PCS10 reading multiple times problem

Instruments PC Oscilloscopes and Recorders
1

Hi,

I have a PCS10 device and made a program in c++ to communicate with it and it works fine, but I am getting a problem when I set the gain and read the data from the device most of the time it gives me wrong values.
What the program does is:
It reads the values in the Channels first with gain of 30V (because I don’t know yet what are the values), then check the values if they are less than 15V , 6V or 3V, then I set the gain depending on these values and reread again to get more accurate values, and this operation is repeated several times.
When I use a delay of 400 ms between the first and second reading I get correct values from the reading, but When I remove this delay I get wrong readings.
Is there any way to make this 400ms delay less or could you please help me to get more accurate values?

Thanks,

David

2

Are you getting good values if there is used fixed gain setting without the automated gain update?

3

Thanks for you fast reply, When I measure with a fixed gain I get correct results.

4

OK. It seems there is need for some extra delay after each gain setting update or change.
I’m sorry, this is the delay due to the low USB communication speed.

BTW:
Have you downloaded this package from:
velleman.eu/support/download … cs10&type=
Software
DLL for K8047 (PCS10) for faster communication

5

I have tried the dlls in the link, but It is still giving me the same problem some values are correct and others are not.

Thanks a lot for your help and have a good day,

David