TB 9-4931-228-24
NOTE
Place TI in normal operating position (vertical or horizontal)
during the following procedure.
c. Configure digital pressure controller as indicated in (1) through (5) below.
(1)
Units to inHg.
(2)
Select Gage operation.
(3)
Select 300psig range.
Press control button. Enter set point of -28.0 inHg, and rate of 0.5 inHg/s.
(4)
Press set-up button. Select User menu and zero the 300 psig range.
(5)
d. Observe TI. If TI does not indicate zero, adjust recalibration screw to obtain zero
indication.
e. Open nitrogen bottle valve. Adjust manifold bracket regulator to apply 10 psi to
digital pressure controller +300 Supply.
f. Energize vacuum pump.
5