User’s Guide
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Model MA120
200A AC/DC Mini Clamp-on Meter
99 Washington Street
Melrose, MA 02176
Phone 781-665-1400
Toll Free 1-800-517-8431
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
1
2
3
5. Data HOLD and Backlight key
6. LCD display
7. Clamp trigger
8. One-touch DCA ZERO key
4
5
7
8
6
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
Frequency 1kHz
±200A
2
MA120 Ver. 1.2 10/2004
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