(d) Contact safety specialist and
contamination and corrective procedures to follow. A
mercury vapor detector will be used to monitor the air in
areas where mercury contamination is suspected.
Operations will not be resumed until the concentration of
mercury vapor drops below 0.05 milligram per cubic
mercury with a mercury vacuum cleaner, mercury
scoop, or a suction device equipped with a water trap.
The contaminated areas should then be coated with a
mercury suppressant, such as one percent calcium
polysulphide, flours of sulfur, or equivalent; then
carefully sweep and pick up contaminated suppressant
materials, and wet-mop the area. The decontaminants
do not remove mercury but coat the droplets and thus
reduce volatilization of the mercury. Monitoring of the
area with a mercury vapor detector should be performed
to determine the thoroughness of the decontamination
contaminated areas have been decontaminated. Area
will be monitored with a mercury vapor detector to
determine thoroughness of decontamination.
(7) Maintenance. To ensure that the
manometer is ready for operation at all times, it must be
inspected systematically before, during, and after
operation. Defects should be discovered and corrected
before they result in serious damage or failure. Defects
or unsatisfactory operating characteristics beyond the
scope of the operator to correct must be reported at the
earliest opportunity to organizational maintenance.
maintenance services rests not only with the operator,
but with the entire chain of command from section chief
to commanding officer.
b. Vacuum Chambers. Vacuum chamber
maintenance procedures are covered in the following
(1) Inspection. Inspect door seal for defects
or damage. When seal is damaged to the extent that it
will not seal properly, it shall be replaced. A thin coat
glycerol, Federal Specification O-G-491, may provide a
temporary seal when defects are slight.
Drycleaning solvent is flammable
and solvent vapors are toxic. Use
P-D-680, Type 11 Solvent in a
well-ventilated area. Keep away
prolonged solvent contact with
(2) Cleaning. Periodically clean vacuum
chamber with a cloth dampened in drycleaning solvent,
Federal Specification P-D-680, and wipe dry with a
c. Turntable Instrument Tester. The turntable
instrument tester, as shown in figure 4-4, is used for
testing gyroscopic instruments that are not required to
indicate aircraft attitude.
(1) Inspection. Periodic inspection of the
unit is required after every 200 hours of operation. The
only inspection required is for chipped, broken, or
cracked gears and components.
Figure 4-4. Turntable Instrument Tester