Quantum Marine Radio HD 9021 User Guide

HD 9021  
INSTRUCTIONS MANUAL  
 
HD 9021  
QUANTUM - PHOTO - RADIOMETER  
 
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ENGLISH  
1 Input A socket, DIN 8-pole connector  
2 Display  
3 REL: the symbol indicates that the instrument is storing the Maximum, Minimum  
and Q energy values  
4 MAX: the symbol indicates the maximum value of the chosen unit  
5 MIN: the symbol indicates the minimum value of the chosen unit  
6 A, B, A-B: the symbol indicates the relative value at the input A, B, or the differen-  
ce between the two inputs A-B  
7 AUTO: the symbol indicates that the automatic change of scale device is enabled  
8 °C/°F: key for selecting temperature reading in °C or °F  
9 lx/fcd: key for selecting reading in lx=lux or fcd=footcandle  
10 Data reset: the key erases the memory of the maximum, minimum and Q energy  
values and the integration time  
11 REC: when this key is pressed, the maximum, minimum and Q energy values and  
the integration time in seconds, minutes, hours, are stored and updated  
12 Itime: when this key is pressed in sequence, the integration time that has elapsed  
appears on the display in s=seconds, m=minutes and h=hours  
13 MAN: key for choosing the working scale manually  
14 , Serial out: the key has two functions. The first of these, when pressing the Q  
key, makes the value advance towards the top of the acoustic alarm signal inter-  
vention threshold, the second enables the serial output for one item only and, if  
pressed for more than 3 seconds, enables the serial output continuously with a  
fixed rate of 10 seconds  
15 Q energy: when the key is pressed, followed by the and keys, this sets the  
threshold value above which the alarm intervenes  
16 A: key for activating the display of input A  
17 A-B: key for activating the display of the difference between inputs A and B  
18 SUB D male 9-pole connector. The cable with electronics for the serial output  
RS232C, code AD RS232C, may be coupled to this connector  
19 Input B socket, DIN 8-pole connector  
20 X10-8: multiplication factor for the chosen unit; this may be 103, 106, -103, or -106  
21 lx: symbol indicating that the reading is in lux  
22 E/m-2s: symbol indicating that the reading is in µEinstein  
23 fcd/m2: symbol indicating that the measurement is in footcandle m2  
24 °C: symbol indicating that the temperature measurement is in °C  
25 °F: symbol indicating that the temperature measurement is in °F  
26 Wm2: symbol indicating that the measurement is in Wm2  
27 Q energy: symbol indicating the quantity of energy in the integration time X  
28 m: integration time in minutes  
29 s: integration time in seconds  
30 h: integration time in hours  
31 ON/OFF: key for switching the instrument on or off  
32 DATA CALL: key for calling and reading on the display the stored maximum, mini-  
mum and Q values  
33 AUTO: this key enables the automatic change of scale function of the instrument  
34 , after the Q energy key has been pressed, this key reduces the threshold value  
above which the acoustic alarm intervenes  
35 B: key for activating the display of input B.  
 
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ENGLISH  
Key  
Symbols lit besides  
the numbers  
Description  
All the symbols are  
lit for a few seconds  
after switching on.  
Key for switching the instrument on  
and off. The instrument switches off  
automatically about 8 minutes after  
this key has been pressed, as it has  
a built-in switch-off device. If any  
key other than the ON/OFF key is  
pressed, the instrument switches  
off 8 minutes after the last key was  
pressed.  
lx/fcd  
°C/°F  
For measuring ILLUMINANCE;  
when this key is pressed the rea-  
ding may be in the photometric unit  
lux or foot candle if a photometric  
probe is fitted in the instrument.  
If a temperature probe of the TP870  
series is fitted in the instrument, this  
indicates the temperature measu-  
red by the probe. The key may be  
pressed alternately to give a rea-  
ding in °C or °F.  
When the key is pressed it erases  
from the memory and resets the  
maximum, minimum and integrated  
Q energy values, then resets the  
count of the time elapsed.  
RCD  
When the key is pressed the instru-  
ment stores and updates the maxi-  
mum, minimum and integrated Q  
energy values for the time elapsed,  
recorded by the measurement pro-  
be fitted. The battery symbol fla-  
 
