Irradian PR203 User manual
Handbook Ref. No. IH005/Issue D
Issue Date: 01/11/2013
1 Introduction
2 Front Panel Controls
3 Operation
4 Special Function Modes
5 Care and Maintenance
6 Battery Replacement
7 Environmental Care, Recycling and Disposal
PR203 Radiometer Irradian Limited
1
The Irradian portable phototherapy radiometer (model PR203) is
designed specifically to measure the spectral irradiance of blue light
sources which are used for the treatment of hyperbilirubinaemia in new
born babies.
The radiometer comprises of a hand held, battery operated display unit, a
small detector and a connecting cable.
The detector is carefully constructed to give an optical response that
closely matches the absorption curve of bilirubin; that prevents the
measurement of non-therapeutic light and that allows accurate
measurements of three different types of light sources, where ever they
are placed with respect to the radiometer. The sensor used in the
detector is a silicon photodiode which performs with excellent linearity
and long term stability.
Note the PR203 radiometer is not an ultra violet radiometer and
should not be used to measure the output of ultra violet lamps such
as those often used in ultra violet phototherapy treatment.
Irradian Limited PR203 Radiometer
2
PR203 DISPLAY UNIT
PR203 Radiometer
DETECTOR RS232
Figure 1
4½ digit LCD display
MODE select button
Display backlight button
FUNCTION RESET button
Background ZERO button
HOLD/RUN function button
RESET button
Power switch button
Auto/manual RANGE button
Computer connection
SOURCE select button
Detector connection
The battery compartment cover is at the rear of the display unit.
PR203 Radiometer Irradian Limited
3
(continued):
BUTTON AND CONNECTOR DESCRIPTIONS
Turns the display backlight on and off.
The display backlight will turn off automatically
after 60 seconds.
ZERO Starts a zero or background measurement.
RESET Press to return to the normal measurement
mode from either the manual range or special
function modes.
Note the display hold is not reset.
RANGE Selects either auto ranging or manual range
control. In manual range control, repeated button
pressing steps through the gain ranges.
SOURCE Select between the three measurements of
irradiance from different light sources;
Halogen, Fluorescent or LED (Light Emitting
Diode) in spectral irradiance units (µW/cm
2
/nm).
MODE Select between the Average, Min, Max and
Integrate special function modes.
FUNCTION RESET Press to reset the function mode values to zero.
HOLD/RUN Press to hold the current reading.
Press again to release the held readings.
Press to run or hold a special function mode.
Turns the power on and off.
Connector Computer interface connection (5 pin RS232).
(optional radiometer-computer interface cable).
Connector Detector connection (8 pin).
Irradian Limited PR203 Radiometer
4
SWITCHING ON
1) With the unit initially OFF, plug the detector 8 pin connector into the
detector socket
on the top of the display unit.
2) Clean the white diffuser on the top of the detector if it looks marked or
dirty (see Section 5, CARE AND MAINTENANCE).
3) Press and release the power button
on the PR203 display key pad.
The radiometer will start, with the display briefly showing:-
The radiometer will now automatically search for the correct range to
use with the current light levels.
A typical display is shown:-
On the front panel, one LED will indicate the measurement units and
another, which light source is currently selected (Halogen,
Fluorescent or LED). This will be the same as that last selected when
the radiometer was switched off.
4) Press and release the SOURCE button
to select the correct source
required. For incandescent sources the correct setting is ‘Halogen’.
For irradiance measurements with a fluorescent tube, the correct
setting is ‘Fluorescnt.’ and with a blue dominant wavelength LED the
correct setting is ‘LED’.
PR203 Radiometer Irradian Limited
5
(continued):
5) The radiometer should be zeroed regularly to remove the unwanted
background level. First, place the supplied blanking cap over the
detector diffuser. Then press and release the ZERO button
.
Whilst the zero is being taken, the display will show:-
6) The radiometer measures the background level on each of the gain
ranges and stores these values in memory. All further measurements
will subtract these values before displaying the correct measurement.
At the end of the zero sequence the display will show:-
7) Remove the blanking cap from the front of the detector. The
radiometer is now ready for use.
Irradian Limited PR203 Radiometer
6
AVERAGE MODE
When the light source is unstable, press and release the MODE button
to switch to average mode. The radiometer will switch to manual
ranging with the Manual LED on. The Average LED will also switch on,
the SOURCE LED will remain unchanged.
To begin to average the readings, press and release the HOLD/RUN
button
. Initially the display will show a fluctuating signal, reflecting the
light source fluctuations. After a short time the amplitude of the
fluctuations will decrease and the display will begin to show a reading
which represents the average light level during the period of the
measurement.
At any time the averaging process can be stopped by pressing the
HOLD/RUN button
. The display will flash ‘HOLd’ intermittently.
At any time the averaging sequence can be reset by pressing and
releasing the FUNCTION RESET button
.
