Nautel NV30LT-N, Руководство по эксплуатации и техническому обслуживанию

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NV30LT-N OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE
PAGE 3.3.2 VERSION 0.1 2015-03-01
2. Clean the NV30LT-N using a vacuum cleaner and a soft-bristle brush to remove loose dirt. Clean,
damp rags should be used to remove dirt that cannot be removed with a vacuum cleaner. Never
use compressed air to clean the NV30LT-N.
Checking Hardware
All hardware must be checked at least once a year. Thermal cycling from turning the NV30LT-N on and
off will require more frequent checks.
 To prevent damaging the hardware, ensure that the proper sized tools are used. In most cases,
hardware is metric.
 A mounting surface or terminal that has changed colour indicates a loose hardware connection.
 Check and, if necessary, retorque the ac input cables on terminal block TB1. See Section 2.5,
“Connecting Ac Power” on page 2.5.1 of the NV30LT-N Installation Manual to determine specific
torque values.
Battery Replacement
The controller assembly contains a battery backup circuit that provides a memory of the transmitter
time setting during ac power failure. See
“Replacing the Controller Assembly’s Battery” on page 3.3.6 .
The optional exciter’s exciter/control PWB also contains a battery backup circuit, which will indicate a
‘low battery’ alarm when its voltage is below a pre-determined threshold. The backup battery in the
controller assembly is the only battery required for the transmitter. If you get a ‘low battery’ alarm on
the exciter, remove the battery as detailed in
“Removing the Exciter’s Battery” on page 3.3.8 , but do not
replace it.