Precisionâ Instruction Manual
OPERATION (Contd.)
For Model 180, place the stainless steel metal tray (corners turned downward) inside the bath chamber. The tray pro-
vides a sample base and protects samples from touching the hot metal bath bottom. Fill bath with distilled water to
within 3/4" of top of bath, allowing for displacement by sample(s) to be immersed, and for expansion of the media upon
reaching operating temperature.
NOTE: To conserve energy and to reduce evaporation, use a cover
throughout the temperature range of the bath. Do not use aluminum
foil as a cover; it may cause corrosion to the stainless steel as a result
of an electrolytic reaction.
Each bath is supplied with a thermometer holder (metal clip) fastened to the top of the bath and a thermometer and O-
ring packed separately. Slip O-ring onto thermometer, then insert thermometer through metal clip until line indicating
immersion depth is at or below the water surface. When the shelf is in its highest position, the immersion line may be
above the water line; however, the thermometer bulb should be located above the diffuser pan.
CAUTION: Care should be taken to protect the thermometer from
accidental breakage and spillage of hazardous mercury content.
Insert line cord into the proper receptacle and turn line switch to the "On" position. This action will energize the heater
and cause the red pilot lamp to turn "On" and stay lit while the heater(s) is energized. Set thermostat dial, as explained
below, to obtain the desired temperature setting.
CAUTION: Exercise care when using acidic or caustic solutions,
as they will attack the stainless steel bath body if spillage into the
bath should occur.
Clean and remove any spillage and condensation from all sheet
metal surfaces after each test. If spillage into the bath medium
has occurred, the liquid should be drained and the unit thor-
oughly flushed.
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