Baker Hughes Druck DPI 610A, Instruction Manual

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Copyright 1998 Baker Hughes Company.
8 | DPI610A Instruction Manual–English
5. Carefully open the release valve and allow altitude to decrease until the switch operates
again. The display shows the operating pressures and hysteresis.
6. Record the displayed operating data.
7. Allow the indicated altitude to decrease until it is below 1500
ft.
8. Slowly open the manual let-down valve to return the system to ground level.
9. To perform another switch test press RUN (F1).
10. To cancel switch test mode, press TASK.
2.1.2 Method (Non-accessible Switch Contacts)
When the altitude switch contacts cannot be connected to the instrument, an external indicator or
annunciator must be used as the indication of pressure switch operation. The user, on receipt of
an indication of switch operation, presses the MANUAL OPERATION (F2) key:
1. Connect the instrument to the static system. Ensure that the pitot system is vented to
atmosphere before starting the test:
2. Select negative pressure and close the release valve.
3. Close the manual let-down valve.
4. Press the RUN key (F1) and operate the hand-pump, continue until indication of switch
operation and immediately press (F2).
5. Carefully open the release valve and allow the altitude to decrease until the indication of
switch operation and immediately press (F2).
6. Record the displayed operating data.
7. Allow the indicated altitude to decrease until it is below 1500
ft.
8. Slowly open the manual let-down valve to return the system to ground level.
9. To perform another switch test, press RUN (F1).
10. To cancel switch test mode, press TASK.
2.2 Altitude Leak Tests
Select TASK, AERO:
•
Select ALTITUDE LEAK TEST:
ft ft ft
SWITCH TEST
CONTACT STATE
POD = Off
ALTITUDE
RUN
MANUAL
OPERATION
STOP
MANUAL
OPERATION
STOP
POD = Off
ALTITUDE
POD = Off
ALTITUDE
CONTACT STATE
CLOSED AT
5550 ft
OPENED AT 5325 ft
HYSTERESIS 225 ft
SWITCH TEST SWITCH TEST
CONTACT STATE
CLOSED AT
5550 ft
SELECT TASK
SELECT TASK
ALTITUDE
SWITCH
TEST
LEAK TEST
AIRSPEED
SWITCH
TEST
LEAK TEST