3.1 Optical specifications
Accuracy:
±0.2 cd/m
2
< 2 cd/m
2
, ±10% > 2 cd/m
2
Field of view:
6°
Spectral response:
CIE 1931
Measurement range:
0 to 45,000 cd/m
2
Resolution:
0.1 cd/m
2
3.2 Electrical specifications
Minimum
value
Nominal
value
Maximum
value
Main power supply for DSP and dew heater
Power supply, DC only
9 V
12 V
30 V
Current consumption, sampling continuously (at 12 V)
5 mA
7 mA
9 mA
Current consumption, sampling continuously with dew
heater active (at 12 V)
90 mA
95 mA
100 mA
Hood heater power supply
Hood heater voltage (AC or DC)
–
24 V
30 V
Hood heater power (at 24 V AC or DC)
–
48 W
55 W
3.3 Communications specifications
Supported serial setting:
8 bits, no parity, 1 stop bit (default)
Supported data rates:
1200 baud
38400 baud (default)
2400 baud
57600 baud
9600 baud
115200 baud
19200 baud
Supported standards:
RS-232 (full duplex, no hardware handshaking)
RS-485 half duplex
CS140 Background Luminance Sensor
3
