Co2meter CM-0155 User Manual - Page 9
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Powering the Unit
These meters have a switch on the front dedicated to enabling/disabling data logging (right on Figure
above) and another dedicated to powering the unit (left on Figure above). As long as the unit is
connected to an appropriate power source and the power switch is in its ON position, the unit will be
operating properly.
LCD Display (if applicable)
The Liquid Crystal Display (LCD) screen shows the following features:
CO2 in parts‐per‐million (ppm) for 1% and 5% models
CO2 in percentage format (##.##%) for 30%, 65%, 100%
Logging On/Off
Percentage of memory free
Usage (Pump only)
In order to use the unit, hoses/tubing must be attached to the inlet and outlet fittings on the front of the
unit. The pump will draw air from the inlet in a vacuum configuration, push it through the sensing
chamber, and exhaust the air out through the outlet.
Closed Loop Operation
Open Loop with Environmental Exhaust
Figure 5: Closed loop sampling setup
Figure 6: Opened loop sampling setup
CO2Meter
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