OCX 8800
Instruction Manual
PNEUMATIC INSTALLATION
Pneumatic system connections depend on whether reference air set, calibration solenoids, and/or blowback equipment options are equipped on your transmitter. Refer to the following paragraphs and select the option that applies to your transmitter configuration.
Reference Air Set Option (only)
When no options or only the reference air set option is equipped, use the following procedure to install the pneumatic system components.
1.Refer to Figure
2.Connect the dilution air flow meter output to the dilution air inlet fitting on the sensor housing.
3.Install an air line between the instrument air outlet fitting on the electronics housing and the tee fitting on the sensor housing.
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Do not use 100% nitrogen as an O2 low gas. It is suggested that O2 low gas be between 0.4% and 2.0% O2. Do not use gases with hydrocarbon concentrations of more than 40 parts per million. Failure to use proper gases will result in erroneous readings.
4.One CO gas and two O2 gases are used to calibrate the OCX 8800:
CO - 1000 ppm or 4% O2 low gas - 0.4% O2 high gas - 8%
Connect the output of the test gas sources to the inlet port of the CAL GAS flow meter. Install an air line between the flow meter outlet port and the CAL GAS inlet fitting on the sensor housing.
