Operation And Calibration - Thermo Scientific 815 Operating And Maintenance Manual

Operation and Calibration

Section 3
Power up by depressing the ON/OFF switch. Immediately after turning
on power, all the segments of the display and all of the indicators will be
on. After one second the display will show the actual temperature and the
actual temperature indicator light will be lit. If the setpoint temperature is
greater than the actual temperature, then the heater on lamp will be on or
start to flash. If it flashes, then the actual temperature is near setpoint
temperature.
To display any temperature value - With the use of either the SET
Temp/Cal key or the HIGH/LOW LIMIT key, any temperature value can
be displayed. To view the set temperature, press the set Temp/Cal key
once. The green indicator for the set temperature will light. If no other
keys are pressed, within 5 seconds, the display will automatically return to
the actual temperature. To view the calibrate temperature, press SET
TEMP/ CAL twice while the display is showing the actual temperature.
The same sequence of key operation is true for the use of the HIGH/LOW
LIMIT key.
To change the setpoint temperature - Press the SET TEMP/CAL key
once. Then press the UP or DOWN arrow key until the desired
temperature is displayed. When continuously pressing either the UP or
DOWN keys, the display will begin to change rapidly. With a little
practice, one will become accustomed to this. After the desired set
temperature is achieved, then press the ENTER key. The display will then
return to showing the actual temperature. If the ENTER key is not
pressed, the expected new set temperature will not be accepted and the
incubator will control at the previous set temperature.
If the setpoint temperature is over ambient temperature by more than 5°C,
the "compressor cooling function" isn't needed. Set the cooling switch at
the "Off" position. Then the energy and temperature performance will
provide better values.
The incubator is calibrated at the factory for use over a wide range of
temperatures. Due to the slight non-linearities in the control system, it
may be necessary to make the display match a calibrated thermometer's
reading, even though the difference might be only a few tenth's of a
degree.
Thermo Scientific Refrigerated Incubator 3-1