Model 107 Temperature Probe
10
CR6-series datalogger example:
Therm107
(
T107_C,1,U1,U10,
20000
,60,1.0,0.0
)
CR800-series and CR3000 dataloggers example:
Therm107
(
T107_C,1,1,1,
20000
,_60Hz,1.0,0.0
)
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
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
Therm107()
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
Therm107()
are correct for the
(p. 5)
). 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 50 Hz or
60 Hz options for the
Fnotch
parameter, and/or increasing the settling time
Electrically Noisy Environments
(p. 9)
, and
(p. 9)
. Ensure the clear wire is connected to
datalogger ground, and the datalogger is properly grounded.
9.2 Maintenance
The 107 probe requires minimal maintenance. For air temperature
measurements, check the radiation shield monthly to make sure it is free from
dust and debris. To clean the shield, first remove the sensor. Dismount the
shield. Brush all loose dirt off. If more effort is needed, use warm, soapy water
and a soft cloth or brush to thoroughly clean the shield. Allow the shield to dry
before remounting.
Periodically check cabling for signs of damage and possible moisture intrusion.
9.3 Calibration
If needed, an estimate of the interchangeability error for 0 to 50 °C, that can be
used as the
Offset
parameter of the
Therm107()
instruction, can be determined
with a 1-point or 2-point calibration. Calibration of the 107 probe is not
NOTE
