Products > Test Equipment

FNIRSI-1013D AS MUCH USE AS A CHOCOLATE FIREGUARD.

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pcprogrammer:
Hi George,

which signal are you measuring? Not sure if probing the scope with itself works properly. There is the shifted ground issue to consider.

It would be an interesting object to play with 8)

Did you order another display to test it with?

Cheers,
Peter

Gannet:
Hi Peter, still waiting on the new display,
I'm probing the calibration input on the top of the scope; I assumed it was a square wave 1V test point.
However, I'm using a small square wave generator, have a look see at the results.

Cheers George

pcprogrammer:
Hi George,

in both cases it seems to measure some 50Hz signal. Is that the mains frequency in your neck of the woods?

The calibration signal of the scope should be a 1KHz square, so if that is what you are connected to in the first picture you showed, the period time is 1ms, and your scope is set to 5ms/div and 20KSa/s, so it should show 5 periods per division, so yes something is wrong.

In your second picture it looks like it is picking up just the mains on an open probe.

Weird things happening indeed.

I just noticed that the pictures saved on the scope won't open on my Ubuntu machine. So have to do some digging of my own on why that is.

Regards,
Peter

Gannet:
Hi Peter, yes I believe it’s pretty goosed, do yo fancy having a go of for me ?

I think it’s beyond my level, I’ll bet you a Haggis that the display is not the issue and if it’s not I’ll let you have it when it arrives

Yes we are on 50 hz in the Uk
Cheers

George.

pcprogrammer:
Hi George,

You might be right that there are several issues with it than just the display. After you try the display when it arrives, and it does not solve the problem, I'm willing to give it a go. Having a working one and several other scopes besides it, at least gives the option of probing them to compare the signals and hopefully trace the problem.

I don't bet because I never win :-DD

Regards,
Peter

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