measure

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  1. D

    How to measure DC motor field winding resistance?

    Hello, I need to understand whether a DC motor is sturdy or not. The support person told me to measure the armature and field winding resistance. How to measure DC motor field winding resistance? Would you help me with this topic ? I measure the armature connections between both windings as...
  2. B

    Can’t measure R1+R2, can I calculate it instead?

    Hi forum, A question about R1+R2 testing. I’m testing a lighting circuit. It’s an old circuit with old colours. In the control panel feeding the circuit there is no earth cable feeding the lighting circuit, only an earth cable bonding the control panel to the strands of the armoured cable...
  3. V

    best way to measure shading on a roof

    hi we cannot get hold of a pv shading tool / pv horizon meter anywhere. How do others measure shading on a roof please?
  4. B

    How to measure impedance/resistance of an AC circuit

    Hi, I’m fairly new to all things electrical but I’ve recently taken more of an interest after having a CU fitted to my shed. Is it possible to measure the impedance or resistance of an AC circuit with a basic multimeter? I tried to do this by connected each electrode over the positive and...
  5. spud1

    Can I measure the level DC 'leakage' current piggy backing on an AC supply?

    Hi ! Much talk of the use of type A, type B and Type F RCDs recently. As we know all are specified at varying levels to ignore the blinding effects of transient DC currents, that are being superimposed on our AC circuits by modern technology. But is there a means to measure the level of this...
  6. A

    Can you measure the grounding on an UPS output?

    Just installed an UPS and I have a multi-meter that I use to check if a wall outlet is grounded Just tried it on one of the UPS outlets (2 prong) by placing the multi-meter red probe to the metal and the black one to the right side of the outlet and it reads 0 Is this normal? Same measurement...
  7. R

    Which Tape Measure

    Can anyone recommend a decent tape measure?
  8. J

    If you drive a metal rod can you use it as a reference to measure voltage

    If I was to drive a metal rod in the ground and measure between live and the rod will I get a reading? ( I’m still studying)
  9. M

    How to measure current in multimeter without series connection

    View: https://youtu.be/AVrwvGMcM-Q
  10. H

    Clamp meter that will measure milli amps

    Afternoon all. I’m looking to invest in a clamp meter but want want that will measure milli amps (nuisance tripping etc). The megger 305 seems the best about; is there any others out there? TIA.
  11. spud1

    Measure or calculate your Zs?

    Hi again! Which value is best to record in a certificate or report, a max measured or a calculated Zs? I know Sparkies who do it both ways, but personally I take measured values at all the points of utilization to find the highest, then I calculate Ze+(my highest R1+R2) for the circuit and...
  12. naylorpd

    Digital tape measure

    I'm toying with a digital distance measure for my Christmas pressie for me...had one a few years ago but I never trusted it and always ended up checking with a steel tape. So...do you use a digital tape measure, and to what extent do you trust it? Over how long (or short) a distance do you...
  13. O

    Laser measure devices - suggestions please

    Fed up with using a tape measure and in the market for a laser device Any suggestions? Recommendations from personal experience? Thanks
  14. J

    Why do Megger MT1700 Teaters Measure IR to 999 Megohms

    I have got a new Mt1720 Megger tester and it measures to 999 Megohms. the old one my boss loaned out to me and my assesment testers only go up to 299 Megohms. Why do they go so high now?
  15. R

    How do you measure 3 Phase Supply confirming it is correct as in 400V between phases etc.

    I have my AM2 exam and the question I have is how would you confirm supply polarity? Would you do the following tests:- L1-L2 L1-L3 L2-L3 L1-N L2 - N L3-N L1-E L2- E L3-E doing this you should expect 400V reading? Finally, test Neutral to Earth and expect to be 0 volts. Would the main...
  16. sam400

    New tape measure recommendations

    hi tool tarts my fatmax Xl tape measure snapped today absolutely gutted - it only lasted 8 years of daily use! Anyone recommend me a good one? I’d like to get an all metric one this time, and must have good stand out, think my fatmax could do 3m Cheers Sam
  17. Jamchiv01

    Are Digital Laser Measures as good as the internet makes them out to me?

    Hello all, recently I was installing some new downlights in a large kitchen, and trying to measure the room width/length alone was a nightmare with a tape measure so I did some research on laser distance measures and they seem to be a good way to go. Has anyone ever owned one and are they as...
  18. R

    Diamensions of Proteus Isolator please.

    Hi, I'm trying to buy a Proteus isolator the same diamensions as the two that we already have. The current two are mounted and cannot be turned off to be opened without severe disruption to find out the rating. So, I would be grateful if someone could measure the diamensions of one you may...
  19. D

    Multimeter for low current DC use...

    Hello lovely people, been ages since my last post. Who can recommend a reasonably priced multimeter to diagnose a van which is flattening it's battery... They all seem to spec the highest direct current they can handle, but I'm interested in how low they can go reliably... Van battery is...
  20. eckardt

    Show Your Test & Measurement Instruments

    Metrel MI 2077 TeraOhm 5 kV Chauvin Arnoux C.A 6410 Metrel MW9600 Metrel Eurotest 61557 - MI 2086 Metrel Test Leads

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