Irradian Limited
PR203 Radiometer
2
DISPLAY UNIT
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
8 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.
Display illumination:
A LED back light can be switched on to
illuminate the display for readings in low
ambient light situations.
Power Supply:
9 volt PP3 type battery.
Power Consumption:
Shut down mode
<5µA
Operating
10 - 20mA
LED back light
~20mA
Battery Life
~ 50 hours without backlight use