Data logger voltage range and other
1) When I use the data logger, it appears that the voltage range always returns to 10V. Is that be design, or am I missing something? I wanted to log a 12V solar charger design, but can't.
2) Somewhere along the line, I must have inadvertently enable current measurement. It was on a live circuit, and the popped the fuse. I had a hard time getting the replacement fuse to make contact. Is there a better way to do this?
3) I have yet to be able to get the oscilloscope to trigger. Is it only rising edge? I drag the trigger line up and down, but I get nothing.
4) I made a times 10 cable for the input. That will help with some of my issues. The input impedance is pretty low, for what I expected. Does the impedance stay the same for all ranges, and from voltage to oscilloscope to data logger? It appears to.
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Hi Wayne,
Thanks for your post.
1) Yes, we are aware of this issue. It will be fixe on the new App release next week.
2) There's no better way to do this, if your fuse is not okay you can always get more at shop.pokitmeter.com
3) The oscilloscope has 2 ways of triggering. If the trigger is in auto then you have to press the red button in the middle to make it trigger. If you want to use the trigger level, then press the "Trigger auto" button and it will change to Rising trigger. If you want to change it to falling trigger, just press the rising trigger word that sits on top of the trigger line.
4) The input impedance is 1M Ohm for all ranges except for values under 1Volt, which goes is 2M Ohms.
Hope this answers your questions.
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1. Good to hear it will be fixed soon.
2. I think my spare fuse PCB was a touch too long, so it would not go deep enough to make a good connection.
3. Yes, I can set the trigger level, but getting it to actually trigger has been a problem. I have a pulse that is around 40us, from about 13V to 14V, that I was wanting to catch. Even using AC coupling, so it is 0V to 1V, doesn't help. I'll keep trying.
4. I made a X 10 input a couple of weeks back. It appeared to have a much lower than 1M impedance. I don't recall now what I saw. But it is working and giving me the proper results.
Also:
A. Is there a limit to the log size? I didn't see anything defined, but it appears to be limited.
B. The time in the log file appears to be meaningless. I suspect there is no real time clock in the Pokit. I would prefer that there was a header in the log file stating the step time and voltage range. Then the time for each step could be calculate back from that.
Thanks.
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An answer would be nice after 4 years.
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Sure,
Sorry about the long wait,
A.
Pokit Meter: 6000 points
Pokit Pro: 14000 pointsB. the logfile has changed since this Waynes original post it now contains the data hes hasked for:
it contains a start time and each sample has a time offset.
in the below example at 6:25:02 the voltage changes to 0.5V
Start Time: 30/05/2023 6:24:58 PM
Time (s) | Voltage (VDC)
0 | 0.1
1 | 0.1
2 | 0.1
3 | 0.1
4 | 0.5
5 | 0.5The voltage range is also in the logfile
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