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ENGLISH  
Key  
Symbols lit besides  
the numbers  
Description  
shes.  
During the RCD phase the AUTO-  
POWER-OFF function is disabled,  
that is the instrument does not swit-  
ch off automatically. To switch off,  
press the ON/OFF key. If the stored  
data are not reset they remain in  
the memory until REC is pressed  
again. When the key is pressed for  
the first time it starts storing data in  
the memory, the second time it sto-  
ps data storage (the data stored so  
far are not erased), the third time it  
restarts storage and updates the  
data.  
MAX  
MIN  
When the key is pressed during  
RECORD phase or at the end of Q  
RECORD, before the DATA RESET  
key is pressed, the display shows in  
sequence the maximum value recor-  
ded by the probe, the minimum  
value, the Q Energy value and finally  
the current value. If the DATA  
RESET key has been pressed, the  
"Err" message appears on the  
display, referring to the maximum,  
minimum and Q Energy values.  
AUTO  
When the AUTO key is pressed the  
instrument chooses what scale to  
operate on. Change of scale is  
automatic.  
 
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ENGLISH  
Key  
Symbols lit besides  
the numbers  
Description  
When the MAN key is pressed the  
user chooses what scale to operate  
on. There are 4 scales available,  
except for temperature measure-  
ment where there are 2.  
s
m
h
When this key is pressed the Q  
Energy integration time that has  
elapsed since the REC key was  
pressed appears on the display in  
seconds, minutes or hours.  
To quit the routine, press the key  
for the channel in which the reading  
is being taken.  
MAX - Q  
When this key is pressed followed  
by the  
and  
keys, it sets the  
maximum value of the Q Energy  
threshold above which a buzzer  
sounds to indicate that the set thre-  
shold has been reached. When  
pressed for the second time it indi-  
cates the set threshold.  
The value goes from 0 to 1999,  
then continues with 103 and 106. Q  
Energy calculation begins when the  
REC key is pressed and continues  
until it is interrupted by pressing  
REC again. When the set threshold  
is exceeded the internal buzzer  
sounds intermittently as long as the  
instrument is in record mode.  
NOTE: When setting the alarm  
threshold, if the keys  
and (or  
) are pressed simultaneously, this  
makes the value on the display  
advance faster. This may be useful  
 
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ENGLISH  
Key  
Symbols lit besides  
the numbers  
Description  
if a high value is to be set.  
This key has two functions; in the  
first, when Q is set, it increases the  
value; the second function enables  
the serial output. When the key is  
pressed only once, the figure  
shown on the display is sent to the  
serial output. If the key is pressed  
for more than three seconds the  
continuous serial output is enabled;  
this means that what is shown on  
the display is sent continuously to  
the serial output every 10 seconds.  
To quit, press the key.  
During Q setting the serial output is  
disabled.  
During setting of the maximum Q  
threshold this key is used to  
decrease the set value.  
A
B
Key for selecting the input A probe,  
if the probe is not inserted the "Err"  
message appears.  
Key for selecting the input B probe,  
if the probe is not inserted the "Err"  
message appears.  
A-B  
Key for displaying the difference in  
value between inputs A and B; if no  
probe is inserted, or if the probes  
are of a different type, the message  
E1 appears.  
 
