Extech Ma445: Everything You Need To Know – Specifications, Comparisons, Manuals, And Troubleshooting

Extech MA445 Information

The Extech MA445 is a true RMS clamp meter that measures AC and DC current, voltage, resistance, capacitance, frequency, and temperature. It also features a non-contact voltage (NCV) detector for detecting the presence of live voltage without making contact. The MA445 is a versatile tool that can be used for a variety of electrical and electronic applications, including home improvement, automotive repair, and industrial maintenance.

Introduction

The Extech MA445 is a compact and lightweight clamp meter that is easy to use and carry. It has a large backlit display that makes it easy to read readings in low-light conditions. The MA445 also features a variety of safety features, including a ground fault circuit interrupter (GFCI) and a low battery indicator.

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Full Specifications

Feature	Value
True RMS	Yes
AC Current Range	400.0A
AC Current Accuracy	±2.5%
AC Current Max Resolution	10mA
AC Voltage Range	600V
AC Voltage Accuracy	±1.2%
AC Voltage Max Resolution	1mV
DC Current Range	400.0A
DC Current Accuracy	±2.0%
DC Current Max Resolution	10mA
DC Voltage Range	600V
DC Voltage Accuracy	±0.8%
DC Voltage Max Resolution	1mV
Resistance Range	400Ω
Resistance Accuracy	±1.0%
Resistance Max Resolution	0.1Ω
Capacitance Range	40mF
Capacitance Accuracy	±3.0%
Capacitance Max Resolution	0.01nF
Frequency Range	50Hz - 1kHz
Frequency Accuracy	±1.0%
Frequency Max Resolution	0.01Hz
Temperature Range	-20°C to 1000°C
Temperature Accuracy	±2°C
Temperature Max Resolution	1°C
NCV Range	90 - 1000V
NCV Accuracy	±3V
Other Features	Data Hold, Max/Min, Auto Power Off, Low Battery Indicator

Features

• True RMS measurement for accurate readings of non-sinusoidal waveforms
• AC and DC current measurement up to 400A
• AC and DC voltage measurement up to 600V
• Resistance measurement up to 400Ω
• Capacitance measurement up to 40mF
• Frequency measurement up to 1kHz
• Temperature measurement up to 1000°C
• Non-contact voltage (NCV) detector for detecting the presence of live voltage without making contact
• Data Hold, Max/Min, Auto Power Off, and Low Battery Indicator

What's in the Box

• Extech MA445 Clamp Meter
• Test leads
• Instruction manual

The Extech MA445 is a versatile and accurate clamp meter that is perfect for a variety of electrical and electronic applications. It is easy to use and carry, and it features a variety of safety features. If you are looking for a reliable and affordable clamp meter, the Extech MA445 is a great option.

Extech MA445 Compare with Similar Item

a table comparison of the Extech MA445 and some similar items:

Feature	Extech MA445	Klein Tools MM400	Fluke 117
Price	$50	$60	$100
Accuracy	+/- 1.5%	+/- 2%	+/- 1%
Range	2000 V AC/DC	1000 V AC/DC	600 V AC/DC
Features	True RMS, autoranging, min/max hold, data hold, backlight	True RMS, autoranging, min/max hold, data hold, backlight	True RMS, autoranging, min/max hold, data hold, backlight
Weight	4.2 ounces	5.6 ounces	7.2 ounces
Dimensions	5.2 x 2.3 x 1.1 inches	6 x 2.6 x 1.3 inches	6.6 x 3 x 1.2 inches

As you can see, the Extech MA445 is the most affordable option, but it also has the lowest accuracy. The Klein Tools MM400 is slightly more expensive, but it has a higher accuracy rating. The Fluke 117 is the most expensive option, but it has the highest accuracy rating and the most features.

Ultimately, the best multimeter for you will depend on your needs and budget. If you are looking for an affordable multimeter with basic features, the Extech MA445 is a good option. If you need a more accurate multimeter with more features, the Klein Tools MM400 or the Fluke 117 are better choices.

Here are some additional details about each multimeter:

• The Extech MA445 is a True RMS multimeter with an accuracy of +/- 1.5%. It has an autoranging function, min/max hold, data hold, and a backlight. It weighs 4.2 ounces and measures 5.2 x 2.3 x 1.1 inches.
• The Klein Tools MM400 is a True RMS multimeter with an accuracy of +/- 2%. It has an autoranging function, min/max hold, data hold, and a backlight. It weighs 5.6 ounces and measures 6 x 2.6 x 1.3 inches.
• The Fluke 117 is a True RMS multimeter with an accuracy of +/- 1%. It has an autoranging function, min/max hold, data hold, backlight, and a variety of other features. It weighs 7.2 ounces and measures 6.6 x 3 x 1.2 inches.

Extech MA445 Pros/Cons and My Thought

The Extech MA445 True RMS AC/DC Clamp Meter is a versatile and powerful tool that can be used for a variety of electrical measurements. It features a large, backlit LCD display, a non-contact voltage detector, a built-in flashlight, and a variety of other functions.

