Extech Earth Ground Resistance Tester Kit


Extech Instruments

Price: $229.99

Product Details

  • 0 to 200VAC (40 to 500Hz) AC Dirt Voltage/Frequency
  • Unreduced with test leads, auxiliary earth bars, heavy duty case and six 1.5V AA batteries
  • Give out Earth Resistance in three ranges (20/200/2000Ohm)

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What is the output voltage of an insulation resistance tester which is required to test a 230 volt circuit?



Ordinance of thumb is twice operating. 500v usually closest on standard meter.

Be careful though, there are constant cases when you would keep the test voltage to once times. Also some components will not withstand meggar test and should be removed from tour for testing.


First, the achievement voltage used by the tester has nothing to do with the voltage carried by the circuite (230v) in this case.

Rather, the output voltage is based on the cleverness to measure electrical leakage through the insulation. All insulation leaks a little, but typically this is a very very small amount. So, to make tracks the leakage large enough to be measurable, either the test equipment must be very sensitive (and expensive) or the test voltage must dilate.

The only time the circuit voltage (230V) comes in to play is when you are selecting the insulation to begin with. You necessary to make sure that, given the insulation resistance of that wire, the resistance is high enough to be safe when the wire is carrying the full perimeter voltage. For example, an insulated wire rated to safely carry 230 volts will not liable to be safe to carry 10kV.

Go to www.fluke.com, to check out some test equipment. According to the data sheet tie-in below, this model of instrument uses a maximum 1000V test voltage.

http://us.fluke.com/usen/products/specifications.htm?cs_id=35391(FlukeProducts)&kind=INSUL(FlukeProducts)

Hope this helps,

-Guru


Whatever you fall short of. This one is selectable 500, 1000, 2500 and 5000 Volts. I think PAT testing is done at 250 or 500V


Dominate of thumb is twice operating. 500v usually closest on standard meter.

Be careful though, there are inexorable cases when you would keep the test voltage to once times. Also some components will not withstand meggar test and should be removed from edge for testing.

I want to buy the following items; GPS, digital camera, laser distance meter, resistance tester, binoculars?

I demand robust tools for a GSM company. Please advise on specs. Thanks.


There are definite things you have failed to tell us. What is your budget? As for the binoculars and digital camera what will they be used for? You do mention they are for a GSM convention. I assume then that they are general purpose.

Binoculars for general purpose without knowing more specifics of usage should be about 8 or 10 power and have unbiased lenses of about 30 to 40 mm. They should be water proof and fog proof just in case. Since they might be used by anyone, they should have an eye contrast of at least 17 mm so someone wearing glasses can easily use them.

Here is a link to a pair that meets these specs that are not overly valuable yet of excellent quality.

http://www.eagleoptics.com/index.asp?pid=3271


Digital camera

This is a really tough one to encourage on because without knowing what its purpose is I am shooting in the dark.

For the most flexibility without a great deal of cost, you might consider a Canon Powershot S5 IS. Not too expensive but has a very wide zoom lense and is very flexible. It is not a compact camera however but has plenty of flexibility for comprehensive purpose use.

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