Extech Instruments MA150-T User manual

USER MANUAL

Model MA150

200A AC Mini Clamp-on Meter

AdditionalUserManualTranslationsavailableatwww.extech.com

MA150-en-GB_V2.4 1/17

Introduction

Thank you for selecting the Extech MA150 AC Mini Clamp Meter. This device is shipped fully tested

and calibrated and, with proper use, will provide years of reliable service. Please visit our website

(www.extech.com) to check for the latest version and translations of this User Manual, Product

Updates, Product Registration, and Customer Support.

Meter Description

1. Current sense jaw

2. Non-contact AC voltage indicator light

3. Flashlight button

4. Rotary function switch

5. MAX hold and Backlight key

6. LCD display

7. Clamp trigger

8. MODE key

9. COM input jack

10. V Ωinput jack

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

AC/DC Voltage 600V AC/DC

Resistance, Diode, Continuity Test 600V AC/DC

MA150-en-GB_V2.4 1/17

Operation

AC Current Measurements

1) Set the Function switch to the 200A AC range.

2) Press the jaw trigger and clamp around, fully enclosing a single conductor.

Do not allow a gap between the two halves of the jaw. Refer to the diagram

at right for the correct way to enclose a single conductor.

3) Read the ACA value on the LCD.

AC/DC Voltage Measurements

1) Insert the black test lead into the negative COM terminal and the red test lead into the positive V

terminal.

2) Set the function switch to the V position.

3) Select AC or DC with the MODE button.

4) Connect the test leads in parallel to the circuit under test.

5) Read the voltage measurement on the LCD display.

Resistance and Continuity Measurements

1) Insert the black test lead into the negative COM terminal and the red test lead into the positive V

Ωterminal.

2) Set the function switch to the Ω position.

3) Use the MODE button to select resistance. The MΩicon will appear in the display.

4) Touch the test leads across the circuit or component under test. It is best to disconnect one side

of the device under test so the rest of the circuit will not interfere with the resistance reading.

5) For Resistance tests, read the resistance on the LCD display

6) For Continuity, use the MODE button to select continuity “)))”. The display icons will change

when the MODE button is pressed.

7) If the resistance is <120 Ωthe meter’s beeper will sound.



Diode Test

1) Insert the black test lead banana plug into the negative COM jack and the red test lead banana

plug into the positive V Ωjack.

2) Set the function switch to the Ωposition.

3) Press the MODE button to indicate on the display.

4) Touch the test probes to the diode under test. Forward voltage will typically indicate 0.400 to

0.700V. Reverse voltage will indicate “OL”. Shorted devices will indicate near 0V and an open

device will indicate “OL” in both polarities.

Yes

MA150-en-GB_V2.4 1/17

Non-Contact AC Voltage Detection

1) AC Voltage detection operates on any of the three Function switch positions.

2) Touch the probe tip to the hot conductor or insert into the hot side of the electrical outlet.

3) If AC voltage is present, the detector light will illuminate.

NOTE: The conductors in electrical cord sets are often twisted. For best results, slowly slide the

probe tip along a length of the cord to assure placing the tip in close proximity to the live

conductor.

NOTE: The detector is designed with high sensitivity. Static electricity or other sources of energy

may randomly turn the detector light on. This is normal operation

MAX Hold

To hold the highest reading on the LCD, short press the “MAX ” key. The meter reading will not

change as readings change, rather it will only display the highest reading encountered since the MAX

hold button was pressed. Press the MAX hold button again to return the meter to normal operation.

Backlight

Press and hold the “MAX ” key for more than one second to turn the backlight on. This will also

activate the MAX Hold function. To release the MAX Hold function and return the meter to normal

operation, short press the “MAX ” key. The backlight will automatically turn off after 15 seconds. To

manually turn off the backlight, press and hold the “MAX ” key for more than 1 second.

Flashlight

Press and hold the top button to turn the flashlight on. Release the button to turn the flashlight off.

WARNING: Risk of Electrocution. Before use, always test the Voltage Detector on a

known live circuit to verify proper operation

MA150-en-GB_V2.4 1/17

Specifications

General Specifications

Display 2000 count Digit LCD with white LED backlight

Polarity Minus sign (-) indicates negative polarity

Jaw opening 18mm (0.7”)

Current sensor Hall effect sensor type

AC Current Bandwidth 50/60Hz

AC Voltage Bandwidth 50/400Hz

Overload indication “OL” displayed on the LCD

Display rate 2 readings/second, nominal

Battery Two 1.5V AAA batteries

Low Battery indication “BATT” displayed on the LCD

Auto Power off approx. 15 minutes

Operating conditions 0 to 30ºC (32 to 86ºF) 90%RH; 30 to 40ºC (86 to 104ºF) 75%RH; 40 to

50ºC (104 to 122ºF) 45%RH

Storage conditions -30 to 60ºC (-14 to 140ºF); < 90% Relative Humidity

Altitude Operate at less than 3000 meters

Weight 176g (6.2 oz.) including battery

Dimensions 164 x 65 x 32mm (6.5 x 2.6 x 1.3”) (HWD)

Standards For indoor use and in accordance with the requirements for double

insulation to IEC1010-1 (1995): EN61010-1 (1995) Overvoltage Category

III 300V and Category II 600V, Pollution Degree 2.

MA150-en-GB_V2.4 1/17

Range Specifications

Function Range Resolution Accuracy (of reading)

AC Current 200.0A 0.1A ± (2.5% rdg + 10 digits)

DC Voltage 200.0mV 0.1mV ±(0.5% rdg + 5 digits)

2.000V 1mV

±(1.2% rdg + 3 digits)

20.00V 10mV

200.0V 0.1V

600V 1V ±(1.5% rdg + 3 digits)

AC Voltage 2.000V 1mV

±(1.5% rdg + 3 digits)

20.00V 10mV

200.0V 0.1V

600V 1V ±(2.0% rdg + 4 digits)

Resistance 200.0Ω0.1Ω±(1.0% rdg + 4 digits)

2.000kΩ1Ω

±(1.5% rdg + 2 digits)

20.00kΩ10Ω

200.0kΩ



100Ω

2.000MΩ1kΩ±(2.0% rdg + 3 digits)

20.00MΩ10kΩ±(3.0% rdg + 5 digits)

Non-Contact AC Voltage 100VAC to 600VAC 50/60Hz

Diode Test Test current: 0.3mA typical;

Open circuit voltage: 1.5VDC typical

Continuity Threshold <120Ω

Test current <1mA

MA150-en-GB_V2.4 1/17

Maintenance

WARNING:Toavoidelectricalshock,removethetestleads,disconnectthemeterfrom

anycircuitandturnOFFthemeterbeforeopeningthecase.Donotoperatewithanopencase.

Battery Replacement

1) When the low battery symbol appears on the LCD the batteries must be replaced.

2) Power down and remove the Phillips head screw that secures the battery compartment at the

back of the meter.

3) Open the battery compartment and replace the two 1.5V AAA batteries observing correct

polarity. Re-assemble the meter before use.

Safety: Please dispose of batteries responsibly; never dispose of batteries in a fire, batteries may

explode or leak. If the meter is not to be used for 60 days or more, remove the battery and store

separately.

Never dispose of used batteries or rechargeable batteries in household waste.

As consumers, users are legally required to take used batteries to appropriate collection

sites, the retail store where the batteries were purchased, or wherever batteries are sold.

Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end-of-

life devices to a designated collection point for the disposal of electrical and electronic equipment.

Allrightsreservedincludingtherightofreproductioninwholeorinpartinanyform

ISO‐9001Certified

www.extech.com

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