PROGRAMMING THE AREARAE
4-12
Cross-Sensitivity
Some sensors may show cross-sensitivity to other gases.
Therefore, it is important to choose the gas mixture carefully for
the Multiple Sensor Calibration to avoid erroneous readings.
For example, some VOC gases are known to cause erroneous
readings by the CO sensor. In general, it is recommended to
calibrate the two toxic sensors, combustible and oxygen sensor
with a bottle of mixed gas using the Multiple Sensor Calibration
procedure and to calibrate the PID with a bottle of a single
VOC gas. Use the Single Sensor Calibration procedure for the
oxygen sensor 0% O
2
(100% N
2
) calibration, if needed.
