWMETER  
12 A.C. INPUT  
ALARMS  
The relays can be used to trigger alarms which warn the operator that a batch is complete or the rate has  
exceeded a set speed. The outputs are programmable to be assigned for rate or count. When assigned to the  
count, the relays can have a user selectable on time (duration) or can be latched until reset.  
1 COMMON  
2 N.O.(N.C./NPN)  
3 COMMON  
4 N.O.(N.C./NPN)  
5 INPUT A  
13 V+  
14 I SINK  
LIGHT  
BELL  
6 INPUT B  
7 11 - 19 V @ 50mA OUT/+DC IN  
8 -DC (GROUND)  
9 RESET INPUT  
10 6 - 14 V @ 50mA  
11 A.C. INPUT  
OFF  
RUN  
ON  
CAL.  
4-20mA 0-20mA  
RATE COUNT  
RUN  
SET  
12 A.C. INPUT  
15  
 
ANALOG OUTPUT OPTION  
Description:  
SWITCH 4: Calibrate (normally off)  
An optional 4-20mA (0-20mA) output has been added to the DPF70  
series. The output can be programmed to track rate or total. This  
feature is available by adding suffix A to the part number. Connec-  
tions are via a 2 terminal pluggable screw connector.  
Switch 4 is used for calibration. Calibration is done at the factory  
and should not be needed (see SWITCH 1 to enter high and low  
values). If recalibration is desired, a calibrated 20mA ammeter  
with 1uA resolution is needed. Attach the "+" lead of the meter to  
pin 13 and the "-" lead to pin 14. Set switch 4 ON (up). The unit  
will output approximately 20.000mA and a decimal will light in the  
third position. Read the output using the ammeter. Press PRE A.  
If the display is the same as the ammeter reading, press ENTER.  
If not, press buttons A through E to step to ammeter reading and  
ENTER. (Disregard display which now shows the last count read-  
ing with decimal point in third position) Return switch 4 to OFF  
(down) position.  
Connections: (see FIG. 1)  
PIN13 supplies the 12 to 18 VDC to power the current loop.  
PIN14 is the control sink driver  
Accuracy:  
50uA worst case  
Compliance Voltage:  
3 to 30 VDC non conductive  
RS232 & RS422 Operation:  
When the unit is suppled with RS232 or RS422, the analog output  
"low" and "high" settings can be accessed and changed through  
the serial port. The codes are as follows:  
Setup:  
The optional analog output feature uses 4 dip switches on the back  
for setup. These switches are used as follows:  
SW1 - View or change "set low" and/or "set high" values  
SW2 - Select output for rate or total  
AL Unit will display (transmit) analog out "low" value.  
AL(S)XXXXX Unit will load analog out "low" with entered  
number. (S) = space  
SW3 - Select 4-20mA or 0-20mA  
SW4 - Calibrate the unit.  
AH Unit will display (transmit) analog out "high" value.  
AH(S)XXXXX Unit will load analog out "high" with entered  
number. (S) = space  
After the regular parameters shown in the programming flowchart  
have been set, locate the 4 switches on the back of the unit. (see  
FIG. 1)  
FIG. 1  
Switch Settings:  
SWITCH 1: Enter Analog Low & High (normally off)  
Switch 1 is used to load in the low (4mA or 0mA) and/or the high  
(20mA) output settings. With power on, set switch 1 ON (up).  
Analog Out  
Serial Port  
Setup Switches  
1 2 3 4  
13 14  
ON  
LOW SETTING is viewed or changed by pressing PRE A. If the  
displayed value is correct, press ENTER. If not, press buttons A  
through E to step to the desired value and press ENTER. (disre-  
gard the display which will show the last count reading).  
REAR VIEW  
1
2
3
4
5
6
7
8
9 10 11 12  
HIGH SETTING is viewed or changed by pressing PRE B. If the  
displayed value is correct, press ENTER. If not, press buttons A  
through E to step to desired value and press ENTER.  
Typical Wiring:  
RELAYA COM.  
RELAYA N.O.  
RELAY B COM.  
RELAY B N.O.  
INPUTA  
1
2
3
4
5
Return switch 1 to OFF (down) position, PRE A and PRE B buttons  
now function to view or change relay trip values.  
