6600-NG User’s Manual
125-9110A
Page 53
Press
GO
to start the Self-Test. The Lower section of the display will show the ‘Self-Test Progress’ screen.
The screen will be updated as each test completes successfully. If a specific test fails, the last line of
display will show the failure message and the Self-Test will be aborted. If all the tests pass, the screen
will appear as shown in Figure 3.41
Figure 3.41 : Self-Test successful
Note: The Actual values are NOT updated during the Self-Test.
As shown in Figure 3.41, there are seven categories of tests performed, which essentially check most of
the sub-systems within the 6600-NG. The pumps are started just after ‘Pt measurement system OK’ is
displayed. There is a long delay of about 2 minutes before the next update of the screen (Solenoid-valves
OK). During this time the 6600-NG performs all the remaining four tests (since they are inter-dependent)
before displaying the results. The pumps are turned Off after the tests are completed.
After the tests are completed successfully (or aborted due to a failure), press
CANC
to exit.
Note: Once the Self-Test is started, it cannot be aborted (except by turning power Off).
3.8
GO-TO-GROUND FUNCTION
Note: “Ground” signifies the ambient pressure, NOT the field elevation.
The GND key is used to activate this function. This function performs the following operations:
a.
Sets the Pt Target to the equivalent of 0 knots (in the current Pt units).
b.
Sets the Ps2 Target to the equivalent of 0.0 Dfin (in the current Ps2 units)
c.
Sets the Ps1 Target to the equivalent of the ambient (“Ground”) pressure (in the current Ps1
units).
d.
Sets Pt, Ps2 and Ps1 modes to Control.
e.
Controls both outputs to their respective targets.
This function is typically used in two situations. First, just after connecting to the aircraft when the user
wants to put the 6600-NG into Control mode and control at “Ground” before proceeding further. Second,
when all tests on the aircraft are completed and the user wants to ensure that the outputs are close to
“Ground” before disconnecting the tester from the aircraft.
Note: This function does NOT alter the Rate Target values. Also, it does NOT alter the Units.
The 6600-NG has an internal sensor which is always measuring the ambient pressure. This measurement
of the ambient-pressure is used to establish the “Ground” target value.
Self-Test Progress
Memory check OK
Pump-section OK
Ps1/Ps2 measurement system OK
Ps1/Ps2 control system OK
Pt measurement system OK
Pt control system OK
Solenoid-valves OK
Self-Test successful. Press
CANC
to exit
