Instruction manual

Model 109SS Temperature Probe

For CR6 datalogger:

Therm109(T109_C,1,U1,U10,20000,_60Hz,1.0,0.0)

For CR800, CR1000, CR3000, and CR5000 dataloggers:

Therm109(T109_C,1,1,1,20000,_60Hz,1.0,0.0)

A setting time parameter is not available for CR200(X) series dataloggers.

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, or incorrect temperature.

Verify wire leads are connected to the terminals specified in the

Therm109() instruction: red to single-ended analog input (SE or U), black

to switched excitation (VX/EX or U), and purple to ground ( ).

Symptom: Incorrect temperature is reported.

Verify the Mult and Offset arguments in

Therm109() 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.

Probably a result of electromagnetic interference. Try using the _50Hz or

_60Hz Integ or Fnotch options, and/or increasing the settling time as

described in Section 8.3, Electrically Noisy Environments, and Section 8.4,

Long Cable Lengths. Ensure the clear wire is connected to datalogger

ground, and the datalogger is properly grounded.

9.2 Maintenance

The 109SS probe requires minimal maintenance. For air temperature

measurements, check the radiation shield monthly to make sure it is clean and

free from debris. Periodically check cabling for signs of damage and possible

moisture intrusion.

9.3 Calibration

Calibration of the 109SS probe is not necessary unless the application requires

removal of the thermistor interchangeability offset described in Section 6,

Specifications.

NOTE