Home |
Search |
Today's Posts |
|
UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
Reply |
|
LinkBack | Thread Tools | Display Modes |
#1
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
I got hold of a second hand one of these:
https://www.torontosurplus.com/rs-co...lampmeter.html A HEME 100 clamp meter. I can't find specs for it online, only a HEME 1010. I've tried reading a few currents with it (using a brand new battery in it), and it seems to underread a fair bit on DC (0.56A instead of 0.62A) and AC (7.5A instead of 8.5A). It's also susceptible to wires near it - for example if you put the live inside the clamp but the neutral is an inch or so from the outside of the clamp, it reads a bit of that too and gives a higher reading. Are these things supposed to be accurate? Can I adjust it? |
#3
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
On 11/05/2019 14:33, Commander Kinsey wrote:
I got hold of a second hand one of these: https://www.torontosurplus.com/rs-co...lampmeter.html A HEME 100 clamp meter. I can't find specs for it online, only a HEME 1010. I've tried reading a few currents with it (using a brand new battery in it), and it seems to underread a fair bit on DC (0.56A instead of 0.62A) and AC (7.5A instead of 8.5A).* It's also susceptible to wires near it - for example if you put the live inside the clamp but the neutral is an inch or so from the outside of the clamp, it reads a bit of that too and gives a higher reading.* Are these things supposed to be accurate?* Can I adjust it? 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. -- mailto : news {at} admac {dot} myzen {dot} co {dot} uk |
#4
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Troll-feeding Senile IDIOT Alert!
On Sat, 11 May 2019 19:00:52 +0100, anal_m, the notorious troll-feeding
senile idiot, blathered: How are you measuring the reference currents of 0.62A and 8.5A? More relevant question, how does one measure the idiocy of a retarded troll and his corresponding troll-feeding senile idiot, anal_m? |
#5
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
On Sat, 11 May 2019 19:00:52 +0100, alan_m wrote:
On 11/05/2019 14:33, Commander Kinsey wrote: I got hold of a second hand one of these: https://www.torontosurplus.com/rs-co...lampmeter.html A HEME 100 clamp meter. I can't find specs for it online, only a HEME 1010. I've tried reading a few currents with it (using a brand new battery in it), and it seems to underread a fair bit on DC (0.56A instead of 0.62A) and AC (7.5A instead of 8.5A). It's also susceptible to wires near it - for example if you put the live inside the clamp but the neutral is an inch or so from the outside of the clamp, it reads a bit of that too and gives a higher reading. Are these things supposed to be accurate? Can I adjust it? How are you measuring the reference currents of 0.62A and 8.5A? 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. Using the specification of the HEME 1010 It's a HEME 100, not 1010. You are on the 400Amp range with a resolution of 0.1A There is no range selectable, it's automatic? The accuracy is +/-5 digits (+/- 0.5 Amps) plus 1.3% of reading (0.1A) so the reading is 6A +/-0.6A 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. 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. I know the multimeter is accurate, I've tested it on all sorts of things. |
#6
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
On 11/05/2019 19:54, Commander Kinsey wrote:
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 accuracy Typically 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 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. 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. -- mailto : news {at} admac {dot} myzen {dot} co {dot} uk |
#7
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Troll-feeding Senile IDIOT Alert!
On Sat, 11 May 2019 22:38:42 +0100, anal_m, the notorious troll-feeding
senile idiot, blathered: 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. What you don't realize, anal_m, you troll-feeding senile arsehole, is that he really keeps testing his silly baits on you troll-feeding senile asshole ....and very successfully so far! |
#8
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
On Sat, 11 May 2019 22:38:42 +0100, alan_m wrote:
On 11/05/2019 19:54, Commander Kinsey wrote: 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. Or by using it to measure a known current on a bulb I know draws a certain current. 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 accuracy Typically 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 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. 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. "and by knowing what devices were running" |
#9
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
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 -- ----- -- This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please Note this Signature is meaningless.! "alan_m" wrote in message ... On 11/05/2019 19:54, Commander Kinsey wrote: 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 accuracy Typically 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 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. 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. -- mailto : news {at} admac {dot} myzen {dot} co {dot} uk |
#10
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
On 11/05/2019 23:12, Commander Kinsey wrote:
On Sat, 11 May 2019 22:38:42 +0100, alan_m wrote: 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. Or by using it to measure a known current on a bulb I know draws a certain current. 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. "and by knowing what devices were running" Plonk -- mailto : news {at} admac {dot} myzen {dot} co {dot} uk |
#11
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
The damn thing was inaccurate on plain resistive loads on DC and AC. It's been binned.
