MTS Series 793 - Manual (Page 204)

How to Update the Shunt Reference Value
Only update the Shunt Reference Value after you perform an official calibration using a laboratory standard
reference sensor.
1. In the Station Manager toolbar, select an access level of Calibration.
2. Perform the shunt-calibration procedure.
To make the Current Shunt Value the new Shunt Reference Value, click Update.
Shunt Tab
Use this tab to perform shunt calibration checks of DC conditioner/sensor pairs. Shunt calibration verifies the
operation of the sensor/conditioner pair circuit.
This tab’s controls vary slightly depending on the type of DC conditioner used.
Access
Station Setup window > navigation pane > Channels force control mode > > Shunt tab.
Shunt Tab
Description Item
Sets the gain applied to the sensor’s output signal. Gain
Total and Pre-amp Gain cannot be adjusted with hydraulics on.
Set the coarse gain applied. Pre-Amp
Sets the fine gain applied. This control’s range is user adjustable. Post-Amp
Displays the total gain applied. This value is a function of Pre-Amp and
Post-Amp values. Total
Entering a Total value causes the Station Manager application to enter
the Pre-Amp and Post-Amp values required to achieve this value.
Sets the excitation applied to the sensor. The proper excitation is usually
specified by the sensor manufacturer. Excitation (p-p)
Typically DC sensors require a 10 V DC excitation signal.
(+) Shunt—Connects the shunt resistor to a positive arm of the sensor’s
resistive bridge circuit. Select Shunt Type
(Available for FlexTest IIm only)
(–) Shunt—Connects the shunt resistor to a negative arm of the sensor’s
resistive bridge circuit.
Displays the saved shunt reference value. Shunt Reference Value
Makes the Current Shunt Value the new Shunt Reference Value. Update
Displays the current shunt value. Current Shunt Value
204 MTS Series 793 Control Software
Station Setup