Offset A, Offset B (Pressure)

Default: 0
Range: -32768 to 32767

 

TIP: On the Tools menu, click Scale/Offset Calibration to help calculate Scales and Offsets.

 

The Offset fields have different uses depending on whether the axis will be used for differential force or single-ended pressure.

For single-ended pressure, Offset A is used with Scale A to convert Counts A to Actual Pressure; it shifts the Actual Pressure with respect to the analog input zero. Offset B is unused.

For differential force, Offset A is used with Scale A to convert Counts A to Actual Force A while Offset B is used with Scale B to convert Counts B to Actual Force B. Both offset the force units by their amount.

 

These offsets can be defined in either of the following ways:

image\ebx_477873304.gif

image\ebx_1842544732.gif

 

In the above equation, P0 and P1 are two pressure or force values in the desired pressure or force units, and C0 and C1 are the corresponding counts given in the Counts A or B field.

Click here for Pressure/Force Scale and Offset examples

Why Bother?

These offsets can be used to set your 0 point at any pressure reading. They are often left at 0 for voltage feedback gauges (e.g. 0 to 10V or 0 to 5V), but will likely need to be non-zero for current (4 to 20mA) gauges. This is because zero pressure or force units will have zero counts on a voltage gauge, but will have 6500 counts (4mA) on a current gauge.

 


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