LLZ 421
Operation and Maintenance Alignment Procedure LLZ−1F (LPD)
ILS 420
7−17Ed. 07.08
SOAC
7.5 BATTERY MONITORING
If emergency batteries are available, the battery voltage can be monitored to avoid over discharge
of batteries. For this purpose a warning level can be set and a low level limit can be set.
NOTE: A battery switch off to avoid deep discharge is executed via the separate LVS−circuit and
the relays located on the BP−PS subrack.
a) Open dialog ’LRCI − Environmental Setup’.
b) Enable ’Battery Low Monitoring’ by selecting ’Alarm Maint. Alert’ or ’Alarm Degradation’.
NOTE: ’Alarm Maint. Alert’ means indication only, ’Alarm Degradation’ means action.
c) Set ’Battery Warning Level’ to e.g. 46.0 V.
NOTE: Setting range: 40 to 50 V.
d) Set ’TX off if battery lower than’ to e.g. 44.0 V.
NOTE: Setting range: 40 to 50 V.
7.6 NORMAL OPERATION
a) Switch both TX on and set TX1 on aerial.
b) Check that no MONITOR ALARM or TX WARNING is on, otherwise locate and eliminate the fault.
c) Set TX2 on aerial.
d) Check that no MONITOR ALARM or TX WARNING is on, otherwise locate and eliminate the fault.
e) Set TX1 on aerial.
f) Set all Monitor Bypass off.
NOTE: NORMAL should light up in MAIN STATUS field.
To Next Page
Loading...