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

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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

Tags: NI Hardware

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