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52/148 REF C04717-02-91 Q-NRG User Manual, Edition 4.2
Chapter 3 - Q-NRG Operation COSMED srl
To calibrate Gas Analyzer (Cylinder)
1. Make sure the device has been warmed up according to “Device Warm-Up”.
2. Connect the output of the calibration cylinder as shown below.
3. Adjust gas output pressure to 5-6 bar (70-90psi).
4. Start the calibration procedure following the on-screen instructions. Calibration is automatic and does not
require any interaction.
Gas Analyzers (Room Air)
This procedure consists of a 1-point calibration using room air:
• CO2 analyzer Zero will be performed using room air, after ambient CO2 is removed by the internal scrubber.
• O2 sensor output will be adjusted using room air to cover maximal expected FiO2 range (22% or 75%), and
compensate for sensor aging.
•
Correction factors necessary to match actual reading of O2 and CO2 with expected values (room air) will be
calculated.
Note:
This calibration procedure is a subset of the Gas Analyzers (Cylinder) calibration and is useful for QC/
troubleshooting purposes only. It is intended for Expert users (see “Intended audience”). Q-NRG+
requires two distinct calibrations for the two different O2 sensor operating ranges: VENTILATOR Mode
(0-75%), CANOPY/MASK Mode (0-22%).
To calibrate Gas Analyzer (Room Air)
1. Make sure the device has been warmed up according to “Device Warm-Up”.
2. Start the calibration procedure following the on-screen instructions. Calibration is automatic and does not
require any interaction.
Blower/Internal Flowmeter – (CANOPY Mode)
The Q-NRG has an internal turbine flowmeter (blower) which is used both for calibrating the single use flowmeter
(pneumotach) and measuring the dilution flow during CANOPY Mode testing.