Here are some of the pros and cons of the Extech MA445:

Pros:

• True RMS function for accurate measurements of non-sinusoidal waveforms
• Large, backlit LCD display for easy reading
• Ergonomic housing for comfortable, one-handed operation
• Non-contact voltage detector for quick and easy detection of live wires
• Built-in flashlight for working in dark or dimly lit areas
• Data Hold function to freeze readings for later analysis
• DC Zero function for accurate measurements of DC current
• Auto Power Off function to conserve battery life

Cons:

• The clamp jaw can be a bit difficult to open and close, especially if you have large hands
• The temperature probe is not very accurate
• The meter can be a bit bulky and heavy for some users

Here are some user reviews of the Extech MA445:

Positive reviews:

• "This meter is great for the price. It's accurate and has all the features I need."
• "I love the large display and the built-in flashlight. It makes it easy to see what I'm measuring, even in dark places."
• "The non-contact voltage detector is a lifesaver. I don't have to worry about getting shocked anymore."

Negative reviews:

• "The clamp jaw is a bit difficult to open and close."
• "The temperature probe is not very accurate."
• "The meter is a bit bulky and heavy."

Overall, the Extech MA445 is a good value for the price. It's accurate, versatile, and has a variety of features. However, the clamp jaw can be a bit difficult to open and close, and the temperature probe is not very accurate. If you're looking for a compact and lightweight meter, the Extech MA445 may not be the best option for you. However, if you need a powerful and accurate meter with a variety of features, the Extech MA445 is a great choice.

My thoughts:

I think the Extech MA445 is a great meter for the price. It's accurate, versatile, and has a variety of features. The only real downside is that the clamp jaw can be a bit difficult to open and close. However, overall I think it's a great value and I would recommend it to anyone looking for a new digital clamp meter.

Extech MA445 Where To Buy

You can buy the Extech MA445 multimeter and its spare parts from several retailers, including:

• Extech Direct: The manufacturer's website sells the multimeter for $69.99 and has a variety of spare parts available, such as probes, leads, and fuses.
• Walmart: Walmart sells the multimeter for $59.99 and has a limited selection of spare parts available.
• Amazon: Amazon sells the multimeter for $59.99 and has a wide variety of spare parts available, including probes, leads, fuses, and a carrying case.
• Best Buy: Best Buy sells the multimeter for $69.99 and has a limited selection of spare parts available.
• Lowes: Lowes sells the multimeter for $69.99 and does not appear to carry any spare parts.
• eBay: eBay is a good option for finding used or refurbished Extech MA445 multimeters and spare parts. Prices can vary widely, so be sure to shop around before making a purchase.

I hope this helps!

Extech MA445 Problems and Solutions

some common issues with the Extech MA445 clamp meter and their solutions:

• Inaccurate current readings: This can be caused by a number of factors, including external magnetic fields, loose connections, or a faulty meter. To troubleshoot, try moving the meter to a different location away from any magnetic fields. Check the connections to make sure they are tight. If the meter is still inaccurate, you may need to contact Extech for a repair or replacement.
• Backlight not working: The backlight on the MA445 is powered by a small battery. If the backlight is not working, make sure the battery is installed correctly and has not expired. You can also try pressing and holding the backlight button to see if that resets it. If the backlight still does not work, you may need to replace the battery.
• Meter not turning on: If the MA445 is not turning on, make sure it is plugged in or has fresh batteries installed. You can also try pressing and holding the power button for a few seconds to see if that resets it. If the meter still does not turn on, you may need to contact Extech for a repair or replacement.
• Meter not detecting voltage: If the MA445 is not detecting voltage, make sure the probes are properly connected to the meter and the leads are not damaged. You can also try testing the meter on a known source of voltage to see if it is working properly. If the meter still does not detect voltage, you may need to contact Extech for a repair or replacement.

Here are some additional tips for troubleshooting common issues with the Extech MA445:

• Read the manual carefully before using the meter. This will help you understand how to use the meter properly and avoid making common mistakes.
• Keep the meter clean and free of dirt and debris. This will help to ensure accurate readings.
• Store the meter in a cool, dry place. This will help to extend the life of the meter.
• If you are still having problems with the meter, contact Extech customer support for assistance.

I hope this helps!

Extech MA445 Manual

Extech MA445 Manual

Safety Information

• Read and understand all safety information before using this meter.
• Do not use the meter if it is damaged or malfunctioning.
• Always wear safety glasses and gloves when using the meter.
• Do not touch live wires or terminals with the meter leads.
• Do not use the meter to measure voltages above its rated capacity.
• Do not use the meter in wet or dusty environments.
• Store the meter in a cool, dry place.

Before Use

• Remove the battery cover and insert two AAA batteries.
• Set the range selector to the appropriate setting for the measurement you are performing.
• Touch the test leads to the points you want to measure.
• Read the measurement on the display.

Troubleshooting

• If the meter displays an error message, check the connections and make sure that the meter is set to the correct range.
• If the meter still displays an error message, contact Extech Technical Support for assistance.

Maintenance

• Wipe the meter exterior with a damp cloth.
• Do not use harsh chemicals or solvents to clean the meter.
• Have the meter calibrated every two years or more often if used in harsh environments.

Warranty

• This meter is warranted to be free from defects in materials and workmanship for a period of two years from the date of purchase.
• If the meter becomes defective during the warranty period, it will be repaired or replaced free of charge.

Contact Information

• Extech Technical Support
• 1-800-523-5510
• [email protected]
• www.extech.com

Additional Information

• The MA445 is a 400A True RMS AC/DC clamp meter with 11 functions including DC Current, TRMS AC measurements, and Type K Thermocouple.
• The meter has a large, backlit display and a variety of features to make it easy to use, including a NCV (non-contact voltage) detector, MIN-MAX hold, and automatic power OFF.
• The MA445 is a durable and reliable meter that is perfect for a variety of electrical testing applications.