R1+R2 of zero zilch nothing?......

[Baddegg]

Testing R1/R2 on 10mm/4mm T&E cable and the reading is 0.00? Never had this before, can I record 0 on the cert?

 

[Pete999]

Thanks strima, that calculation with Archie’s advice would account for the zero reading,
I am going to run some test tests tomorrow to put my mind at ease that the testers are working correctly, I’ll cut cable to exact lengths and then compare to osg/byb

Save cable buy a check box /card

 

[Toneyz]

What scale have you set on your MFT?

What scale is this Pete? my MFT only has the low ohms continuity you select as the same as the Kewtech KT63, not sure about the individual continuity/insulation resistance testers.

 

[Baddegg]

Good man ............... no arsey responses , and feedback too

Seriously, this is how the forum should be - competent sparks, helping sparks

And if you do cut lengths, don't do them too short ...........

I always appreciate the advice I’m given on here,You couldn’t buy the wealth of knowledge available, but.....I’m far from a spark!......yet
Thanks again

 

[Strima]

Thanks strima, that calculation with Archie’s advice would account for the zero reading,
I am going to run some test tests tomorrow to put my mind at ease that the testers are working correctly, I’ll cut cable to exact lengths and then compare to osg/byb

Don’t bother with exact lengths as resistance will change due to temperature variances.

Use the OSG to give you a ball park figure to work from.

 

[Baddegg]

Save cable buy a check box /card

I will be looking into that shortly Pete thanks

 

[Strima]

Show off

It’s not often I get to show off...

 

[Pete999]

What scale is this Pete? my MFT only has the low ohms continuity you select as the same as the Kewtech KT63, not sure about the individual continuity/insulation resistance testers.

I was thinking the OP may have had his MFT on the wrong setting, ie IR or something else continuity is OK

 

[Toneyz]

This can't be a new problem most testers are two digits. What do others put down when they do an R1+R2 to a double socket 2Mtrs down from the consumer unit? I usually get 0.00 ohms and record 0.01 ohms.

 

[westward10]

If it is 2m away it cannot possibly be 0.01 ohm.

 

[Toneyz]

If it is 2m away it cannot possibly be 0.01 ohm.

The point that I was trying to make is that you get a circuit very close to the distribution equipment value is too small.

 

[Silly Sausage]

If it is 2m away it cannot possibly be 0.01 ohm.

I was always taught not record a 'measurement' of zero, mark it up as 0.01.

 

[Baddegg]

I was always taught not record a 'measurement' of zero, mark it up as 0.01.

Yes that’s what I was told just never actually got zero before..

 

[Strima]

<0.01

 

[static zap]

I call this type of thing target chasing.
Low reading - is good .
May find self making better connection on reading (tighter grip)
than when calibrate leads !

 

[Ian1981]

So you have no LOW resistance scale on your MFT?

Really??
Continuity setting on your mft is your low ohm resistance setting for carrying the test