Emerson ROSEMOUNT OCX 8800 - Manual (Page 39)

Instruction Manual
IM-106-880, Rev 1.0
January 2007
2-19
OCX 8800
Figure 2-11. Piping Arrangement,
Blowback without Autocalibration
37390005
Check Valve
Blowback Valve,
Air Operated
*Normally
Closed
Solenoid
Valve
*NOTE: During blowback operation, states of
both solenoid valves change.
Electronics
Housing
Eductor Air In
Sensor
Housing
Dilution Air In
Reference Air In
CAL Gas In
Cal Gas Flow Meter
7 scfh, 20-30 psig
Recommended
Dilution
Air Flow Meter
0.1 scfh
Instrument
Air Supply
Pressure Regulator/Filter
35 psig - General Purpose
45 psig - Hazardous Area
(
2-Stage
Regulators
CO HI O
2
LO O
2
Instrument Air
Pressure
Regulator/Filter
55 psig
*Normally
Open
Solenoid
Valve
Pressure regulator with 1/8” inlet port is factory
set for 35 or 45 psig. Regulator with 1/4” inlet port
is factory set for 55 psig. If regulators are not
installed in correct locations, the OCX 8800 will
not work.
(
NOTE: Wall mount the air-operated blowback
valve on a suitable mounting plate.
CAUTION