DIGI-SENSE DIGI-SENSE WD-20250-17 Manual

99 Washington Street Melrose, MA 02176
Phone 781-665-1400 Toll Free 1-800-517-8431
User Manual
Visit us at www.TestEquipmentDepot.com
Professional Thermocouple Thermometer with Dual Type K Inputs and Optional Infrared Wand
with NIST-Traceable Calibration
Model 20250-17
REC
DIF
THE STANDARD IN PRECISION MEASUREMENT
Introduction
The Digi-Sense Professional Thermocouple Thermometer (Model 20250-17) with Dual Type K Inputs and Optional Infrared Wand offers fast response and high accuracy. This heavy-duty meter works with two type K thermocouples and one optional infrared probe*. Advanced features include backlight, Max/Min/Avg readings, data Hold, 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. Two type K flexible probes
3. Carrying case
4. One 9 V battery
5. User manual
6. 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, T3, T1–T2, T1–T3, T2–T3; 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
• User-selectable readout in °C, °F, or Kelvin (K)
• 0.1°C / 0.1°F / 0.1 K resolution
• Scan function (T1, T2, T2, T1–T2, etc.)
• Automatic power-off (sleep) mode to conserve battery life
• Accepts a wide variety of thermocouple type K probes
2
Meter Description
1. Thermocouple type K (T1) input
2. Thermocouple type K (T2) input
3. LCD
4. Enter button
5. Up  button
6. Down  button
7. Power on/off button
8. Setup /
Backlight button
9. °C/°F/K button
10. MAX/MIN button
11. HOLD button
12. DIF/T1–T2–T3 button
13. IR (T3) input*
Optional infrared wand (model
*
20250-24) must be ordered separately.
Display Layout
1
13
8
9
10
12
2
3
Enter
REC
DIF
4
5
6
11
7
1. Thermocouple TYPE K icon
2. Infrared IR TEMP icon (requires
1 2 3 4
Optional IR wand sku number 20250-24)
3. Data HOLD icon
5
4. SETUP mode icon
5.
Primary temperature display (T1, T2, T3, T1–T2, T1–T3, or T2–T3 reading)
6.
Secondary display (Max, Min, A or offset T1, T2, T3 reading)
7. Temperature unit icons (°C, °F, K)
11
vg,
10
6
7
8
9
8. Tertiary display (elapsed time or
T1, T2, T3 reading)
9. Low-battery indicator
10. Elapsed time (hour:min or min:sec)
11. MAX, MIN, AVG icons
3
Setup and Operation
1. Press the Power on/off button to turn unit on.
Using Thermocouple Input(s)
1.
Plug the type K thermocouples into the T1 and T2 input connectors.
After one second the thermometer displays the first
2.
readings (T1 on upper display play). If no thermocouple is plugged into the selected input or the thermocouple is not properly connected, the display will show "- - - -". If the temperature being measured is outside the unit’s valid range, the display will show “OL” (overload).
Using Infrared Input
1. Purchase optional infrared wand (model 20250-24).
2.
Plug the IR wand into the T3 (IR) input connector “T3 - - - -” will show on screen. If the IR wand is not connected, “T3 - - - -” is not shown on the screen.
3.
Press the
SCAN button on the IR wand to begin measuring. The IR (T3) measurement is shown on the tertiary display.
Displaying Temperatures
Press °C/°F/K button to select desired temperature unit:
1. Celsius (°C), Fahrenheit (°F), or Kelvin (K).
2.
As a default, the T1 temperature reading appears in the primary display, the T2 reading in the secondary display, the T3 reading in the tertiary display.
3.
Use the
DIF/T1–T2–T3 button to toggle between showing the T1 (type K), T2 (type K), T3 (infrared), T1–T2, T1–T3, T2–T3 (temperature differentials) measurement in the primary, secondary, or tertiary display.
, T2 on secondary dis-
.
Optional IR wand (model 20250-24)
4
Hold Function
1. Press HOLD button to freeze the readings on the display. The screen shows the HOLD icon.
Use the
2.
DIF/T1–T2–T3 button to toggle between showing the T1 (type K), T2 (type K), T3 (infrared), and T1–T2, T1–T3, T2–T3 (temperature differentials) measurement in the primary, secondary, or tertiary display.
3.
Press HOLD button again to turn off the HOLD function and resume measuring.
MAX, MIN, and AVG Function
Press MAX/MIN button to step through the maximum (MAX), minimum (MIN),
1. and average (AVG) readings. The elapsed time since entering Max/Min/Avg mode, or the time at which the minimum or maximum occurred, appears on the display.
Press and hold the
2.
