The voltage and current of AC circuits are constantly changing. When you measure them, you want the numbers that you can plug into Ohm's Law for power and other calculations. It involves a bit of calculus but to get a single number that would be an equivalent DC voltage or current, you take the average of the square at every point, divide it by the number of points, then take the square root. That is why it is called Root Mean Squared (RMS).If you take the simple average, you will get the wrong number. As long as the waveform doesn't change though, the average will be proportional to the RMS. Older meters take the simple average and are calibrated to give the right answer as long as the current is a simple sine wave. As long as the only loads are incandescent lights, simple motors and such, that is fine. Since that was all you would used to expect in a house, those meters were OK for interior electricians. Modern lights and electronics draw current that isn't a simple sine wave though, so everyone usually needs a true RMS meter.

IDEAL Electrical 61-744 Clamp Meter 600 Amp AC with NCV, Voltage Indicator, CATIII for 600V, Yellow

Q: When you clip the clamp round the wire it reads what amps are going through that cable?

YES and NO. Unless there is no current going through the wire then it won`t read anything. You must clamp only around a single wire not the whole cable. You only read the amps in each wire one at a time. Also the voltage effects the current so make sure you know what and how many wires may be carrying current. Such as 120 verses 240 volts etc.

Q: Does this meter have “vibration” when testing power on a circuit?

Dear Brent M., As per manufacturer, there is no vibration when testing voltage. Regards, Kate Mal

Q: Where is the item made, is it made in the in the U.S or China?

My tester is marked Made in Taiwan on the back. For quality, generally I find made-in-Taiwan to be better than made-in-China, but not as good as made-in-USA.

4.7/5

Product ID: 2466710

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Details

Brand
Ideal
Power Source
Battery
Style
w/o TRMS
Color
Yellow
Item Weight
1.1 Pounds

📏Compact design

🔋Auto shut-off feature

🔌600A AC current

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IDEAL Electrical 61-744 Clamp Meter 600 Amp AC with NCV, Voltage Indicator, CATIII for 600V, Yellow

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Description

🔧 Get the job done right with IDEAL precision!

TRUSTED QUALITY - Backed by over 100 years of industry expertise.
USER FRIENDLY DESIGN - Tapered jaws for easy access in tight spaces.
PRECISION MEASUREMENT - Accurate readings with +/-0.5% measurement accuracy.
VERSATILE FUNCTIONALITY - Measures both AC and DC voltage, plus resistance.
LONG LASTING PERFORMANCE - Includes low battery indicator and auto power-off.

The IDEAL Electrical 61-744 Clamp Meter is a versatile and compact tool designed for professionals, measuring up to 600A AC current with a user-friendly tapered jaw design. It features both AC/DC capabilities, an auto shut-off function to conserve battery life, and is backed by a century of trusted quality from IDEAL Industries.

Specifications

Brand	Ideal Industries
Power Source	Hand Powered
Style	w/o TRMS
Color	Yellow
Item Weight	1.05 Pounds
Item Dimensions LxWxH	1.5 x 2.6 x 8 inches
Manufacturer	Identity Music Group
Part Number	61-744
Item Weight	1.05 pounds
Product Dimensions	1.5 x 2.6 x 8 inches
Country of Origin	Taiwan
Item model number	61-744
Batteries	2 AAA batteries required. (included)
Is Discontinued By Manufacturer	No
Size	1.25"
Material	Plastic
Item Package Quantity	1
Number of Handles	1
Measurement Accuracy	+/-0.5%
Included Components	product, manual
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline
Warranty Description	2 years

Have a Question? See What Others Asked

what is RMS?

When you clip the clamp round the wire it reads what amps are going through that cable?

Does this meter have “vibration” when testing power on a circuit?

Where is the item made, is it made in the in the U.S or China?

Common Questions

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IDEAL Electrical 61-744 Clamp Meter 600 Amp AC with NCV, Voltage Indicator, CATIII for 600V, Yellow

Details

Description

Specifications

Have a Question? See What Others Asked

Common Questions