Discuss Voltage Testers & Proving Units in the Electrical Tools and Products at Electricians Forums Discussion Boards; Hi guys, I know this has been covered quite a few times but as I think it is possibly the most essential tool an electrician should have in his bag, ...
Hi guys, I know this has been covered quite a few times but as I think it is possibly the most essential tool an electrician should have in his bag, I would like to start a thread on what you guys use/feedback and also pro's & con's.
After using Fluke models for quite some years mainly the T3 and T5, I was a bit disappointed to find that their newer T50,T100,T120 & T140 will trip an RCD unless you test between L&N first for a few seconds before testing between L&CPC.
I have spoke to a local company who is going to lend me a few testers on Wednesday for a few weeks and I can hopefully give them all a little test and review on here (combined with my own testers).
I am getting hold of:
Testmate ET100 (Same as sold by NICEIC)
Testmate ET200 (Again as NICEIC but with LCD display)
DI LOG DL6790
DI LOG DL6780
If you could leave any views on what you have it would hopefully be a useful place to keep adding any new testers which come onto the market (Megger TPT210 & 220 out soon I believe)
Also do you own a proving unit or do you just use a known source?
I have added a poll just for fun, please add your make if you have time. Thanks
I have got a question: Let's suppose a safe isolation procedure after switching power off... Step1. I test my voltage detector (v.d.) on the proving unit. Step2. Check for 230 V...? None. Step3. Check on proving unit if my v.d. is still working... Ok, working. But... If the proving unit is testing my v.d. on 690V (pretty high), how can I be sure, that it detected 230V (lower value)?
Do you follow me?
The voltage of 230V was tested to be "not present". But maybe it was present... only my v.d. was not sensitive enough to pick it up (some circuitry problem, some resistor burnt out, etc.). And it needed 690V to operate.
Analogy: It's like testing water pressure of 1 bar with an instrument, that was proved to be working... but at 5 bar. Ok. It will work at such an elevated pressure but it doesn't mean it will detect 1 bar. So I don't know if that 1 bar is present or not.
Now, I think that a standard 9V battery would be a much better solution. If my v.d. can pick up 9V, it means it is sensitive, and it is working, and every other value over 9V will be picked up as well.
Do you agree?
Or: what would the inspector answer?
I am asking because Megger launched a proving unit which test 5 levels of voltage.