Pickering Interfaces is expanding its range of sensor simulators in PXI with the introduction of the 40-265 Strain Gauge Simulator.
Simulating a resistive strain gauge can be a difficult task; the change in
resistance value caused by applying stress to a strain gauge is extremely
small (typically 0.1%) and requires very fine control of the resistance
value. Many users resort to in house methods of simulation which are hard to
support and lack traceability, or they have to adapt commercial products
that provide very limited performance. Pickering Interfaces has made this
much simpler with the introduction of the first commercially available
Strain Gauge Simulator in PXI.
The 40-265 provides 6 channels of strain gauge simulation with high
simulation accuracy and performance. Each channel provides a full bridge
circuit with very fine resistance control of better than 2 milliohm in one
bridge arm, allowing the 40-265 to emulate the operation of a strain gauge
bridge circuit. The bridge can be excited by a fixed internal supply or by
independent external bridge voltage sources, permitting direct connection to
strain gauge measuring systems.
The 40-265 is controlled by simple resistance calls to the variable bridge
resistor, and each channel has a stored resistance value at which the bridge
is balanced. Users can simply set the bridge to the balance point and then
offset the bridge using the very fine control of resistance provided by the
40-265 to simulate applied strain. The bridge output voltage is provided
directly to the user connector. The 40-265 permits the user to simulate an
open connection for fault simulation.
A calibration port provides a simple way of using a DMM to monitor the
channels and to support in house calibration of the strain gauge simulator
with an external DMM.
www.pickeringtest.com
::Design World::