Sorry about the late reply. These instructions are what I found on line for the D2 controller:
Meat Probe Calibration
- There are two options under this setting – Calibrate Probe and Probe Offset
- Calibrate Probelace probe in ice water for 1 minute
- Probe offset:Rotate the dial to adjust the probe temperature offset in 1° increments from -15°F to +15°F/-8°C to +8°C. The default setting is 0
- Press the center of the dial to confirm and return to the Settings menu
I just put a pot of boiling water on a burner within probe distance (my charcoal/gas grill has a gas stovetop style burner) and set the probe in the water, 3/4 submerged typical of probe length that would be in the meat. I played with the offset temp degree settings in the controller until the probe read 203* then tested the boiling water with the instant temp gauge and it confirmed the 203* temperature. The read out reacts instantly when the offset is changed so the process was fairly quick and easy.