Campbell Scientific 43347 RTD Temperature Probe and 43502 Aspirated Radiation Shield - Manual (Page 27)

Appendix A. Example CR10(X) Program
for Ice Bath Calibration
The following program can be used to calibrate 43347 probes (probes ordered
without the 3-point RM Young calibration) for users wanting better than
±0.3°C. The calibration computes a multiplier for the P9 measurement
Instruction (Section 5.2, Programming for Uncalibrated 43347-VX Probes).
Procedure:
Immerse the stainless steel tip of the 43347 probe in a properly prepared ice
bath
1 and allow the temperature to stabilize (about an hour). Program the
CR10X with the program listed below. Toggle Flag 1 high, which causes the
43347 probe to be measured 100 times. The average of the measurement result
is placed into input location 2 and the reciprocal of location 2 is placed into
input location 3. The value from location 3 is used as the multiplier for the P9
Instruction (Section 5.2, Programming for Uncalibrated 43347-VX Probes).
Typical values for locations 2 and 3 would be 1.0012 and 0.998 respectively.
;{CR10X}
;
*Table 1 Program
01: 1
Execution Interval (seconds)
1: If Flag/Port (P91)
1: 21
Do if Flag 1 is Low
2: 0 Go to end of Program Table
2: Z=F (P30)
1: 0
F
2: 0 Exponent of 10
3: 1 Z Loc [ counter ]
3: Beginning of Loop (P87)
1: 1
Delay
2: 100 Loop Count
4: Full Bridge w/mv Excit (P9)
1: 1
Reps
2: 24 250 mV 60 Hz Rejection Ex Range
3: 24 250 mV 60 Hz Rejection Br Range
4: 1 DIFF Channel
5: 1 Excite all reps w/Exchan 1
6: 2500 mV Excitation
7: 2 Loc [ result ]
8: 1.0 Mult
9: 0 Offset
5: Z=Z+1 (P32)
1: 1
Z Loc [ counter ]
A-1