Emerson Rosemount 3152 - Page 41

Reference Manual
00809-0100-4835 Rev BE
February 2018
Rosemount 3150 Series
Calibration
32
Figure 3-6 – Suppressed Zero
Calibration Example
Figure 3-6a – Example for Suppressed Zero
Calibration (English Units)
Range 2 with Zero Suppression for a calibration of
20 to 120 inH
2
O (100 inH
2
O span)
1. Calibrate the transmitter to 0 to 100 inH
2
O as
described in the Zero Based Calibration Procedure.
2. Consult Figure 3-8b to help determine typical coarse
zero select jumper position. If necessary, reposition
jumper using the Coarse Zero Select Jumper
Position Selection Procedure.
For this example:
% Zero Offset = (20 inH
2
O /250 inH
2
O)*100 = 8%
Position the jumper to the NOMINAL position.
3. Apply 20 inH
2
O to the high side process connection,
and adjust the zero until the transmitter output reads 4
mA. DO NOT USE THE SPAN ADJUSTMENT.
4. Apply 120 inH
2
O to the high side process connection.
Verify the output reads 20 mA. If necessary, adjust
the span. Recheck the zero after any span
adjustment.
Figure 3-6b – Example for Suppressed Zero
Calibration (SI Units)
Range 2 with Zero Suppression for a calibration of
5,0 to 29,9 kPa (24,9 kPa span)
1. Calibrate the transmitter to 0 to 24,9 kPa as described
in the Zero Based Calibration Procedure.
2. Consult Figure 3-8b to help determine typical coarse
zero select jumper position. If necessary, reposition
jumper using the Coarse Zero Select Jumper
Position Selection Procedure.
For this example:
% Zero Offset = (5,0 kPa /62,2 kPa)*100 = 8%
Position the jumper to the NOMINAL position.
3. Apply 5,0 kPa to the high side process connection,
and adjust the zero until the transmitter output reads 4
mA. DO NOT USE THE SPAN ADJUSTMENT.
4. Apply 29,9 kPa to the high side process connection.
Verify the output reads 20 mA. If necessary, adjust
the span. Recheck the zero after any span
adjustment.