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1.CO2 FAQ

1.1Ventilation Rate

CO2 Monitor can "measure" Ventilation Rate!
How?
One person in a room, exhale out 18.5cc CO2 , per breath  
Breath Frequency = 16[breath/min]
Then  One person in a room, exhale out 300cc CO2 , per minutes 

  Outside Air is 400PPM=CntO
Then this room will equilibrium at CntI [ppm], CntI=?

The equation is
Generation of CO2 = Moved Out CO2
300[cc/min/person] =(CntI-CntO)VentRate
So, we can solve VentRate=300/(CntI-CntO),  Bingo
That why CO2 monitor can "measure" VentRate, 

What is L/s/p  or lps?
It’s liter per sec per person.
If the CO2 monitor show 22.3 lps, and
there is one person in the room,  the real VentRate=22.3 [liter per sec]
there is two person in the room,  the real VentRate=22.3x2 [liter per sec

Below is an Excel File, which solve VentRate.

Breath Volume=

500

[cc]

..air in lung

350

[cc]

..not in lung

150

[cc]

..CO2 in one breath

3.7%

in volume

..CO2

18.5

[cc]

Breath Freq=

16

[breath/min]

Breath Volume/min

8000

[cc/min]

Breath CO2 Vol/min

296

[cc/min]

Breath CO2 Vol/min

300

[cc/min]  by ASHRE

Breath CO2 Vol/min

0.0106

cfm  0.0106cfm

if CntI=

690

[ppm]

VentRate=

977

[L/min/p]

VentRate=

16

[L/s/p]

VentRate=

36

[cf/min/p]

ZG106 Calibration Methods:
Use standard CO2 in the bottle
 
pump the standard CO2 gas(0-1000ppm, flux = 0.1-0.2 liter/min) into the ZG106 from the Gas Entry Hole (top left corner ) waiting about 2-3min.
 
Calibrate the device using the process below
Use CO2 in office/building
 
Use two Meters (One is the device for calibration. The other one is a calibrated (new) one.
 
Use ambient room gas for calibration in office, waiting at least 10min ,until the CO2 reading doesn’t change
 
( notice: user must not breathe toward the ZG106, CO2 from the user will affect the reading of ZG)
 
Use the reading of the new device as the standard
 
Calibrate the device using the process below
Use CO2 outsides
 
Use ambient room gas for calibration outsides,waiting at least 10min ,until the CO2 reading doesn’t change
 
  ( notice: user must not breathe toward the ZG106, CO2 from the user will affect the reading of ZG)
 
Use 380-420ppm as the standard reading.
 
Calibrate the device using the process below

 

 
Copyright (c) 2006-2007 RADIANT INNOVATION INC. All Rights Reserved.

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