Extech Instruments MA220 Manuale utente

User’s Guide

400A AC/DC Clamp Meter

Model MA220

MA220 V1.3 10/06

Introduction

Thank you for selecting the Extech MA200 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 of safe reliable service.

Safety

International Safety Symbols

This symbol, adjacent to another symbol or terminal, indicates the user must

refer to the manual for further information.

This symbol, adjacent to a terminal, indicates that, under normal use,

hazardous voltages may be present

Double insulation

A UL mark does not indicate that this product has been evaluated for the accuracy of its

readings.

SAFETY NOTES

•Do not exceed the maximum allowable input range of any function

•Do not apply voltage to meter when resistance function is selected.

•Set the function switch OFF when the meter is not in use.

•Remove the battery if meter is to be stored for longer than 60 days.

WARNINGS

•Set function switch to the appropriate position before measuring.

•When measuring volts do not switch to current/resistance modes.

•Do not measure current on a circuit whose voltage exceeds 240V.

•When changing ranges using the selector switch always disconnect the test leads

from the circuit under test.

•Do not exceed the maximum rated input limits.

OVERVOLTAGE CATEGORY III

This meter meets the IEC 610-1-95 standard for OVERVOLTAGE CATEGORY III. Cat III

meters are protected against overvoltage transients in fixed installation at the distribution

level. Examples include switches in the fixed installation and some equipment for industrial

use with permanent connection to the fixed installation.

MA220 V1.3 10/06

Specifications

Function Range Accuracy (of

reading)

0-20.00 ADC ± (2.5% + 6 digits)

40.00 ADC

20.00-40.00 ADC ± (3% + 6 digits)

0-300.0 ADC ± (2.5% + 6 digits)

DC Current

400.0 ADC

300.0-400.0 ADC ± (3.5% + 6 digits)

0-20.00 AAC ± (3% + 10 digits)

40.00 AAC

20.00-40.00 AAC ± (5% + 10 digits)

0-300.0 AAC ± (3% + 10 digits)

AC Current

400.0 AAC

300.0-400.0 AAC ± (5% + 10 digits)

400.0mV ± (0.8% + 3 digits)

4.000V

40.00V

400.0V

± (1.5% + 3 digits)

DC Voltage

600V ± (2.0% + 3 digits)

400.0mV ± (1% + 10 digits)

4.000V

40.00V

400.0V

± (2% + 5 digits)

AC Voltage

600V ± (2% + 5 digits)

400.0Ω± (1.0% + 4 digits)

4.000kΩ

40.00kΩ

400.0kΩ

± (1.5% + 2 digits)

4.000 MΩ± (2.5% + 3 digits)

Resistance

40.00MΩ± (3.5% + 5 digits)

40.00nF ± (5% + 30 digits)

400.0nF ± (3% + 5 digits)

4.000µF

40.00µF

± (3.5% + 5 digits)

Capacitance

100.0µF ± (5% + 5 digits)

5.000Hz ± (1.5% + 5 digits)

50.00Hz

500.0Hz

5.000KHz

50.00KHz

Frequency

150.0KHz

± (1.2% + 2 digits)

Sensitivity: 5~5KHz:

10Vrms min.

5KHz~150KHz:

40Vrms min.

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

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

-50.0 to -20.0°C ± 7°C

-50.0 to 400.0°C

-20.0 to 400.0°C

400 to 1000°C 400 to 1000°C ± (3% + 5 °C)

-58.0 to 0°F ± 14°F

-58.0 to 400.0°F

0 to 400.0°F ± (2.5% + 6 digits)

Temperature

400 to 1832°F 400 to 1832°F ± (3% + 7°F)

MA220 V1.3 10/06

Jaw size 0.9" (23mm) approx.

Display 4000 count LCD

Continuity Audible tone < 150Ωapprox.

