Measuring Ze

[gazdkw82]

Does the tester do a high current test via three wires then? That sounds a bit suspicious!

in all honesty I don't know. Iv had the tester 5 days and ze was the first test I wanted to try with it.

it wouldn't let me do the test with just earth croc and line probe (had the little X on the screen which means the tester isn't ready to do the test) it must be a 3 lead test

 

[davesparks]

in all honesty I don't know. Iv had the tester 5 days and ze was the first test I wanted to try with it.

it wouldn't let me do the test with just earth croc and line probe (had the little X on the screen which means the tester isn't ready to do the test) it must be a 3 lead test

Have you not read the manual?

What are those three leads doing?

 

[gazdkw82]

The manual is very basic. There is a diagram, that's about as much info as you get.

 

[Simonslimline]

The manual is very basic. There is a diagram, that's about as much info as you get.

View attachment 32230

Which make/model of MFT is it?

 

[gazdkw82]

Metrel MI3000 easiPLUS

 

[davesparks]

The manual is very basic. There is a diagram, that's about as much info as you get.

View attachment 32230

What is the setting before loop on the dial?

 

[gazdkw82]

Before the loop function is Line

 

[davesparks]

Before the loop function is Line

Which measures what exactly?

I have this sneaking suspicion that like a lot of testers that is the setting for a high current loop test.

 

[gazdkw82]

Like I said Iv had it 5 days so not really had chance to look in depth at it

 

[Andy78]

My tester is the same as this.

The Z loop setting on the dial is a high current test but has a sub setting of Z loop (RCD) which is a low current test.
The Z Line setting is also a high current test for Line-N and Line-Line impedance.

All three tests are described in the manual as three lead tests, and all three tests generate an automatic PFC value.

 

[TJ Anderson]

I have the new style megger MET also. Select Loop on dial. Then you can toggle with arrow button to left of screen between 2 Hi, 3Lo and 2lo. These are 2 lead High current, 3 lead low current and 2 lead low current.

 

[eddieboy]

I have the new style megger MET also. Select Loop on dial. Then you can toggle with arrow button to left of screen between 2 Hi, 3Lo and 2lo. These are 2 lead High current, 3 lead low current and 2 lead low current.

Yes it's the mft 1730

 

[davesparks]

My tester is the same as this.

The Z loop setting on the dial is a high current test but has a sub setting of Z loop (RCD) which is a low current test.
The Z Line setting is also a high current test for Line-N and Line-Line impedance.

All three tests are described in the manual as three lead tests, and all three tests generate an automatic PFC value.

On the kewtech it describes the hi current test as a L-N test and uses the 1 and 3 connections on the tester (also labelled L and N)
It seems some people don't understand and think it means it is only for testing L-N

 

[Andy78]

On the kewtech it describes the hi current test as a L-N test and uses the 1 and 3 connections on the tester (also labelled L and N)
It seems some people don't understand and think it means it is only for testing L-N

Ah I see. I've not used a Kewtech MFT. The Metrel definitely offers high current tests on both the line and loop settings.
The leads on the Metrel are a multi plug affair, so all three leads are connected to the tester at all times. Most testers I have used that offer 2 lead test options tend to have separate lead terminals on the tester.

 

[eddieboy]

Having looked at the manual from The Big Owls post, thanks, it appears that the test is being aborted due to "the danger of exceeding touch-voltage".
What does this mean and how can I reduce the touch voltage?