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Chapter 3: Operation
The information in this chapter assumes that NomoLine ISA CO2 is set up and ready for use.
This chapter provides necessary information for proper operation of the device. Do not
operate NomoLine ISA CO2 without completely reading and understanding these nstructions.
LEGI Indicator
The Light Emitting Gas Inlet (LEGI) Indicator provides visual indications of capnography
status. The LEGI Indicator (3) is located around the capnography connector on the front of
the device.
The LEGI indicator illuminates in different colors depending on the state of the device as
described in the table:
LEGI Indicator Status
Steady green light Capnography monitoring in operation and OK
Blinking green light Zeroing in progress. See Zeroing on page 30.
Steady red light Sensor error
Blinking red light Check the sampling line (possible occlusion)
Note: Without a NomoLine sampling line connected, the LEGI Indicator does not illuminate.
With no sampling line connected, NomoLine ISA CO2 stays in a low-power, sleep mode. Once
a sampling line is connected, NomoLine ISA CO2 switches to measuring mode and starts
delivering gas data.
Capnography Display
Parameters and measurements display on the screen of the host device that NomoLine ISA
CO2 is connected to. Refer to the host device operator's manual or user's guide for complete
information on displayed parameters, settings, alarms and messages.