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B KLN 94
Rev. 4, Jan/2003 10599I04.CDL Page 2-70
2.Press the CRSR button to turn on the cursor.
3.Use the small inner knob to select the exact course that is selected on the HSI or CDI in step 1
above.
4.Adjust the HSI or CDI to another course which is not 180× away from the original course, and
verify the correct course is displayed within 2×. If not, the OBS resolver interface may be
miswired.
5.Press the CRSR button to turn off the cursor. The calibration is now complete.
2.4.1.4 Maintenance 4 (MNT 4) Page
The MNT 4 page is used to set the bus monitor voltage and alert delay so that if the aircraft’s
charging system were to fail (i.e. generator/alternator failure) the pilot would be given timely
notification of the failure. The alert delay is selected so that momentary voltage drops which
could be caused by such things as cycling the aircraft’s gear or flaps do not cause nuisance
notifications to the pilot. When the bus voltage falls below the selected alert voltage for the
selected alert delay time the unit notifies the pilot with the following message that is displayed on
the message page:
Low Bus Voltage
Check Charging System
This Power Monitor feature can be turned on and off by the pilot on the SET 9 page but actual
configuration can only be done from the MNT 4 page. The SET 9 page displays to the pilot the
actual bus voltage to the KLN 94 as well as the alert voltage and alert delay that have been
configured on the MNT 4 page. Changes are made to the MNT 4 page using the CRSR button
and the concentric knobs as described in Section 2.4.1.1.
The MNT 4 page has the following format and choices:
The following procedure is suggested as a means of determining what voltage to use for the alert
voltage. Cycle power to the KLN 94 to exit the Maintenance pages. View the SET 9 page to
determine the actual voltage being supplied to the KLN 94 while the engine is running
(alternator/generator supplying the bus voltage). You may want to do this with the engine at idle
so that you see the lowest possible voltage supplied by the alternator/ generator. Next, determine
the actual voltage being supplied to the KLN 94 when only the battery is supplying the voltage
(alternator/generator turned off or engine not running).
MNT 4 Page Format Selection Choices Default
Bus Monitor
Alert Volt 12.8 V 0.0 - 33.0 V 10.0 V
Alert Delay 15 S 0 - 99 seconds 15 S