Campbell Scientific HC2S3 Temperature and Relative Humidity Probe - Manual (Page 6)

Table of Contents
ii
Appendices
A. Absolute Humidity ..................................................A-1
A.1 Measurement Below 0°C................................................................. A-2
B. Changing the HC2S3 Settings ...............................B-1
B.1 HC2S3 Default Settings .................................................................. B-1
B.2 Software and Hardware Requirements ............................................ B-2
B.3 Changing the Temperature Range ................................................... B-2
B.4 Multiplier and Offsets for Temperature Range................................ B-3
C. HC2S3 Digital Communications ............................C-1
C.1 HC2S3 Digital Interface Specifications........................................... C-1
C.2 HC2S3 Communications Protocol................................................... C-1
C.3 RS-485 Communications using an MD485 RS-485 Interface......... C-3
C.4 RS-485 Communications using an SDM-SIO1 Serial I/O Module . C-5
Figures
4-1. HC2S3 and 41003-5 Radiation Shield on a tripod mast ...................... 3
4-2. HC2S3 and 41003-5 Radiation Shield on a CM200 Series Crossarm. 3
Tables
5-1. Recommended Lead Lengths .............................................................. 7
7-1. Connections for Single-Ended Measurements................................... 12
7-2. Connections for Differential Measurements...................................... 13
7-3. Temperature....................................................................................... 14
7-4. Humidity............................................................................................ 14
7-5. Wiring for Single-ended Measurement Examples............................. 14
7-6. Wiring for Differential Measurement Examples ............................... 18
A-1. Wiring for Vapor Pressure Examples .............................................. A-1