Digi-Sense 20250-02 User Manual

User Manual

THE STANDARD IN PRECISION MEASUREMENT

Thermocouple Thermometer
with Dual Type K/J Inputs
and Data Logging

with NIST-Traceable Calibration

Model 20250-02

2

Introduction

The Digi-Sense Thermocouple Thermometer with Dual
Inputs and Data Logging (Model 20250-02) offers fast
response and high accuracy. This thermometer accepts
two thermocouple sensors (type K or J). Advanced features
include data logging, USB interface, relative time clock,
offset compensation, temperature differential, data Hold,
Max/Min/Avg readings, and auto 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

Check individual parts against the list of items below.
If anything is missing or damaged, please contact your
instrument supplier immediately. will provide years of
reliable service.

1. Meter

2. Two type K flexible probes

3. USB cable

4. Software

5. Three AAA batteries

6. User manual

7. NIST-traceable calibration report with data

3

Key Features

• Large backlit display shows any combination of T1, T2,
T1–T2; plus Max, Min, and Avg readings

• Relative time clock on Max/Min/Avg provides a time
reference for major events

• Electronic Offset function allows compensation of
thermocouple errors to maximize overall accuracy

• USB interface

• Data logging capacity of 18,000 sampling points

• User-selectable readout in °C, °F, or Kelvin (K)

• Automatic power-off (sleep) mode conserves

battery life

• Dual sensor inputs; accepts a wide variety of
type K and type J thermocouple probes

4

Meter Description

1. Temperature sensor inputs (2)

2. LCD

3. SET /

backlight button

4. (Up)/T1–T2 button

5. Units (°C/°F/K) button

6. (Return)/Max/Min button

7. Hold/(Down) button

8. Rec/Enter button

9. Power on/off button

5

6

1

4

7

8

9

3

2

5

Display Layout

1. T1, T2, T1–T2 icons

2. HOLD icon

3. Auto power-off icon

4. Primary temperature

display

5. User-selectable temper-

ature units (°C/°F/K)

6. Secondary display

(Max, Min, Avg, Offset,
T1, or T2 reading)

7. MAX, MIN, AVG icons

11

12

2

1

3

4

5

6

7

8

910

13

14

8. Tertiary display (elapsed
time)

9. Time icon (hour:min or
min:sec)

10. SETUP mode icon

11. Low-battery indicator

12. Thermocouple type icon

(K or J)

13. OFFSET icon

14. REC icon (data logging)

6

Setup and Operation

1. Press Power on/off button to turn the unit on. The
value immediately shown is the number of data
logging sample points remaining (from 18,000 to 0).
After one second, the display will then switch to the
temperature measurement reading mode.

2. Press Rec/Enter button for three seconds to start
recording and press again for three seconds to stop
recording. When the thermometer is in Setup mode,
press Rec/Enter button to enter a setup option and
press Rec/Enter button again to store the displayed
setting in memory.

3. Press /T1–T2 button to toggle showing the T1, T2,
and T1–T2 (differential temperature) measurements
in the primary and secondary displays. When the meter
is in Setup mode, press /T1–T2 button to scroll to
the Setup option you want to change or press
/T1–T2 button to increase the displayed setting.

4. Press Units button to switch between Celsius (°C),
Fahrenheit (°F), and Kelvin (K).

5. Press Hold/ button to freeze or unfreeze the
displayed readings. When the meter is in Setup
mode, press Hold/ button to scroll to the Setup
option you want to change or press Hold/ button
to decrease the displayed setting.

6. Press /Max/Min button to step through the maxi-
mum, minimum, and average readings. To exit the
Max/Min/Avg mode, press and hold the /Max/Min
button for three seconds to return to normal operation.

7. Press Set/backlight button to turn the backlight on

and off. Press and hold the Set/backlight button for
three seconds to enter or exit the Setup mode. (See
"Changing Setup Options")