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ENGLISH  
Key  
Symbols lit besides  
the numbers  
Description  
Err  
E1  
If the probe is not connected to the  
instrument when it is switched on, or  
if there is a break in the probe, the  
"Err" message appears.  
This message appears on the  
display when the user tries to obtain  
the difference between inputs A and  
B when two probes of different types  
are connected.  
OFL  
This symbol appears on the display  
when the reading is out of scale.  
PROBE CONNECTION  
The HD 9021 may be fitted with either one or two probes; the instrument  
has two DIN 45326 8-pole inputs, input A and input B. If only one input is  
used, be careful when using the keys for input A or B.  
The instrument recognizes the type of probe connected, which is distingui-  
shed by a suitable code; it then gets ready to take the measurement accor-  
ding to the characteristics of the probe connected. The connectors are  
polarized and it takes a certain effort to insert or remove them; proceed in  
such a way as to avoid damaging the connector, do not pull the cables to  
disconnect the probe as there would be a risk of tearing them.  
HOW TO MEASURE  
Press the ON/OFF key to switch on the instrument. If the probes are con-  
nected, the instrument is ready to indicate their value. The instrument may  
be fitted with probes for measuring temperature (°C, °F), probes for photo-  
metric measurements (lux, fcd) or radiometric probes (W/m2). When the  
instrument is switched on the auto-power off device is activated; this  
means that the instrument switches off automatically after 8 minutes  
unless another key is pressed. If the instrument switches off automatically  
while a measurement is being taken it is sufficient to switch it back on.  
Measurements are taken by positioning the probe in the desired point; the  
choice of the type of probe, the position and place depend on the type of  
recording that the user intends to make.  
The operator must be sure that his own presence, foreign bodies or outsi-  
de sources do not interfere with the recording.  
 
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ENGLISH  
The light emitted by a lamp varies with the square of the current, so there  
may very well be variations in values during the test which the human eye  
does not detect.  
When measuring temperature choose the probe most suited for the case:  
immersion, penetration or surface probes. It is sufficient to immerse the  
probe in the liquid of which you want to measure the temperature or place  
in contact with the surface; in the case of penetration probes, the tip of the  
probe must penetrate the block in which the temperature is to be measu-  
red.  
METHOD OF USE  
Although the probes are sturdy, they must be used with due care so as to  
avoid spoiling, scoring or breaking the filters or diffusors. Do not use them  
at temperatures higher than 50°C; be careful when there is a concentration  
of luminous beams or arc lights.  
- Do not use the probes in the presence of corrosive gases or liquids or  
immerse them in liquids unless they are made for these purposes.  
- Always use the most suitable probe for the measurement to be taken.  
- Be careful with the range of use of the probe.  
- Always clean the probes carefully after use.  
- The instrument is resistant to water but it is not watertight, so if it should  
fall into the water, take it out immediately and check that no water has  
infiltrated.  
 
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ENGLISH  
LOW BATTERY WARNING  
If the battery voltage falls below  
acceptable levels, a beep sounds  
every 30 seconds and the  
symbol appears. From that  
moment there remains about 1  
hour autonomous operation,  
however the battery should be  
replaced as soon as possible.  
To change the battery turn the  
screw on the door of the battery  
compartment in an anti-clockwise  
direction.  
After replacing it (with an ordinary  
9V battery IEC 6LF22) close the  
door, inserting the tag on the door  
into the slot provided, and turn the  
screw in a clockwise direction.  
Ensure that the instrument is  
switched off before changing  
the battery.  
FAULTY OPERATION WHEN SWITCHING ON AFTER CHANGING THE  
BATTERY  
If the instrument does not switch on or off after changing the battery,  
repeat the battery changing procedure, waiting for a few minutes after  
removing the battery to allow the circuit condenser capacities to be com-  
pletely discharged, then insert the battery.  
Check that the battery you are using is really efficient; sometimes unused  
batteries have not been recently manufactured so, due to the auto-dischar-  
ge phenomenon, their voltage level is insufficient for correct operation of  
the instrument.  
WARNING  
If the instrument is not to be used for a long period the battery should be  
removed.  
*
If the battery is flat it must be replaced immediately.  
Avoid leakage of fluid from the battery.  
Always use good quality watertight batteries.  
*
*
*
 
