Campbell Scientific HMP45C Temperature and RH Probe - Manual (Page 21)

Appendix A. Wiring for Older HMP45C
Probes
Color Description
Yellow Temperature Signal
Blue Relative Humidity Signal
Purple Signal Reference
Orange Power Control
Red Power
Black Power Ground
Shield Shield
FIGURE A-1. HMP45C Probe to Datalogger Connections
TABLE A-1. Connections for Single-Ended Measurements for Old Wiring Configuration
Color Description
CR10(X), CR510,
CR500
CR1000, CR3000
CR800, CR9000,
CR23X 21X, CR7
Yellow Temperature Single-Ended Input Single-Ended Input Single-Ended Input
Blue Relative Humidity Single-Ended Input Single-Ended Input Single-Ended Input
Purple Signal Reference AG
Orange Power Control Control Port Control Port Control Port
Red Power 12 V 12 V 12 V
Black Power Ground AG
Clear Shield G
A-1