Microair Avionics
EC2002 Altitude Encoder
16
th
April 2010
EC2002 Installation Manual 01R12.doc
Page 12 of 16
5.1
Adjustments
Step 1 Apply power to the EC2002 Encoder and allow it to
stabilize for 1 minute before measurements are
made.
Step 2 Adjust the pressure test set altitude for +1,000ft. The
corresponding EC2002 altitude should also be
+1,000 feet. Slowly increase and decrease the
al/-100ft to determine the transition points.
The EC2002 should transition down to 900 feet at
950, and transition up to 1,100 feet at 1,050. Note
the transition error, which should be < 25ft.
Step 3 Repeat Step 2 at an altitude of +15,000ft. Test for the transition altitudes from 14,900 to 15,000 at
14,950, and 15,000 to 15,100 at 15,050 and note the transition error.
Step 4 If the average transition error from steps 2 & 3 is greater than 25ft, use an appropriate blunt tool to press
either the HIGH or LOW keys to increase or decrease the altitude output. Each key press will adjust
the EC2002 altitude output by 25ft up to a maximum of +/- 200ft.
Errors of greater than 200ft cannot be compensated for in the field, the unit must be returned to an
authorised service centre for assessment.
Step 5 Test EC2002 altitude value and transition points at various test altitudes as required by specific altimeter
/ Encoder test schedules (eg FAR43).
An Allen key or the shank end of a drill bit makes a good tool to action the HIGH and LOW keys. The
EC2002 is fitted with a nylon block tool guide under the lid to ensure that the tool reaches only the keys.
IMPORTANT NOTE
Do NOT use any sharp pointed tool to action the HIGH or LOW keys.
Damage to the keys will occur.
