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Post by endfeed on May 28, 2018 18:11:52 GMT
If you suspect a failing room stat what's your method of fault finding? I have to pass to sparks for this type of problem😟 I have a auto ranger multi meter and want to gem up on electric side....
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Post by battle1066 on May 28, 2018 19:02:15 GMT
I find the electronic digital ones typically used today either work or don't and are easy to check with a multimeter on the ohms circuit (checking for continuity at the chosen temperature) on the voltage free contacts eg it's a simple switch on at the desired temperature.
However,the earlier analogue ones used a neutral and a resistor as a heater to assist in the accuracy of the switching point and could be over or under range by three to four degrees, again a simple switch but best checked with a thermometer because of their poor accuracy - so you need to check both the switching circuit and the resistor heating.
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Post by Deleted on May 28, 2018 19:47:32 GMT
I find the electronic digital ones typically used today either work or don't and are easy to check with a multimeter on the ohms circuit (checking for continuity at the chosen temperature) on the voltage free contacts eg it's a simple switch on at the desired temperature. However,the earlier analogue ones used a neutral and a resistor as a heater to assist in the accuracy of the switching point and could be over or under range by three to four degrees, again a simple switch but best checked with a thermometer because of their poor accuracy - so you need to check both the switching circuit and the resistor heating. I have been to analogue ones without a neutral just live in and switch out and they are miles out because it's not using the resister. I find the problems with the wireless types is cross banding and usually electric garage doors or a neighbour has a wireless stat which upsets the frequency and you have to reband them..  |
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Post by Deleted on May 28, 2018 19:49:56 GMT
If you suspect a failing room stat what's your method of fault finding? I have to pass to sparks for this type of problem😟 I have a auto ranger multi meter and want to gem up on electric side.... Turn the power off endfeed and check for continuity across live and switch live, make sure you whack the stat up fully to guarantee its calling mate. |
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Post by Deleted on May 28, 2018 20:05:17 GMT
Always be careful with a multi meter endfeed when testing for voltage in a wiring centre because a meter will tell you the voltage difference between what you are testing.
Example 1 : orange wire 0 volts and brown wire 230 volts and your meter will tell you there is a 230 volt difference.
Example 2 : orange wire 230 volts and brown wire 230 volts and your meter will tell you there is a 0 volt difference.
Does that make sense for you ? Be careful when testing mate we don't want a over done endfeed.
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Post by endfeed on May 28, 2018 20:28:30 GMT
Niceone p.b👍👍👍..will watch out for that...don't want to lose my rag with my multi meter and smash it to bits like tom did 😂😂😂😂😂
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Post by glowbug on May 28, 2018 20:33:39 GMT
Always be careful with a multi meter endfeed when testing for voltage in a wiring centre because a meter will tell you the voltage difference between what you are testing. Example 1 : orange wire 0 volts and brown wire 230 volts and your meter will tell you there is a 230 volt difference. Example 2 : orange wire 230 volts and brown wire 230 volts and your meter will tell you there is a 0 volt difference. Does that make sense for you ? Be careful when testing mate we don't want a over done endfeed. Very good point that with multi meter on👍I always measure to earth with a multi meter , and if you unsure back up with a neon tester pen, or if you are flush for a few quid use duspol testers. I do prefer a multi meter though personally. |
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Post by tomplum on May 28, 2018 20:36:54 GMT
ha ha, sometimes a dog tag can interfere with the frequenzy, try changing the codes in the sender and reciever, thats them little tabs inside that go either up or down, as long as the both are the same, it will work, qwerty
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Post by Deleted on May 28, 2018 20:37:23 GMT
