LABOVENS.INS.7-18.wpd 12 of 23 07/18
5-11 TEMPERATURE CONTROL
5-11.1 The thermostat is marked with numbers for reference only and does NOT indicate
the oven temperature. To obtain the desired temperature, make a trial setting of
the thermostat and observe the actual oven temperature as shown by the
thermometer. Allow the oven to cycle several times, as indicated by the red pilot
light, before making a new trial setting of the thermostat. A few trial settings will
show you the approximate position of the thermostat for various temperatures.
5-11.2 Do not attempt to operate your laboratory oven at temperatures above the
maximum rating of the oven. Higher temperature units are available C please
contact the factory for information.
5-12 OVER TEMPERATURE PROTECTION
5-12.1 Units rated up to 200EC are equipped with a one time excess temperature limit
interlock. Operating these ovens at temperatures above their maximum rating or
restricting free movement of the heated air from the heat chamber (located below
the perforated bottom of the oven work space) will result in these devices opening
the circuit to the heating elements. These devices are NOT resettable and must
be replaced. They are located within the heat chamber (under the heat chamber
guard at the bottom of the workspace) connected to one terminal of the thermostat.
5-12.2 Units rated to 270EC have a manual reset excess temperature limit interlock. This
interlock is reset by pushing in the red button located at the rear of the oven. This
excess temperature limit interlock will NOT reset until oven temperature is well
below maximum operating temperature.
5-12.3 Do not operate oven without a functional heat limiter or an excess temperature
interlock. Do not bypass or otherwise defeat the excess temperature interlock.
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