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Also, any degree of offset observed for a given temperature setting may be different for other temperature
settings on the dial. The control dial is calibrated at the factory in the middle of the model's temperature range
and is therefore most accurate in these middle-range temperatures. Over time, continuous use at a single
temperature setting may require periodic re-adjustment as the contacts wear or as ambient temperatures change
seasonally, or from air conditioning or heating. See also: "Temperature Dial Calibration".
Article or media processing times and temperature uniformity are largely dependent on load density and
positioning. Load the oven so that the air circulation within the oven is not impaired. Here are some general
guidelines:
Leave a space between multiple articles on a shelf. Stagger articles from those on lower shelves in a "V"
formation.
(FIG 5)
Avoid placing articles or media against or in close proximity to walls, especially on the lower shelf,
allowing
unrestricted air flow around articles and contributing to even and consistent heating.
Use of large solid trays, or foil on shelves severely limits heat to the shelves and articles placed above.
(FIG 6)
Since not enough heat rises within the chamber, thermometer readings at the top of the chamber give false
indication that temperature setting is too low. Higher temperature adjustments made as a result of these readings
could overheat the lower-placed articles or media.
For best processing performance for a single item, adjust a shelf so that the item is centered in the oven chamber.
FIG. 4
FIG. 6
FIG. 5
Ideal Air Circulation
General Operation
(continued)
Obstructed
Air Circulation
Chamber Loading
To set a temperature in degrees Centigrade, turn the knob in a
clockwise direction until the white triangle with the "°C" marking
is pointing toward the desired temperature printed on the face of
the control panel.
(FIG 4)
Rotate the thermostat dial to the desired temperature. The
heat-cycle light will illuminate until the set temperature is
reached. Once reached, the heat-cycle light will cycle on and off
with the heaters maintaining set temperature. Typically, the oven
will need to cycle at a set temperature for a minimum of 20
minutes before it will achieve equilibrium and become
temperature stable.
NOTE:
The temperatures printed on the "quick-set" dial are
designed to help quickly set a temperature to within a close
proximity of the indicated dial temperature. Small rotational
adjustments to the dial will likely be required to set a more
precise temperature setting as measured against a reading from
the glass thermometer (supplied), or other measuring device.
HEAT CYCLE
Model 30GC Lab Oven
ON
POWER
OFF
HEAT CYCLE
Model 30GC Lab Oven
ON
POWER
OFF
Unit Safety Reset-
If the unit exceeds its maximum temperature, an internal safety “snap disc” will cut power
to the unit until it is manually reset. To do this, unplug the unit, lay it on its back and remove the bottom cover.
Locate the round “snap disc” and push-in the button to reset.
RISK OF ELECTRICAL SHOCK. DISCONNECT UNIT FROM POWER SOURCE BEFORE REMOVING COVER.
FAILURE TO COMPLY COULD RESULT IN SERIOUS INJURY OR DEATH.
WARNING:
