Emerson Rosemount OCX8800 Quick Start Manual page 14

Quick Start Guide
equipped on your transmitter. Refer to the following sections and
select the option that applies to your transmitter configuration.
2.4.1 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.
Procedure
1. Refer to
filter and pressure gauge) to the instrument air inlet on the
electronics housing and to the inlet side of the dilution air flow
meter.
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.
Failure to use proper gases will result in erroneous readings.
4. Use one CO gas and two O
•
•
•
5. 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.
14
Figure 2-3. Connect the reference air set (regulator/
CAUTION
Do not use 100 percent nitrogen as an O
Emerson recommends using O
percent and 2.0 percent O
Do not use gases with hydrocarbon concentrations of more
than 40 parts per million.
CO: 1000 ppm or up to 4 percent, balance air
O low gas: 0.4 percent , balance N
2
O high gas: 8 percent, balance N
2
low gas between 0.4
2
.
2
gases to calibrate the transmitter.
2
2
2
July 2023
low gas.
2
Rosemount OCX8800