How do I recalibrate my TP15H?

The TP15H can be recalibrated by completing the following:

1. Use distilled or purified water to make ice cubes in your refrigerator;
2. Get a thermal insulated bottle. If you don’t have one, use a beaker or a regular
cup;
3. Fill the bottle with ice cubes (no less than 70% of the volume), then top off with
cold distilled or purified water (no greater than 30% of the volume);
4. Stir the mixture and let it sit for 10 minutes to allow the ice and water to reach
its temperature equilibration;
5. Turn on the thermometer and hold the LOCK/CAL button for 5 seconds to enter
Calibration mode. CAL will begin flashing for a few seconds and then the
current temperature reading will begin to flash which means the thermometer
is in Calibration mode;
6. Immerse the probe in the ice/water mixture and make sure not to touch the
sides of the container. Wait till the temperature reading drops to its lowest
value, which should be around 32°F or 0°C. If the temperature of the ice/water
mixture is not within 28°F to 36°F (or -2°C to +2°C), the calibration can’t be
continued: you will need to follow the above steps to re-make the ice/water
mixture;
7. Hold the LOCK/CAL button for 3 seconds to confirm the calibration and exit
the Calibration mode.