Life and Health - XCell H2S and CO Sensors with TruCal Only

The Life and Health information reports the general health of the sensor. XCell sensors with TruCal (Hydrogen Sulfide and Carbon Monoxide) calculate current sensor sensitivity using automated pulse checks. The pulse stimulates the sensor with a response similar to having actual calibration gas applied. The stimulated response is compared to the last calibration and will make adjustments to sensitivity to match the last calibration. When the required adjustment is greater than the accuracy of the algorithm’s adjustment, the sensor will call for a calibration.

All digital sensors, including catalytic bead and oxygen, will show life health status as 'Good' or 'Fair' with the following calculation: Good condition occurs when the current calibrated span sensitivity is greater than 50% of the way between the initial calibration sensitivity and the end-of-life span sensitivity. Fair condition occurs when the current calibrated span sensitivity is less than 50% of the way from the initial calibration sensitivity and the end of life span sensitivity.