6 CALIBRATION AND TESTING
6.1 Introduction
It is necessary to test this product at least every twelve months to ensure that the sensors and
alarms are operational. Periodic testing may be performed simply by using exhaled breath to
generate high CO2and low oxygen alarms on units with an oxygen sensor fitted. Exhaled breath
contains approximately 4% CO2and 16% oxygen, and therefore contains sufficient levels of each
gas to cause alarms on the CellarSafe monitor.
To test the alarms, blow into a plastic bag and hold the open end of the inflated bag tightly over
the sensor(s) until the alarms activate. The CellarSafe display will show increased levels of CO2
and decreased levels of oxygen (on units with an oxygen sensor fitted), and the alarms should
activate after approximately 10-15 seconds for oxygen and 25 seconds for CO2.
Alternatively, Crowcon can provide a calibration unit and calibration gas for checking and
calibrating the sensors. The following sections describe the calibration procedure.
Issue 5
6.2 Calibration
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