Campbell CRVW3, Инструкция по эксплуатации

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CRVW3 3-Channel Vibrating-Wire Datalogger
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When using the –ALK option, the D-cells on the device should be replaced
about once every 12 months. This may be needed more frequently if the
–RF451 or –RF407 radio is used, or if measurements are made more frequently
than once every 15 minutes. When using the –RC option, consider replacement
of the rechargeable battery after several years of use.
12.1.2 Sensor Spectrum Checks
You should periodically verify that the CRVW3 is making proper readings
from its sensors. During installation or during on-site maintenance, this can be
done using the Troubleshoot tab in DevConfig (see Section 8.1.6 , Testing the
Measurement Operation of the CRVW3
(p. 27)
, and Section 8.2.8.2 , Validation
with DevConfig
(p. 47)
. There is a way to make a similar spectrum check on a
CRVW3 using LoggerNet and a remote connection (i.e., if the device has a
radio option). The creation of a binary file can be triggered, and then that file
can be retrieved to the LoggerNet computer station using File Control .
DevConfig can then be used to view the spectrum and diagnostic contents
associated with that file. In this way, you can see the spectrum information on a
remote CRVW3 without making a field-visit.
Follow this process to check the spectrum on a remote CRVW3 station:
1. Use
Connect Screen
to establish a connection to the CRVW3 station of
interest.
2. Open the Status table in the Table Monitor dropdown.
3. Set the Channel_Diag value to match the channel to be tested (1, 2 or 3).
4. Set the Low Frequency and High Frequency desired (in Hz) for the
measurement using the Begin_Freq_Diag and End_Freq_Diag fields.
5. Set the excitation level for the measurement using Excitation_Opt_Diag .
Use 120 for 12 V, 50 for 5 V and 20 for 2 V excitation.