6
4. Allow the chamber sufficient time to heat up
and observe the temperature on the
thermometer in the vent cap. The lamp
above the Temperature Control knob should
turn on and off at regular intervals which
indicates the control has stabilized at a
particular set point.
5. If the thermometer indicates that the chamber
temperature is below the desired set point
and the lamp above the Temperature Control
has been turning on and off, rotate the
Temperature Control slightly in a clockwise
direction. Turn the Temperature Control
slightly counterclockwise if the thermometer
indicates the chamber temperature is above
the desired set point.
6. Set the safety adjustment: When the
thermometer indicates the chamber is at the
desired temperature and the lamp above
the temperature control is cycling on and off
at fairly uniform intervals begin to turn the
safety adjustment slowly counterclockwise.
At the moment the safety lamp is illuminated,
the lamp above the temperature control will
turn off. Rotate clockwise until the lamp
above the safety adjustment is off and the
lamp above the temperature control is back
on. The safety limit has now been set.
7.02
When you are finished using the oven,
simply press the ON/OFF power switch to the
OFF position. You may leave the temperature
controls in their set positions if you wish to
resume operation at that temperature some
time later.
7.03 Loading
Although the gravity and mechanical convection
ovens rely on different methods of air circulation,
general loading procedures are applicable to
both types and must be followed. It is important
for uniformity and recovery that air circulation
within the chamber is not restricted.
1. At least one (1) inch (2.5 cm) should be left
between objects placed on the shelves.
NOTE: WITHIN THE MECHANICAL
CONVECTION CABINETS, OBJECTS
SHOULD NOT BE PLACED ON THE
SHELVES IN SUCH A MANNER TO BLOCK
THE MOVEMENT OF HEATED AIR INTO
THE CHAMBER.
2. The bottom floor of the chamber must be
kept free and clear of objects and never
used as a shelf.
3. At no time should solid shelves be substituted
for the shelves that are provided. Additional
shelves and shelf supports are available
from Precision.
7.04 Safety
1. DO NOT place any explosive, combustible
or flammable materials in this chamber.
2. DO NOT place sealed containers in the
chamber. Sealed containers, filled with
materials, do not provide room from
expansion or evaporation and can develop
dangerous vapor pressure as the
temperature increases.
3. Avoid placing plastic materials in the oven.
Extreme temperatures may cause plastics
to melt, posing a fire hazard. If plastics are
placed in the oven, do not leave the oven
unattended.
4. Avoid spillage of liquids or powders within
the chamber. Clean all spills as soon as
possible. Use caution if oven is still hot.
5. DO NOT evaporate noxious or poisonous
fumes.
6. These ovens are not intended for food
service or the preparation of meals.
7. DO NOT store containers filled with acidic or
caustic solutions within the chambers, as
vapors from these materials will attack the
chamber interior and electrical components,
thus voiding the warranty.
