Rosemount 3152, Reference Manual

Page: 34 / 80

Rosemount 3150 Series
Reference Manual
00809-0100-4835 Rev BD
July 2016
3-7
Figure 3-4a – Example for Zero Based
Calibration (English Units) Range 2 for a calibration of 0 to 100 inH
2
O (100 inH
2
O span)
1. Adjust the zero: With 0 inH
2
O applied to the transmitter, turn the
Zero adjustment until the transmitter reads 4 mA.
2. Adjust the span: Apply 100 inH
2
O 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.
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.
NOTE
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
Zero Elevated and Suppressed zeros. Figures 3-5a and 3-6a use
English units (inH
2
O) while Figures 3-5b and 3-6b use SI units (kPa)