Altimeter — Manual
3.2
Airspeed Adjustment - Auto Zero
3. Quickly turn the knob to indicate 999 hPa (29.50 inHg). A
moment later a longer cyan line appears on the top. You must
reach 999 hPa before cyan line disappears.
4. Turn the knob to select 1013 hPa (29.91 inHg) and wait for a
moment. Again, you have to reach this value before cyan line
disappears.
5. Now a full cyan line appears and the LCD display is slightly
altered. It shows the offset and the altitude. Turn the knob
until Indu Altimeter shows the same altitude as the reference
altimeter. Wait for cyan line to disappear.
This completes the sensor offset procedure.
3.2
Airspeed Adjustment - Auto Zero
1020
→
1030
→
1013 for hPa or 30
.
12
→
30
.
42
→
29
.
91 for inHg.
In special situations, when altimeter and airspeed indicator are con-
nected with the CAN bus, you can use altimeter to issue zero cal-
ibration command on the airspeed indicator. Normaly, this is not
needed. You should issue this command only, if airspeed indicator
shows significant offset during pitostatic test.
When airspeed indicator receives such command, it changes offset of
the internal pressure sensor so that it shows true zero afterwards.
Important:
Please make sure that aeroplane is either inside hangar
or there is absolutely no wind and that pitot tube is not covered.
Failing to do so may result in wrong offset and it may worsen airspeed
precision.
The procedure is as follows:
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