Extech Instruments MA220 User Manual

User’s Guide

400A AC/DC Clamp Meter

Model MA220

MA220-EU-EN V1.5 7/09

2

Introduction

Thank you for selecting the Extech MA220 AC/DC Clamp Meter. This meter measures
AC/DC Current, AC/DC Voltage, Resistance, Capacitance, Frequency, Duty Cycle,
Temperature, Diode Test, and Continuity. This professional meter, with proper care, will
provide years ofsafe reliable service.

Safety

International Safety Symbols

This symbol, adjacentto another symbol or terminal,indicates the user must
refer to the manual for further information.

This symbol, adjacentto a terminal, indicates that, undernormal use,
hazardous voltages may be present

Double insulation

SAFETY NOTES

 Do not exceed the maximum allowableinput range of any function
 Do not apply voltage tometer when resistance function is selected.
 Set the function switch OFF whenthe meter isnot in use.
 Remove the battery if meter isto be stored for longer than 60 days.

WARNINGS

 Set function switch to the appropriateposition before measuring.
 When measuring volts do not switch to current/resistancemodes.
 Do not measure current ona circuit whosevoltage exceeds 240V.
 When changing ranges using the selectorswitch always disconnect the test leads

from the circuit under test.

 Do not exceed the maximum ratedinput limits.

OVERVOLTAGE CATEGORY III

This meter meets the IEC 610-1-95 standard for OVERVOLTAGE CATEGORY III. Cat III
meters are protectedagainst overvoltage transients in fixed installation at the distribution
level. Examples include switches in thefixed installation andsome equipment for industrial
use with permanentconnection to the fixed installation.

MA220-EU-EN V1.5 7/09

3

Specifications

Function

Range

Accuracy (of

reading)

DC Current 40.00 ADC

0-20.00 ADC ± (2.5% + 6 digits)

20.00-40.00 ADC ± (3% + 6 digits)

400.0 ADC

0-300.0 ADC ± (2.5% + 6 digits)

300.0-400.0 ADC ± (3.5% + 6 digits)

AC Current 40.00 AAC

0-20.00 AAC ± (3% + 10 digits)

20.00-40.00 AAC ± (5% + 10 digits)

400.0 AAC 0-300.0 AAC ± (3% + 10 digits)

300.0-400.0 AAC ± (5% + 10 digits)

DC Voltage

400.0mV± (0.8% + 3

digits)4.000V

± (1.5% + 3 digits)40.00V

400.0V
600V ± (2.0% + 3 digits)

AC Voltage 400.0mV ± (1% + 10 digits)

4.000V
± (2% + 5 digits)40.00V

400.0V

600V ± (2% + 5 digits)

Resistance

400.0



± (1.0% + 4 digits)

4.000k
± (1.5% + 2 digits)

40.00k

400.0

k



4.000 M

± (2.5% + 3 digits)

40.00M

± (3.5% + 5 digits)

Capacitance 40.00nF ± (5% + 30 digits)

400.0nF ± (3% + 5 digits)

4.000µF ± (3.5% + 5 digits)

40.00µF

100.0µF ± (5% + 5 digits)

Frequency

5.000Hz

± (1.5% + 5

digits)

50.00Hz

± (1.2% + 2 digits)
Sensitivity: 5~5KHz:
10Vrms min.
5KHz~150KHz:
40Vrms min.

500.0Hz

5.000KHz

50.00KHz

150.0KHz

Duty Cycle 0.5% to 99.0% ± (1.2% + 2 digits)

Pulse Width: 100µs-100ms,Frequency: 5Hz to 150KHz

Temperature -50.0 to 400.0°C

-50.0 to -20.0°C ± 7°C

-20.0 to 400.0°C
± (3% + 5 °C)

400 to 1000°C

400 to 1000°C

-58.0 to 400.0°F

-58.0 to 0°F ± 14°F

0 to 400.0°F ± (2.5% + 6 digits)

400 to 1832°F

400 to 1832°F ± (3% + 7°F)