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This instrument is a 3200 count pen style digital 
multimeter. It can be used for measuring AC or DC 
voltage, AC or DC current, resistance, diodes and 
continuity. It can also be used as a logic test pen. The 
measuring ranges are changed automatically or can 
be manually set. All measurements are displayed with 
0.6 inch high characters with full parameter symbols. 
This meter is easily operated and all ranges have 
overload protection. It is an ideal instrument for use in 
the home, factory, school and laboratory. The DMM is 
for indoor use only. It is UL 1244 listed. 
 
 
 
 

WARNING:

  

USE EXTREME CAUTION IN THE USE OF 

THIS DEVICE. 

 Improper use of this device can result 

in injury or death. Follow all safeguards suggested in 
this manual. In addition to the normal safety 
precautions used in working with electrical circuits.  
DO NOT service this device, if you are not qualified to 
do so. 

 
 
EXTECH INSTRUMENTS CORPORATION warrants this 
instrument to be free of defects in parts and 
workmanship for one year from date of shipment. 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 
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. 

Summary of Contents for 381626

Page 1: ...Pen Multimeter Model 381626 CAUTION Read understand and follow all Safety Rules and Operating Instructions in this manual before using this product ...

Page 2: ...vice if you are not qualified to do so EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment 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 for authorization A Return Authorization RA number must be issu...

Page 3: ...esponse DC Current 30 300mA 10µA 1 5 reading 3 digits 40Hz to 400Hz AC Current 30 300mA 10µA 2 0 reading 5 digits Average responding Resistance 300 3k 30k 300kΩ 3MΩ 30MΩ 0 1 ohms 1 5 reading 5 digits 2 0 reading 8 digits 3 0 reading 10 digits Overload Protection 250VAC rms Open ckt V 0 6V 1 2V Continuity Buzzer sounds for resistance less than 20 ohms approximately Logic 1V Logic low 1V to 2V Indet...

Page 4: ... voltages 3 DO NOT measure voltage above 500V DC or AC rms 4 ALWAYS turn off the power and disconnect the test leads before replacing the fuse or battery FUNCTIONAL DESCRIPTION 1 Data Hold Button 2 Range Hold Button 3 DC AC Button 4 Function Switch 5 Green LED 6 Red LED 7 Common Terminal 8 Positive Test Probe 9 Battery Fuse Door 10 LCD Display Bargraph 11 Function Switch Settings Switch Button V Ω...

Page 5: ...it will be canceled automatically if the Function switch is changed to another position OPERATION CAUTION This meter is a precision electronic instrument To avoid damaging the unit observe all safety statements contained in this manual DC or AC Voltage Measurement 1 Connect the black test lead to the COM jack 2 Set the Function Switch to the V position and select AC or DC 3 Connect the positive te...

Page 6: ... test probe is Diode Test 1 Connect the black test lead to the COM jack 2 Set the Function Switch to the position and select with Button 3 3 Connect the positive test probe and the black test lead across the diode under test If the positive test probe is placed on the anode of the diode the display will indicate the approximate forward voltage drop of the diode Logic Test 1 Connect the black test ...

Page 7: ...eplacement NOTE Do not operate the instrument or connect the test lead or probe to any circuit with the rear cover open 1 Remove the screw and open the battery door Replace the old batteries or the blown fuse with the same type Fuse 800mA 250V fast blow type Battery Two 1 5V AAA or UM 4 type ...

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