Driessen1
2008-06-30 17:40:12 UTC
We currently bought a CDAQ-9172 8 bay USB station and 4 NI9205 modules for use of measuring 64 channels of T-type thermocouples.
The problem is as follows:
One module plugged in the chassis. Freshly booted PC, DAQ turned off.
Chassis is turned on. Computer recognizes the chassis and all the modules installed (in this case one). The wanted module is selected and SignalExpress is started.
Standard signalexpress openes with the voltage readout on all channels. The measurement is stopped. The voltage measurement is deleted and with Add Step, a Thermocouple Type T anaolgue input is selected.
CJC is set to channel one as was indicated in the other forums. We start the measurement.
Now two things might happen.
1. The values read out fine for about 2 to 3 minutes and suddenly decide to run off to -inf.
2. All readings are fine and will run for more than 30 minutes
Even more troubling is that when we install the other modules, reactivate the chassis and restart signal express all values immediately run through to -inf.
We've tried each module seperately at all the different places and the issue described above stays ...
Does anybody know what to do or should we return the equipment to the company we've purchased it from ?
The problem is as follows:
One module plugged in the chassis. Freshly booted PC, DAQ turned off.
Chassis is turned on. Computer recognizes the chassis and all the modules installed (in this case one). The wanted module is selected and SignalExpress is started.
Standard signalexpress openes with the voltage readout on all channels. The measurement is stopped. The voltage measurement is deleted and with Add Step, a Thermocouple Type T anaolgue input is selected.
CJC is set to channel one as was indicated in the other forums. We start the measurement.
Now two things might happen.
1. The values read out fine for about 2 to 3 minutes and suddenly decide to run off to -inf.
2. All readings are fine and will run for more than 30 minutes
Even more troubling is that when we install the other modules, reactivate the chassis and restart signal express all values immediately run through to -inf.
We've tried each module seperately at all the different places and the issue described above stays ...
Does anybody know what to do or should we return the equipment to the company we've purchased it from ?