Temperature Calibration - Thermo Scientific MaxQ 7000 User Manual

Temperature Calibration

Thermo Scientific
1. Place a calibrated digital thermometer in the approximate geometric
center of the bath.
2. Press and hold the "star" () key and using the up or down arrow key,
adjust the set point to the desired temperature.
3. Allow the unit to run for at least 30 minutes.
4. The controller display should now be indicating the set point
temperature. Make note of the thermometer reading.
5. Press and hold both arrow keys until the controller display indicates
tunE. Release the arrow keys. Press and release the down arrow key,
the display should now indicate LEUL. Press and hold the "star" (*)
key and using the up arrow key adjust the display to read 3. Release
the "star" (*) key. Press and release the up arrow key until the display
indicates Zero. The display should now alternate between Zero and a
numerical value.
6. Using the examples shown at the left and the thermometer value
obtained in step above, enter the correct Zero value into the controller
by pressing the "STAR" () key and using the up or down arrow key. If
there is already a Zero value present, then add the new value to the
one already present.
7. When the correct Zero value has been entered, press and hold the two
arrow keys together until the display again indicates the chamber
temperature. If the procedure was done correctly, the controller display
should now agree with the thermometer reading to within ±0.5ºC.
8. Allow the unit to run for at least 60 minutes.
9. Recheck the thermometer reading the controller display and the
thermometer should agree to within ±0.5°C. If not repeat steps 5, 6,
and 7 above.
Table 5-1. Determining Zero Value
Thermometer =
Controller Reading =
Subtract =
Enter Zero value of -5°C
Thermometer =
Controller Reading =
Subtract =
Enter Zero value of +5°C
60°C
65°C
-5°C
70°C
65°C
+5°C
Section 5
Operation
MaxQ 7000 5-3