REVUE THOMMEN AG
CH-4437 Waldenburg
AD20 Standby Altimeter
Page 30 of 72
07-Sep-2009 Document No: AD-INSOP-800 Revision: 1.6
2.4 TESTING
2.4.1 Startup BIT Sequence
As soon as the instrument is powered all segments and annunciations on the instrument are seen for
1 s during startup built-in-test time. At the same time the pointer moves clockwise to detect its
reference position. After finding the reference position the pointer moves to the measured altitude
indication.
The self-test (TEST button pushed) executes the startup BIT sequence.
2.4.1.1 Display of all LCD segments / white lighting
Fig. 2-3 Display of all LCD segments / white lighting
2.4.1.2 Display of battery charge / amber lighting (optional)
Fig. 2-4 Display of battery charge / amber lighting (optional)
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