![background image](http://html.mh-extra.com/html/aeroqual/aqm60/aqm60_user-manual_2862855035.webp)
Page | 35
Aeroqual AQM60 User Guide
4.5. AirCal 8000 (Optional)
The AirCal 8000 is an integrated calibration system for the AQM60. It consists of three main components:
1.
Housing:
Gas cylinder housing with regulators
2.
Gas Dilution Module:
2 span gas inputs with a zero air mass flow meter (MFM) 0-3 SLPM
and a mass flow controller (MFC) 0-0.05 SLPM.
3.
Zero Air Source:
Scrubbing media activated carbon, Purafil chemisorbant and heated
carulite
4.5.1. Overview
The AirCal system delivers a controlled concentration of calibration gas for calibration of ambient gas
instruments. To do this the calibration gas inside the cylinder is mixed with zero air, which is generated by
the scrubbing material inside the AirCal 8000 module. The calibration gas is therefore diluted by the zero air
to provide a given concentration which is directed into the AQM60. The concentration of calibration gas is
calculated using a dilution ratio which is determined by the zero air and cylinder gas flow rates.
The zero air generator will deliver a flow rate of approximately 2
– 2.5 LPM. The flow rate of the zero
air is monitored using a mass flow meter (MFM).
The flow rate of the cylinder gas is controlled dynamically using a mass flow controller (MFC). The
cylinder gas flow rate can range from between 0.005
– 0.045 LPM. The MFC will adjust the flow of
the calibration gas so as to maintain a user defined dilution ratio according the equation:
The user dilution ratio needs to be calculated in order to deliver the required concentration of calibration gas.
Calibration gas
Exhaust
USB cable
Nafion
Humidifier
(R21)
Zero Air
Generator
Calibrator
Analyser
Summary of Contents for AQM60
Page 1: ...Aeroqual AQM60 User Guide ...