Campbell Scientific CR5000 Measurement and Control Module - Manual (Page 127)

7-1
Section 7. Measurement Instructions
7.1 Voltage Measurements
VoltDiff – Differential Voltage Measurement............................................. 7-3
VoltSE – Single-ended Voltage Measurement ............................................ 7-3
7.2 Thermocouple Measurements
Measure the Output of Thermocouples and Convert to Temperature.
TCDiff – Differential Voltage Measurement of Thermocouple .................. 7-3
TCSE – Single-ended Voltage Measurement of Thermocouple.................. 7-4
Resistance Bridge Measurements
Bridge measurements combine an excitation with voltage measurements and
are used to measure sensors that change resistance in response to the
phenomenon being measured. These sensors include RTDS, thermistors,
potentiometers, strain gages, and pressure and force transducers.
7.3 Half Bridges
BrHalf – Half Bridge ................................................................................... 7-5
BrHalf3W – Three Wire Half Bridge .......................................................... 7-6
BrHalf4W – Four Wire Half Bridge............................................................ 7-6
7.4 Full Bridges
BrFull – Four Wire Full Bridge ................................................................... 7-8
BrFull6W – Six Wire Full Bridge ............................................................... 7-9
7.5 Current Excitation
Resistance - Measures Resistance or Full Bridge with Current
Excitation........................................................................................... 7-11
7.6 Excitation / Continuous Analog Output
ExciteCAO - Sets the voltage of a Continuous Analog Output channel ... 7-13
ExciteI - Sets the specified current excitation channel to the current
specified............................................................................................. 7-14
ExciteV - Sets the specified switched voltage excitation channel to the
voltage specified ................................................................................ 7-14
7.7 Self Measurements
Battery – Measures Battery Voltage or Current ........................................ 7-15
PanelTemp – (Used as a Reference for Thermocouple Measurements) .... 7-15
Calibrate – Adjusts the Calibration for Analog Measurements ................. 7-16