NOSHOK 756 Series Digital Pressure Transmitters - Manual (Page 17)

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5.3 Calibration with Pressure
5.3.1 Zero Point Calibration
5.3.2 Span Calibration
Calibration of the measurement range (span).
Determine if the pressure to be used as the zero point (P 0 %), is present
at the transmitterer diaphragm before calibration.
Ensure that the pressure to be used as the span end-point (P 100 %) is
present at the transmitter diaphragm.
A change in the zero point has no effect on the calibrated span.
However, if the span end-point is higher than the peak value of the sen-
sor’s nominal pressure range, then span end-point is fixed at this peak val-
ue and the span is reduced accordingly.
A change in the span setting has no effect on the zero point. The zero point
and span end-point must fall within the sensor’s nominal pressure range.
meas
Zero point calibration
Calibration Value
meas
Calibration of span
Calibration Value