ThermoWorks 230-257 User Manual

Super-Fast

®

Thermapen

®

Operating Instructions

Congratulations

The new Splash-Proof Super-Fast Thermapen is a precision thermometer used for many ap­plications including cooking. With proper care it will offer accurate measurements for many
years. The unit is splash-proof but should not be immersed.

Instrument Operation

The unit is switched on by unfolding the thermocouple probe
until the display comes on. Conversely, the unit is turned off
by folding the probe away and lightly pressing the tip into the
rubber probe retainer located at the bottom rear of the instru­ment. It is recommended to store the probe when not in use.

Do not force the probe further than 180° or damage to
the rotating hub may occur.

Rotating hub

The micro-thermocouple sensor is located at the tip of the probe shaft. Minimum immersion
is only 1/8" (3 mm). For best results immerse or penetrate the probe into the food item so the
probe tip is in the place you want to measure. In food, this should normally be the thickest
part.

The Thermapen will read to within 1°F of the final temperature

Minimum immersion 1/8"

Sensor location

Probe Tip

of an ice bath within three seconds. Reading times in other
foods may vary slightly.

Do not immerse the probe all the way to the plastic
rotating hub. Avoid getting flour, moisture or oil on
the hub itself. Although there is an O-ring seal, oils
will work their way past the seal and accumulate in­side the hub and may cause failure. The probe tip is
sharp. Use caution to avoid injury. Do not “stab” the
material to be measured. Use steady force to pen­etrate meats or semi-solids. Avoid bone. Do not lift or
flip heavy meats with the probe tip. The probe shaft
is hollow and contains a sensor. If bent, it may fail.

Instrument Configuration

You can personalize your Super-Fast Thermapen by changing several factory default set­tings including the temperature display units from °F to °C, changing the temperature display
resolution from 1° to 0.1°, and disabling the auto-off feature. To reconfigure these settings,
open the battery compartment (see Replacing the Batteries section for instructions on open­ing the battery compartment) and, using a bent paper clip, change the switch bank settings
as instructed below.

ON

1 2 3 4

+

CR2032

3V

Switch bank
Trim adjust
CR2032 battery

(factory default shown)

Switch

ON

1 2 3 4

Switch 1 – Units Changes the instrument’s display units between (°F) Fahrenheit

and (°C) Celsius. The factory default is °F or switch set furthest
from batteries. To change to °C, move the switch to the position
closest to the batteries.

Switch 2 – Resolution Changes the instrument’s display resolution between 1°(F or C)

and 0.1°(F or C). The factory default is 1° resolution or switch set
farthest from the batteries. To change to 0.1° resolution, move the
switch to the position closest to the batteries.

Switch 3 – Auto-Off Enables or disables the auto-off function. If the auto-off function is

enabled (factory default), the unit will automatically turn off after
10 minutes to preserve battery life. If disabled, the unit will remain
on until the probe is folded away and turned off by the user. The
factory default is auto-off enabled or switch set closest to the
batteries. To disable the auto-off function move the switch to the
position furthest from the batteries.

Switch 4 – Trim Adjust If the Thermapen is within specification, we do not recommend

using the Trim Adjust. It should not be needed in normal use. This

mode allows the user to set an offset that will add or subtract up
to 3.6°F (2.0°C) to all readings of the Thermapen. It can therefore
be used to tune the calibration. For detailed instructions visit www.
thermoworks.com.

Calibration

The Thermapen is individually factory-calibrated using very high-precision temperature stan­dards that are traceable to NIST (national standards). A certificate with actual test data is
supplied with your Thermapen. However, if you have any doubt about its accuracy, you can
check it yourself in a properly prepared ice bath. If it reads correctly in the ice bath, it is almost
certainly accurate at other temperatures.

Making a Proper Ice Bath

Fill a cup or glass with ice. Add just enough water to fill the gaps between the ice. (If the ice
is floating, the water beneath the ice will be at a higher temperature.) After a few moments,
immerse the tip of the Thermapen probe to the middle of the ice and gently stir. Within 3 or 4
seconds the Thermapen will read 32°F within 1°F. Do not let the tip of the probe rest against
an ice cube or you will read a lower temperature (it’s that fast and sensitive). If the reading
is within the published specification, the Thermapen is accurate. You can also test the Ther­mapen in boiling water but you must first know the correct temperature of boiling water at
your altitude and at the current atmospheric pressure. A calculator can be found at