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VS300 Operations and Maintenance Manual
Routine maintenance
Page 3-2
Issue 0.1  2011-03-11
Checking hardware
All hardware must be checked at least once a year. Nautel recommends more frequent checking if the 
VS300 is subjected to above average thermal cycling, caused by turning the VS300 on and off.
To prevent damaging the hardware, ensure that the proper size tools are used. In most cases, 
hardware is metric.
A mounting surface or terminal that has changed colour indicates a loose hardware 
connection.
Battery replacement
The VS300's exciter/control PWB contains a battery backup circuit that allows the time and date to 
update during ac power failure. The battery should be replaced every 12 months. See