TQ Aviation KTX2-F.0100
EASA.AP445 MAN
KTX2-F.A-MAN.0001.docx Page 51 of 74
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7. After a few seconds either the “Delta” value is showing the altitude offset value or a notification is
displayed.
In a normal case the calibration procedure was successfully performed and the new altitude offset
value is stored.
In a rare case the offset value determined by the calibration procedure is beyond the limits.
Possible reasons can be:
• Altitude set point values of transponder and static test set do not match.
=> Check the settings.
• Failure in the static port connection from the static test set to the transponder.
=> Check the installation.
• Failure of the altitude encoder.
=> Send the unit for servicing.
To verify the altitude measurement the following procedure must be performed:
1. Switch off the transponder.
2. Switch on the transponder in “Setup Mode” and enter the “Test Mode” (see 3.4.5.2).
3. On the pitot static test set drive the altitude to -1000 feet.
4. Verify that the altitude displayed on the transponder correspond within the 125 foot tolerance.
Additionally verify the altitude value transmitter by the transponder.
5. Repeat this procedure for all altitudes to the service ceiling of the aircraft in steps of 1000 feet.
3.4.5.2 Test Mode
The submenu “Test Mode” displays the following internal measurements:
• Operating voltage (Battery)
• DC Converter voltage (power supply for the transmitter)
• Altitude (in feet)
Figure 40: Test Mode Menu
3.4.5.3 Device Info
The submenu “Device Info” displays the checksum of the software and the serial number of the device.
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