Shunt Verification - Setup - HBM Genesis GEN5i User Manual

I2679-4.0 en

Shunt verification - setup

You can use a shunt resistor to verify a bridge: when you connect a shunt
resistor in parallel with resistor R4 (A-C) or R3 (C-D) of the bridge this will
produce an output signal simulating strain: a deflection. With known resistor
and excitation values you can calculate the theoretical deflection. You can
compare this with the measured deflection.
The following options are provided:
Select the active bridge arm: A-C or C-D.
l
Select between an internal or external shunt resistor.
l
When internal select between:
l
Factory installed: 20 kΩ or 100 kΩ precision resistors.
l
User installed: you will need to add the resistor on the plug-in module
l
on the location marked CAL. Refer to Figure 12.9 on page 266 for
electrical/schematic details and to for mechanical/location details.
Additional wiring
When using remote calibration / shunt verification you will need to add the
following wiring:
Connect point A of bridge with pin 11 (Remote Cal +) of connector.
l
Connect point D of bridge with pin 12 (Remote Cal -) of connector.
l
Connect point D of bridge with pin 12 (Remote Cal -) of connector.
l
In addition: when using an external shunt resistor connect this resistor
l
between pin 14 (External Shunt A/D) and pin 13 (External Shunt Common)
of connector.
For an example refer to Figure 12.15 "Full bridge with remote sensing and
remote calibration " on page 271.
In Perception
To make the required settings in the Perception software do the following:
1 In Perception go to the Settings sheet.
2 In the task pane select the Bridge in the Input section.
3 Select one or more channels.
GEN5i
283