Campbell-scientific 109SS Temperature Probe Manual de usuario descargar pdf (Pagina 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

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