Always be careful with a multi meter endfeed when testing for voltage in a wiring centre because a meter will tell you the voltage difference between what you are testing. Example 1 : orange wire 0 volts and brown wire 230 volts and your meter will tell you there is a 230 volt difference. Example 2 : orange wire 230 volts and brown wire 230 volts and your meter will tell you there is a 0 volt difference. Does that make sense for you ? Be careful when testing mate we don't want a over done endfeed. Very good point that with multi meter on👍I always measure to earth with a multi meter , and if you unsure back up with a neon tester pen, or if you are flush for a few quid use duspol testers. I do prefer a multi meter though personally. Multi meters are great GB as long as we use them sensibly  Tom calibrates his with a hammer  |
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Post by tomplum on May 28, 2018 20:39:41 GMT
it worked PB, it never gave me a shock after I twated it into 15 quarters,, |
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Post by Deleted on May 28, 2018 20:46:45 GMT
it worked PB, it never gave me a shock after I twated it into 15 quarters,, laughing-dog-smiley-emoticon |
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Post by dickpuller on May 28, 2018 21:24:32 GMT
Always be careful with a multi meter endfeed when testing for voltage in a wiring centre because a meter will tell you the voltage difference between what you are testing. Example 1 : orange wire 0 volts and brown wire 230 volts and your meter will tell you there is a 230 volt difference. Example 2 : orange wire 230 volts and brown wire 230 volts and your meter will tell you there is a 0 volt difference. Does that make sense for you ? Be careful when testing mate we don't want a over done endfeed. Very good point that with multi meter on👍I always measure to earth with a multi meter , and if you unsure back up with a neon tester pen, or if you are flush for a few quid use duspol testers. I do prefer a multi meter though personally. FFS! Dont use a neon tester for anything, leathal if they get wet!! Get yourself one of these or use a multimeter. Fluke T90 Voltage & Continuity Tester-Yellow www.amazon.co.uk/dp/B00CSRYG8A/ref=cm_sw_r_cp_tai_i_DlhdBbG6FKKYB |
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Post by glowbug on May 28, 2018 21:46:54 GMT
As a general rule electricity and water don’t mix well in any enviroment👻, don’t get pen wet and it’s fine. I don’t like them , but have got one in the box, along with multi meter and duspol testers , similar to your link dp. Most sparkies use the voltage tester and most have a pen aswell even if they don’t admit it😭
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Post by boilerdoktor on May 29, 2018 14:05:22 GMT
If your not decent on electrics and testing you can do a lot of dead testing of components. Test stats for continuity on ohms. You can do the beep test etc on the old ones.
it depends what you are testing system wise. If you turn the stat up to create a demand on a y plan the white should have 230v. Testing between earth and white. On an splan the brown will be 230v
if it’s a simple set up with say a combi, the stat is wired back to boiler. You need to test at the switched live back at the boiler. On worcesters that is “ LR “ or live return. Again test it across neutral and LR or earth and LR . Or if you feel better dead testing kill the power and test across it using ohms
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Post by dickpuller on May 30, 2018 17:52:18 GMT
If your not decent on electrics and testing you can do a lot of dead testing of components. Test stats for continuity on ohms. You can do the beep test etc on the old ones. it depends what you are testing system wise. If you turn the stat up to create a demand on a y plan the white should have 230v. Testing between earth and white. On an splan the brown will be 230v if it’s a simple set up with say a combi, the stat is wired back to boiler. You need to test at the switched live back at the boiler. On worcesters that is “ LR “ or live return. Again test it across neutral and LR or earth and LR . Or if you feel better dead testing kill the power and test across it using ohms Great advice BD👍 Something else that’s worth it’s weight in Gold is a Voltstick. Not expensive, but could save your life. Anyone, yes anyone!! Working on pipes, sinks, boilers, cylinders etc etc, take 1 minute & put your Voltstick on anything metal, if you touch it & a pipe for example & there’s a short in the leccy system, you become the best conductor in the country since On the Buses!!!! Perhaps Tom would be kind enough to do a video on the harzards of Electrical shorts & how a Voltstick could save your life. Be careful out there chaps👍 Along with a Pen or Pencil, carry a Voltstick on your person, slip it into your work trousers or kilt. |
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Tom calibrates his with a hammer 
