XNX Universal Transmitter - Merkantile

XNX Universal Transmitter4.2 XNX EC Sensor Cartridge ReplacementCautionFor toxic sensors, remove the shorting clip from the bottom of thesensor prior to installation. For O 2sensor, there is no shorting clipprovided.The serviceable sensor allows replacement of the cell inside thesensor. The sensor cell can be replaced with cell of the same type orchanged to detect a different target gas, Both procedures are listedbelow.NoteWhen replacing Oxygen (O 2) sensor cells, the initial warm-uptime is between 10 and 15 minutes. This warm-up is requiredonly after sensor cell replacement.4.2.1 Replacing with the Same Cartridge TypeTo replace the cell follow the procedure below.1. Unscrew the weatherproof cover, loosen the sensor retainerlocking screw and unscrew the sensor retainer.2. Remove the old sensor by pulling without twisting.3. Unscrew the sensor cap.4. Remove the old cell by pulling without twisting.5. Ensure the new cell is the same type as the old cell.6. Plug the new cell into the sensor, taking care to align the sensorpins with the connector holes in the PCB.7. Refit the sensor retainer, tighten the locking screw and refit theweatherproof cover.8. Sensor warm-up will begin and the XNX display will alternatebetween two screens Fault 151 and “WARM”.Section 4 - Maintenance 4-39. Follow the procedure to accept the new sensor in Accept NewSensor Type.10. Re-Calibrate the detector following the procedures in Section 3.2.1TransmitterOld Sensor321Sensor Retainer &Locking ScrewEC Sensor RemovalNew Sensor456New cellFigure 4-2. XNX EC Sensor Cell ReplacementOld cellSensor CapSensor Cell Replacement4.2 XNX EC Sensor Cartridge Replacement