Campbell Scientific 109SS Temperature Probe - Manual (Page 18)

Model 109SS Temperature Probe
Therm109 (T109_C,1,1,1,20000,_60Hz,1.0,0.0)
Integration options and the settling time parameter are not
available for CR200(X) series dataloggers.
Edlog
In place of the AC Half Bridge (P5), use the Excite-Delay (SE) (P4)
instruction with a 20 ms delay to measure the probe, as shown in the following
example:
1: Excite-Delay (SE) (P4)
1: 1
Reps
2: 5 2500 mV Slow Range ;CR23X,21X,CR7: 5000 mV
3: 1 SE Channel
4: 1 Excite all reps w/Exchan 1
5: 2 Delay (0.01 sec units)
6: 2500 mV Excitation ;CR23X,21X,CR7: 5000 mV
7: 3 Loc [V_Vx ]
8: .0004 Multiplier
9: 0.0 Offset
9. Troubleshooting and Maintenance
All factory repairs and recalibrations require a returned material
authorization (RMA) and completion of the “Declaration of
Hazardous Material and Decontamination” form. Refer to the
Assistance page at the beginning of this manual for more
information.
9.1 Troubleshooting
Symptom: Temperature is reported as NAN, -INF, -9999, or -273.
Recheck wiring. Verify the red wire is connected to the correct single-
ended analog input channel as specified by the measurement instruction,
the black wire is connected to the switched excitation channel as specified
by the measurement instruction, and the purple wire is connected to
datalogger ground.
Symptom: Incorrect temperature is reported.
Verify the multiplier and offset arguments in the measurement instruction
are correct for the desired units (Section 7.2, Datalogger Programming).
Check the cable for signs of damage and possible moisture intrusion.
Symptom: Unstable temperature is reported.
Most likely a result of electromagnetic interference. Try using the 60 or
50 Hz integration options, and/or increasing the settling time as described
in Section 8.3, Electrically Noisy Environments, and Section 8.4, Long
Cable Lengths. Make sure the clear shield wire is connected to datalogger
ground, and the datalogger is properly grounded.
NOTE
NOTE
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