Follow one of the following links to your platform-specific calibration instructions:

How do I calibrate a sensor in Logger Pro?
How do I manually calibrate my sensor in LabQuest?
How do I manually calibrate my sensor in Graphical Analysis 4?
How do I manually calibrate my sensor in Graphical Analysis 4 for iOS/Android?
How do I manually calibrate my Go Wireless pH or EA in Graphical Analysis GW for iPad or Android?

Calibration Storage:
How do I store the calibration for my sensor using Logger Pro?

Specific Sensor Calibration Questions:
Do I need to calibrate the Goniometer?
Can you calibrate a Stainless Steel Temperature Probe?
How do you calibrate a Go!Temp?
How do I calibrate a COL-DIN Colorimeter using a stand alone LabQuest 2?
My ISEs do not calibrate correctly in EasyData 2.0
How do I calibrate my older Colorimeter?
Why won't my pH Sensor calibrate?
Can I calibrate my PAR Sensor using a standalone PAR Meter?
I am using a third-party electrode with your Electrode Amplifier. How do I calibrate the electrode in LoggerPro 3?
How do you calibrate an accelerometer?
Do I need to calibrate Vernier ethanol sensors?
Is there a way to calibrate the Motion Detector?
Can I perform a two-point calibration for the Optical DO Probe?
Can I perform a custom calibration of a Vernier spirometer?