Section 6
6-16
Interfacing
as channel
43
(Pressure). Specifying the Auxiliary Destination as channel 43
causes any constant pressure entered in FCT 77 to be ignored.
The response curve for the pressure sensor is given by the equation
Y = A + BX + CX
2
where Y is the sensor output (in kPa), X is the mV output of the sensor, A is
the Y-axis intercept, and B is the calibration multiplier, which is equal to the
slope of the line representing the sensor’s response (Figure 6-7). On the
6262-03 calibration sheet the offset A is given as FCT 71, and the multiplier
B is given as FCT 72. Enter these values into the software at FCT 71 (Aux
A) and FCT 72 (Aux B). Make sure that FCT 75 (Aux C) is set to zero.
These values convert the mV output of the pressure transducer to pressure in
units of kPa.
Y
0
A
X
Slope = B
Figure 6-7. Response curve for pressure sensor.
Example:
On the 6262-03 calibration sheet the values listed are as follows:
FCT 71 = 58.239
FCT 72 = 0.01510
FCT 73 = 43
FCT 75 = 0
Enter the above values into software:
