Question 1

what is RMS?

Accepted Answer

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.

Question 2

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

Accepted Answer

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.

Question 3

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

Accepted Answer

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

Regards,
Kate Mal

Question 4

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

Accepted Answer

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.

ASIN	B001TAM3DC
Best Sellers Rank	#117,705 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #69 in Clamp Meters
Brand	Ideal Industries
Brand Name	Ideal Industries
Color	Yellow
Customer Reviews	4.7 out of 5 stars 318 Reviews
Global Trade Identification Number	00783250682386, 00783250682478
Included Components	product, manual
Item Dimensions	8 x 2.6 x 1.5 inches
Item Highlight	Amp clamp meter, non-contact voltage meter tester 70–600V AC, continuity test, auto/manual ranging, electric meter tester
Item Type Name	clamp meter
Item Weight	453.59 g
Item dimensions L x W x H	8 x 2.6 x 1.5 inches
Manufacturer	Identity Music Group
Measurement Type	Clamp Meter
Minimum Operating Voltage	70 volts_of_alternating_current
Model	61-744
Number of Items	1
Number of Packs	1
Part Number	61-744
Power Source	Battery Powered
Specification Met	Implied Safety/Industry Standards
Style	w/ TRMS
Style Name	w/ TRMS
UPC	783250682386 783250682478
Unit Count	1 Count
Warranty Description	2 year manufacturer

Ideal Electrical Clamp-Pro Clamp Meter, 600A AC Measurement, Multimeters

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