Pickering 41-670 - Null Offset Configuration

Page 4.12
SECTION 4 - PROGRAMMING GUIDE
PXI/PXIe LVDT/RVDT/Resolver Simulator Module 41/43-670
pickering
Set Null Offset
When dealing with very small LVDT positional changes, the extremes at -100% and +100% will not be zero, for this
use the Null offset function to dene the minimum voltage. This does not change the Vsum value it just applies a
positive offset to the lower voltage.
Note: This is only valid for Mode1 - 5/6wire operation and -100% to +100% control method.
Example:
Vsum (Vmax) = 5V or 5000mV Null Offset = 2V or 2000mV
Vsum (Vmax) = OutputA + OutputB – Vnull
Output
Voltage
Core Displacement
-100% +100%
V
0
0
Output A Output B
5.0V
2.0V
Null Offset (mV)
Figure 4.12 - Voltage Output for Core Displacement With Voltage Offset
Figure 4.13 - Null Offset Feature