This procedure describes the method of trimming the Thermapen Mk4 at a
single temperature point (32°F/0°C) by using a properly made ice bath. The
Thermapen should rarely need adjustment and should only be performed if
absolutely necessary.
Materials Required:
• Philips screwdriver to open battery compartment
• Large kitchen cup (preferably 1 quart/1 liter size)
• Crushed ice (enough to fill cup)
• Water
Determining if Your Thermapen Requires Adjustment:
1. Make a proper ice bath by following these steps:
• Fill a large cup with crushed ice.
• Add just enough water into the cup to fill in the gaps in ice so no ice floats off the bottom of the cup. Too much water will
cause errors. Poor off water as necessary.
• Stir gently and wait approximately 1 minute.
2. Set the Thermapen display to read in tenths (example: 32.1°F) of a degree.
If the display is set to read temperature in whole degrees, change to tenths by following these steps below.
See video here:
youtube.com/watch?v=O4k8m4lkDgk
• Using a Philips screwdriver, remove the battery compartment.
• Open the probe to turn on the Thermapen.
• Locate the Set and Menu buttons.
• Press the Menu button twice until 1 is displayed.
• Press the Set button to change the display from reading 1 to 0.1.
• To save the changes, press the Menu button until End is displayed.
• Replace the battery cover making sure not to overtighten.
3. Test the Thermapen display using the ice bath following these steps:
• Turn the Thermapen on by opening the rotating probe.
• Insert the tip of the metal probe into the ice bath about 2 inches (50mm) maximum.
• Stir gently so the tip does not rest on any ice. While stirring observe the displayed reading after about 15 seconds.
• Once the display is stable and no longer changes, write down the reading. You’ll need this if the Thermapen requires
adjustment.
4. Determine if an adjustment is necessary.
• If the reading from the ice bath test is within acceptable limits: 31.3°F and 32.7°F (–0.4°C and +0.4°C); then no
adjustment is necessary.
• If the reading is outside of acceptable limits proceed to making the trim adjustment.
Thermapen
®
Mk4
Trim Adjust Procedure
ThermoWorks, Inc
• 741 E. Utah Valley Dr., American Fork, UT 84003 • ph: 801-756-7705 • fax: 801-756-8948 • [email protected] •
www.thermoworks.com
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