Why do Megger MT1700 Teaters Measure IR to 999 Megohms

[JaegerZero1984]

I have got a new Mt1720 Megger tester and it measures to 999 Megohms. the old one my boss loaned out to me and my assesment testers only go up to 299 Megohms. Why do they go so high now?

 

[telectrix]

because they can.
i have a megger IR/continuity tester ( forgot the model no.) that reads on IR in Gig ohms.

 

[JaegerZero1984]

so its not to comply with new regs or anything its just a manufacture quirk.

 

[DPG]

so its not to comply with new regs or anything its just a manufacture quirk.

Just different manufacturers with different ideas. And don't forget, the accuracy at then top end of the scale may not be as good as down at the 'reasonable end'. They could design the machine to read up to 999G if they wanted, but obviously as the range gets higher, it is more and more difficult to design the electronics to do it, and there's no real point in day to day electrical testing.

 

[Moley]

We use Chauvin Arnoux 5kv units that measures to 10T

 

[DPG]

We use Chauvin Arnoux 5kv units that measures to 10T

Tommy topper

 

[telectrix]

10 tons.

 

[Adam W]

This seems to have turned into a willy waving contest.
I used to use a Kewtech KT65 which tests at 250v up to 199MΩ; and at 500v up to 900MΩ, not that I consider it anything to shout about

 

[ruston]

This seems to have turned into a willy waving contest.
I used to use a Kewtech KT65 which tests at 250v up to 199MΩ; and at 500v up to 900MΩ, not that I consider it anything to shout about

Unless you are hanging on to the probes at the time.

 

[ipf]

Unless you are hanging on to the probes at the time.

Give him an old wind up...…..he's good at that!

 

[Deleted account]

This seems to have turned into a willy waving contest.
I used to use a Kewtech KT65 which tests at 250v up to 199MΩ; and at 500v up to 900MΩ, not that I consider it anything to shout about

The kt64 goes up to 1999 mega ohms at 500v test. But I'm not bragging.

I normally put greater than 199 meg on cert if it goes over that to save on the extra ink used to write the other 9

 

[elsparko]

Unless you are hanging on to the probes at the time.

one of my college tutours had a deep yorkshire accent, he also wore a bumbag, had a ponytail, had a constant look like he was surprised

so obviously in the workshop when words like "megger" "copper" "pliers" "cutters" i would mimic him, got chased around with the tester for a bit but he couldnt catch me , so he got himself a bit of pvc conduit and started hitting me with it.

---- got serious, i told him he had a few seconds to rethink what he was doing otherwise he would be seeing the inside of an ambulance very shortly.

 

[Adam W]

The kt64 goes up to 1999 mega ohms at 500v test. But I'm not bragging.

I normally put greater than 199 meg on cert if it goes over that to save on the extra ink used to write the other 9

199MΩ is plenty; >199MΩ is perfectly adequate. Anything more is just showing off.

 

[ipf]

199MΩ is plenty; >199MΩ is perfectly adequate. Anything more is just showing off.

>1000...…

 

[Moley]

This seems to have turned into a willy waving contest.

No one would notice if I waved that about

 

[Moley]

199MΩ is plenty; >199MΩ is perfectly adequate. Anything more is just showing off.

Depends on what you are testing. We are normally testing HV switchgear.

 

[ipf]

No one would notice if I waved that about

Ewe, maybe!

 

[buzzlightyear]

the old Megger used to say 299meg on 230v and 500v ,so megger decided it to put 999 meg so that you would not get confused on testing to infinity and beyond .