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Post by pb on Feb 27, 2021 17:55:15 GMT
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Post by tomplum on Feb 27, 2021 19:45:41 GMT
busy Day then PB and you made someone happy again, Had you not gone there, they would have to wash up in cold water, Worth every penny,  |
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Post by dickpuller on Feb 27, 2021 20:13:44 GMT
Anyone want to know how to test an immersion heater element using Ohms Law & a multimeter?? Learn the Dark Arts here!!
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Post by tomplum on Feb 27, 2021 20:43:33 GMT
yes please Dick ( Sherlock Holmes) Puller, do tell,  |
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Post by pb on Feb 27, 2021 21:16:35 GMT
busy Day then PB and you made someone happy again, Had you not gone there, they would have to wash up in cold water, Worth every penny,  Got to keep your well paying regulars happy |
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Post by dickpuller on Feb 27, 2021 21:35:35 GMT
OK to check the immersion heater is in good order👍
To check the immersion heater element use the two pins, don’t put your probes on the thermostat.
We’re checking the Ohms resistance, so set your multimeter to the Ohms(horse shoe) setting. Take the reading.
Now, we use Ohms Law;
3KW immersion heater, so that’s 3,000watts.
3000 divided by 240(volts AC) = 12.5.
12.5 is the Amps. The Amps is the current draw, this determines the cable & flex size etc.
So 240vac divided by 12.5amps = 19.2Ohms
So, for a healthy 3KW immersion element you should have a 19.2Ohms resistance👍👍
If you get a OL reading or anything else, it’s fucked!!
Simple eh??!! More Dark Arts to come, watch this space!!
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Post by endfeed on Feb 27, 2021 21:45:55 GMT
OK to check the immersion heater is in good order👍 To check the immersion heater element use the two pins, don’t put your probes on the thermostat. We’re checking the Ohms resistance, so set your multimeter to the Ohms(horse shoe) setting. Take the reading. Now, we use Ohms Law; 3KW immersion heater, so that’s 3,000watts. 3000 divided by 240(volts AC) = 12.5. 12.5 is the Ohms. So, for a healthy 3KW immersion element you should have a 12.5Ohms resistance👍👍 If you get a OL reading or anything else, it’s fucked!! Simple eh??!! More Dark Arts to come, watch this space!! excellent,cheers👍👍👍👍 |
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Post by pb on Feb 27, 2021 22:08:37 GMT
That's the posh way of testing Dick  my preferred method is continuity check the stat - it Beebs then immersion is fucked - it doesn't Beeb stat is fucked. |
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Post by tomplum on Feb 27, 2021 22:18:46 GMT
All good stuff on here, Thanks dick and PB, I use a practical approach which is, change the immersion, ok it takes longer but, you are certain you've nailed it, |
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Post by endfeed on Feb 27, 2021 23:46:32 GMT
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Post by pb on Feb 27, 2021 23:49:19 GMT
Them trousers and top don't suit you mate, you should wear black as it makes fat fuckers look thinner  |
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Post by dickpuller on Feb 28, 2021 6:54:59 GMT
That's the posh way of testing Dick my preferred method is continuity check the stat - it Beebs then immersion is fucked - it doesn't Beeb stat is fucked. Ah, but you could still get a Continuity Reading even if the element is fucked!! Think about it son👍👍👍 Many immersion heater thermostats can go faulty, particularly the modern ones with the High Temperature cut-out. They’re prone to be unreliable. How do you test the Thermostat? A simple continuity test will do. Remove it from its pocket & stick in a jug of hot water(boil the kettle for that you daft cunt, there’s no hot water in the tap!!). Check the HW temperature in the jug & ensure the thermostat is clicking On/Off at roughly that temperature. Again simple if you’re not hard of thinking. |
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Post by pb on Feb 28, 2021 9:32:18 GMT
OK to check the immersion heater is in good order👍 To check the immersion heater element use the two pins, don’t put your probes on the thermostat. We’re checking the Ohms resistance, so set your multimeter to the Ohms(horse shoe) setting. Take the reading. Now, we use Ohms Law; 3KW immersion heater, so that’s 3,000watts. 3000 divided by 240(volts AC) = 12.5. 12.5 is the Ohms. So, for a healthy 3KW immersion element you should have a 12.5Ohms resistance👍👍 If you get a OL reading or anything else, it’s fucked!! Simple eh??!! More Dark Arts to come, watch this space!! 12.5 would be your amp measurement Dickie as a healthy immersion you would have about 19 ohms. If your immersion is 3K. You do a resistance reading on the immersion and if it's healthy you would get a reading around 19 ohms. 240 divided by 19 = 12.6 .....that's your amp rating and we know it's 13 amp so all good . Personally I test I have 240v through the stat, if I have the immersion element has to be faulty. In most cases I do find a faulty immersion will normally keep tripping the box. |
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Post by pb on Feb 28, 2021 9:48:35 GMT
These modern stats with the reset are very hit and miss, not very well calibrated I find. If the reset needs pressing then the stat needs swapping.
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Post by dickpuller on Feb 28, 2021 11:41:53 GMT
OK to check the immersion heater is in good order👍 To check the immersion heater element use the two pins, don’t put your probes on the thermostat. We’re checking the Ohms resistance, so set your multimeter to the Ohms(horse shoe) setting. Take the reading. Now, we use Ohms Law; 3KW immersion heater, so that’s 3,000watts. 3000 divided by 240(volts AC) = 12.5. 12.5 is the Ohms. So, for a healthy 3KW immersion element you should have a 12.5Ohms resistance👍👍 If you get a OL reading or anything else, it’s fucked!! Simple eh??!! More Dark Arts to come, watch this space!! 12.5 would be your amp measurement Dickie as a healthy immersion you would have about 19 ohms. If your immersion is 3K. You do a resistance reading on the immersion and if it's healthy you would get a reading around 19 ohms. 240 divided by 19 = 12.6 .....that's your amp rating and we know it's 13 amp so all good . Personally I test I have 240v through the stat, if I have the immersion element has to be faulty. In most cases I do find a faulty immersion will normally keep tripping the box. Sorry, you’re absolutely correct PB I made a cunt of my Ohms Law & have the Amps instead of the Ohms. I’ll amend it for future reference, even a Plumbing Artisan & God, like my good self, can get it wrong!! That’s only happened once before!! |
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my preferred method is continuity check the stat - it Beebs then immersion is fucked - it doesn't Beeb stat is fucked. 