PULSE OUTPUT  
INPUT B  
6
7
8
9
10  
11  
12  
+12V  
GND  
SWITCH 2: Select Count or Rate  
11 to 19V @50mA OUT/ +DC IN  
-DC (GROUND)  
RESET INPUT  
SW2 OFF (down): Analog output follows rate  
SW2 ON (up): Analog output follows count  
6 to 14V @ 50mA  
110 / 220 VAC  
110 / 220 VAC  
TURBINE FLOWMETER  
SWITCH 3: Select 4-20mA or 0-20mA  
+
-
11 to 19V OUT 13  
ANALOG OUT (SINK) 14  
SW3 OFF (down): Selects 4-20mA output range  
SW3 ON (up): Selects 0-20mA output range  
STRIP CHART  
RECORDER  
16  
 
INTERFACE CARD RS 232/422 OPERATION  
RS 232/422 SET-UP:  
"EVEN"(paritybitislogic0iftotalnumberoflogic1'sinthefirst  
All serial communication mode changes must be done seven data bits is even), "MARK" (parity bit is always logic 1  
through serial communications. Mode changes cannot be - High / Mark) or "SPACE" (parity bit is always logic 0 - Low /  
done through the front panel. To initialize the unit, place a Space). If a "MARK" parity is chosen, it will appear that two  
jumperbetweenpin7(+12V)[bottomboard]andpin1(init)[DB stopbitsareused. Usethe"MARK"paritywithterminalsusing  
-9 connector] on initial power up. The unit defaults to: 300 parity "OFF" or "NONE". These terminals ignore the parity.  
baud rate,"MARK" parity and device number 01. To enter the The unit does not check the parity but does transmit the parity  
program mode you must set your terminal for 300 baud rate chosen. When setting the parity, the unit will print:  
and "MARK" parity. Next, type D1(s), (s)= space bar. The PARITIES:  
unit will echo back "DEVICE #1:". Now type EP (enter MARK-0 SPACE-1 EVEN-2 ODD-3  
program) and a carriage return (ENTER). The unit will echo Then the unit will prompt you:  
back "PROGRAM SETTING". You are now in the program- PARITY<MARK>?  
ming mode.  
If this is the desired parity press return (ENTER), if it isn't enter  
the number of the desired parity then press return (ENTER).  
SETUP PROCEDURE:  
The following sections consist of the communications setup STROBE LIST:  
options as they appear in the menu. (If you wish to exit the The serial interface card is also equipped with a strobe line.  
program mode, at any time you can hit the "escape key" (Hex When the strobe line is triggered, a chosen set of data will be  
Code: 1B) and the unit will save the changes made but not transmitted to be displayed or printed. The selections for the  
effect the remaining data values.) When each section of the display list are entered in the program mode. Enter "1" to add  
setup menu is displayed, the current data will appear in the < selections to the list and enter "0" to delete selections from the  
> signs. If you wish to change the data, type in the number list. The seven available items for the strobe display list are:  
of the desired choice and press return (ENTER). If you wish (1) Preset A, (2) Preset B, (3) K-Factor A, (4) K-Factor B, (5)  
to keep the current data, simply press return.  
Rate of A, (6) Count A, (7) Count B. In the "A net B" mode  
Count A will display the Net Count and Count B is an invalid  
command and the unit will transmit useless data. When  
DEVICE NUMBER:  
Each unit in the hook-up must be assigned it's own device setting the strobe list the unit will print :  
number (1 to 99). Zero is reserved for a dedicated hook-up to ENTER STROBE LIST:  
only one terminal, and it's transmit output line remains in an DO NOT DISPLAY-0 DISPLAY-1  
"on" active state. The device number is entered in the The unit will prompt you:  
program mode. The unit will prompt you:  
DEVICE# <XX>?  
PRESET A<DISPLAY>?  
PRESET B<DISPLAY>?  
If XX is the desired device number press return (ENTER), if K-FACTOR A<DISPLAY>?  
not enter the desired number after the question mark and K-FACTOR B<DISPLAY>?  
press return (ENTER).  
RATE<DISPLAY>?  
COUNT A<DISPLAY>?  
COUNT B<DISPLAY>?  
