I have no way of knowing.Do you think that the drift seen must be due to atmospheric pressure change and not due to any problem with the sensor?
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I have no way of knowing.Do you think that the drift seen must be due to atmospheric pressure change and not due to any problem with the sensor?
Not like that. Why it is not working and can it be used.Sort of sound like, we bought this, make it work. That sort of scenereo happened when I was hired for my first real job.
Is there any tests I can do here to confirm that?I have no way of knowing.
I mean why the voltage output is not stable and whether this sensor can be used for my application. These are the questions for which I try to find answer. Not "we bought this, make it work". That is only your interpretationNot like that. Why it is not working and can it be used.
See post #48.Is there any tests I can do here to confirm that?
OkSee post #48.
I've been there a few times in the '70s when I worked for Bristol Aerospace launching Black Brandt Rockets.One of these (except this one has instructions)?
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I had the temperature sensor readings also .If you see any anomalies , I will arrange the readings again. The Air Conditioner in the room was intermittently switched ON and OFF. My work place is shifted and it may take some more time to fix this set up as the new place doesn't have sufficient height (due to false ceiling) to fix the pipe.See post #48.
AS it turned out that only took me a few minutes Temperature Correlation is indeed useful for improving the accuracy.Prem, if you have this data in Excel, try plotting the values on a graph.
It looks quite interesting, I am not sure what it proves but I think it is interesting.
JimB
The ADC is not coming to picture. I am taking direct voltage readings.i wish you could get a more accurate reference and analyze your errors.
As I mentioned before, my test set up is disturbed due to office shifting. Once it is set up, I will start my testing again. All the valuable suggestions I got through this forum will be tried out then.AS I said before the reference is the Bandgap reference voltage in both DMM and ADC needs to be temperature stable. <<+-1 deg C
E.g. with some effort , you can make a 1V stable reference, then you could subtract this and measure in a lower scale and improve accuracy.
Then you could investigate RF effects by putting on a small RF cap and observe and many more things. This is getting repetitious.