User's Guide
Digital J/K Type Thermometer
Model TM100
Introduction
Congratulations on your purchase of the Extech TM100 Digital Thermometer with K/J
single-type input. This meter is shipped fully tested and calibrated and, with proper use,
will provide years of reliable service.
Safety
To prevent personal injury or meter damage, use the meter only as specified in this
guide
To avoid electrical shock or personal injury, do not apply more than
20Vrms between the thermocouple inputs or between the thermocouple
Meter Description
Meter
1. Thermocouple input connector
2. Function buttons (Power, Enter, C-F-K)
3. Function buttons (Hold, MAX/MIN, Set)
4. LCD display
5. Battery compartment
Display
1. Setup
2. Offset option
3. Hold mode
4. Auto power off
5. Upper display T1 reading
6. Temperature units
7. Lower display (max, min,
avg, offset value of T1)
8. Max, Min and Average
9. Time display
10. K/J type thermocouple
11. Low Battery
WARNING
and earth ground
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Operation
Connecting thermocouples
1. This meter accepts any K/J-type thermocouple with spade lugs (sub-miniature type
with one spade wider than the other).
2. Plug the thermocouple into the meter's thermocouple input jack.
Measuring
1. Press the button to turn on the thermometer on. After 1 second the
thermometer will display the first temperature reading (upper display).
2. Press the C-F-K button to select the desired temperature unit of measure. A
display icon will reflect the selection.
3. Contact the object to be measured with the probe. Read the measured temperature
in the display.
Note: If the display indicates “OL” the temperature is outside the measurement
range. The display shows "- - - -" when a thermocouple is not connected.
MAX/MIN/AVG mode
Press MAX/MIN to capture and step through the maximum (MAX), minimum (MIN) and
average (AVG) temperature values. These values will be shown in the lower display with
an elapsed time reference below (hrs:mins , mins:sec).
1. Press MAX/MIN to enter this mode.
2. Press MAX/MIN to step through maximum, minimum and average readings.
3. Press MAX/MIN for 3 seconds to return to normal mode.
Data Hold
Press the HOLD button to freeze the reading in the display. HOLD will appear at the top
right of the display. Press the HOLD button again to return to normal operation mode.
Backlight
Press SETUP button to turn backlight off/on.
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Setup option
The setup option is used to change the thermocouple type, to turn the sleep mode off/on
and to adjust the thermocouple offset.
Note: In the setup mode, the upper display shows menu items and lower display shows
settings.
1. Press the SET button for 3 seconds to enter or exit setup. When the thermometer
is in Setup mode, the display shows SETUP.
Set Type J or K thermocouple
1. Press ▲ or ▼to scroll to the “TYPE” setting (shown bottom left).
2. Press ENTER to choose the option.
3. Press ▼ to toggle between J and K.
4. Press the SET button for 3 seconds to save the setting and return to normal mode.
Set Sleep/Non-sleep mode
The thermometer enters sleep mode by default. The meter will automatically shut off
after 20 minutes if no button press occurs for 20 minutes. When the thermometer is in
Setup mode, the display shows SETUP.
1. Press ▲ or ▼to scroll to the “SLP” setting.
2. Press ENTER to chose the option “
3. Press ▼ to select on or off..
4. Press ENTER to store the new setting in memory.
5. Press SET button for 3 seconds to return to normal mode.
Set Offset
Use the offset option in Setup (T1menu item) to adjust the thermometer’s readings to
compensate for known temperature offset at a specific temperature. The allowable
adjustment range is ± 5.0°C or ± 9.0 °F.
1. Plug the thermocouple into the input connector.
2. Place the thermocouple into the known, stable temperature environment (such as a
ice bath or dry well calibrator). Allow the reading to stabilize.
3. Press ▲ or ▼to scroll to the “T1” option and press ENTER.
4. Change the offset temperature reading (upper display) by pressing ▼until it
reaches the desired temperature.
5. Press SET button for 3 seconds to return to normal mode.
Replacing the Batteries
1. Turn off the thermometer.
2. Loosen the screw and remove the battery door.
3. Replace the AAA batteries.
4. Replace the battery door and tighten the screw.
On” or “OFF” will appear in the display.
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Specifications
Temperature Range:
K type thermocouples -200°C to 1372°C (-328°F to 2501°F)
J type thermocouples -210°C to 1100°C (-346°F to 2012°F)
Temperature accuracy:
T1 Above –100 0C (-148 0F) ± [0.15%rgd+10C (1.8°F)]
T1 Below –100 0C (-148 0F) ± [0.5%rgd+20C (3.6°F)]
Display Resolution: 0.1°C /°F /°K <1000, 1°C /°F /°K >1000
Battery: “AAA “1.5V×3
Operating Temperature: 0°C to +50°C (40°F to +122°F)
Storage Temperature: −10°C to +50°C (14°F to +122°F)
Dimensions: 8.7 x 2.5 x 1.1” (220 x 63 x 28mm)
Weight: 7oz (200g)
Warranty
EXTECH INSTRUMENTS CORPORATION (A FLIR COMPANY) warrants this instrument to be free of
defects in parts and workmanship for one year from date of shipment (a six month limited warranty
applies to sensors and cables). If it should become necessary to return the instrument for service during
or beyond the warranty period, contact the Customer Service Department at (781) 890-7440 ext. 210 for
authorization or visit our website www.extech.com for contact information. A Return Authorization (RA)
number must be issued before any product is returned to Extech. The sender is responsible for shipping
charges, freight, insurance and proper packaging to prevent damage in transit. This warranty does not
apply to defects resulting from action of the user such as misuse, improper wiring, operation outside of
specification, improper maintenance or repair, or unauthorized modification. Extech specifically
disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable
for any direct, indirect, incidental or consequential damages. Extech's total liability is limited to repair or
replacement of the product. The warranty set forth above is inclusive and no other warranty, whether
written or oral, is expressed or implied.
Calibration and Repair Services
Extech offers repair and calibration services for the products we sell. Extech also
provides NIST certification for most products. Call the Customer Care Department for
information on calibration services available for this product. Extech recommends that
annual calibrations be performed to verify meter performance and accuracy.
Technical Support: Extension 200; E-mail: support@extech.com
Repair & Returns: Extension 210; E-mail: repair@extech.com
Product specifications subject to change without notice
For the latest version of this User Guide, Software updates, and other
up-to-the-minute product information, visit our website: www.extech.com
Extech Instruments Corporation, 285 Bear Hill Road, Waltham, MA 02451
Support line (781) 890-7440
Copyright © 2009 Extech Instruments Corporation (a FLIR company)
All rights reserved including the right of reproduction in whole or in part in any form.
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