Extech MN42 Digital-Multimeter, DMM, 2000 counts CAT III 600 V MN42 Scheda Tecnica

MN42-EU - V1.1 – 07/2010 

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Congratulations on your purchase of the Extech MN42 MultiMeter. The MN42 offers AC/DC 
Voltage, DC Current, and Resistance testing. Proper use and care of this meter will provide 
many years of reliable service. 

This symbol adjacent to another symbol, terminal or operating device 

indicates that the operator must refer to an explanation in the Operating 

Instructions to avoid personal injury or damage to the meter. 
This WARNING symbol indicates a potentially hazardous situation, which 

if not avoided, could result in death or serious injury. 
This CAUTION 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 point at which the voltage with respect to earth 

ground exceeds 600VAC or VDC. 
This symbol adjacent to one or more terminals identifies them as being 

associated with ranges that may, in normal use, be subjected to 

particularly hazardous voltages. For maximum safety, the meter and its 

test leads should not be handled when these terminals are energized. 
This symbol indicates that a device is protected throughout by double 

insulation or reinforced insulation. 
 

 

 
 

This meter has been designed for safe use, but must be operated with caution. The rules 
listed below must be carefully followed for safe operation. 

1. 

 apply voltage or current to the meter that exceeds the specified maximum: 

V DC or V AC 

600V AC and DC 200Vrms on the 200mV range 

mA DC 

200mA DC 250V fast acting fuse 

ADC 

10A 250V fast acting fuse  
(30 seconds max every 15 minutes) 

Resistance, Continuity 

250Vrms 15 seconds max 

2. 

 when working with high voltages. 

3. 

 measure voltage if the voltage on the "COM" input jack exceeds 500V above 

earth ground. 

4. 

 connect the meter leads across a voltage source while the function switch is in 

the current, resistance, or diode mode. Doing so can damage the meter. 

5. 

 discharge filter capacitors in power supplies and disconnect the power when 

making resistance or diode tests. 

6. 

 turn off power and disconnect test leads before opening the covers to replace 

the fuse or battery. 

7. 

 operate the meter unless the back cover and the battery and fuse covers are in 

place and fastened securely. 

8. 

If the equipment is used in a manner not specified by the manufacturer, the protection 
provided by the equipment may be impaired.