
INSTRUMENT OPERATION
The instrument is switched on
by unfolding the probe until the
display shows the temperature.
The unit is turned off by folding
the probe back into the side of
the unit. The probe should not be
rotated more than 180 degrees
as damage will occur. It is recommended to store the
probe, in the closed position, when not in use.
Apply the tip of the probe to the substance, surface or area
to be measured. The probe should be allowed adequate
time to stabilize to the temperature of the item to be
measured.
INSTRUMENT CONFIGURATION This instrument has four
user selectable slide switches (switch bank), adjustable
with a paperclip, and a single push button ‘Trim Adjust’
which is located under the battery cover.
Switch 1 – Units
Changes the instrument’s display units between (°F)
Fahrenheit and (°C) Celsius. The factory default is °F or
switch set farthest 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
farthest 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.
INSTRUMENT CLEANING - Clean the instrument regularly
with an anti-microbial probe wipe or spray cleaner on a
paper towel to avoid potential food-borne bacteria growth.
WARNING - IPA and other solvents may cause damage to
the case and screen of this instrument.
BATTERY REPLACEMENT - A
battery symbol indicates that the
batteries will need replacing. The
instrument continues to measure
accurately but we recommend
that the batteries be changed
as soon as possible. To replace
the batteries, remove the battery
cover using a coin (U.S. quarter works best). Using firm
but even downward pressure, rotate the battery cover to the
open position. Remove the batteries by pulling the battery
retaining clip back while holding the unit upside down.
Replace both batteries, positive side up, replace cover.
ERROR MESSAGES - ‘Lo’ will be displayed if you are
measuring below the instrument’s range. ‘Hi’ will be
displayed if you are measuring above the instrument’s
range. ‘Err’ will be displayed if the probe develops a fault.
If the error message remains, contact ThermoWorks
Technical Support at (801) 756-7705 or email
techsupport@thermoworks.com.
EMC/RFI - Instrument performance may be affected if
operated within a high frequency radio field, such as near a
mobile phone, or if subjected to an electrostatic shock.
Recommendations for improving surface temperature
measurements (Pro-Surface Thermapen):
1. Surface readings may be affected by airflow, sensor
contact with the surface being measured, the surface
type, surface inconsistencies, and measuring area
cleanliness.
2. Make sure that the flat bottom area of the probe tip
maintains constant and flat contact with the surface
being measured.
3. Apply firm pressure. Allow sufficient time for the
reading to stabilize.
4. Clean surface before taking measurements.
5. Readings may be enhanced with a small amount of
cooking oil to establish better thermal contact with the
sensing area.
6. Surface temperatures may vary along hot surfaces. It
is recommended to test in multiple locations.
CR2032
3V
+
1234
ON
1234
ON
Switch bank
CR2032 battery
Trim adjust
Switch
(factory default shown)
CR2032
3V
+
1234
ON