BAUD RATE:  
The baud rate is the speed at which data is transmitted, If the above choices are entered, when the strobe line is  
expressed in bits per second. Baud rates of 300, 600, 1200, triggered (3-30V positive pulse) the unit will transmit:  
2400, 4800 or 9600 are available. When in the baud rate DEVICE# 1:  
section of the menu, the unit will list :  
BAUD RATES:  
1:300 2:600 3:1200  
4:2400 5:4800 6:9600  
then prompt you:  
PA XXXXX  
PB XXXXX  
KA XXXXX  
KB XXXXX  
DR XXXXXX  
DA XXXXXX  
BAUD RATE <300>?  
Press return (ENTER) if this is the desired baud rate or enter DB XXXXXX  
the assigned number of one of the six possible baud rates. If (SEE COMMANDS BELOW FOR DESCRIPTION OF COM-  
an invalid baud rate is entered the unit will prompt you to MAND CODES).  
choose another baud rate. This will occur until a valid baud Each time the strobe line gets triggered the unit will transmit  
rate is entered or escape is pressed.  
this data unless the program mode is entered and the strobe  
list altered.  
PARITY:  
Parity is a bit of information that is inserted before the stop bit After these four items have been entered they will remain  
and is used to help check if the transmission is correct. When unaltered unless the program mode is entered again and the  
setting the parity you may select "ODD" (parity bit is logic 0 if values changed. The unit is now set and must be addressed  
total number of logic 1's in the first seven data bits is odd), by its device number to come on line again.  
17  
 
SERIAL INPUT COMMANDS:  
TheinputimpedanceofRS232is3Kto7Kworstcase. The  
To get a unit on line you must address it by its device number. terminal addressing the unit must be capable of driving all  
This is done by typing DXX(S), XX= device number. The unit loads in the loop. The input impedance of RS422 is much  
comes on line and echoes back DEVICE# XX. Insure that higher and there should be no problem driving as many as 99  
"DEVICE# XX:" is received before requests are sent. The unit units. The transmit line remains in a high impedance "off"  
is now ready to receive a command or string of commands state until addressed. Only one unit is to be on line at a time!!!  
separated by a space. A carriage return (enter) will enter the More than one unit on line could damage the unit or destroy  
commands and processing of requests begins. The carriage the transmitted data.  
return (Hex Code "D") puts the unit "off line" after data is When the unit is active (on line) it will operate in a full duplex,  
processed.  
echo back mode, so that data sent from the terminal will be  
transmitted back for verification. When the unit is "on line",  
use the proper serial transmit commands to request data or  
set a new value. Up to 80 characters of data can be linked  
together and transmitted to the unit in a string as long as there  
is a space between the commands. If an error is made, a  
correction can be made by back spacing and retyping correct  
data before the return (enter) is sent. Once a return (enter) is  
sent, the unit begins processing the data and will transmit the  
requested data on a non-priority basis over the data transmit  
line. A keypad entry or incoming data will halt the data  
communication cycle. Therefore, there should be a pause  
after data is requested to insure that all data has been  
transmitted before making another request or addressing  
another unit. If the unit is not busy, it should not take longer  
than300msectoprocesseachrequest. Tofindthecycletime  
to process and transmit a request, calculate the bit transmit  
time by using this formula: [(1÷ baud rate) x (80) + .005] x  
number of requests made. This time will be extended if the  
unit must service the front keypad. If transmission has not  
started within two seconds after data is requested, it can be  
assumedthatthereisaproblem. Theunittransmitsacarriage  
return and line feed after each data value. Any new commu-  
nication must be started with DXX(S) (device number and  
space).  
COMMANDS:  
EP...........Unit will enter program mode.  
DA..........Unit will display (transmit) Count A.  
DB..........Unit will display (transmit) Count B.  
DR..........Unit will display (transmit) rate A.  
KA..........Unit will display K-factor A.  
†*KA(S)XXXXX....Unit will load K-factor A  
with entered number.  
KB..........Unit will display K-factor B  
†*KB(S)XXXXX....Unit will load K-factor B  
with entered number.  
PA...........Unit will display Preset A.  
†PA(S)XXXXX....Unit will load Preset A with  
entered number.  
