Just ordered Aneng MH13 Insulation Resistance Meter. Any comments on the spec

[shapirus]

I have no more resistance at hand now.

I have some.


1. 50G:




2. 100G:




Looks good to me.

It doesn't however see them (shows OL) at 1000V and below -- needs 2kV or more to measure either of them.


p.s. one of the best of my impulsive purchases so far. Very rarely needed, but it's an absolutely essential bit of kit, and at this price it's a no-brainer.

[Atlan]

Those resistors have a declared voltage resistance of 2000V

[shapirus]

Those resistors have a declared voltage resistance of 2000V

I think I heard some sound from the 50G resistor when I tested it at 2.5kV. Might've been a spark or arcing. No critical damage, though, it seems: still measures 50G. Not a big deal in any case: my only use for these resistors is to test this megohmmeter :).

[emg]

My MH!2 behave in similar way and the the output is negative.
below is the  image of out at 1000v mode.
another strange thing about MH12 is it's input resistance in meter mode.
the input resistance is about 10M but when the polarity of probes changes it  reduce to 5M.

[Bad_Driver]

I got my MH13 yesterday. It was a impulsive buy but I often do home installation works and it can help me.

Resistance measurement seems ok but I have only resistors up to 100 Mohms. The measurement voltages (up to 1000 volts, more I can‘t measure) are also in specs.

But AC measurment is wrong, see attached picture. Has anyone else this seen?
(mains is a little bit higher than usual since I use on my bench always an insulation transformer)

[shapirus]

But AC measurment is wrong, see attached picture. Has anyone else this seen?

Double check that you're feeding the voltage into the correct inputs. I don't recall which ones are correct for this measurement, so take it as a hint and check the manual.

p.s. I've never tried to measure AC voltage with mine, in fact, it has never occurred to me that it could be used as an AC voltmeter, because, well, what's the point, if I already have a proper DMM for that?
Will maybe try it some time later to see if it's any different from yours.

[Bad_Driver]

Inputs are correct, I tried it several times on some outlets in my house. Ground is connected to the housing of my insulation transformer to see if this has any impact.

Thanks for your fast reply. I will never use the MH13 for AC measurement but I‘m wondering if this error has any impact on the other measurment.

[dseyst]

You should check your MH13 manual to see how to use the different input jacks. To measure ac voltage you would use the two middle input jacks

[Bad_Driver]

You should check your MH13 manual to see how to use the different input jacks. To measure ac voltage you would use the two middle input jacks

Thanks for your advice! Not easy to spot in the „manual“ but now it is correct!

[shapirus]

...yeah that's exactly what I meant by asking whether the input jacks were correct

It's also important to pick the right ones to measure resistance. I believe it's the two outermost ones, at least, it works in my case. I don't think I have ever read the manual, though.