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ENGLISH  
MAINTENANCE  
Storage conditions.  
Temperature: -20 to +60°C  
Humidity: less than 85% relative humidity.  
Do not store the instrument in places where:  
*
*
*
1 - There is a high degree of humidity.  
2 - The instrument is exposed to direct sunlight.  
3 - The instrument is exposed to a source of high temperature.  
4 - There are strong vibrations.  
5 - There is steam, salt and/or corrosive gas.  
The instrument body is made of plastic so it must not be cleaned with sol-  
vents which can spoil plastic.  
SERIAL OUTPUT  
To enable the serial output of the instrument proceed as follows:  
1. Insert the SUB D female 9-pole connector of the adapter cable with elec-  
tronics AD RS232C in the DIN 9-pole socket on the instrument.  
2. Connect the SUB D female 25-pole connector of the fitting to the serial  
input of the printer or computer. The position of the switch in the connec-  
tor must be:  
DCE: data communication equipment (Modem)  
DTE: data terminal equipment (Computer)  
3. If you want to send what is shown on the display (once only), press the  
key until the instrument emits two beeps.  
4. If you want to send what is shown on the display continuously, at a fixed  
rate of once every 10 seconds, press the  
key until the instrument  
emits three beeps.  
5. To disable the serial output in continuous transmission, press the key  
until the instrument does not emit a beep.  
6. If the serial output is not being used it is advisable not to fit the cable  
AD RS232C on the instrument, thus saving battery consumption.  
7. Serial output: RS232C  
Data transmission speed  
300 baud  
8 data bit length  
1 start bit  
1 stop bit  
no parity  
 
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ENGLISH  
DTE  
DCE  
AD RS 232C  
DTE - Data terminal equipment  
COMPUTER  
DCE - Data communication equipment  
MODEM  
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
13 12 11 10  
9
8
7
6
5
4
3
2
1
5
4
3
2
1
25 24 23 22 21 20 19 18 17 16 15 14  
9
8
7
6
ANALOG OUTPUT  
It is possible to link up with the SUB D male 9-pole connector of the instru-  
ment to obtain an analog output:  
1
2
3
4
5
6-8 = A  
1-8 = B  
6
7
8
9
B
A
A= 1,9 mV/°C  
2,5 mV/lux  
250  
mV/W  
B= 1,9 mV/°C  
2,5 mV/lux  
250  
mV/W  
1
2
3
4
5
6
7
8
9
 
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ENGLISH  
BLOCK DIAGRAM  
 
– 36 –  
ENGLISH  
LAYOUT OF COMPONENTS  
R 1 7  
R 1 8  
R 3 8  
R 1 6  
R 1 5  
R 3 7  
R 1 2  
R 1 4  
R 1 9  
R 2 0  
X 1  
R 4 5 - 5 1  
TR2  
TR1  
 
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ENGLISH  
CALIBRATING THE INSTRUMENT HD 9021  
1) Open the instrument.  
2) Connect the prods of a precision meter to the following pins on the input  
A (or B) connector: the positive to pin 7 (V+) and the negative to pin 6  
(GND).  
3) With the instrument and the meter switched on, turn the trimmer TR1  
until the display on the meter indicates 4Vdc.  
4) Insert the photometric simulator in the connector A (or B).  
5) Turn the trimmer TR2 until the display on the instrument shows the  
same value as the simulator.  
SERIES HD 9021 PROBE CALIBRATION  
1) Fit the probe in the instrument.  
2) Fit the probe in the photometric bench.  
3) Turn the trimmer T1 of the amplification and calibration circuit in the pro-  
be connector until the value shown on the display coincides with the  
value of the reference instrument.  
R8  
C2  
U2  
C1  
R6  
R1  
2 5  
HOLE  
TR1  
A
C
R2  
R9  
R7  
R5  
R4  
T1  
GUARANTEE  
This instrument is strictly inspected before being sold. However if there  
should be any defect due to manufacture and/or transport, apply to the  
dealer from whom you bought the instrument.  
The guarantee period is 2 (two) years from the date of purchase. During  
this period all defects found by us will be repaired free of charge, exclu-  
ding those due to incorrect use and careless handling. The probes  
are not covered by the guarantee, as they can be irreparably dama-  
ged after only a few minutes of incorrect use.  
 
