Volts on a loop test?

[ericmark]

I am used to the loop impedance tester showing ohms and amps, the loop impedance and the PSCC, but my cheap tester shows ohms and volts. and not sure what the volts relate to? I looked at this

at £60 and the one shown at £75 and thought worth the extra £15, and the RCD test is A1, even if the loop test seems a decimal point less than most testers, but that must be better to a tester which passes at 1.7 Ω or was it 1.9 Ω clearly designed for radials only.

However, what are the volts for? The instructions have some odd English, I assume "Jump-off time" is RCD tripping time, so "Contact voltage measurement" it seems to call it.

What is Uc am I being thick?

 

[JohnW2]

I am used to the loop impedance tester showing ohms and amps, the loop impedance and the PSCC, but my cheap tester shows ohms and volts.

What sort of 'volts' figures is it showing?

 

[ericmark]

0.01 volts, and press button 0.3 ohms.

 

[JohnW2]

0.01 volts, and press button 0.3 ohms.

Well, if it used a test current approaching 30 mA, then with a loop impedance of 0.3Ω, the resulting voltage would be not far off 0.01 V (certainlyl 0.01 V 'to two decimal places) - but 'approaching 30 mA' is really too high a test current to avoid RCD trips, .... so I don't know

 

[ericmark]

At least not just me, I was wondering if I was having a senior moment.

The default is the volts, which is a bit odd, since I don't want to trip the power, only tested the RCD test with the RCD sockets as yet, but other than only one decimal point, seems a good tester.

 

[JohnW2]

At least not just me, I was wondering if I was having a senior moment.

Maybe there are some people who are wiser and/or younger than us who may have some ideas/thoughts?