Diode Test Open circuit voltage < 1.5VDC;

Test current 0.3mA (typical)

AC V bandwidth 50Hz to 400Hz

AC A bandwidth 50/60Hz

Low battery indication “ ” is displayed

Overrange indication “OL” is displayed

Auto Power OFF After 30 minutes

Measurement rate 2 per second, nominal

Input Impedance 7.8MΩ(V DC and V AC)

Operating Temperature 41ºF to 104ºF (5ºC to 40ºC)

Storage Temperature -4oF to 140oF (-20oC to 60oC)

Operating Humidity Max 80% up to 87ºF (31ºC) decreasing linearly to 50% at

113ºF(45ºC)

Storage Humidity <80%

Operating Altitude 6560ft. (2000meters) operating

Batteries (2) 1.5V AAA batteries

Weight 0.44lb (200g)

Size 7.87” x 1.97” x 1.38” (200x50x35mm)

Safety For indoor use and in accordance with the requirements for

double insulation to IEC1010-1 (1995): EN61010-1 (1995)

Overvoltage Category III, Pollution Degree 2.

MA220 V1.3 10/06

Meter Description

1. Conductor jaws

2. Jaw opening trigger

3. Function select switch

4. LCD Display

5. ZERO button

6. Data Hold and Backlight Button

7. Mode select button

8. Range select button

9. Hz/%/Duty Cycle button

10. COM input jack

11. V/Ω/Temp jack

12. Battery cover (rear)

AC AC (alternating current)

DC DC (direct currrent)

Minus sign

AUTO AutoRange mode

ZERO ZERO mode

•))) Audible Continuity

HOLD Data Hold mode

Low Battery icon

Diode test mode

m milli

VVolts

AAmps

Kkilo

MMega

ΩOhms

°F Degrees Fahrenheit

°C Degrees Centigrade

MA220 V1.3 10/06

Operation

Notice: Read and understand all WARNING and CAUTION statements listed in the

safety section of this operation manual prior to using this meter. Set the function select

switch to the OFF position when the meter is not in use.

DC/AC Current Measurements

Warning: Disconnect the test leads from the meter before making

current clamp measurements.

1. Set the Function switch to the 400ADC, 40ADC, 400AAC or

40AAC range. If the range of the measured is not known, select

the higher range first then move to the lower range if necessary.

2. For DC current measurement, press the ZERO key to null the

meter display.

3. Press the trigger to open jaw. Fully enclose one conductor to be

measured.

4. The clamp meter LCD will display the reading.

DC/AC Voltage Measurements

1. Set the rotary function switch to the Volts/Hz/% position.

2. Insert the black test lead banana plug into the negative (COM) jack and the red test lead

banana plug into the positive (V/Ω/Temp) jack

3. Select AC or DC with the MODE button

4. Connect the test leads to the circuit under test

5. Read the voltage on the display. The display will indicate the proper decimal point and

value.

Resistance Measurements

1. Set the function switch to the Ω•))) CAP position.

2. Insert the black test lead banana plug into the negative (COM) jack

Insert the red test lead banana plug into the positive (VΩTemp)jack.

3. Touch the test probe tips across the circuit or part under test. It is best to disconnect one

side of the part under test so the rest of the circuit will not interfere with the resistance

reading.

4. Read the resistance on the display. The display will indicate the proper decimal point and

value.

Continuity Check

1. Set the function switch to the Ω•))) CAP position.

2. Push the mode button to indicate •))) on the display.

3. Insert the black lead banana plug into the negative (COM) jack

Insert the red test lead banana plug into the positive (VΩ) jack.

4. Touch the test probe tips to the circuit or wire you wish to check.

5. If the resistance is less than approximately 150Ω, the audible signal will sound. If the

circuit is open, the display will indicate “OL.”.

MA220 V1.3 10/06

Diode Test

1. Turn the rotary switch to the Ω•))) CAP position.

2. Insert the black test lead banana plug into the negative (COM) jack and the red test lead

banana plug into the positive (VΩ) jack.

