Technical Manual

XNX Universal Transmitter
Section 3 - Calibration
95
z
Figure 205. Gas Calibration menu
2. Perform a zero calibration. When concentration values are
stable, select
✓
✓for XNX to calculate the zero adjustment
Sensor Reading
at Current Settings
Figure 206. Apply Zero Gas screen
3. Select ✓
✖
to return to the Gas Calibration menu. If the zero
calibration was successful, the transmitter will display the
Zero Passed screen
Figure 207. Zero Calibration screens
4. Begin the span calibration by entering the concentration
value of the calibration gas: Select
✓
✓ to choose the rst
digit. Use +/- to increment/decrement values. Select
✓
✓ to
accept the value and move to the next digit. Use calibration
cover P/N 2108B0272 to perform span calibration at a ow
regulator of 1 LPM. (If a span calibration is not required,
select
✖
to return to the calibration menu.)
Figure 208. Searchpoint Optima Plus
5. Continue until all three digits have been entered.
Figure 209. Span Concentration screen
6. Apply the span gas. When concentration values are stable,
select
✓
✓ to calculate the span adjustment. This process
also determines if the sensor is within range to accurately
detect the target gas.