Your logger is factory calibrated to an accuracy given in the logger specifications. However, there may be times when you wish to adjust the calibration of your logger. NIST traceable calibration certificate is available at the factory for an additional cost.
The SUPCOLog software also provides you with the ability to perform a single point offset calibration. This calibration can be used to increase the accuracy of your logger for a restricted data range. For instance, if your application calls for logging temperature between 20°F and 32°F, you may want to calibrate your logger at 26°F.
Warning: Calibrating the logger erases the data that is stored in logger memory.
Calibration only can be performed when the logger is idle (not logging). To calibrate your logger, select Calibrate… from the Logger menu. For extra security, calibration is password protected. You must enter the correct password in the Calibration Password window before you’re allowed to calibrate the unit. The Password Calibration window also allows you to change the password.
Once the password is entered correctly, a window asking you to select the channel to calibrate pops up. Select the channel you would like to calibrate and click OK. Each channel must be calibrated separately.
The User Calibration window for the channel you selected will appear:
To perform the calibration:
Select a stable and accurate reference instrument. It is best to use a reference instrument that has at least 2 to 4 times the accuracy of the logger you are calibrating. For instance, if the accuracy of the logger temperature channel is given as +/-1ºF, the accuracy of your reference instrument should be at least +/-0.5ºF to +/-0.25ºF.
Make sure that both the logger and your reference instrument are reading the same stable source. For temperature and humidity, it is best to place the logger and the reference sensor in a stable chamber.
Adjust your source to the value at which you would like to perform the calibration.
Wait for your reference instrument and the reading in the “Logger Reading” box to stabilize.
Enter the reading from your reference instrument in the “Reference Instrument” box, and hit the Calibrate! button.