I got hold of a second hand one of these:
- posted
4 years ago
I got hold of a second hand one of these:
How are you measuring the reference currents of 0.62A and 8.5A?
Using the specification of the HEME 1010
You are on the 400Amp range with a resolution of 0.1A The accuracy is +/-5 digits (+/- 0.5 Amps) plus 1.3% of reading (0.1A) so the reading is 6A +/-0.6A
If you are using a multimeter as the comparison it may be equally inaccurate, especially if the internal battery is failing. Often a failing battery in a multimeter gives high readings.
The 0.62A was with a decent multimeter connected in the circuit.
The 8.5A was measured both with one of those energy efficiency meters on my house's meter tail, and by knowing what devices were running.
It's a HEME 100, not 1010.
There is no range selectable, it's automatic?
That's a hell of an error margin, but still way less than what I'm getting.
Also, taking the same reading in the same circuit repeatedly is giving widely varying readings, between 50% too low and 10% too low. I've thrown it in the bin.
I know the multimeter is accurate, I've tested it on all sorts of things.
The only way you will know that your multimeter is accurate is by having it calibrated against a known standard, ideally specified to 10x better than your meter.
At 0.65A a high end Fluke multimeter @ £200+ will give 0.65A +/- 0.01A on a typical £50 multimeter £50 it will give 0.65A +/-0.09A
Without a specification for what you have purchased, you may have meter capable of measuring fairly accurately currents in the range 100A to
1000A but not capable of 0 to 10A measurements with any degree of accuracyTypically you may be trying to measure and compare a 0.65A current with measuring equipment with a total uncertainty of measurement of around 0.6A
So your comparison standard is something British Gas used to give away for free, possible so inaccurate that it hasn't got a published specification for its current measuring capability.
Or by using it to measure a known current on a bulb I know draws a certain current.
"and by knowing what devices were running"
If you are measuring volts then ac is best on a calibrated scope of course, but I've seen some very strange results from clamp meters in the past, and after all there are a lot of variables going on all at once. Brian
Plonk
Awww was my reply too difficult for you?
Fuck off Hucker.
I don't see any useful information from you.... do you even know what a clamp meter is?
I used them 24 years ago with no problems. Now, just f*ck off, man with a degree who can't even use a clamp meter or get a job. Just, f*ck off Hucker.
probably a clap meter......
He does go on about his three in a bed escapades.
I can use one that works correctly.
bona
"If you get the right reading every time it must be a Fluke."
I have a Clamp Leaker 140. Are they any good?
I didn't know you could measure volts with the clamp part of a clamp meter.
If it is of the newer (as in less than 25 years old) hall effect sensor devices then it will be more susceptable to stray magnetic fields. There should be a calibrate/zero button on it somewhere which you should use just before you clamp on to cancel all these effects out before measurement.
You can't.
If you clamp both active and neutral they will cancel out and you will get no reading.
I have a Clamp Leaker 140.
The EMC BS EN 61326 standard was first released about 2006 so less than
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