Megger 1721 fault help

[Highspark24/7]

I have a megger 1721 and occasionally when I’m doing testing a large amount of circuits the continuity locks on even with no leads attached any one had anything similar

 

[timhoward]

I'd get in touch with Megger, they've been helpful to me in the past.

 

[buzzlightyear]

Have reset the megger, it might work.

 

[Highspark24/7]

I'd get in touch with Megger, they've been helpful to me in the past.

I did give them a quick phone a few weeks ago and got some lady in reception and wasn't very helpful I will maybe try email or rant on twitter

 

[Highspark24/7]

Have reset the megger, it might work.

After removing battery and using my trusty old fluke 1652c to finish testing job the Megger seems to fix its self it’s just frustrating

 

[PEG]

hi.any bangs or knocks on the buttons? Worth checking that none of the function buttons are sticking,and they feel/sound like they are all actuating and releasing.
Had the odd sticky knob,in the past.........giggerty

 

[buzzlightyear]

Had the odd sticky knob,in the past

Ho matron.

 

[timhoward]

hi.any bangs or knocks on the buttons? Worth checking that none of the function buttons are sticking,and they feel/sound like they are all actuating and releasing.
Had the odd sticky knob,in the past.........giggerty

It's been a while since I used a Megger but I thought in in Continuity mode they continuously tested, i.e. you don't have to press a
test button? I might be out of date!
Is the symptom that the last result stays there?
It could of course still be a different function that is sticking / periodically causing the issue.

 

[timhoward]

Another thought - try leaving it on for a few minutes, don't null the leads, occasionally test something, and see if the "null" symbol appears when it decides to "stick". That would suggest one of the test buttons is causing it.

 

[Eddy Currents]

The continuity test on the Megger is automatic and starts when the leads are connected to a circuit
The test button is only used to null the leads

The only problems I have had with Megger is with continuity and nearly always was a battery problem
Circuits up to 2 Ω are tested at >200mA and I found that doing a lot of continuity testing zaps the batteries pretty quick to a point of unpredictable results
Try a brand new set of decent batteries and see if that fixes it

 

[Highspark24/7]

hi.any bangs or knocks on the buttons? Worth checking that none of the function buttons are sticking,and they feel/sound like they are all actuating and releasing.
Had the odd sticky knob,in the past.........giggerty

Na the unit is well looked after I a trusty fluke box and I'm very ---- about checking the unit I just seems to happen around 3/4 of doing a. Eicr or eic maby over heating but no symbol appears for that just locks 0.00 and constantly makes even with leads removed much prefer the fluke tbo a lot faster and quicker to use

 

[Highspark24/7]

The continuity test on the Megger is automatic and starts when the leads are connected to a circuit
The test button is only used to null the leads

The only problems I have had with Megger is with continuity and nearly always was a battery problem
Circuits up to 2 Ω are tested at >200mA and I found that doing a lot of continuity testing zaps the batteries pretty quick to a point of unpredictable results
Try a brand new set of decent batteries and see if that fixes it

I use procell battery's what are decent and have been using for years in all my other mft / testing meters

 

[Highspark24/7]

hi.any bangs or knocks on the buttons? Worth checking that none of the function buttons are sticking,and they feel/sound like they are all actuating and releasing.
Had the odd sticky knob,in the past.........giggerty

No unit has been very well looked after and sits in my old fluke box
Spoke to megger this week on phone and tech guy thinks it could be an internal relay sticking on