Temperature Calibration - Thermo Scientific 3403 Manual

Section 6
Maintenance and Repairs
Temperature
Calibration
7-2 Midi 40 CO2 Incubator
1. Ensure shelf support system and empty shelves are in place
2. Fill humidity pan approximately halfway full with distilled water and
position the RH pan on the incubator chamber floor and centered.
3. Install reference temperature sensor into the geometric center of the
chamber ensuring the sensor is not touching any shelves and is
measuring air temp only.
Note There is no access port located on a Midi-40 incubator to permit
passing cables through. Therefore a user must pass their independent
calibration temperature sensor cable through the inner and outer door
gasket seal. If access to a flat or thin style cable is not available, this may
lead to humidity escaping the inner chamber thus causing condensation to
form on the glass door or between the inner and outer doors surfaces. If a
thin style cable is not available, attempt to seal around the cable using
some perma-gum style putty (part # 13014) to help seal the passing of the
cable through the door gasket seal.
4. With power connected to the unit, turn on the key switch from (0) to
the (I) ON position.
5.) To set or adjust the Temp setpoint, enter Program mode. The first
menu is "Set Temp Setpoint", using the increment up arrow or the
decrement down arrow, adjust setting to desired temperature. Continue
to press the Mode button to advance from menu to menu to exit, or
wait 30 seconds and system will default back to normal Run menu.
6. Set CO2 control set point in Program mode to 0.0% to keep CO2
injection solenoid off. It is highly recommended NOT to connect the
CO2 supply at this time.
7. Allow for temperature to stabilize;
a. Start-Up - Allow 12 hours for the temperature in the cabinet to
stabilize before proceeding.
b. Operating Unit - Allow at least two hours after the display reaches
setpoint for the temperature to stabilize before proceeding.
8. Enter Program Mode, go to "Set Temp OFFSET" option and press the
up/down arrow to match the display to a calibrated instrument.
9. For any offset adjustments made, allow at least 1 hour between
adjustments to permit the unit to stabilize again.
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