3. Push the mode button to indicate on the display.

4. Touch the test probes to the diode under test. Typically for a normal diode, forward

voltage will indicate 0.4V to 0.7V. Reverse voltage will indicate “OL”. Shorted devices will

indicate near 0V and an open device will indicate “OL” in both polarities.

Capacitance Measurements

Warning: To avoid electrical shock, disconnect power to the unit under test and

discharge all capacitors before taking any capacitance measurements. Remove the

batteries and unplug the line cords.

1. Set the function switch to the Ω•))) CAP position.

2. Push the mode button to indicate nF on the display.

3. Insert the black lead banana plug into the negative (COM) jack and

insert the red test lead banana plug into the positive (VΩTemp) jack.

4. Press the ZERO key to null the meter display.

5. Touch the test probe tips to the capacitor you wish to check.

6. Read the capacitance value on the display.

Frequency or % Duty Cycle Measurements

1. Turn the rotary switch to the Volts Hz % position.

2. Insert the black test lead banana plug into the negative (COM) jack and the red test lead

banana plug into the positive (VΩ) jack.

3. Select Hz or % with the HZ/% button.

4. Touch the test probe tips to the circuit under test.

5. Read the frequency on the display.

MA220 V1.3 10/06

Temperature Measurements

1. Turn the rotary switch to the Temp position.

2. Insert the Temperature Probe into the negative (COM) and the (VΩTemp)jacks, making

sure to observe correct polarity.

3. Select °C or °F with the MODE button.

4. Touch the temperature probe head to the part whose temperature you wish to measure.

Keep the probe touching the part under test until the reading stabilizes.

5. Read the temperature on the display.

Warning: To avoid electrical shock, be sure the thermocouple has been removed before

changing to another measurement function.

Auto/Manual Ranging

The meter turns on in Autoranging mode. Press the RANGE button to enter manual

ranging. Each press of the range button will step to the next range as indicated by the units

and decimal point location. Press and hold the RANGE button for two seconds to return to

Autoranging mode.

Note: Manual ranging does not function in AC Current or Diode and Continuity check

functions. In Temperature function, it will change the resolution from 0.1° to 1°.

Data Hold

To freeze the LCD meter reading, press the HOLD button. While data hold is active, the

HOLD display icon appears on the LCD. Press the HOLD button again to return to normal

operation.

Backlight

Press and hold the HOLD button for >2 seconds to turn the backlight on/off.

Note: The HOLD feature will activate when the backlight is turned on. Press the HOLD

button again to exit the Hold feature.

Zero Button

Zeros Capacitance and DC Current measurements. Also allows the user to offset the

meter by using the displayed value as the zero reference value. Press the ZERO key

momentarily to activate and to exit Zero mode.

MA220 V1.3 10/06



Support Hotline (781) 890-7440

Tech support: Ext. 200; Email: [email protected]

Repair/Returns: Ext. 210; Email: r[email protected]

Website: www.extech.com

Maintenance

WARNING: To avoid electrical shock, disconnect the meter from any circuit, remove the

test leads from the input terminals and turn OFF the meter before opening the case. Do

not operate with open case.

Cleaning and Storage

Periodically wipe the case with a damp cloth and mild detergent; do not use abrasives or

solvents. If the meter is not to be used for periods of longer than 60 days, remove the

batteries and store them separately

Battery Replacement

1. Remove the two rear Phillips head screws

2. Open the battery compartment

3. Replace the two 1.5V AAA batteries.

4. Re-assemble the meter

Warranty

EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and

workmanship for one year from date ofshipment (a sixmonth limited warranty applies onsensors 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. 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.

Repair and Calibration Services

Extech offers complete repair and calibration services for all Extech products. For

periodic calibration, NIST certification or repair of any Extech product, call customer service

for details on services available. Extech recommends that calibration be performed on an

annual basis to insure calibration integrity.

including the right of reproduction in whole or in part in any form.

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