Nautel VSHD Exciter, Инструкция по эксплуатации

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VSHD Exciter Technical Instruction Manual
Page 4-1
Section 4 Maintenance Issue 2.0
VSHD Exciter
TECHNICAL INSTRUCTIONS
Section 4 MAINTENANCE
4.1 GENERAL
This section contains maintenance information for the VSHD Exciter.
4.2 BATTERY REPLACEMENT
The VSHD`s exciter PWB (A1) contains a battery backup circuit that provides a memory of
date and time information during ac power failures. The battery should be replaced at least
once a year or whenever the Exciter - Low Battery alarm appears (on the front panel UI or via
remote AUI). Chemical leakage from an old battery can cause damage.
NOTE
The exciter PWB’s battery is used only for the RTC clock (clock, logs, and RDS clock
information, if used). If the battery fails or an ac power loss occurs, the state prior to the
event is retained; the transmitter recovers to the same preset, remote enabled/disabled
mode, and RF on/off mode (these settings are stored in EEPROM). Reset the clock(s) and
note that logged events that occurred before replacing the battery will be reflected by the
time error.
To replace the exciter PWB’s battery, perform the following steps:
(a) Gain access to the exciter PWB (A1) by removing the top cover and retain hardware.
(b) Replace battery BT1 on the VSHD exciter PWB. Refer to Figure 7-11 for the location of the
PWB.
(c) Re-install the top cover with the hardware retained in step (b).
(d) Verify any battery related alarms have cleared.
NOTE
Battery Low related alarms can persist for up to 24 hours, or until the microprocessor checks
the state. We recommend you wait a reasonable period of time before assuming the battery
replacement was not effective. Cycling the ac power will force a battery check.