08-28-2012 11:40 AM
Hello,
My NI WSN 3212 doesn't work !! Measure at all channel are -243°C for a temperature of 20°C ??
Configuration : thermocouple type K, -273°C à 1028°C
No erreur in LabVIEW
Soft : LabVIEW 2009, NI WSN 1.3, MAX 5.0
Firmware Gateway : ni9791fwROM_LV861_LV2009
Firmaware Nodes : NI WSN 3212 1.3.0f4
Thanks.
08-30-2012 05:37 PM
HI Phillippe,
Are the settings on the WSN 3212 set for a K type thermocouple and did you deploy the settings once changed?
Does the value change when the thermocouple is heated or cooled, or is it always -273?
If you short TC+ and TC- of a channel with a short wire what reading do you recieve?
If you disconect a thermocouple or the wire from a channel what does it read?
Cheers,
Brian A
R & D Product Support Engineer | WSN/Network DAQ/Academic
National Instruments
08-31-2012 01:55 AM
Hi Brian,
Are the settings on the WSN 3212 set for a K type thermocouple and did you deploy the settings once changed? YES
Does the value change when the thermocouple is heated or cooled, or is it always -273? NO, the value change
If you short TC+ and TC- of a channel with a short wire what reading do you recieve? the value not change always around -243
If you disconect a thermocouple or the wire from a channel what does it read? NaN
The DIO of the node is OK (read and write)
All channel K thermocouple NOK
Thanks.
08-31-2012 08:47 AM
Philippe,
It sounds like the WSN 3212 thermocouple channels are functioning however the cold junction calibration is severely off. Please call the National Instruments support line for your area and have them set you up an RMA. The calibration cannot be changed in the field so must be sent back to correct.
Cheers,
Brian A
R & D Product Support Engineer | WSN/Network DAQ/Academic
National Instruments