CPU can also initiate and perform calibrations. Three test gases and instrument air can be
turned on and off by solenoids. Test gas flow to the sensors is regulated by a flow meter
between the electronics and sensor housings. Instrument air is separated into eductor air,
reference air, and dilution air. The instrument air solenoid does not allow air flow until the
heaters are up to temperature. This minimizes the amount of sampled process flue gas
being pulled into the cold sensors causing condensation.
System operation diagramFigure 1-2:
1.2.6 Handling the OCX 8800
CAUTION!
EQUIPMENT DAMAGE
Only handle printed circuit boards and integrated circuits when adequate anti-static
precautions have been taken to prevent possible equipment damage.
The OCX 8800 is designed for industrial application. Treat each component of the system with
care to avoid physical damage. The probe may contain components made from ceramics,
which are susceptible to shock when mishandled.
1.2.7
System considerations
Prior to installing your OCX 8800, make sure you have all the components necessary to
make the system installation. Ensure that all components are properly integrated to make
the system functional.
After verifying that you have all the components, select mounting locations and determine
how each component will be placed in terms of available line voltage, ambient
temperatures, environmental considerations, convenience and serviceability. Figure 1-4
shows a typical system wiring for a system with integral electronics. Figure 1-5 shows
Description and specifications
6 OCX 8800
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