the electrical connections, and insert the replacement. If further service is required on the oven, contact the local
laboratory supply distributor, local representative of the manufacturer, or the technical service department of the
manufacturer for further assistance. DO NOT return the oven for repair or service without first contacting the proper
parties for shipping instructions. Service and repair parts are available through the distributor of the manufacturer's
products. Mention the serial number and the catalog number of the oven on all correspondence.
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 flask
connected with a vacuum pump or aspirator, the flask acting as a trap. Control of mercury
vapor should not be attempted with Flowers of Sulfur as this is not effective. Spills must be
reported to the Environmental Science Officer providing services to the unit.
Most cleaning solvents are hazardous. Avoid prolonged skin contact and breathing of
vapors. Check container label for warning.
a. Cleaning. The normal maintenance necessary with the manometer is an occasional cleaning of the glass tube,
where deposits of oxidized mercury have collected on the interior surface. Drain the mercury and remove the top and
bottom plugs on the tube. A suitable brush with either naphtha or acetone moved rapidly up and down in the tube will
clean the tube efficiently.
Refill the manometer reservoir with clean mercury. See paragraph 2-31 for instructions on