Campbell AVW1 Manual do Utilizador Página 9

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CR10 and VW Sensors, 2002/12/18 7
Instruction 4
for Thermistors and RTDs
Reading Thermistors
1. Use instruction 4 to read the thermistor.
02 - Range Option: Enter 25 (60 Hz rejection, 2500 mV
range)
05 - Delay (units .01 sec): Enter 1
06 - mV Excitation: Enter 2500
08 - Mult: Enter .001
09 - Offset: Enter 0
2. Then use instruction 55 to apply factors to convert the read-
ing to °C.
04 - C0: Enter -104.78
05 - C1: Enter 378.11
06 - C2: Enter -611.59
07 - C3: Enter 544.27
08 - C4: Enter -240.91
09 - C5: Enter 43.089
Reading the RTD
1. Use instruction 4 to read the RTD.
02 - Range Option: Enter 25 (60 Hz rejection, 2500 mV
range)
05 - Delay (units .01 sec): Enter 2
06 - mV Excitation: Enter 2500
08 - Mult: Enter .001
09 - Offset: Enter 0
2. Then use instruction 55 to apply factors to convert the read-
ing to °C.
04 - C0: Enter 2412.6
05 - C1: Enter -3442.5
06 - C2: Enter 1904.4
07 - C3: Enter -435.97
08 - C4: Enter 0
09 - C5: Enter 0
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