On Sun, 12 May 2019 07:49:15 +0100, Brian Gaff wrote: 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 |
#12
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
On Sun, 12 May 2019 08:10:43 +0100, alan_m wrote:
On 11/05/2019 23:12, Commander Kinsey wrote: On Sat, 11 May 2019 22:38:42 +0100, alan_m wrote: 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. Or by using it to measure a known current on a bulb I know draws a certain current. 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. "and by knowing what devices were running" Plonk Awww was my reply too difficult for you? |
#13
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
Commander Kinsey wrote:
On Sun, 12 May 2019 08:10:43 +0100, alan_m wrote: On 11/05/2019 23:12, Commander Kinsey wrote: On Sat, 11 May 2019 22:38:42 +0100, alan_m wrote: 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. Or by using it to measure a known current on a bulb I know draws a certain current. 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. "and by knowing what devices were running" Plonk Awww was my reply too difficult for you? **** off Hucker. |
#14
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
On Sun, 12 May 2019 17:05:57 +0100, Mr Pounder Esquire wrote:
Commander Kinsey wrote: On Sun, 12 May 2019 08:10:43 +0100, alan_m wrote: On 11/05/2019 23:12, Commander Kinsey wrote: On Sat, 11 May 2019 22:38:42 +0100, alan_m wrote: 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. Or by using it to measure a known current on a bulb I know draws a certain current. 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. "and by knowing what devices were running" Plonk Awww was my reply too difficult for you? **** off Hucker. I don't see any useful information from you.... do you even know what a clamp meter is? |
#15
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
Commander Kinsey wrote:
On Sun, 12 May 2019 17:05:57 +0100, Mr Pounder Esquire wrote: Commander Kinsey wrote: On Sun, 12 May 2019 08:10:43 +0100, alan_m wrote: On 11/05/2019 23:12, Commander Kinsey wrote: On Sat, 11 May 2019 22:38:42 +0100, alan_m wrote: 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. Or by using it to measure a known current on a bulb I know draws a certain current. 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. "and by knowing what devices were running" Plonk Awww was my reply too difficult for you? **** 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 **** off, man with a degree who can't even use a clamp meter or get a job. Just, **** off Hucker. |
#16
Posted to uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
"Commander Kinsey" wrote in message news On Sun, 12 May 2019 17:05:57 +0100, Mr Pounder Esquire wrote: Commander Kinsey wrote: On Sun, 12 May 2019 08:10:43 +0100, alan_m wrote: On 11/05/2019 23:12, Commander Kinsey wrote: On Sat, 11 May 2019 22:38:42 +0100, alan_m wrote: 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. Or by using it to measure a known current on a bulb I know draws a certain current. 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. "and by knowing what devices were running" Plonk Awww was my reply too difficult for you? **** off Hucker. I don't see any useful information from you.... do you even know what a clamp meter is? probably a clap meter...... |
#17
Posted to uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
On Sun, 12 May 2019 19:39:50 +0100, Jim wrote:
"Commander Kinsey" wrote in message news On Sun, 12 May 2019 17:05:57 +0100, Mr Pounder Esquire wrote: Commander Kinsey wrote: On Sun, 12 May 2019 08:10:43 +0100, alan_m wrote: On 11/05/2019 23:12, Commander Kinsey wrote: On Sat, 11 May 2019 22:38:42 +0100, alan_m wrote: 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. Or by using it to measure a known current on a bulb I know draws a certain current. 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. "and by knowing what devices were running" Plonk Awww was my reply too difficult for you? **** off Hucker. I don't see any useful information from you.... do you even know what a clamp meter is? probably a clap meter...... He does go on about his three in a bed escapades. |
#18
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
On Sun, 12 May 2019 18:12:27 +0100, Mr Pounder Esquire wrote:
Commander Kinsey wrote: On Sun, 12 May 2019 17:05:57 +0100, Mr Pounder Esquire wrote: Commander Kinsey wrote: On Sun, 12 May 2019 08:10:43 +0100, alan_m wrote: On 11/05/2019 23:12, Commander Kinsey wrote: On Sat, 11 May 2019 22:38:42 +0100, alan_m wrote: 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. Or by using it to measure a known current on a bulb I know draws a certain current. 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. "and by knowing what devices were running" Plonk Awww was my reply too difficult for you? **** 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 **** off, man with a degree who can't even use a clamp meter or get a job. Just, **** off Hucker. I can use one that works correctly. |
#19
Posted to uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
"Commander Kinsey" wrote in message news On Sun, 12 May 2019 19:39:50 +0100, Jim wrote: "Commander Kinsey" wrote in message news On Sun, 12 May 2019 17:05:57 +0100, Mr Pounder Esquire wrote: Commander Kinsey wrote: On Sun, 12 May 2019 08:10:43 +0100, alan_m wrote: On 11/05/2019 23:12, Commander Kinsey wrote: On Sat, 11 May 2019 22:38:42 +0100, alan_m wrote: 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. Or by using it to measure a known current on a bulb I know draws a certain current. 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. "and by knowing what devices were running" Plonk Awww was my reply too difficult for you? **** off Hucker. I don't see any useful information from you.... do you even know what a clamp meter is? probably a clap meter...... He does go on about his three in a bed escapades. bona |
#20
Posted to uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
On Sun, 12 May 2019 20:17:58 +0100, Jim wrote:
"Commander Kinsey" wrote in message news On Sun, 12 May 2019 19:39:50 +0100, Jim wrote: "Commander Kinsey" wrote in message news On Sun, 12 May 2019 17:05:57 +0100, Mr Pounder Esquire wrote: Commander Kinsey wrote: On Sun, 12 May 2019 08:10:43 +0100, alan_m wrote: On 11/05/2019 23:12, Commander Kinsey wrote: On Sat, 11 May 2019 22:38:42 +0100, alan_m wrote: 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. Or by using it to measure a known current on a bulb I know draws a certain current. 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. "and by knowing what devices were running" Plonk Awww was my reply too difficult for you? **** off Hucker. I don't see any useful information from you.... do you even know what a clamp meter is? probably a clap meter...... He does go on about his three in a bed escapades. bona It is usually wise to have a boner when doing that, yes. |
#21
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
"If you get the right reading every time it must be a Fluke."
I have a Clamp Leaker 140. Are they any good? |
#22
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
On 12/05/2019 07:49, Brian Gaff wrote:
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 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. |
#23
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
On Tue, 14 May 2019 10:36:59 +0100, Andy Bennet
wrote: On 12/05/2019 07:49, Brian Gaff wrote: 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 I didn't know you could measure volts with the clamp part of a clamp meter. You can't. 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. If you clamp both active and neutral they will cancel out and you will get no reading. I have a Clamp Leaker 140. http://www.multimic.com/assets/e/catalog/e_ca_m140.pdf http://www.multimic.com/assets/e/ins.../e-ma-m140.pdf Any idea how old? |
#24
Posted to alt.electronics,at.home.repair,uk.d-i-y
|
|||
|
|||
Inaccurate clamp meter?
On 14/05/2019 13:31, Lucifer wrote:
On Tue, 14 May 2019 10:36:59 +0100, Andy Bennet wrote: On 12/05/2019 07:49, Brian Gaff wrote: 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 I didn't know you could measure volts with the clamp part of a clamp meter. You can't. 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. If you clamp both active and neutral they will cancel out and you will get no reading. I have a Clamp Leaker 140. http://www.multimic.com/assets/e/catalog/e_ca_m140.pdf http://www.multimic.com/assets/e/ins.../e-ma-m140.pdf Any idea how old? The EMC BS EN 61326 standard was first released about 2006 so less than 13 years old. |
Reply |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
Fox News host apologizes for inaccurate report stating food stampfraud was at 'all-time high' | Metalworking | |||
Misleading (Inaccurate?) Energy Report From My Utility | Home Repair | |||
Inaccurate reading on spa topside control | Home Repair | |||
Supply 5,8,10 Pair Clamp Module,Orbit Clamp Module,LSA Profile-Anschlussleiste | Woodworking |