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Introduction

The Digi-Sense Professional Thermocouple Thermometer (Model 20250-20)  

with Four Type K Inputs, Data Logging, and Optional Infrared Wand offers fast 

response and high accuracy. This heavy-duty meter works with up to four type K 

thermocouples and one optional infrared probe*. Advanced features include  

data logging, USB interface, relative time clock, offset compensation, tempera-

ture differential, data Hold, Max/Min/Avg 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

Check individual parts against the list of items below. If anything is missing  

or damaged, please contact your instrument supplier immediately.
1. Meter
2. Four type K flexible probes
3. USB cable
4. Software
5. Carrying case
6. One 9 V battery
7. User manual
8. NIST-traceable calibration report with data 
*Optional infrared wand (model 20250-24) must be ordered separately.

Key Features

•  Large backlit display shows any combination of T1, T2, IR, T3, T4, T1–T2 , T1–IR, 

T2–IR, T3–T4, IR–T3, IR–T4; 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 10,000 sampling points
• User-selectable readout in °C, °F, or Kelvin (K)
• 0.1°C / 0.1°F / 0.1 K resolution
• Automatic power-off mode conserves battery life
• Accepts a wide variety of thermocouple type K probes (up to four)
• Optional IR wand available for safe, noncontact temperature measurements

Summary of Contents for 20250-20

Page 1: ...anual THE STANDARD IN PRECISION MEASUREMENT Professional Thermocouple Thermometer with Four Type K Inputs Data Logging and Optional Infrared Wand with NIST Traceable Calibration Model 20250 20 Enter R...

Page 2: ...contact your instrument supplier immediately 1 Meter 2 Four type K flexible probes 3 USB cable 4 Software 5 Carrying case 6 One 9 V battery 7 User manual 8 NIST traceable calibration report with data...

Page 3: ...4 2 LCD 3 Enter button 4 Up button 5 Rec button 6 C F K button 7 HOLD button 8 DIF T1 T2 T3 T4 button 9 Power on off button 10 MAX MIN button 11 Setup Backlight button 12 IR input Optional infrared wa...

Page 4: ...rared IR TEMP icon requires Optional IR wand sku number 20250 24 7 SETUP mode icon 8 Offset icon 9 Auto power off icon 10 Low battery icon 11 T2 or T4 temperature display 12 MAX MIN AVG icons 13 Secon...

Page 5: ...ton to turn on the backlight Press it again to turn off the backlight Press Setup Backlight button and hold for three seconds to enter or exit the Setup mode See Changing Setup Options 7 Press or Rec...

Page 6: ...t to change this setting 3 Press or Rec button until the setting you want to use appears on the display 4 Press Enter button to store the new setting into memory Note Setup is disabled in the Max Min...

Page 7: ...f no adjust ment is needed press Enter button to exit time setting 2 Set the time The adjust order is year month day hour minute Press C F K button until the value you wish to change is flashing 3 Pre...

Page 8: ...powered off Displaying Temperatures 1 Press C F K button to switch between Celsius C Fahrenheit F and Kelvin K temperature scales 2 Hold or attach the thermocouple s to the measurement location The te...

Page 9: ...with 0 sample points remaining the first value shown will be FULL rather than a number Or if you try to record the REC icon will flash five times and disappear At this point you are no longer able to...

Page 10: ...ta List tab to open the list of measurements recorded Select File icon from the menu bar and save data to desired location on your PC Note Data will be saved in an Excel format that will include all s...

Page 11: ...bove 14 F 10 C 11 F 6 C below 14 F 10 C Auto power off Unit shuts off automatically after 20 minutes to conserve battery life Operating temperature 32 to 122 F 0 to 50 C Storage temperature 14 to 122...

Page 12: ...ery Replacement When the battery power falls low the low battery icon will appear on the screen Replace the 9 V battery in the rear battery compartment by remov ing the cover Ensure that the cover is...

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