INSTRUCTION MANUAL
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Model 381277
DMM Temperature Adapter
1. INTRODUCTION
Congratulations on your purchase of Extech’s DMM Temperature Adapter. This professional
meter, with proper care, will provide years of safe reliable service.
2. SPECIFICATIONS
Temperature Range 0 to 2000oF (-20 to 1370oC)
Output Resolution Adapter output: 1mV per degree C or F
Accuracy +3% to 233oF (112oC) (+5% above 233oF)
Power Supply DC 9V battery (Heavy duty type).
Weight 5 oz. (142 g )
Dimensions 3 x 2 x 1" (76 x 51 x 25 mm)
Accessories Supplied 9V battery and K-type thermocouple
3. ADAPTER DESCRIPTION
1. Standard DMM displaying temperature
2. Temperature Adapter shown connected
to DMM
3. Power status LED
4. Units select switch for degrees C/F
5. Thermocouple sensor shown attached
to Adapter
NOTE: Battery compartment is on rear of
adapter secured by three screws.
4. OPERATION
4.1 Adapter to DMM Connection
Connect the Adapter to the DMM input terminals via the Adapter's output plugs
observing polarity (the output plug polarity is labeled on the adapter). The positive (+)
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Adapter plug connects to the DMM "V" volts input terminal and the Adapter's
negative plug connects to the DMM "COM" (-) input terminal. Power the DMM and set
its function switch to the mV DC range. (Use the VDC setting if mV setting is not
available). If you are using an Auto Range DMM, disable the Auto Range function
and use Manual Range mode.
4.2 Power the Adapter and Select Temperature Units
Move the "OFF/C/F" Switch to either the degrees F or C position as desired. The
Adapter is now powered (observe the red LED power light) and the units of
measure are selected. To remove power to the meter, move this switch to the OFF
position and observe that the red LED indicator extinguishes. If the red status LED
does not light when the meter is switched on, replace battery.
4.3 Measurement Considerations
The supplied Type K Thermocouple can measure temperatures up to 650oF. The
Adapter can accept other thermocouples which can measure higher temperatures
(up to 2000oF). Contact Extech or you local distributor for other thermocouple probe
types.
5. MAINTENANCE
5.1 Battery Replacement
Remove the three (3) Phillips head screws on the rear of the Adapter and open the
housing. Replace the battery and secure the adapter housing.
5.2 Cleaning
Caution: Use only a dry cloth to clean the plastic case.
6. CALIBRATION / REPAIR SERVICES
Extech offers complete repair and calibration services for all of the products we sell. For
periodic calibration, NIST certification or repair of any Extech product, call customer
service for details on services available. Extech recommends that calibration be
performed on an annual basis to insure calibration integrity.
7. WARRANTY
EXTECH INSTRUMENTS CORPORATION 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 on 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. 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.
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