Thommen AD20 - Battery Status Display Overview (Optional)

REVUE THOMMEN AG
CH-4437 Waldenburg
AD20 Standby Altimeter
Page 27 of 72
07-Sep-2009 Document No: AD-INSOP-800 Revision: 1.6
1) Operating range:
• nominal operating range where instrument shall be within specs
2) BIT limits
• transmitted values shall be within the parametric BIT limits (tolerances for extreme
environmental conditions have been added)
• values out of limits shall be handled according to BIT-Matrix
2.3.1.9 Battery Status Display Overview (optional)
Status / Condition LCD Indicator LCD color Discrete output
Battery Charge Status The current charge status of the battery shall be checked and
displayed during startup of the instrument.
In operation mode
Battery disabled No indication white High (inactive)
Battery activated constant ‘B‘ white High (inactive)
Battery supply active constant ‘B‘ white Low (active)
Low Battery flashing ‘B‘ amber Alternating high/low
Battery charge not
accepted (invalid Temp.)
flashing ‘C’ amber High (inactive)
Battery aged
(capacity < 70%)
constant ‘A‘ Depending on
conditions above
Depending on
conditions above
Battery charging No special indication – The battery is charged automatically under all
conditions if temperature is acceptable. It has not necessarily to be
activated.
In maintenance mode
Battery test running
- normal
flashing ‘A’
constant ‘B‘
white Low
Battery test running
- low bat
flashing ‘A’
flashing ‘B‘
amber Alternating high/low
Table 2-5 Battery Status Display Overview
Note: In the preflight check make sure there is no amber display indicating low battery!