Test control

Shunt control

Shunt control allows installation and removal of shunt resistors during a test run. If the current test contains one or more applicable channels, click Shunt.... The Shunt Control dialog is presented.

To install the shunts on all applicable channels, which is every channel in the test defined using one of the Bridge sensor input modes, select one of the following shunt modes.

Normal: This mode is based on the System preferences Bridge shunt polarities parameter set unless the bridge channel is configured to use the internal shunt resistor scaling mode. In this case, the Normal mode is the polarity defined in the sensor scaling configuration.

Opposite: This mode will apply the opposite shunt polarity relative to the Normal shunt polarity for all channels where it is supported by the hardware.

Up scale: This mode will apply the Up scale (positive swing) shunt polarity for all channels where it is supported by the hardware.

Down scale: This mode will apply the Down scale (negative swing) shunt polarity for all channels where it is supported by the hardware.

NOTE
Shunt polarity is based on electrical units scaling (i.e., mV/V scaling). If the sensor scaling slope is negative, the shunt polarity in output units is in the opposite direction. For example, the Up Scale option would result in a negative swing in the output data.

To remove the shunts, select Remove shunt.

All shunt resistors are removed at the start of a new test.

NOTE
The Shunt Control dialog can remain open while navigating the web application and closes automatically at the end of the test run. (It is also closed if the web browser is reloaded or refreshed.)