Campbell Scientific CS500-L Temperature and Relative Humidity Probe - Manual (Page 10)

CS500 Temperature and Relative Humidity Probe
6
TABLE 1. Datalogger Connections
Description Color CR23X/CR1000 CR10(X), CR510 21X, CR7
Temperature Black Single-Ended Input Single-Ended Input Single-Ended Input
Relative Humidity Brown Single-Ended Input Single-Ended Input Single-Ended Input
Signal & Power
Reference
Green G G
Power Red 12 V 12 V 12 V
Shield Clear G
4. Wiring
Connections to Campbell Scientific dataloggers are given in Table 1. The
probe is measured by two single-ended analog input channels, one for
temperature and one for relative humidity.
Always connect the Green lead to the datalogger first,
followed by the Black, Brown, and Clear leads. Connect
the Red (Power) lead last.
5. Example Programs
This section is for users who write their own datalogger programs. A
datalogger program to measure this sensor can be created using Campbell
Scientific’s Short Cut Program Builder Software. You do not need to read this
section to use Short Cut.
The temperature and relative humidity signals from the CS500 are measured
using two single-ended analog measurements (Instruction 1).
The probe output scale is 0 to 1000 millivolts for the temperature range of -
40
°C to +60°C and for the relative humidity range of 0 to 100%. Tables 2 and
3 provide calibration information for temperature and relative humidity.
TABLE 2. Calibration for Temperature
Units Multiplier
(degrees mV
-1
)
Offset
(degrees)
Celsius 0.1 -40
Fahrenheit 0.18 -40
TABLE 3. Calibration for Relative Humidity
Units Multiplier
(% mV -1 )
Offset
(%)
Percent 0.1 0
Fraction 0.001 0
CAUTION