Nautel VS300, Operation And Maintenance Manual

Page: 217 / 229

VS300 Operations and Maintenance Manual Routine maintenance
Page 3-4 Issue 8.0 2016-03-01
Replacing the exciter/control PWB battery
Replace the battery on the exciter/control PWB (A1) once a year, or whenever the
Controller - Low
Battery
alarm appears (on the front panel UI or via remote AUI). Chemical leakage from an old
battery can cause damage. Also, the exciter/control PWB’s microcontroller may not retain its settings
if ac power is turned off while the backup battery power is low. The battery should be replaced while
ac power is applied to the transmitter.
Interval
Every 12 months.
Parts and tools
Replacement battery: 3 V lithium coin cell, 20 mm (Panasonic # CR2032 or equivalent).
Procedure
Perform the following steps to replace the battery:
1. Ensure ac power is being applied to the transmitter.
2. Gain access to the exciter/control PWB (A1) by removing the transmitter’s top cover.
3. Replace battery BT1 on the exciter/control PWB. See Figures MD-1 and MD-2 in the
mechanical drawings section at the end of the VS300 Troubleshooting Manual to locate the
exciter/control PWB (A1) and its battery (BT1).
4. Re-install the transmitter’s top cover.
5. Check for any alarms on the front panel UI or remote AUI. Battery related alarms should
clear. (See “Viewing transmitter status” on page 2-68 .)
Note:
The exciter/control PWB’s battery is used only for the RTC clock (clock, logs, and RDS clock
information, if used). If the battery fails and an ac power loss occurs, the state prior to the ac loss is
retained; the transmitter recovers to the same preset, local/remote mode, and RF on/off mode (these
settings are stored in EEPROM). Reset the clock(s) and note that any logged events that occurred
before replacing the battery will be reflected by the time error.