Wavy jagged singal of 9237 at no load condition

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• load cell 9237 + full-bridge: load cell_null_off_shuntcal.vi - error 200077

  I try to use load_cell_null_off_shuntcal.vi with load cell (Honeywell model 31, not amplified). I'm using LabView 8.6, cDAQ-9172 and NI9237. Entries: excitation10V internal; mV/V 2.1492 (calib. bin); weight 10 lbs max. resistance bridge 350 ohms (Honeywell specifications); 9237 internal shunt resistance 100 kohm; map of shunt R4 (default setting). Selected "offset null" and "shunt cal.

  Error-200077 occurred to Shunt calibration perform DAQmx
  . VI:1 (bridge) or the possible reasons:

  Measurements: Requested value is not a supported value for
  This property.

  Property: I. Bridge.ShuntCal.GainAdjust

  You asked:-61.980405e3

  Valid values begin with: 500.0e - 3

  Valid values ending with: 1.500000

  If "shunt cal' green button not selected, no error. Setting the gain should be about 1. Subvi DAQmx PerformShuntCalibration (bridge) .vi contains "Call library function node" which is locked (?).

  Any ideas?

  What is the location of item correct shunt for a full-bridge load cell? Change this location does not eliminate the error.

  Hello, YTC,.

  The problem is most likely in your external connections of the NI 9237 and the load cell.  As mentioned in NI 9237 Operating Instructions and specifications, page 9, SC + SC - pins must be connected to the terminals of the resistance specified in the .vi of Shunt calibration perform DAQmx (bridge) (in the case of a full bridge, it would be R3).

  Let me know if you still have problems with your calibration.

• Drift of signal on SCC-SG24

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• 9237 with deck full load cell: support cell_null_off_shuntcal.vi survey error 200077

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  font family: 'Calibri', 'sans-serif ';
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  Hello

  I'm trying to use the example
  load_cell_null_off_shuntcal.VI with a scale of full-bridge (Honeywell
  Model 31, not amplified). I'm using LabView 8.6, cDAQ-9172 and NI9237. The
  load cell is connected to the pins 2,3,6 and 7.

  Entries for the front side of the VI
  are: excitation10V internal; mV/V 2.1492 (calibration sheet); weight max 10
  lbs; resistance bridge 350 ohms (Honeywell specifications); 9237 shunt internal
  100 kohm resistance; map of shunt R4 (default setting). I chose
  "Do not offset null" and "shunt cal.

  This is the error I get:

  Error-200077 occurred at DAQmx
  Do a calibration Shunt (bridge) .vi:1 or the possible reasons:

  Measurements: Requested value is not
  support for this property value.

  Property:
  AI. Bridge.ShuntCal.GainAdjust

  You asked:-61.980405e3

  Valid values begin with: 500.0e - 3

  Valid values ending with: 1.500000

  If the "shunt cal.
  green button is not selected, there is no error. I understand that the Gain
  Change value should be approximately 1, whereas I get is much larger. The Subvi DAQmx PerformShuntCalibration
  .VI (bridge) contains a "Call library function node" which I did not
  find out how interrogate.

  Someone else has experience
  with this error? Do you have any advice on:

  1)
  How to 'see' the calculations being
  carried out inside the "call library function node"?

  2)
  What the correct shunt element
  a full-bridge load cell location is? (although changing this location only)
  does not eliminate the error, I can't find this info).

  3)
  What can I do wrong with
  my entries to cause this error?

  Thank you

  Claire.

  Hi Claire,

  You must physically connect the SC of arm of the bridge terminals (normally R3). The terminal is not provided for the connection of external resistors.

  See the example

  C:\Program NIUninstaller Instruments\LabVIEW 8.6\examples\DAQmx\Analog In\Measure Strain.llb\Cont Acq strain samples (with calibration) - OR 9237.vi

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