TB 1-4920-443-35
(a) P1 Air (Applies to Engine Only)
(b) Connect the low pressure calibrator to the P1 air partpost on the engine side of the J-box.
Remove hose from rear J Box marked P1 Air and cap fitting at J Box.
the analogic nameplate.
(e) Apply 50 inches H2O pressure to the P1 air transducer via the low pressure calibrator.
(f) Enter the setup mode on the meter by pressing the D and X key simultaneously. Press D until P6
is displayed. When the D key is released, the number shown represents the inputted pressure.
(g) Press the > key to lock in the display. It can now be adjusted using the > key to select the digit
and the ^ key to scroll the digit value. When the number is set to 50.00, press the E key. The
meter will return to normal operation.
(h) Access MT20 in the J-box. Connect the low pressure calibrator directly to the transducer. Apply
the following pressures and verify the display on the P1 Air Panel.
Table 45-3 MT20 P1 AIR Alignment
Pressure In (H2O)
Calibrator
Digital
AEDATS
Pressure
Indicators
P1Air 1.0 H2O
( 2.0)
See Note below
VENT
10
20
30
40
50
RCAL=
NOTE
For AEDATS II Channel names, refer to AEDATS (H345-1) Technical Manual, Appendix C and
for AEDATS IV Channel names, refer to AEDATS (H355-7) Technical Manual. Chapter 6.
AEDATS Alignment MT20 - See Calibration of Automatic Data Acquisition H345-1
(AEDATS II), or H355-7 (AEDATS IV) for FEDS Alignment requirements.
(4) PT101 PT104 (T53,T55, T714A &T63 & T64)
(a) Locate PT104 on the Bell mouth and Barometer Panel in Cabinet 10. Connect the low pressure
calibrator directly to the transducer. Apply the following pressures and record the results.
Table 45-4 PT104 Alignment
Pressure (In H2O)
Calibrator Pressure
Vertical Scale
AEDATS
Bottom Row #8
0.25 In H2O
Indicator ( 0.25)
See Note below
VENT
10
20
30
40
50
