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MN25 Version 2.2 Aug 2003 

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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 or visit our website at www.extech.com (click 
on ‘Contact Extech’ and go to ‘Service Department’ to request an RA 
number). 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. 

Introduction 

Congratulations on your purchase of Extech’s MN25Multimeter. 
This meter measures AC/DC Voltage, AC/DC Current, 
Resistance, Capacitance, Frequency, Duty Cycle, Temperature, 
Diode Test and Continuity. Proper use and care of this meter will 
provide many years of reliable service. 

Summary of Contents for MN25

Page 1: ...User s Guide MiniTecTM Series Model MN25 MultiMeter...

Page 2: ...r 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 maintenanc...

Page 3: ...0 seconds max every 15 minutes Resistance Continuity 250Vrms for 15sec max 2 USE EXTREME CAUTION when working with high voltages 3 DO NOT measure voltage if the voltage on the COM input jack exceeds 5...

Page 4: ...N symbol indicates a potentially hazardous situation which if not avoided may result damage to the product This symbol advises the user that the terminal s so marked must not be connected to a circuit...

Page 5: ...0 reading 2 digits 200mA 100 A 1 8 reading 5 digits AC Current A AC 10A 10mA 3 0 reading 5 digits 200 0 1 2000 1 20k 0 01k 200k 0 1k 0 8 reading 2 digits Resistance 2000k 1k 1 0 reading 2 digits 9V 10...

Page 6: ...al Low Battery Indication BAT is displayed if battery voltage drops below operating voltage Battery 9 Volt Battery Fuses mA A ranges 0 2A 250V fast blow A range 10A 250V fast blow Operating Temperatur...

Page 7: ...e jack Note Tilt stand fuse and battery compartment are on rear of unit LCD Display Indicators Continuity Diode test m milli volts amps k kilo ohms ohms V DC volts direct current V AC volts alternatin...

Page 8: ...roper measurement when connected to a circuit DC Voltage Measurements CAUTION Do not measure DC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can d...

Page 9: ...N Do not measure AC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function switch to the highest VAC position 2 Inse...

Page 10: ...and insert the red test lead banana plug into the mA jack 3 For current measurements up to 10A DC set the function switch to the 10A range and insert the red test lead banana plug into the 10A jack 4...

Page 11: ...ition and insert the red test lead banana plug into the mA jack 3 For current measurements up to 10A AC set the function switch to the 10A range and insert the red test lead banana plug into the 10A j...

Page 12: ...of the circuit will not interfere with the resistance reading 4 Read the resistance in the display and then set the function switch to the lowest position that is greater than the actual or any antic...

Page 13: ...orted devices will indicate near 0mV and an open device will indicate I in both polarities Continuity Check WARNING To avoid electric shock never measure continuity on circuits or wires that have volt...

Page 14: ...ry into battery holder observing polarity 5 Put the battery door back in place Secure with the screw Fuse Replacement WARNING To avoid electric shock disconnect the test leads from any source of volta...

Page 15: ...bration services for the products we sell Extech also provides NIST certification for most products Call the Customer Service Department for information on calibration services available for this prod...

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