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Instruction Manual
IM-106-880, Rev 1.0
January 2007
OCX 8800
2-16
Figure 2-9. Pneumatic
Installation, OCX with Reference
Air Set and Solenoids (with
Autocalibration)
Reference Air Set and Solenoids Option
When the reference air set and test gas solenoids are included with your
OCX 8800, use the following procedure to install the pneumatic system
components.
1. Install the reference air set according to the instructions in Reference Air
Set Option, steps 1 through 3.
2. Refer to Figure 2-9. Connect the O
2
low gas source to the CAL GAS LO
O
2
inlet fitting on the electronics housing. Install a shutoff valve and
pressure regulator with gage in the O
2
low supply line, as shown.
3. Connect the O
2
high gas source to the CAL GAS HI O2 inlet fitting.
Install a shutoff valve and pressure regulator with gage in the O
2
high
supply line.
Electronics
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
CAL Gas Out
Eductor
Air In
Sensor
Housing
Instrument Air Out
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