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ENGLISH  
CHARACTERISTICS  
- Microprocessor-controlled multifunction quantum-photo-radiometric indi-  
cator with LCD indication for measuring sources of light and temperature.  
Measures ILLUMINANCE (lux, foot-candle), IRRADIANCE (W/m2) and  
RADIANCE (cd/m2).  
- 2 inputs for probes and one for RS232C (with an optional adapter  
AD RS232C).  
- Probe connection: 2 DIN 45236 8-pole sockets.  
- Different silicon sensors for various types of measurement.  
- Spectral response:  
photometer 400÷760 nm photopic curve according to CIE (1924)  
radiometer 190 nm - 3.5 micron  
- Conversion frequency: 1 per second.  
- Integration time: from 1 second to 1999 hours.  
TECHNICAL FEATURES  
Measurements and measuring ranges:  
- Photometer: Spectral range 400÷760 nm, automatic change of scale or 4  
manual scales from 0 to 200,000 lx (0÷200,000 fcd). For  
measuring ILLUMINANCE.  
- Radiometer: Spectral range 400÷900 nm, measurements from  
1 microwatt/cm2 to 200 mW/cm2. For measuring IRRADIANCE.  
- UVA: Spectral range 315÷400 nm, peak at 365 nm, measurements from  
10 nanowatt/cm2 to 200 mW/cm2. For measuring IRRADIANCE.  
- UVB: Spectral range 280÷315 nm, peak at 312 nm, measurements from  
10 nanowatt/cm2 to 200 mW/cm2. For measuring IRRADIANCE.  
- UVC: Spectral range 190÷280 nm, peak at 250 nm, measurements from  
10 nanowatt/cm2 to 200 mW/cm2. For measuring IRRADIANCE.  
- PAR (Photosintetically active radiation): Spectral range from 400 to  
700 nm, measurement in microEinstein per square metre per  
second, measuring range from 0 to 20,000 µE m-2s-1.  
- Luminance: Measuring range from 0 to 1999x103 cd/m2.  
- Instrument precision: ±0.1 rdg ±1 digit with a reference temperature of  
25°C ±5°C.  
- Probe precision: Radiometric ±4%.  
Photometric ±5%.  
- Linearity: ±1%.  
- Resolution: 200 = 0.1 : 200 = 1.  
- Stability: 0.15%.  
- Zero drift: ±0.05%/°C of reading.  
- Working temperature: 0...50°C.  
- Storage temperature: -20...+60°C.  
- Relative humidity: 10÷85% RH.  
 
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ENGLISH  
- Display: LCD 12 mm, function and photo-radiometric symbols.  
- Functions: Automatic and manual change of scale, integration time up to  
1999 hours, auto power off. Storage and updating of the  
Maximum, Minimum and Q (Energy) values. Optoinsulated  
serial output RS232C with adapter AD RS232C.  
Analog output 1.9 mV/°C, 2.5 mV/lux, 250 mV/W.  
- Power supply: 9V battery IEC 6LF22.  
- Battery life: 150 hours with alkaline battery.  
- Serial output: RS232C data transmission speed  
300 baud  
1 start bit  
no parity  
8 data bit length  
1 stop bit  
Use the optional adapter cable AD RS232C from SUB  
D female 9-pole to SUB D female 25 pole connectors.  
Manual or automatic transmission of the value displayed;  
at a fixed rate of once every 10 seconds.  
CHARACTERISTICS OF THE INSTRUMENT WHEN MEASURING TEM-  
PERATURE WITH PROBES IN THE SERIES TP870  
Measuring range: -200°C...+800°C (-392°F...+1472°F) in two scales with  
automatic change of scale.  
Resolution: -200°C...+200°C = 0.1, above that =1°C  
Precision with TP870 probe included: -50°C...+200°C (-58°F...+392°F)  
±0.15% ±0.2°C ±1 digit  
over ±0.3% ± 1°C ±1 digit.  
At temperatures higher than 400°C, avoid violent blows or thermal shock to  
the temperature probes as they may cause irreparable damage to the sensor.  
Instrument container: ABS Bayer NOVODUR, black.  
Weight of the instrument alone: 360 g  
Weight of the kit: 2500 g  
Dimensions of the instrument: 135x73x38 mm  
Dimensions of the kit: 370x280x90 mm  
 
