Test leads giving 0 ohms

[vwes59]

Hi,
My Kewtech KT63DL has just come back from its annual calibration without any issues, but Ive just taken it to site and attempted to do the usual nulling of the leads before doing a continuity test and they keep coming back as 0 ohms which they didnt used to do. Normally i had to null them. I did the continuity test and checked the result and the results were fine.

I might be worrying over nothing but it does seem highly unusual

Anyone else seen this ?

 

[vwes59]

Hi,
My Kewtech KT63DL has just come back from its annual calibration without any issues, but Ive just taken it to site and attempted to do the usual nulling of the leads before doing a continuity test and they keep coming back as 0 ohms which they didnt used to do. Normally i had to null them. I did the continuity test and checked the result and the results were fine.

I might be worrying over nothing but it does seem highly unusual

Anyone else seen this ?

Looks like the KT63DL has an auto null facility for continuity. Never noticed this before, perhaps something was done at Kewtech during its calibration. Oh well good to know i suppose

 

[buzzlightyear]

Read the manual. Most testers do nul to 0.

 

[timhoward]

My Kewtech leads usually null at about 0.07 ohms. Have you got new leads?
My KT63 certainly doesn't have auto-null and the manual for the kt63dl doesn't mention it and it says the null setting is lost when power is turned off.
Or maybe it got a firmware update?

It's situations like this where a check box or cal-card is handy. I'd want some evidence it is producing sensible numbers if that started randomly happening.