Reference Air Set And Solenoids Option Without Coe Zero Function - Emerson Rosemount OCX 8800 Reference Manual

Install
3.
4.
5.
2.4.2 Reference air set and solenoids option without COe zero
function
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.
34
Install an air line between the instrument air outlet fitting on the electronics housing
and the tee fitting on the sensor housing.
CAUTION!
FAULTY READINGS
Do not use 100% nitrogen as an O
0.4% and 2.0% O . Do not use gases with hydrocarbon concentrations of more than 40
2
parts per million. Failure to use proper gases will result in erroneous readings.
Use one CO gas and two O
• CO - 1000 ppm or up to 4%, balance air
• O low gas - 0.4%, balance N
2
• O high gas - 8%, balance N
2
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.
low gas. It is suggested that O
2
gases to calibrate the OCX 8800.
2
2
2
low gas be between
2
OCX 8800