TRT800H / P/N 800ATC-H-(26x)-(26x)
Operation and Installation
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Document-No: 03.2126.010.71e / Revision: 1.00
4.4.4 Altitude Correction/Offset
The TRT800H has an integrated, temperature compensated high-
precision pressure sensor. This sensor is factory-calibrated so that it will
yield accurate flight level (uncorrected pressure altitude) within the entire
altitude range.
However, due to differences in calibration of the TRT800H pressure
sensor and the altimeter in the cockpit, it may become necessary to
adjust the TRT800H pressure readings so that the value indicated and
transmitted by the TRT800H corresponds to the indication of the primary
altimeter seen by the pilot within 125 feet (as specified in ETSO
C88a/SAE AS 8003).
The check for correspondence between the primary altimeter and the
TRT800H is usually performed every 24 months as part of the aircraft's
altimeter checks.
Altitude correction is based on setup configurable offset values at five
interpolation points ( 2,000, 8,000, 18,000, 25,000 and 35,000 ft).The
offset value itself is limited to a range from -100 to + 100ft at each point
(10ft steps).
4.5 Setup Procedure
Programming of the ICAOA 24-bit Aircraft Address and of
the Aircraft Category shall be executed by qualified
personnel only!
A wrong Aircraft Address or Flight ID may cause serious
problems ATC or with ACAS/TCAS systems!
Pilot and owner are responsible for correctly set
transponder data.
Setup
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4.5.5