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ENGLISH  
ORDER CODE  
HD 9021 K : The kit is composed of the HD 9021 instrument, diplomatic  
carrying case, without probe.  
HD 9021  
PHOT/C  
: Photometric probe for measuring light, illuminance, photopic  
correction filter complying with CIE, diffuser for cosine correc-  
tion. Range 0÷200,000 lux.  
HD 9021  
RAD/C  
: Radiometric probe for measuring light energy, irradiance,  
radiometric filter, diffuser for cosine correction.  
Range 400÷900 nm.  
HD 9021  
RAD/PAR  
: Radiometric probe for measuring radiations in the field of the  
PAR chlorophyll process (Photosynthetically Active Radiation  
400÷700 nm), measurements in µEinstein, diffuser for cosine  
correction.  
HD 9021  
RAD/UVA  
: Radiometric probe for measuring radiation, irradiance, in the  
UVA wave length 315÷400 nm, peak at 365 nm. Quartz diffu-  
ser for cosine correction.  
HD 9021  
RAD/UVB  
: Radiometric probe for measuring radiation, irradiance, in the  
UVB wave length 280÷315 nm, peak at 312 nm. Quartz diffu-  
ser for cosine correction.  
HD 9021  
RAD/UVC  
: Radiometric probe for measuring radiation. irradiance, in the  
UVC wave length 190÷280 nm, peak at 250 nm. Quartz diffu-  
ser for cosine correction.  
HD 9021/Cd: Photometric probe for measuring luminance, photopic correc-  
tion filter complying with CIE. Measuring range from 0 to  
200 cd/cm2.  
AD RS232C : Connecting cable from SUB D female 9-pole to SUB D female  
25 pole, complete with electronics, for serial output RS232C.  
TP 870  
: Immersion temperature probe, Pt100 sensor, diam. 3x230 mm,  
range -60°C...+400°C.  
TP 870C  
TP 870P  
TP 870A  
: Surface temperature probe, Pt100 sensor, diam. 4x230 mm,  
range -60°C...+400°C.  
: Penetration temperature probe, Pt100 sensor, diam.  
4x150 mm, range -60°C...+400°C.  
: Air temperature probe, Pt100 sensor, diam. 4x230 mm, range  
-60°C...+300°C.  
 
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ENGLISH  
PROBES  
The primary purpose of the probes is to detect and measure light in its  
various aspects; for this reason there are different probes available to suit  
the different requirements. Probes are required for measuring illuminance  
(lux, foot-candle), irradiance (W/m2) and luminance (cd/m2). Each sensor  
has its own work band completed by filters or diffusors which correct or  
limit its range. The size of the silicon sensor used in the various probes is  
7.34 mm2. The probes are housed in a container of black anodized alumi-  
nium anticorodal UNI 9006/4; the correction filters are made of special  
glass, while the diffusors are in quartz or plastic material specially desi-  
gned for the purpose. The probe is complete with 2 metres of flexible cable  
and a DIN 45236 8-pole connector inside which is an electronic circuit that  
amplifies and codes the signal supplied by the sensor.  
The probes are calibrated individually and are therefore interchan-  
geable.  
HD 9021 PHOT/C  
Photometric probe for measuring light, ILLUMINANCE, photopic correction  
filter complying with CIE, diffuser for cosine correction. Range  
0÷200,000 lux (0÷200,000 foot candle). This is the probe for measuring  
light with correction according to the human eye; it is suitable for measure-  
ments in offices, schools, laboratories, places of entertainment, emergency  
exits, car parks, galleries, shops, shop windows, factories, etc., in all ligh-  
ting measurements.  
The typical response curve of the probe is  
as follows:  
1.00  
0.89  
0.78  
0.67  
0.56  
0.44  
0.33  
0.22  
0.11  
0.00  
 
