Campbell Scientific 108-L Temperature Probe - Manual (Page 19)

Model 108 Temperature Probe
01: Excite-Delay (SE) (P4)
1: 1
Rep
2: 3 ±25 mV slow range ;CR23X,21X,CR7: 50 mV
3: 9 IN Chan
4: 3 Excite all reps w/EXchan 3
5: 2 Delay (units .01sec)
6: 1000 mV Excitation ;CR23X,21X,CR7: 2000 mV
7: 11 Loc [:Temp_C ]
8: .2 Mult ;CR23X,21X,CR7: 0.1
9: 0 Offset
02: Polynomial (P55)
1: 1
Reps
2: 11 X Loc [ Tmp108C ]
3: 11 F(X) Loc [ Tmp108C ]
4: -26.97 C0
5: 69.635 C1
6: -40.66 C2
7: 16.573 C3
8: -3.455 C4
9: .301
C5
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.
Verify the red wire is connected to the correct single-ended analog input
channel as specified by the measurement instruction and the purple wire is
connected to datalogger ground.
Symptom: Temperature is reported as NAN or –26.
Verify the black wire is connected to the switched excitation channel
specified by the measurement instruction.
Symptom: Incorrect temperature is reported.
Verify the multiplier and offset arguments in the measurement
instructions 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
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