3-10. REMOVE/INSTALL MANOMETER - continued.
Service Manometer. (Figure 3-7).
Mercury is a poisonous material which may enter the body by
ingestion, inhalation, or skin absorption. Mercury has such density,
high surface tension, and low viscosity that pouring without splashing
and spilling is almost impossible. When mercury is poured, always
use a funnel and make the transfer over spill trays. If a mercury spill
occurs, do not vacuum or sweep the area. This will disperse mercury
throughout the laboratory. Spills may be cleaned up by using a glass
tube of about 1 mm and connected by rubber tubing to a filter flash
connected with a vacuum pump or aspirator, the flask acting as a
trap. Control of mercury vapor should not be attempted with Flowers
or Sulfur as this is not effective.
Spills must be reported to the
Environmental Science Officer providing services to the unit.
Protective equipment must be worn when handling mercury.
Dry cleaning solvent P-D-680 (safety or Stoddards Solvent) is
potentially dangerous. Avoid repeated and prolonged breathing of
vapors and skin contact with the liquid. Do not use near open flame,
arcing equipment or other ignition sources.
Always wear eye
protection and protective clothing. The flash point of P-D-680 is 100°
to 138°F (30° to 59°C).
Remove drain plug and drain the liquid into appropriate container.
Remove top plug on the glass tube.
Clean the manometer tube with naptha. Rinse manometer with acetone until the glass
Install Manometer. (Figure 3-7).
Align new manometer mounting holes and install three mounting screws.
Connect hose to manometer hose connection and tighten hose clamp screw.
Install the drain plug and the top plug on the glass tube.
Remove the fill plug.
Vent the instrument on the low pressure side.
Be sure of zero (0) adjustment at