The Digi-Sense Professional Single-Input Thermometers
(20250-91, -93, -95) offer fast response and laboratory
accuracy. Features include automatic backlight, Max/Min
readings, and automatic power-off. The instrument is fully
tested and calibrated to NIST-traceable standards. Careful
use of this meter will provide years of reliable service.
Unpacking
Carefully unpack the instrument and accessories from shipping package. Check individual parts against the list of
items below. If anything is missing or damaged, please
contact your instrument supplier immediately.
1. Plug the probe into the T1 input connector. Make
sure that the polarity is correct.
2. Press power on/off button to turn on the thermom-
eter. After one second the thermometer displays
the first reading. The screen will display the current
measured value and the maximum temperature.
3. If no probe is plugged into the selected input or the
probe is not connected properly, the display shows
"- - - -". If the temperature being measured is outside the meter’s valid range, the display shows
“OL” (overload).
Thermocouple Input Function (20250-91 only)
1. Press JKT button to set the correct thermocouple
type as J, K, or T.
Backlight Function
1. Press Backlight/°C/°F button for 2 seconds to
turn on or off the backlight (20250-91 only).
2. Press Backlight button to turn on or off the
backlight (20250-93 and -95).
Temperature Units Function
1. Press °C/°F button to toggle between temperature
• The meter should be cleaned with a damp cloth and
mild detergent when necessary. Do not use solvents
or abrasives.
• Store the meter in an area with moderate temperature
and humidity (refer to the operating and storage ranges
in the specifications chart earlier in this manual).
Battery Replacement
When the battery power falls low, the low-battery icon will
appear on the screen. Replace the one 9 volt battery by
removing the screw holding the rear battery compartment
cover to access the battery compartment. Ensure that the
compartment cover is securely fastened when finished.
Note: If you do not intend to use thermometer for a long time,
remove the batteries.
It is recommended that Digi-Sense products are calibrated
annually to ensure proper function and accurate measure-
ments; however, your quality system or regulatory body
may require more frequent calibrations. To schedule your
recalibration, please contact InnoCal, an ISO 17025 calibra-