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ENGLISH  
HD 9021 RAD/C  
Radiometric probe for measuring the IRRADIANCE of light sources, irra-  
diance of the sun, etc. Radiometric filter and diffuser for angle correction  
according to the cosine law. Spectral measurement range 400÷900 nm,  
range from 1 microwatt/cm2 to 200 milliwatt/cm2. The probe is used in  
greenhouses for measuring the power of artificial light, shade, the perfor-  
mance of solar panels, solar heating plants, solar filters, etc.  
The typical response curve of the probe is  
as follows:  
1.00  
0.90  
0.80  
0.70  
0.60  
0.50  
0.40  
0.30  
0.20  
0.10  
HD 9021 RAD/PAR  
Radiometric probe for measuring PAR radiations (Photosynthetically Active  
Radiation), works in the field of the chlorophyll process following a special  
response curve in a spectral range from 400 to 700 nm. The measure-  
ments are expressed in µEinstein in the range 0÷20,000 µE m-2s-1.  
Photosynthetically Active Radiation, PAR. Flow of photons in the wave-  
length 400÷700 nm.  
Photosynthetic photon flux density, PPRD. The number of photons per  
time unit and air unit in the wavelength 400÷700 nm.  
The measurement is expressed in micromoles per second and per square  
metre. One mole is the equivalent of 6,0222•1023 photons.  
Correction filter according to the cosine law.  
Typical applications of the probe are for research in the field of greenhouse  
lighting, research in undergrowth, etc.  
 
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ENGLISH  
The typical response curve of the probe is  
as follows:  
1.00  
0.89  
0.78  
0.67  
0.56  
0.44  
0.33  
0.22  
0.11  
0.00  
The study and field of application of ultraviolet rays has seen considerable  
growth in the last decades. The ultraviolet field is conventionally subdivi-  
ded into the following three "bands":  
- the band between the wavelengths from 400 to 315 nm. which includes  
radiations defined as type A or UVA;  
- the band between the wavelengths from 315 to 280 nm. which includes  
radiations defined as type B or UVB;  
- the band between the wavelengths from 280 to 100 nm. which includes  
radiations defined as type C or UVC.  
The ultraviolet rays in natural light as it reaches earth through the atmo-  
sphere are of type A.  
The amount of UVA in natural light is much greater than that emitted by  
traditional, incandescent bulbs, halogen or fluorescent lamps.  
Save in the case of prolonged exposure, UVA rays possess a marked tan-  
ning action; they are not harmful to man but they may give rise to biological  
effects that may be beneficial for his health. The problem is the time of  
exposure; in fact, UVA rays have a considerable photochemical action that  
in the course of time produces phenomena of fading, cracking and decay.  
Ultraviolet rays of type B or UVB have the property of encouraging the for-  
mation of vitamin D, but unless suitable precautions are taken they may  
cause erythema or conjunctivitis. The amount of UVB rays emitted by tra-  
ditional lamps is very little in comparison with that emitted by sunlight and  
they are also much less than UVA rays.  
 
– 44 –  
ENGLISH  
UVC rays are useful thanks to their bactericide and ozonizing capacity, so  
they are used in the field of sterilization; another field of application that is  
being developed is in the polymerization of adhesives or resins (photoresi-  
st); as a drawback they cause more serious cases of erythema and  
conjunctivitis than UVB rays.  
Depending on the effects that they produce, ultraviolet rays may also be  
classified as follows:  
Producing ozone in the field  
180÷220 nm  
220÷300 nm  
280÷320 nm  
320÷400 nm  
Producing bactericide (germicide) action in the field  
Producing erythematous action in the field  
Black light in the field  
HD 9021 UVA  
Radiometric probe for measuring radiation power, IRRADIANCE, in the  
UVA wave length 315÷400 nm, peak at 365 nm. Quartz diffuser for cosine  
correction. Measuring range from 10 nanowatt/cm2 to 200 milliwatt/cm2.  
The typical response curve of the probe is  
as follows:  
1.00  
0.90  
0.80  
0.70  
0.60  
0.50  
0.40  
0.30  
0.20  
0.10  
0.00  
 
