is my megger faulty?

[snoopydo]

hi, i have a megger mft1552, purchased in 2008, has not been calibrated for a few years, its never been used for work, just a few home/family jobs and practice testing when i was going through college learning. Tried to use it for the first time in well over a year the other day and it seems to have a problem.

On IR testing even without the leads connected it will only go up to 6.5-7Mohms on all 3 voltages. Ive tested the other functions on my kewtech F1000 checkbox and the measurments are good but on IR it will only read upto the 6.5-7 . The megger has new batts at 12.2v.

Has anybody seen this problem before? or have an idea what it could be? i am hoping it could just need tweaking and calibration, can it be adjusted when calibrated?. I know megger will want ££££'s even if its a simple fix, it would be a shame to not try and get it working as its probably only been used 15-20 times and looks brand new. Dont want to send it to be calibrated if theres def a fault that i cant afford to repair.

any advise would be helpful and very appreciated.

 

[Former Sponsor TM]

Hi snoopydo, if you can fund the postage and send it to us in Leeds (or drop it in if you're local), I can run a calibration check against the manufacturer's specs to see if any problems arise.

If the tester needs adjustment I can quote you for an adjustment and repair charge, but if you decide not to go ahead I will simply send the tester back to you without charge.

PM me for further information

 

[snoopydo]

thanks Test Meter, ill send you a PM.

 

[gazj82]

Has it been stored in a damp shed, my PAT tester did this after being stored for a long period, it disappeared within a few hours, probably slightly damp inside. Although it probably still needs calibrating. Needless to say I keep it indoors now.

 

[snoopydo]

no, its been inside a bedroom cupboard, dry as a boon.

 

[GLENNSPARK]

Hi snoopydo, if you can fund the postage and send it to us in Leeds (or drop it in if you're local), I can run a calibration check against the manufacturer's specs to see if any problems arise.

If the tester needs adjustment I can quote you for an adjustment and repair charge, but if you decide not to go ahead I will simply send the tester back to you without charge.

PM me for further information

opp amp perhaps?

i know that Steve at metrels replaced this on one of my MFTs..together with the bridge rectifier...and a load of other components....lol...

runnin a treat now though...