00809-0100-4835 Rev BE
Figure 3-4b – Example for Zero Based
Calibration (SI Units)
Range 2 for a calibration of 0 to 24,9 kPa (24,9 kPa span)
1. Adjust the zero: With 0 kPa applied to the transmitter,
turn the Zero adjustment until the transmitter reads 4
mA.
2. Adjust the span: Apply 24,9 kPa to the transmitter
high side connection. Turn the Span adjustment until
the transmitter output reads 20 mA.
3. Check to assure desired outputs are achieved and
repeat steps 1 and 2 if necessary.
Elevated or Suppressed Zero
Calibration Procedure
The easiest way to calibrate a 3150 Series pressure
transmitter with an elevated or suppressed zero is to perform
a zero-based calibration and then elevate or suppress the
zero by adjusting the zero adjustment screw and, if necessary,
the coarse zero select Jumper.
For large amounts of elevation or suppression, it may be
necessary to reposition the coarse zero select jumper.
Procedures for re-positioning the jumper are described in the
Coarse Zero Select Jumper Position Selection Procedure.
Figures 3-5 and 3-6 contain examples of calibrating a
transmitter with an Elevated Zero and Suppressed Zero
calibration respectively. Figures 3-5a and 3-6a use English
units (inH2O) while Figures 3-5b and 3-6b use SI units (kPa).
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