MAX/MIN button for three seconds to exit the Max/Min/Avg
mode and return to normal operation.
Backlight Function
Quickly press the Setup/Backlight button to turn the backlight on and off.
5
Setup Options
Use the Setup mode to change the temperature offset and sleep mode settings.
Note: Setup mode is disabled in Max, Min, and Avg modes.
Changing a Setup Option
1.
Press and hold mode. When the meter is in Setup mode, the display shows the SETUP icon.
2. Press Up or Down button to scroll to the setup option you want to change.
3. Press ENTER button to indicate that you want to change this setting.
Press Up or Down button until the setting you want to use appears
4. on the display.
5. Press ENTER button to store the new setting into memory.
Offset Function
The primary display shows the temperature plus the offset and the secondary display shows the offset. You can store individual offsets for T1, T2, T3.
Use the Offset option in the Setup mode to adjust the thermometer’s readings to compensate for the errors of a specific thermocouple and IR temperature. The allowable adjustment range is ±9.0°F or ±5.0°C.
1. Plug the thermocouple into the T1 input connector.
2.
Place the thermocouple in a known, stable temperature environment (such as an ice dry well calibrator).
3. Allow the readings to stabilize.
4.
While in Setup mode, press the “T1” screen.
5. Press Enter button to access the setting.
6.
Use the primary reading matches the calibration temperature.
7. Press ENTER button to store the new setting into memory.
Up and Down buttons to change the offset value until the
Setup/Backlight button for three seconds to enter or exit Setup
Up or Down button to scroll to the
Changing the Auto Power-Off (APO) Mode
The meter’s default mode is to automatically shut off after 20 minutes of non-use. To disable the auto power-off mode, enter the Setup mode.
1.
While in Setup mode, press “SLP” screen.
2. Press ENTER button to display “On.”
3.
Use the or “Off” (sleep mode off).
4. Press ENTER button to store the new setting into memory.
5. Note: Meter defaults back to “On” once meter is powered off.
6
Up or Down buttons to toggle between “On” (sleep mode on)
Up or Down button to scroll to the
Specifications
Range
Temperature, external type K thermocouple
Resolution
Temperature display 0.1 (<1000) or 1 (1000)
Accuracy
T1, T2 (T/C)
T1–T2 (T/C) ±[0.5% reading + 1.8°F (1°C)]
T3 (IR) ±[2.0% reading + 3.6°F (2°C)]
T1 (T/C) – T3 (IR) ±[2.0% reading + 5.4°F (3°C)]
T2 (T/C) – T3 (IR) ±[2.0% reading + 5.4°F (3°C)]
–328 to 2501°F (–200 to 1372°C)
±[0.15% reading + 1.8°F (1°C)] above –148°F (–100°C) ±[0.5% reading + 3.6°F (2°C)] below –148°F (–100°C)
Auto power-off
Unit shuts off automatically after 20 minutes to preserve battery life
Operating temperature 32 to 122°F (0 to 50°C)
Storage temperature 14 to 122°F (–10 to 50°C)
Weight 9.8 oz (280 g)
Dimensions 8" x 3" x 2" (20.1 x 7.5 x 5 cm)
Power One 9 V battery
Optional Infrared Wand (Model 20250-24)
Temperature range –31 to 1022°F (–35 to 550°C)
Resolution 1 mV per °F/°C
Basic accuracy ±2% or ±4°F (2°C)
Response time Less than 500 ms
Optical resolution
8:1
(Distance-to-Spot ratio)
Plug diameter Banana plug: 0.16" (4 mm)
1
Dimension 6
2" x 2" x 11⁄2" (16.4 x 5 x 4 cm)
Power One 9 V battery
7
Maintenance, Recalibration, and Repair
Cleaning and storage
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 within the storage range indicated in the
Specifications on page 7.
Battery 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 removing the cover Ensure that the cover is securely refastened when finished.
It is recommended that Digi-Sense products are calibrated annually to ensure proper function and accurate measurements; however, your quality system or regulatory body may require more frequent calibrations. To schedule your recalibration, please contact InnoCal, an ISO 17025 calibration laboratory accredited by A2LA.
Phone: 1-866-INNOCAL (1-866-466-6225) Fax: 1-847-327-2993 E-mail: sales@innocalsolutions.com Web: InnoCalSolutions.com
.
For Product and Ordering Information, Contact:
99 Washington Street Melrose, MA 02176
Phone 781-665-1400 Toll Free 1-800-517-8431
Visit us at www.TestEquipmentDepot.com
1065DGMAN_20250-17 Rev.1
Manual Part No. 00100-56
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