If the light level fluctuations are large and any one reading causes the
detector amplifier to overload at this range the averaging process will be
terminated and the display will show:-
To avoid an overload condition, RESET the radiometer (button
) and
manually change the RANGE (button
) to a lower lever. e.g. from a
34.00 range to the 34.0 less sensitive range.
PR203 Radiometer Irradian Limited
7
(continued):
MAXIMUM AND MINIMUM LEVELS
During an average measurement sequence the maximum and minimum
values attained in the period are recorded. Press the HOLD/RUN button
to stop the averaging sequence. Press the MODE button
to select
between Average, Min, Max and Integrate. Note the integrate display
may overload and show - 0 L -.
It is also possible to view a Min or Max recording sequence by selecting
Min or Max before selecting RUN.
Press FUNCTION RESET
to set the Max, Average and Integrate
values to zero and the Min to - 0 L -. Note the FUNCTION RESET button
still operates whilst in a measurement sequence or in the HOLD mode.
INTEGRATE MODE
For measurements of the integrated dosage or exposure, press the
MODE button
to select Integrate. Press the HOLD/RUN button
to
start the measurement.
Note because the meter is set into a manual gain range for this
measurement, the detector amplifier will not autorange, so as with
Average measurements, if the amplifier overloads at any time the display
will show - 0 L - and the measurement will halt.
The units for the integrated measurements are µJ/cm²/nm.
At the end of the integration period HOLD the display (button
)
. Use
the MODE button
to also display the Min,Max and Average values.
Press FUNCTION RESET (button
) to return the Integrate, Max and
Average values to zero and the Min to - 0 L -. Note the FUNCTION
RESET (button
) will also operate during a measurement sequence or
in the HOLD mode.
Irradian Limited PR203 Radiometer
8
CLEANING AND GENERAL HANDLING
1) The PR203 radiometer can be cleaned using a moist cloth with
detergent. Do not use solvent or alcohol to clean surfaces.
Cable
Diffuser
Figure 2
2) The white diffuser on the top of the detector should be kept clean at all
times. Only use solvent or alcohol to clean this surface.
3) The radiometer is a precision instrument, protect from shocks,
extremes of temperature and humidity etc.
4) Avoid supporting the detector by the connecting cable.
5) The display unit and detector are not waterproof. Do not immerse
either in water.
PR203 Radiometer Irradian Limited
9
REMOVAL AND REPLACEMENT PROCEDURE
1) Switch off the radiometer
before changing or checking the battery.
2) Slide open the battery compartment cover located on the back of the
radiometer (Figure 3) and carefully lift out the battery.
Calibration Label
Model / Serial Number Label
Slide cover down to open
Figure 3
3) Measure the voltage across the battery clip terminals. If it is less than
7.0 volts the battery must be changed.
4) If the battery needs replacing, disconnect the battery carefully from the
battery clip.
5) Replace with a new, size PP3, 9 volt battery.
6) Re-connect the new battery to the battery clip. Replace the battery
inside the battery compartment with the battery clip to the left of the
battery, wires pointing up and slide the cover closed.
7) Note it will be necessary to switch the radiometer on and off once
before normal operation will commence again.
Irradian Limited PR203 Radiometer
10
The purpose of the European Commission WEEE directive (Waste
Electrical and Electronic Equipment; 2002/96/EC) is to ensure that
electrical and electronic products are recycled using the best treatments,
recovery and recycling techniques that are currently available. This is so
that high health standards and a lasting environmental protection can be
achieved and maintained.
This product has been designed and manufactured using high quality
materials and components, many of which can be recycled and reused.
Please remember to observe the local regulations that govern both the
disposal of the packaging materials accompanying this product and any
used batteries.
DO NOT DISPOSE OF THIS PRODUCT IN YOUR
GENERAL WASTE BIN.
Please inform yourself about your local WEEE collection
system which is available for electrical and electronic
products that are marked with the symbol shown here.
When disposing of this meter, please use one of the following options:
1) Use your local designated WEEE collection facilities to dispose of the
complete product (including cables, detectors, filters & accessories).
2) Return the complete product back to Irradian, marking it clearly as
intended for WEEE disposal.
!
! !
!
9 Elphinstone Road Telephone: +44 (0)1875 898-083
Tranent Facsimile: +44 (0)1875 616-528
Scotland EH33 2LG Web: www.irradian.co.uk
Other manuals for PR203
1
Table of contents
Other Irradian Measuring Instrument manuals
Irradian
Irradian PR203 Instruction Manual
Irradian
Irradian UV203-3 User manual
Irradian
Irradian PM203 Instruction Manual
Irradian
Irradian L203 SMU User manual
Irradian
Irradian L203 Instruction Manual
Irradian
Irradian UV203 Instruction Manual
Irradian
Irradian PR450 Instruction Manual
Irradian
Irradian UV201 Instruction Manual
Irradian
Irradian L202PMS Instruction Manual
