Megger 1552 faults

[adamh]

just re read is this using the plug top lead or the individual ones?

 

[thiza1455]

Thanks guys this is frustrating still trying to work out who can repair @ reasonable cost

 

[Strima]

If it's less than three years old it may still be under warranty.

 

[MarkieSparkie]

This is the sort of behavior on a Megger 15xx series MFT that is usually the result of a selection switch or input terminal fault, most often it starts intermittent and gets worse over time.
Before condemning your MFT to spares or repair:
1) Check the lead sets for continuity flex all points of stress whilst checking, the BS 1363 lead set is particularly vulnerable at the multi-way plug/socket interconnection.
2) Clean the 4mm sockets with isopropyl alcohol or switch cleaner on a cotton bud, you will be amazed at the crap and dirt that ends up on the cotton bud.

 

[Kiers1970]

the selector switch on mine is a pain.I suspect there is rubbish accumulated in it. Anyone ever attempted to dismantle theirs to sort this out.OI reckon there are some screws hidden under the cover somewhere. It's out of warranty before anyone points out the obvious! (rubbish design fault though. Theses things should give years of service without problems, considering the cost of them)

 

[thiza1455]

just re read is this using the plug top lead or the individual ones?

Its using individual leads

 

[morph]

your meter is knackered , i had one a 1502 lasted 7 years then the continuity went funny on and off then it stopped reading voltage and thus could not do loop or pfc etc, it will cost you £400 to sort out so you might as well buy a new one ....

 

[telectrix]

the selector switch on mine is a pain.I suspect there is rubbish accumulated in it. Anyone ever attempted to dismantle theirs to sort this out.OI reckon there are some screws hidden under the cover somewhere. It's out of warranty before anyone points out the obvious! (rubbish design fault though. Theses things should give years of service without problems, considering the cost of them)

you can open them, but it's a pain. remove all screws, then you can carefully prise the case apart. it interlocks with the front panel and is a right pain to refit. there's a company in stafford. think they're called calibration services ( summat like, anyway), that will quote you a repair cost if you send/take it to them (a lot less than megger charge).

 

[edexlab]

the selector switch on mine is a pain.I suspect there is rubbish accumulated in it. Anyone ever attempted to dismantle theirs to sort this out.OI reckon there are some screws hidden under the cover somewhere. It's out of warranty before anyone points out the obvious! (rubbish design fault though. Theses things should give years of service without problems, considering the cost of them)

Does it show nothing or a different function to the one your selecting?
Mine does this and the only thing you can do is press the backlight button which also lights up the selections and then you have to tweak it around a bit
I'm debating whether to repair or just go and buy a fluke as I'm not impressed with the new meggers there's lots of issues with them a mate asked me to check a continuity reading he had on his brand new megger 0.9 ohms r1 r2 on one metre of 6.0mm it was actually 0.04 by my tester (recently calibrated)

 

[bigbolt]

re megger 1552 tester
i had loads of problems with one of mine bought new leads etc cleaned terminals with cleaner still no better so i decided to take it apart myself to have alook this is very easy just take your time
i eventually traced fault to the back of the centre post the earth one this post can turn 360 on itself and after time the soldered connection had broken off but because it is doubled up with another wire and is under heat shrjnk it can be intermittant and a real pain
resoldered and put a blob of glue at back of post to stop it turning good as new
i hope this helps someone

 

[R4BOE]

megger is s*** we have had several instruments including the MFT1553 which is only a backup instrument so no sore use its like new its been back to megger several times and still not sorted out, and there back up after sales care is s***, ther rep is hopeless

 

[MarkieSparkie]

re megger 1552 tester
... so i decided to take it apart myself to have alook this is very easy just take your time ...

Please provide us with the step by step procedure you used Bigbolt, as every time I've tried to take a 15xx series MFT apart it's proved far from easy.

 

[bigbolt]

Please provide us the step by step procedure you used Bigbolt, as every time I've tried to take a 15xx series MFT apart it's proved far from easy.

To dissmantle my mft 1552 unit i removed battery cover and battery unit remove spare fuse as this will drop out anyway.Next carefully prise off the front label which surrounds all the function dials start this off with a stanley knife blade or similar it comes off easily once you have got a corner up it is held down by some blobs of contact adhesive so will go straight back on after.You will now see 4 screws remove these with a no 1 pozi the front panel will come forward loose and you simply pull off carefully the ribbon cable and then this is off.There is a rubber seal strip around a recess behind the front panel this will fall out so remove and refit later.Next there are 4 screws holding the main body together remove these prise the body apart.There are 2 ribbon cables to unplug and the battery pack input plug which goes onto the circuit board this is very flimsy and make a note of its orientation.You can now get at everything as i said my problem was with the centre pin input plug which i noticed was turning 360 and so snapped its connection.You will have to cut some small ties around the cables and remove the heat shrink around the solder.I realised the fault by checking the continuity between the input plug and its connection post on the circuit board.Have fun!! i hope this helps mine is fine now and i saved a lot of money so is perfectly doable

 

[Kiers1970]

right, I'm going to try this mate, wish me luck, I tried to open an Ipod, whoops cracked the screen!