3. To measure a differential pressure, connect
the line with higher pressure to the high-pressure connection, and
the line with lower pressure to low-pressure connection.
To fill the mercury reservoir proceed as
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 6 cm diameter drawn out to
an opening 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.
(a) Remove the fill plug on the well.
(b) Yent the instrument on the low pressure
side, and assure zero adjustment at midscale.
(c) Using a glass funnel, slowly pour the
mercury in the well until the indicating level is at approximately
the zero graduation on the scale.
(d) Replace the plug tightly.
(e) Adjust the scale for the correct zero
position in relation to the mercury meniscus.
5. To obtain consistent reading results, always
observe the mercury meniscus in the smae way; read the meniscus at
(5) Distillation Test Apparatus.
(a) Description. The petroleum distillation test
apparatus (fig. 2-10) is designed to provide for the test require-
ments of ASTM D-86. The unit consists of a shield assembly and a
condenser assembly. The shield and condenser exteriors are construc-
ted of stainless steel. The condenser interior is constructed of
copper, insulated with a l-inch (25.4 mm) thickness of fiberglass.
The ice-refrigerated condenser is equipped with a drain and overflow
outlet and a distilled-fuel outlet. The shield encloses a 750-watt
heater with autotransformer, two porcelain refractory blocks, observ-
ation window, and elevating device to allow proper alignment of the
distillation flask to the condenser tube, a temperature control
assembly, and an ON-OFF toggle switch. A wooden block is provided
for support of the cooling jar and graduate.