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Digi-Sense 20250-03 User Manual

Thermocouple thermometer with four type k/j inputs and data logging with nist-traceable calibration
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User Manual
Thermocouple Thermometer
with Four Type K/J Inputs
and Data Logging
with NIST-Traceable Calibration
Model 20250-03
THE STANDARD IN PRECISION MEASUREMENT

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Summary of Contents for Digi-Sense 20250-03

  • Page 1 User Manual Thermocouple Thermometer with Four Type K/J Inputs and Data Logging with NIST-Traceable Calibration Model 20250-03 THE STANDARD IN PRECISION MEASUREMENT...
  • Page 2 Introduction The Digi-Sense Thermocouple Thermometer with Four Inputs and Data Logging (Model 20250-03) offers fast response and high accuracy. This thermometer accepts four thermocouple sensors (type K or J). Advanced fea- tures include data logging, USB interface, relative time clock, offset compensation, temperature differential, data Hold, Max/Min/Avg readings, and auto power-off.

  • Page 3: Key Features

    Key Features • Large backlit display shows any combination of T1, T2, T1–T2, T3, T4, T3–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 •...

  • Page 4: Meter Description

    Meter Description 1. Temperature sensor inputs (4) 2. LCD 3. SET / backlight button 4. (Up)/T1–T2/T3–T4 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...

  • Page 5: Display Layout

    Display Layout 1. T1, T2, T1–T2, T3, T4, and T3–T4 icons 2. HOLD icon 3. Auto power-off icon 4. Primary temperature display 5. User-selectable temperature units (°C/°F/K) 6. Secondary display (Max, Min, Avg, Offset, or T1 to T4 readings) 7. MAX, MIN, AVG icons 8.

  • Page 6: Setup And Operation

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

  • Page 7: Setup Mode

    6. Press /Max/Min button to step through the maximum, minimum, and average readings. To exit the Max/Min/Avg mode, press and hold /Max/Min button for three seconds to return to normal operation. 7. Press Set/backlight button to turn the backlight on and off.
  • Page 8 Changing Setup Options 1. Press /T1–T2/T3–T4 button or Hold/ button to scroll to the Setup option you want to change. 2. Press Rec/Enter button to indicate that you want to change this setting. 3. Press /T1–T2/T3–T4 button or Hold/ button until the setting you want to use appears on the display.
  • Page 9 Using the Offset to Adjust for Probe Errors Use the offset option in the Setup mode to adjust the meter’s readings to compensate for the errors of a specific thermocouple. The allowable adjustment range is ±9.00°F or ±5.00°C. 1. Plug the thermocouple into the input connector. 2.
  • Page 10 Sample Rate of Data Recording (continued) 5. Press /Max/Min button again until the second value is flashing. Use the /T1–T2/T3–T4 and Hold/ buttons to set the desired value. 6. Press Rec/Enter button to store the new setting into memory. 7. Note: When the meter is powered down, the default sample rate is the last setting.
  • Page 11 6. Press /Max/Min button again until the day value is flashing. Use the / T1–T2/T3–T4 and Hold/ buttons to set the desired value. 7. Press /Max/Min button again until the hour value is flashing. Use the / T1–T2/T3–T4 and Hold/ buttons to set the desired value.
  • Page 12 Clear Memory Operation (continued) 3. Press Rec/Enter button and “No” appears on the screen. (Fig. 5) 4. Press / T1–T2/T3–T4 button or Hold/ button until the display shows “YES”, indicating the memory will be cleared. 5. Press Rec/Enter button to select the “YES” setting and clear the memory.
  • Page 13 Measuring Temperatures 1. Plug the thermocouple(s) into the T1, T2, T3, or T4 input connector(s). Make sure that the polarity is correct. 2. 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).
  • Page 14 Hold Function 1. Press Hold/ button to freeze the readings on the display. The display shows the HOLD icon. 2. Press /T1–T2/T3–T4 button to toggle between showing the T1, T2, and T1–T2 readings in the primary or secondary display. 3. Press and hold /T1–T2/T3–T4 button for three seconds to bring up the T3, T4, and T3–T4 read- ings.
  • Page 15 Recording/Data Logging Operation (Meter) 1. Press Power on/off button to turn the unit on. The first value immediately shown is the number of data logging sample points remaining. (Fig. 7) 2. Press and hold Rec/Enter button for three seconds until the REC icon appears.
  • Page 16 Recording/Data Logging Operation (Software) 1. First install software on PC following the setup wizard (see “Software Installation” on next page). Once software is successfully installed, the “MultiDL” software icon shortcut will be automatically placed on your PC desktop. 2. Connect the meter to your PC via the supplied USB cable. 3.

  • Page 17: Software Installation

    10. To download the data to the PC, select the downward facing arrow in menu bar in the software window. The software screen will display the data being downloaded from the meter. Upon completion of downloading the data to the PC, the data results will be displayed graphically.

  • Page 18: Specifications

    Specifications Range Type K thermocouple(s) –328 to 2501°F (–200 to 1372°C) Type J thermocouple(s) –346 to 2012°F (–210 to 1100°C) Resolution Temperature display 0.1 below 1000 or 1 above 1000 Accuracy T1, T2, T3, T4 temperatures ±[0.5% rdg + 1.8°F (1°C)] above –148°F (–100°C) T1, T2, T3, T4 temperatures ±[0.5% rdg + 3.6°F (2°C)]...
  • Page 19 Note: If you do not intend to use the meter 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.
  • Page 20 For Product and Ordering Information, Contact: Toll-Free: 1-800-358-5525 Toll-Free: 1-800-323-4340 Phone: 1-847-327-2000 Phone: 1-847-549-7600 Fax: 1-847-327-2700 Fax: 1-847-247-2929 Davis.com/Digi-Sense ColeParmer.com/Digi-Sense 1065DGMAN_20250-03 Rev.1 Manual Part No. 00100-37...

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