TB 9-6920-430-50
WARNING
HIGH PRESSURE GAS is used during the performance of this
calibration. Serious injury may result if personnel fail to
observe safety precautions.
7. Equipment Setup
WARNING
Serious injury may result if you fail to observe safety
precautions. The TI calibration should be performed in a well
ventilated room. High pressure gas (up to 6000 psi) exists
when performing the TI calibration procedure. Gas bottle
column, carrying cart, or any available upright object to
minimize movement of bottle should its gas supply be
unintentionally released. The wrenches used in this procedure
must be open-end type, not more than 8 inches long. Wrenches
more than 8 inches long can cause excessive tightening to over
stress or break fittings, which can result in personal injury. Do
not attempt to tighten fittings with system pressurized.
Be sure the personnel are not in line with the gas supply valve
outlet when performing the next step. Escaping gas can injure
skin and eyes, and direct inhalation of the gas can result in
suffocation.
a. Purge the gas supply adapter by slowly opening (CCW) the valve on the gas bottle
(B4) until gas can be heard escaping. Close (CW) the gas bottle valve after allowing gas to
escape slowly for approximately one second.
WARNING
The safety chains on the Test Hose Assemblies (items B5 and
B6) must be fastened to an eyelet. If fastening to an eyelet is
not possible, then the chains must be wrapped around the
adjacent fittings.
CAUTION
Anti-seize tape MIL-T-2773 must be applied to the threads of
Adapter B1, figure 1, to prevent miscalibration due to leakage.
The tape must not overlap the initial thread or cross threading
may, occur.
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