WIKA IUT-11 - Manual (Page 38)

Universal IS Pressure Transmitter UniTrans
Operation of Devices without Displays
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8.3 Calibration with Pressure
8.3.1 Zero Point Calibration
8.3.2 Span Calibration
Calibration of the measurement range (span).
Make sure that the pressure to be used as the zero point (P 0 %), is
present at the transmitterer diaphragm before calibration.
Make sure that the pressure to be used as the span end-point (P 100 %) is
present at the transmitter diaphragm. The measuring range between zero
and end value of span is saved as span.
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.
A mounting correction must not be carried out when making an adjustment
with pressure (wet adjustment). Otherwise, the mounting correction must
be carried out before saving the zero point and the end value of span.
meas
Zero point calibration
Calibration Value
Confirm
Function
(2 sec.) (2 sec.)
(2 sec.)
024-DS-GB
meas
Calibration of span
Calibration Value
Confirm
Function
(2 sec.) (2 sec.) (2 sec.)
025-DS-GB