Campbell-scientific 3WHB10K 3-Wire Half-Bridge Terminal Input Module Manual de usuario descargar pdf (Pagina 9)

3WHB10K 3-Wire Half Bridge Terminal Input Module

4.4 CR9000X

'CR9000X Datalogger

Public RS_Ro, Temp_F

DataTable (Temp_F,1,-1)

DataInterval (0,0,0.10)

Sample (1,Temp_F,FP2)

EndTable

BeginProg

Scan (1,mSec,0,0)

BrHalf3W (Rs_Ro,1,V50,5,1,6,1,1,4200,True,30,40,100,0)

PRT (Temp_F,1,Rs_Ro,1.8,32)

CallTable Temp_F

NextScan

EndProg

4.5 CR1000

'CR1000 Series Datalogger

Public Rs_R0, Temp_C

DataTable (Hourly,True,-1)

DataInterval (0,60,Min,0)

Average (1,Temp_C,IEEE4,0)

EndTable

BeginProg

Scan (1,Sec,0,0)

BrHalf3W (Rs_R0,1,mV25,1,Vx1,1,2100,True ,0,250,100,0)

PRT (Temp_C,1,Rs_R0,1.0,0)

CallTable Hourly

NextScan

EndProg

5. 100 Ohm PRT in 3 Wire Half Bridge

The advantages of the 3-wire half bridge over other measurements that correct

for lead wire resistance such as a 4-wire half bridge, are that it only requires 3

lead wires going to the sensor and takes 2 single-ended input channels,

whereas the 4-wire half bridge requires 4 wires and 2 differential channels.

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Campbell-scientific 3WHB10K 3-Wire Half-Bridge Terminal Input Module Manual de usuario Pagina 9