– 45 –  
ENGLISH  
HD 9021 UVB  
Radiometric probe for measuring radiation power, IRRADIANCE, in the  
UVB wave length 280÷315 nm, peak at 312 nm. Quartz diffuser for cosine  
correction. Measuring range from 10 nanowatt/cm2 to 200 milliwatt/cm2.  
The typical response curve of the probe is  
as follows:  
1.00  
0.90  
0.80  
0.70  
0.60  
0.50  
0.40  
0.30  
0.20  
0.10  
0.00  
HD 9021 UVC  
Radiometric probe for measuring radiation power, IRRADIANCE, in the  
UVC wave length 190÷280 nm, peak at 250 nm. Quartz diffuser for cosine  
correction. Measuring range from 10 nanowatt/cm2 to 200 milliwatt/cm2.  
The typical response curve of the probe is  
as follows:  
1.00  
0.90  
0.80  
0.71  
0.61  
0.51  
0.41  
0.32  
0.22  
0.12  
 
– 46 –  
HD 9021/Cd  
Probe for measuring LUMINANCE, measuring range from 0 to 1999x103  
candles/cm2. Measuring angle 6° with opening surface 25 mm. CIE filter for  
correction according to the human eye.  
6°  
- The CANDLE (cd) is the light intensity in a specific direction of a source  
that emits monochrome radiation at a frequency of 540x1012 Hz and who-  
se energetic intensity in that direction is 1/683 W/sr.  
- The STERADIAN (sr) is the solid angle which, with its vertex in the cen-  
tre of a sphere, subtends a spherical cap with an area equal to the squa-  
re of the radius.  
- LUMINANCE or EMITTANCE is the relationship between the light inten-  
sity emitted in a certain direction and the surface that emits it projected  
onto a plain perpendicular to the same direction; the measuring unit is the  
cd/m2 (candle/square metre) or its submultiple cd/cm2 (1 cd/cm2  
=
10,000 cd/m2).  
Light flux  
Illuminance  
Luminance  
=
=
=
lumen (lm)  
lux (lx)  
nit (nit)  
=
=
=
cd/sr  
lm/m2  
cd/m2  
 
– 47 –  
ENGLISH  
CE CONFORMITY  
Safety  
EN61000-4-2, EN61010-1 level 3  
Electrostatic  
discharge  
EN61000-4-2 level 3  
Electric fast  
transients  
EN61000-4-4 level 3  
EN61000-4-11  
Voltage variations  
Electromagnetic  
interference  
IEC1000-4-3  
sucseptibility  
Electromagnetic  
interference  
emission  
EN55020 class B  
GUARANTEE CONDITIONS  
All our appliances have been subjected to strict tests and are guaranteed for 24 months from date of pur-  
chase. The Company undertakes to repair or replace free of charge any parts which it considers to be inef-  
ficient within the guarantee period. Complete replacement of the instrument is excluded and no requests  
for damages are recognized, whatever their origin. Repairs are carried out in our own Technical Service  
Department. Transport expenses are borne by the buyer. The guarantee does not include: accidental  
breakages due to transport, incorrect use or neglect, incorrect connection to voltage different from  
that contemplated for the instrument, probes, sensors, electrodes and all accessories. Furthermore  
the guarantee is not valid if the instrument has been repaired or tampered with by unauthorized third par-  
ties, or adjusted for faults or casual checking. The guarantee is valid only if all parts of the guarantee card  
have been filled in. Any instruments sent for repairs must be accompanied by their guarantee certificate.  
For all disputes the competent court is the Court of Padua.  
SIT CALIBRATION  
CENTRE N° 124  
DELTA OHM SRL  
VIA G. MARCONI, 5 - 35030 CASELLE DI SELVAZZANO (PD) - ITALY  
TEL. 0039-0498977150 r.a. - FAX 0039-049635596  
 
– 48 –  

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