Campbell Scientific 43347 RTD Temperature Probe and 43502 Aspirated Radiation Shield - Manual (Page 17)

43347 RTD Temperature Probe, 43502 and 41003-5 Radiation Shields
'Define Data Tables
DataTable(Table1,True,-1)
DataInterval(0,60,Min,10)
Average(1,RTD_C,FP2,False)
Sample (1,43502_Tach,FP2)
EndTable
'Main Program
BeginProg
Scan(5,Sec,1,0)
'Measure 43347 (calibrated) probe and convert Rs/Rf to Rs
BrHalf4W(RTD_Res,1,mV250,mV250,1,1,1,2500,True,True,0,_60Hz,1000,0)
'Apply calibration coefficients (probe specific)
'43347 calibration T=-250.052585+(R*2.375187e-1)+(R^2*1.258482e-5)
RTD_Cal_C = -250.052585+(RTD_Res*2.375187e- 1)+((RTD_Res^2)* 1.258482e-5)
'Measure the 43502 tachometer output
PulseCount (Tach_Hz,1,11,0,1,1.0,0)
'Call Data Tables and Store Data
CallTable(Table1)
NextScan
EndProg
5.1.2 CR10X Example for Calibrated 43347-VX Probes
Because the Full Bridge w/mv Excit (P9) resistance is divided by 1000 (RF),
the coefficients given in Equation “T” can be entered into the polynomial
without exponents. C0 is entered as given, C1 is divided by .001, and C2 is
divided by .000001. For example:
Equation “T” from R.M. Young’s RTD Calibration Report:
T=
-250.052585
+Rx 2.375187E-01
+R
2 1.258482E-05
Scaled coefficients to be entered into Instruction 55:
C0
= -250.05
C1 = 237.52
C2 = 12.585
;{CR10X}
;
*Table 1 Program
01: 5
Execution Interval (seconds)
;Measure the 43347 probe, result = Rs/Rf
1: Full Bridge w/mv Excit (P9)
1: 1
Reps
2: 24 250 mV 60 Hz Rejection Ex Range ;CR23X (200 mV); 21X,CR7 (500 mV)
3: 24 250 mV 60 Hz Rejection Br Range ;CR23X (200 mV); 21X,CR7 (500 mV)
4: 1 DIFF Channel
5: 1 Excite all reps w/Exchan 1
6: 2500 mV Excitation ;CR23X (2000 mV); 21X,CR7 (5000 mV)
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