Hello,
Here, there are few details about my systems. Basically I have 3
SCXI1303 with a total of 96 channels and 1 SCXI 1320 with 8 channels.
They are disposed in a sassy SCXI-1000. We use SCXI 1320 to get
measurements for voltages and SCXI1303 to get measurements for
temperatures.
From SCXI 1303, we are using 88 channels (40 can be seen on the white line of the graph and 40 can be seen on the red line of the graph) for
measurements of the wall temperature (as can you see in the graph) and the others until 96, to
measure coolant temperature. The thermocouples are K type manufactured
by Omega company and they have a precision of 1.2 C. We suppose to take
measurements in a range from 20-800 C. As you can see in the picture,
couples of the thermocouples have wrong indications. As soon as we rise
the electrical power (i. e currents through the pipe walls), the thermocouples represented by the red lines
have totally wrong indications (the pictures from attachment are not the worse
one!). We suspect the reason for these failures are SCXI 1303. Does any one of you has this problem? How can be solved? I know that SCXI 1303 has not galvanic isolaton. Could be this a reason?
Thank you,
Ionut Anghel