PB...........Unit will display Preset B  
†PB(S)XXXXX....Unit will load Preset B with  
entered number.  
RA..........Counter A will reset  
†*RA(S)XXXXXX...Unit will set Counter A to  
entered number.  
RB..........Counter B will reset.  
†*RB(S)XXXXXX...Unit will reset Counter B to  
entered number.  
*THE UNIT WILL RECOGNIZE A DECIMAL IF ONE IS  
PLACED IN ANY OF THESE DATA VALUES.  
RS232/RS422 - IBM-PC INTERFACE:  
ThefollowingprogramisforIBMbasictosetupRS232/RS422  
†THE UNIT WILL ONLY RECOGNIZE THE LAST FIVE on serial port (#1) at 300 baud. Run this program after  
DIGITS ENTERED (SIX DIGITS FOR RA & RB).  
The following is an example of requests and responses:  
Transmit from terminal Receive from unit  
(s)=Space  
connecting the serial interface connections.  
10 SCREEN 0,0:WIDTH 80  
20 CLS:CLOSE  
D5(s) [Unit #5 Activated]  
PA(s)12345(s)PA  
KA(s)1576(s)KA  
KB(s)6751(s)KB  
RA(s)RB[RETURN]  
DEVICE# 5:  
PA 12345 PA  
KA 1576 KA  
KB 6751 KB  
RA RB  
30 OPEN "COM1:300,n,7,1,CS,DS,CD" AS #1  
40 ON ERROR GOTO 110  
50 B$=INKEY$  
(UNIT PRESETS AND A & B K-FACTORS ARE SET AND  
BOTH COUNTERS ARE RESET)  
12345  
1576  
6751  
60 IF B$< >"" THEN PRINT #1,B$;  
70 IF EOF (1) THEN 50  
SERIAL INTERFACE OPERATION:  
Data is received and transmitted over standard EIA RS232 or  
RS422 levels. Each ten bit character is made up of a start bit, 80 A$=INPUT$ (LOC(1),#1)  
seven bit ASCII code, a parity bit and a stop bit. Device  
number, baud rate, parity and strobe list are entered in the 90 PRINT A$;  
program setup mode and will remain in memory even if power  
is lost.  
100 GOTO 50  
110 RESUME  
18  
 
RS232 / RS422 WIRING  
RS 232  
RECEIVE PIN (3)  
COMPUTER HOOKUP:  
RS232: WhenconnectingtheunittoacomputerwithRS232  
communication, only three connections are needed. These  
connections are: Receive data, Transmit data and Ground.  
The connections should be made as follows:  
RST  
ENTER LOCK PRE  
TRANSMIT PIN (2)  
GROUND PIN (5)  
A
B
C
D
E
A
PRE B VIEW PRGM  
RS 422  
RECEIVE A (+) PIN (3)  
RECEIVE B (-) PIN (8)  
TRANSMIT A (+) PIN (2)  
DP -9 CONNECTOR  
Transmit data (pin 2)  
Receive data (pin 3)  
Ground (pin 5)  
COMPUTER  
Receive data  
Transmit data  
Ground  
RST  
ENTER LOCK PRE  
A
B
C
D
E
A
PRE B VIEW PRGM  
TRANSMIT B (-) PIN (7)  
GROUND PIN (5)  
RS422: WhenconnectingtheunittoacomputerwithRS422,  
five connections are needed. These connections are: Re-  
ceive data A (+), Receive data B (-), Transmit data A (+),  
Transmit data B (-) and Ground. The connections should be  
made as follows:  
9
8
7
6
5
4
3
2
1
RS 232  
RS 422  
DP -9 CONNECTOR  
Transmit data A(+) (pin 2  
Transmit data B(-) (pin 7)  
Receive data A(+) (pin 3)  
Receive data B(-) (pin 8)  
Ground (pin 5)  
COMPUTER  
Receive data A(+)  
Receive data B(-)  
Transmit data A(+)  
Transmit data B(-)  
Ground  
1. INITIALIZE  
2. TRANSMIT  
3. RECEIVE  
4. N/C  
5. GROUND  
6. STROBE  
7. N/C  
1. INITIALIZE  
2. TRANSMIT A (+)  
3. RECEIVE A (+)  
4. N/C  
5. GROUND  
6. STROBE  
7. TRANSMIT B (-)  
8. RECEIVE B (-)  
9. N/C  
8. N/C  
9. N/C  
RS 232  
STROBE PIN (6)  
+12V PIN (7)  
(BOTTOM BOARD)  
PRINTER HOOKUP:  
When connecting the unit to a printer, you must first program  
the desired baud rate, parity and strobe list with a computer.  
