Thermo Scientific MaxQ 5000 Operating Manual And Parts List page 23

Temperature
Calibration (cont.)
Thermo Scientific
5. The controller display should now be indicating the set point
temperature. Make note of the thermometer reading.
6. 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.
7. Using the examples shown below and the thermometer value obtained
in Step 5 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.
8. 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 ±0.5°C.
9. Allow the unit to run for at least an additional 30 minutes.
10. Re-check the thermometer reading. The controller display and the
thermometer should agree to within ±0.5°C. If not, repeat Steps 6, 7
and 8 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 5000 Shaker 5-3