Crowcon CellarSafe, Installation And Operating Instructions Manual

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 CO

2

and low oxygen alarms on units with an oxygen sensor fitted. Exhaled breath 

contains approximately 4% CO

2

and 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 CO

2

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 CO

2

.

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

7