The Fireye NXCES02 oxygen probe is designed to be used with the NXF/PPC4000 and provides continuous oxygen concentration readings allowing the NXF/PPC4000 to trim the air or fuel servo to obtain optimum combustion efficiency. The NXCESO2 offers fast, accurate response and excellent reliability when mounted in accordance with the guidelines shown.
Along with the oxygen (O2) concentration, the NXCESO2 provides the stack temperature utilizing a type K thermocouple up to 800°F (426°C). On board electronics measure the ambient temperature and control an integrated cooling fan that is used to maintain the internal temperature between 45°C and 70°C (113°F to 158°F).
The wide band lambda sensor LSU is a planar ZrO2 (zirconium dioxide) dual cell limiting current sensor with an integrated heater and pump control. The wide band oxygen sensor responds to changes in the air/fuel mixture in less than 100 milliseconds. The oxygen sensor cartridge is designed to allow for easy replacement without the need to remove the probe from the stack, minimizing down time.
The NXCESO2 requires 2 power leads (24 vdc) and a twisted shielded pair for modbus-RTU communications. Fireye cable part number 59-565 is suitable for all installations. When connected to the NXF/PPC4000, the NXF/PPC4000 automatically detects the NXCESO2 through the modbus-RTU communications. The USER INFO screen on the NXF/PPC4000 will display the current O2 level, stack temperature and NXCESO2 status register. To be used as a trim system the NXCESO2 must be commissioned with the NXF/PPC4000. The NXCESO2 can be added to a previously commissioned system without the need for re-commissioning the servos. That is, the previously commissioned profile setpoints remain valid. Refer to bulletin PPC-4001 for connection, setup, commissioning and operation information.
The NXCESO2 is available to be used independently. All data pertaining to oxygen concentration, stack temperature, ambient temperature and operational status is available through modbus-RTU communications. Local codes having jurisdiction and authority over the use of such instruments should be consulted.
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