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MA120 Ver. 1.2    10/2004 

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Introduction 

Congratulations on your purchase of Extech’s MA120 AC/DC Mini Clamp Meter. This professional 
meter, with proper care, will provide years of safe reliable service. 

 

Meter Description 

 

1. Current sense jaw 
2. Non-contact AC voltage indicator light 
3. Flashlight button 
4. Rotary function switch 

5.  Data HOLD and Backlight key 
6. LCD display 
7. Clamp trigger 
8. One-touch DCA ZERO key

 

 

Safety Information 

!

 

Caution!  Refer to the explanation in this Manual 

 
 Double 

Insulation 

 
This meter has been designed to be safe in use, but the operator must use caution in its operation. 
The rules listed below should be carefully followed for safe operation. 
 

1. 

NEVER

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

2. 

USE EXTREME CAUTION

 when working with voltages greater than 60VDC or 25VAC rms. 

These voltages are considerd a shock hazard. 

3. 

NEVER

 operate the meter unless the back cover and the battery/fuse door are in place and 

fastened securely. 

Input Limits 

Function Maximum 

Input 

AC Current 

200A 

DC Current 

±200A 

Frequency 1kHz 

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