Equipment Setup

TB 9-4920-367-35

NOTE

Unless otherwise specified, verify the result of each test and,

whenever the test requirement is not met, take corrective

action before continuing with the calibration. Adjustments

required to calibrate the TI are included in this procedure.

Additional maintenance information is contained in the

manufacturer's manual for this TI.

NOTE

Unless otherwise specified, all controls and control settings

refer to the TI.

7. Equipment Setup

NOTE

Insure that pneumatic pressure standard (A1) transducers

have been zeroed within the last 8 hours.

a. Remove brass fitting with nipple from flexible hose of TI.

b. Connect equipment as shown in figure 1. (Connect TI to 0-20 PSIA inlet port on

pneumatic pressure standard.)

c. Open exhaust valve, shutoff valve, and inlet valve on pneumatic pressure controller

(B4).

d. Position controls on pneumatic pressure standard as indicated in (1) through (6)

below:

(1) Set POWER switch to ON and allow 1 minute for warm-up.

(2) SOURCE pushbutton to INT.

(3) UNITS DISPLAYED switch to IN HG.

(4) RANGE pushbutton to 0-20.

(5) SENSITIVITY pushbutton to LOW.

(6) Press RESET pushbutton.

e. Lightly tap TI and compare TI ambient atmospheric pressure indication to

indication on pneumatic pressure standard. If TI indication does not agree with pneumatic

pressure standard within ±0.25 in. Hg, adjust the calibration adjustment (located beneath

the glass face of TI) to agree with pneumatic pressure standard indication.