(7) When the Heise meter indicates 45psia, set the manual relay control
switches for SSR 0 and 1 to the OFF position.
(8) Adjust the pressure span potentiometer, R-64, until the dvm reads the
same as the Heise meter. Note that the decimal point is one digit different between the
two meters.
(9) Set the manual control switches for SSRs 3 and 5 to the ON position.
This will cause a vacuum to be drawn on the chamber.
(10) When the Heise meter reads 5.0psia, set the manual relay control
switches for SSR 3 and 5 to the OFF position.
(11) Adjust the pressure zero potentiometer, R-126, until the dvm reads the
same as the Heise meter. Note that the decimal point is one digit different between the
two meters.
(12) Repeat steps 5 through 11 until both readings are within specification.
(13) Return chamber pressure to zero psig.
(14) Place auto/manual switch in the AUTO position.
(15) Set the RTD box to the Vr position.
(16) Disconnect the meter leads from the RTD Test Box.
(17) Turn OFF the Heise meter.
1-10. ADJUSTMENT PROCEDURES
To make adjustments, follow the procedures presented in the following
paragraphs.
NOTE:
Make the door adjustments with a hot chamber and door so that the
adjustments are made under a normal heat expansion condition.
WARNING
Do not use the door latch to support the weight of the door. Before
repairing the door, support the weight of the door by placing blocking
under it.
MD0354
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