Figure 2-11: Pneumatic installation, Rosemount OCX8800 with reference air
set without autocalibration
A. Sensor housing
B. Eductor air in
C. Electronics housing
D. Calibration gas in
E. Reference air in
F. Dilution air in
G. Dilution air flow meter 0.1 scfh
H. Instrument air out
I. Calibration gas flow meter (7 scfh, 20 to 30 psig [1.4 to 2.1 barg] recommended)
J. Two-stage regulators
K. Instrument air supply
L. Pressure regulator/filter
General purpose: 35 psig (2.4 barg)
M. 2-in. pressure gauge, 0 to 60 psig (0 to 4.1 barg)
N. Combination filter-regulator, 0 to 60 psig (0 to 4.1 barg)
O. Flow meter, 1-10 scfh
P. Flow meter, 0.05-0.5 scfh
Manual Install
00809-0500-4880 December 2022
Rosemount OCX8800A 45
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