Campbell 108, Инструкция по эксплуатации

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Model 108 Temperature Probe
10
snip examples increase settling time by 20000 µs by placing 20000 as the
argument in the SettlingTime parameter:
CR6-series datalogger example:
Therm108 ( T108_C,1,U1,U10, 20000 ,60,1.0,0.0 )
CR800-series and CR3000 dataloggers example:
Therm108 ( T108_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
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
Therm108() 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
Therm108()
are correct for the
desired units (Section 7.2 ,
Datalogger Programming
(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
as described in Section 8.3 , Electrically Noisy Environments
(p. 9)
, and
Section 8.4 , Long Cable Lengths
(p. 9)
. Ensure the clear wire is connected to
datalogger ground, and the datalogger is properly grounded.
9.2 Maintenance
The 108 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.
NOTE