Rosemount 3152 - Zero

Reference Manual
00809-0100-4835 Rev BD
July 2016
Rosemount 3150 Series
3-8
Figure 3-5a – Example for Elevated
Zero Calibration (English Units)
Range 2 with Zero Elevation for a calibration of –120 to –20
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 Table 3-1 to determine appropriate Course Zero Select
Jumper position. If necessary, reposition jumper using the Coarse
Zero Select Jumper Position Selection Procedure.
For this example:
% Zero Offset = (-120 inH
2
O /250 inH
2
O)*100 = -48%
Position the jumper to the MID ZE position.
3. Apply -120 inH
2
O to the high side process connection (as marked on
the transmitter sensor module) and adjust the zero until the
transmitter output reads 4mA. Do not use the span adjustment.
NOTE
Applying 120 inH
2
O to the low side process connection (as
marked on the transmitter module) will give the same result
4. Apply -20 inH
2
O to the high side process connection (as marked on
the transmitter sensor module). Verify the output reads 20mA. If
necessary, adjust the span. Recheck the zero after any span
adjustment.
NOTE
Applying 20 inH
2
O to the low side process connection (as marked
on the transmitter module) will give the same result.
Figure 3-5b – Example for Elevated
Zero Calibration (SI Units)
Range 2 with Zero Elevation for a calibration of –29,9 to –5,0 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 Table 3-1 to determine appropriate Course Zero Select
Jumper position. If necessary, reposition jumper using the Coarse
Zero Select Jumper Position Selection Procedure.
For this example:
% Zero Offset = (-29,9 kPa /62,2 kPa)*100 = -48%
Position the jumper to the MID ZE position.
3. Apply -29,9 kPa to the high side process connection (as marked on
the transmitter sensor module) and adjust the zero until the
transmitter output reads 4mA. Do not use the span adjustment.
NOTE
Applying 29,9 kPa to the low side process connection (as marked
on the transmitter module) will give the same result.
4.
Apply -5,0 kPa to the high side process connection (as marked on
the transmitter sensor module). Verify the output reads 20 mA. If
necessary, adjust the span. Recheck the zero after any span
adjustment.
NOTE
Applying 5,0 kPa to the low side process connection (as marked
on the transmitter module) will give the same result.