After theunitisprogrammeditcanbeconnectedtotheprinter.  
Connect the transmit line(s) of the unit to the receive line(s) of  
the printer and be sure that both devices have common  
grounds. Whenthestrobelineistriggeredtheunitwilltransmit  
the selected strobe list which you had previously pro-  
grammed.  
RST  
ENTER LOCK PRE  
TRANSMIT PIN (2)  
GROUND PIN (5)  
A
B
C
D
E
A
PRE B VIEW PRGM  
RS 422  
STROBE PIN (6)  
+12V PIN (7)  
(BOTTOM BOARD)  
RST  
ENTER LOCK PRE  
TRANSMIT A (+) PIN (2)  
A
B
C
D
E
A
PRE B VIEW PRGM  
TRANSMIT B (-) PIN (7)  
GROUND PIN (5)  
19  
 
TROUBLESHOOTING GUIDE  
PROBLEM  
POSSIBLE CAUSES  
SOLUTIONS  
Power is applied to unit but the display 1. AC or DC power wiring is incorrect. 1. Recheck power wiring  
does not light.  
Unit works, but occasionally the display 1. Line noise is affecting the processor 1. Use a different power supply or  
freezes or skips counts.  
due to a current spike or surge.  
install a surge suppressor.  
Input signal is connected but the unit 1. Input wiring is incorrect.  
1. Recheck input wiring.  
does not count or display rate.  
2. Scale factors are incorrect.  
3. Transmitting device is defective.  
4. Wrong debounce filtering selected.  
5. Unit is defective.  
2. Recheck scale factors and factor  
calculations.  
3. Replace transmitting device.  
4. Recheck debounce filtering selection  
"hi cps" or "lo cps".  
5. To confirm set scale factors at one  
and connect a wire to pin #7 and  
touch it to pin # 5 (input A). Each  
time pin #5 is touched counter A  
should count once. If not, call  
OMEGA. (this test will not  
work on units with quadrature input)  
Rate is displaying: r FFFFF.  
1. The unit is trying to display a  
number which it can't (too small or  
too large).  
1. Check scaling factor, if it is correct,  
lower the number of significant  
figures.  
2. Line noise affected unit on power  
up.  
2. Reprogram the unit, be sure to enter  
a decimal (enter one and remove it if  
a decimal is not desired).  
Relays are not activating properly.  
1. Wrong relay duration.  
2. Relay set for wrong activation  
i.e. count instead of rate.  
1. Recheck programmed relay duration.  
2. Recheck programmed relay  
activation mode.  
Counter resets before reaching 999999. 1. Relay duration is set at a value other 1. If relay outputs are not being used,  
than 00.0. This causes the counter  
to auto-reset at the preset.  
set the relays for rate (DPF75 only).  
2. Set the relay durations to 00.0.  
Various menu items are not being  
displayed.  
1. The menu flow chart and the setup  
steps show the setup for the units  
with rate and total (DPF75). When  
using a unit which has only count  
(DPF76) or only rate (DPF78)  
several menu items will not be  
displayed.  
1. The menu items which do not  
appear are not used for the models  
without the ratemeter (DPF76) or  
without the counter (DPF78).  
Therefore, disregard any menu items  
which appear on the flowchart and  
setup steps, but do not appear on  
the unit's display.  
20  
 
NOTES  
21  
 
NOTES  
22  
 
NOTES  
23  
 
WARRANTY/DISCLAIMER  
OMEGA ENGINEERING, INC. warrants this unit to be free of defects in materials and workmanship for a  
period of 13 months from date of purchase. OMEGA’s WARRANTY adds an additional one (1) month  
grace period to the normal one (1) year product warranty to cover handling and shipping time. This  
ensures that OMEGA’s customers receive maximum coverage on each product.  
