Campbell Scientific UT20 and UT30 Tower-based Weather Stations - Manual (Page 69)

UT20 and UT30 Tower-based Weather Stations
E. Check the cable(s) between the serial port and the modem. If cables have
not been purchased through Campbell Scientific, check for the following
configuration using an ohm meter:
25-pin serial port:
computer end modem end
2
2
3 3
7 7
20 20
9-pin serial port:
computer end modem end
2
3
3 2
4 20
5 7
F. Make sure the modem is properly configured and cabled (Section 8.3,
Communication and Data Storage Peripherals).
G. If still no response, call Campbell Scientific.
9.2.3 NaN Displayed in a Variable
A. Make sure the battery voltage is between 9.6 and 16 Vdc.
B. Verify the sensor is wired to the analog channel specified in the
measurement instruction or Short Cut .FSL file.
C. Make sure the Range parameter in the measurement instruction covers the
full scale voltage output by the sensor.
9.2.4 Unreasonable Results Displayed in a Variable
A. Inspect the sensor for damage and/or contamination.
B. Make sure the sensor is properly wired to the datalogger.
C. Check the multiplier and offset parameters in the measurement
instruction.
10. Standard Software Installation
Software required for a weather station consists of the datalogger program and
a datalogger support software suite for Windows.
10.1 Datalogger Program
The datalogger program operates the weather station. It programs the
datalogger to measure sensors, process the measurements, and store data in the
datalogger’s memory. The datalogger program is most easily created using
Short Cut. A separate manual covers the use of Short Cut in detail.
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