Allow at least 6 inches (150 mm) of clearance below the sensor for easy cartridge replacement. Electrical Wiring and Connections
The XNX supports three main sensor technologies, each requiring a dedicated personality board:
The LCD will light up and initiate a self-test routine. The display will show the current firmware version, the configured gas type, and the target full-scale range.
XNX Universal Transmitter Quick Start Guide: Installation & Configuration Xnx Universal Transmitter Quick Start Guide
If ambient air is completely free of contaminants, you may use it as your zero reference. Otherwise, apply 100% Nitrogen synthetic zero air to the sensor via the calibration cup. Wait for the on-screen gas reading to stabilize.
Calibration gas cylinder with a known concentration of target gas.
Upon successful entry, you will gain access to the three core menus: Allow at least 6 inches (150 mm) of
Adjust the displayed span value using the arrows to match the exact concentration printed on your calibration gas cylinder.
Upon first startup or sensor replacement, the transmitter must be configured for the attached sensor cartridge. Enter the passcode (Default is usually 0000 ). Navigate to > Sensor Type .
To ensure accurate readings, perform a zero and span calibration during commissioning. Let the sensor stabilize for at least 30 minutes after power-up before starting this procedure. XNX Universal Transmitter Quick Start Guide: Installation &
Never open the enclosure while the unit is energized in a hazardous location.
The large, backlit LCD provides:
The transmitter uses interchangeable personality modules attached to the back of the display: For toxic gases and oxygen. Catalytic Bead (mV): For flammable gases.
Follow the wiring diagram for your specific output (4-20mA, HART, or optional Modbus/Fieldbus).