Nautel NV7.5, Руководство по эксплуатации и обслуживанию

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NV10/NV7.5 Operations and Maintenance Manual Routine maintenance
Page 3-2 Issue 3.4 2016-08-03
2. Clean the NV10/NV7.5 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 NV10/NV7.5.
3. Clean the 17-inch LCD monitor on the front door as follows:
– Open the transmitter’s front door and gain access to the rear of the LCD monitor.
– Remove the cover that protects the connectors at the bottom of the LCD monitor,
noting it is secured using seven M4 nuts, split washers and flat washers. Retain
hardware.
– Disconnect the round, black
DC INPUT
plug from the bottom, left of the monitor.
This removes power from the monitor, which makes it easier to see dirty or oily
areas on the screen and also prevents any inadvertant touch-screen operation.
– Use a dry, soft microfiber cloth and very gently wipe the screen. Do not press hard
in an attempt to scrub off dirt or oil. If necessary, dampen the cloth with distilled
water
– When complete, reconnect the
DC INPUT
plug to the monitor and re-install the
cover.
Checking hardware
All hardware must be checked at least once a year. Thermal cycling from turning the NV10/
NV7.5 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.
• Ac input cables installed on terminal block TB1 must be checked and, if necessary,
retorqued. See Section 4, Connecting Ac Power of the NV10/NV7.5 Installation Man-
ual to determine specific torque values.
Battery replacement
The NV10/NV7.5's control/interface PWB contains a battery backup circuit that provides a
memory of transmitter alarm occurrences during ac power failure. See “Replacing the control/
interface PWB battery” on page 3-6 .
Each exciter’s (A or B) NVE exciter PWB contains a battery backup circuit that provides a
memory of exciter alarm occurrences during ac power failure. See “Replacing the NVE exciter
PWB battery” on page 3-7 .