Apply shunt calibration to one or multiple bridge circuit channels simultaneously.
Use shunt calibration to adjust for errors on your bridge circuits caused by
resistance of the lead wires between the EX pins on the device and the strain
To use shunt calibration, channels must support strain/bridge measurements and you must
properly configure them. Specify Bridge Configuration and
Bridge Resistance for any channels you want to perform a
shunt calibration on. Refer to the Supported Hardware topic to
confirm that your device supports strain/bridge measurements.
In your Channel Specification document, select all configured strain channels
you want to calibrate.
In your Channel Specification document toolbar, click the Calibrate
channels button .
Select the Shunt calibrate option.
Specify the shunt calibration parameters.
- Built-in—Use the module's internal shunt resistor
- User-provided—Use an external shunt resistor
- Accessory—Use the internal shunt resistor of a connected
||Specify the location of the shunt resistor on the bridge sensor.
- R1—Between VCH- and VEX+
R2—Between VCH- and
- R3—Between VCH+ and VEX-
- R4—Between VCH+ and VEX+
||Specify the value of the resistor you are using. If you are using the
Built-in option, refer to your device
documentation for this value.
Click Calculate. Configure the channels and ensure they
are not disabled or contain errors. You cannot perform shunt calibration on
channels with errors.
After you perform a calculation, the details of each channel update to
display the calculated shunt gain adjustment value. If the calculated value
is outside the valid range (0.5, 1.5), the channel fails the calculation. If
any channels fail shunt calculation, the calibration toolbar displays an
error icon along with the number of failed channels. Each failed channel
displays an error in the Channel Specification document.
Resolve any shunt calibration errors.
A channel can receive an invalid calculated shunt gain adjustment value for
- The channel received one or more unsupported shunt configuration
- An issue exists on the sensor, such as physical damage or data
- The sensor was disturbed or not at rest during calibration.
After resolving errors, select the affected channels and
click Calculate to calculate a new shunt gain adjustment
value. If the new calculated value is within the valid range, the error on the
channel is cleared.
If you want to proceed without fixing the error or the error cannot be fixed, you can clear
the shunt calibration errors in one of the following ways:
- Close the calibration toolbar. Uncalibrated channels will retain
their previous values.
- Choose a different calibration type, Null
offset or Zero.
Click Apply all.
All channels with a valid calculated shunt gain adjustment value apply
the value, completing the shunt calibration. The details of each channel update
to display the applied value and a timestamp of when the value was applied. If
no channels with an invalid calculated value remain, the calibration toolbar
After the calibration toolbar dismisses, hover over the calibration icon
any calibrated channel to see the values from the last calibration