Irradian UV203 Instruction Manual

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Handbook Ref No. MH064/Issue K
File Ref: UV203V5K.doc

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    
        
    1. Introduction
2. Specification
3. Operation
4. Irradiance Measurements
5. Cosine Angular Response
6. Calibration Description
7. Care and Maintenance
8. Optional Accessories
9. Block Diagram
10. Programming via the RS232 interface
11. Environmental care, recycling and disposal

UV203 Radiometer Irradian Limited
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The Irradian portable digital UV radiometer model UV203 is a versatile
direct reading instrument designed specifically for measuring UV
irradiance. It is supplied with a GaAsP solid state detector and a choice
of up to three screw in filters to enable measurements to be made across
the ultra-violet spectrum.
This instrument is especially useful for monitoring the ultra-violet
emissions from high and low pressure mercury vapour lamps, metal
halide lamps and ultra violet fluorescent lamps. Other applications
include the measurements of germicidal lamps used for sterilization,
PUVA lamps used in phototherapy or monitoring industrial ultra-violet
lamps used in the curing of inks & adhesives.
Listed below are some of the standard models available:
MODEL
UV203: UV203 with detector and three filter rings
DET203UV Detector /amplifier
UVA-Cos
UVB2-Cos
IF-254
UV203 A: UV203 with detector and filter ring
DET203UV Detector /amplifier
UVA-Cos
UV203 B: UV203 with detector and filter ring
DET203UV Detector /amplifier
UVB2-Cos
UV203 AB: UV203 with detector and filter ring
DET203UV Detector /amplifier
UVAB-Cos
UV203-254: UV203 with detector and filter ring
DET203UV Detector /amplifier
IF-254
UV203 A+B UV203 with detector and two filter rings
DET203UV Detector /amplifier
UVA-Cos
UVB2-Cos

Irradian Limited UV203 Radiometer
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DISPLAY UNIT UV203
Controller: 80C51 8bit micro-processor with a 3.1684MHz
clock.
Memory On board non volatile RAM for calibration
factors and set-up parameters.
Key Operation 7 switch key board with 11 LED indicators.
Power Switch Microprocessor reset at switch on.
Unit settings stored prior to shut down.
Serial Interface Three wire RS232 serial interface.
4800 baud, no parity, 1 stop bit.
Integration Time 0.33s
Conversion Scale 17 bit
Accuracy: Measurement accuracy ±1digit with a
linearity error of <1%.
Display: 4½ digit lcd display. Character height 10mm.
Power Supply: 9 volt PP3 battery.
Power Consumption: Shut down mode <5µA
Operating 10 - 20mA
Battery Life ~ 50 hours.

Irradian Limited UV203 Radiometer
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    (continued): 
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Ranges: Each of the filter rings have up to six ranges according to
the table below:
Note the UV203A,UV203B, UV203-254 and UV203AB
are supplied with only one filter ring.
Model UV203 A + B is supplied with two filter rings.
Full Scale \ Filter Ring UVA UVB2 IF-254 UVAB
1.9999 mW.m
-2
19.999 mW.m
-2
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199.99 mW.m
-2
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1999.9 mW.m
-2
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19.999 W.m
-2
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199.99 W.m
-2
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1999.9 W.m
-2
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19999 W.m
-2
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19999 x10 W.m
-2
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Calibration Type: Standard Standard Mercury Standard
Note: Other filter rings and ranges are available on request.
Standard Calibration: The radiometer with detector and filter rings is
calibrated at the peak response of each filter ring
using a monochromatic source. The calibration
plane is at the front of the filter face.
Mercury Calibration: The radiometer with detector and filter rings is
calibrated at a wavelength corresponding to a
mercury emission line. The calibration plane is
34 mm back from the front of the filter face,
corresponding to the position of the photodiode.
Spectroradiometric Cal. The radiometer with detector and filter rings is
calibrated to match the measurement of a
spectroradiometer on a particular source.
Accuracy Absolute calibration accuracy ±7.5% traceable
to NPL standards.

Irradian Limited UV203 Radiometer
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    (continued):
Front Panel Controls:
RANGE Select auto ranging or manual range control.
UNITS Select between UVA or UVB to match the
filter ring fitted to the detector.
Select AUX for the IF-254 filter ring or special
filter rings / accessory if fitted.
ZERO Initiates a zero or background measurement
routine on all gain ranges.
HOLD/RUN Display is held at present reading until HOLD
button is pressed again.
Select to run or hold a special mode.
MODE Select between, AVERAGE, MIN, MAX and
INTEGRATE modes. Press RESET to return
to normal measurement mode.
FUNCTION/RESET Press to reset function values to zero
RESET Press to return to normal measurement mode
from Manual range control or special modes.
Note the display hold is not reset.
 Power on / off button
Connectors: 8 pin DIN type detector connector.
5 pin DIN type RS232 connector.
Temperature Range: 0 to 40°C. 80% RH.
Dimensions: 150 x 80 x 45mm.
High impact polystyrene.
Weight: 350g

Irradian Limited UV203 Radiometer
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    (continued):
LABORATORY DETECTOR, Model DET203UV
Amplifier PCB Photodiode
Cable
Accessory Mounting Thread
The DET203UV laboratory detector comprises of an aluminium housing,
photodiode and PCB assembly.
Detector: 21mm² GaAsP photodiode.
Responsivity: Excluding filter rings. Figure 1
Temperature Coefficient: -0.10 %/°C
Amplifier Gain 10
9
V/A to 10
3
V/A
Current to Frequency 0 - 0.5Mhz
Linearity Error: <1% across ranges
Temperature Range: Operation: -10 to +60°C
Storage: -20 to +70°C
Detector Housing: Black anodised aluminium alloy housing.
Each optical accessory screws into the detector
housing on a 1.125" x 20 T.P.I.
Cable: 1 metre cable to 8 pin DIN type connector

Irradian Limited UV203 Radiometer
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    (continued):
Laboratory Detector DET203UV Responsivity (A/W)
Figure 1