If the unit malfunctions, it must be returned to the factory for evaluation. OMEGA’s Customer Service  
Department will issue an Authorized Return (AR) number immediately upon phone or written request.  
Upon examination by OMEGA, if the unit is found to be defective, it will be repaired or replaced at no  
charge. OMEGA’s WARRANTY does not apply to defects resulting from any action of the purchaser,  
including but not limited to mishandling, improper interfacing, operation outside of design limits,  
improper repair, or unauthorized modification. This WARRANTY is VOID if the unit shows evidence of  
having been tampered with or shows evidence of having been damaged as a result of excessive corrosion;  
or current, heat, moisture or vibration; improper specification; misapplication; misuse or other operating  
conditions outside of OMEGA’s control. Components which wear are not warranted, including but not  
limited to contact points, fuses, and triacs.  
OMEGA is pleased to offer suggestions on the use of its various products. However,  
OMEGA neither assumes responsibility for any omissions or errors nor assumes liability for any  
damages that result from the use of its products in accordance with information provided by  
OMEGA, either verbal or written. OMEGA warrants only that the parts manufactured by it will be  
as specified and free of defects. OMEGA MAKES NO OTHER WARRANTIES OR  
REPRESENTATIONS OF ANY KIND WHATSOEVER, EXPRESS OR IMPLIED, EXCEPT THAT OF TITLE,  
AND ALL IMPLIED WARRANTIES INCLUDING ANY WARRANTY OF MERCHANTABILITY AND  
FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. LIMITATION OF  
LIABILITY: The remedies of purchaser set forth herein are exclusive, and the total liability of  
OMEGA with respect to this order, whether based on contract, warranty, negligence,  
indemnification, strict liability or otherwise, shall not exceed the purchase price of the  
component upon which liability is based. In no event shall OMEGA be liable for  
consequential, incidental or special damages.  
CONDITIONS: Equipment sold by OMEGA is not intended to be used, nor shall it be used: (1) as a “Basic  
Component” under 10 CFR 21 (NRC), used in or with any nuclear installation or activity; or (2) in medical  
applications or used on humans. Should any Product(s) be used in or with any nuclear installation or  
activity, medical application, used on humans, or misused in any way, OMEGA assumes no responsibility  
as set forth in our basic WARRANTY/DISCLAIMER language, and, additionally, purchaser will indemnify  
OMEGA and hold OMEGA harmless from any liability or damage whatsoever arising out of the use of the  
Product(s) in such a manner.  
RETURN REQUESTS/INQUIRIES  
Direct all warranty and repair requests/inquiries to the OMEGA Customer Service Department. BEFORE  
RETURNING ANY PRODUCT(S) TO OMEGA, PURCHASER MUST OBTAIN AN AUTHORIZED RETURN  
(AR) NUMBER FROM OMEGA’S CUSTOMER SERVICE DEPARTMENT (IN ORDER TO AVOID  
PROCESSING DELAYS). The assigned AR number should then be marked on the outside of the return  
package and on any correspondence.  
The purchaser is responsible for shipping charges, freight, insurance and proper packaging to prevent  
breakage in transit.  
FOR WARRANTY RETURNS, please have the  
following information available BEFORE  
contacting OMEGA:  
FOR NON-WARRANTY REPAIRS, consult OMEGA  
for current repair charges. Have the following  
information available BEFORE contacting OMEGA:  
1. Purchase Order number under which the product  
was PURCHASED,  
1. Purchase Order number to cover the COST  
of the repair,  
2. Model and serial number of the product under  
warranty, and  
3. Repair instructions and/or specific problems  
relative to the product.  
2. Model and serial number of the product, and  
3. Repair instructions and/or specific problems  
relative to the product.  
OMEGA’s policy is to make running changes, not model changes, whenever an improvement is possible. This affords  
our customers the latest in technology and engineering.  
OMEGA is a registered trademark of OMEGA ENGINEERING, INC.  
© Copyright 2002 OMEGA ENGINEERING, INC. All rights reserved. This document may not be copied, photocopied,  
reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the  
prior written consent of OMEGA ENGINEERING, INC.  
 
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Process Measurement and Control?  
OMEGA…Of Course!  
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