Hello Group,
i have post this messages yesterday already in labwindows-cvi.general,
but i think
perhaps it will fit here better.
Since i have upgrade to Labwindows/CVI 6.0, i get strange result from
my HP Power Supply (HP E3631A), using the GPIB interface.
For example:
If i have a device connected to the Power Supply i can see the
following result on the instruments display.
1. Channel Output 5V 0.300 mA current
2. Channel Output 12V 0.124 mA current
If i want to read this result over the gpib interface (using the
hpe363xa_Measure function) i get difference results:
1. Channel Output 5V 3.000 mA current
2. Channel Output 12V 1.24 mA current
or
1. Channel Output 0.5V 30.00 mA current
2. Channel Output 0
.012V 12.4 mA current
or
1. Channel Output 5V 3.000 mA current
2. Channel Output 1.2V 0.124 mA current
If i do the measurement twice in follow i get the correct result with
the second function call.
Example:
1.Call of hpe363xa_Measure give this results:
1. Channel Output 0.5V 30.00 mA current
2. Channel Output 0.012V 12.4 mA current
and the 2. Call give this (correct) results:
1. Channel Output 5.0V 0.300 mA current
2. Channel Output 12.0V 0.124 mA current
I have downloaded the latest driver for the HP Power Suply from the
Nation Instruments Website (old is dated 05/17/99 and the newest dated
06/14/2000), but without improvement. Both driver Version give the
faulty results with CVI 6. With CVI 5.5 i have no problems reading the
correct values over the GPIB-interface.
Remark: A second call of the same function would return the correct
values, but the first call does not.
Can someone please point an assertion for the described behavior?
I would be very gratef
ul for each assistance
kind regards
Gregoire Diehl
