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Chapter 1. INTRODUCTION
Introduction
The CMG Gas Flow Monitor is a flowmeter for measuring the
fuel flow rate of gas burners. It uses the Micro Flow sensor chip, a
thermal mass flow sensor made using Azbil Corporation proprietary
technology.
The CMG measures and displays the instantaneous and integrated
flow rate in normal standard state
*
without the need for temperature
and pressure conversion.
Other functions include alarm contact output, analog output of
instantaneous flow rate, and open collector output of totalizer pulse or
event output.
These functions enable fine-grained air-fuel ratio management
of individual burners and flow rate management of combustion
equipment.
*
Factory setting is 0°C, 101.325kPa (1 atmosphere). (The reference
temperature can be selected from 5°C, 10°C, 15°C, 20°C and 25°C
according to the function settings.)
Features
• Installation of the compact and high-precision CMG is simple. It can
be mounted in any direction, as the direction of the display can be
changed.
• Gas flow rate can be measured and managed easily on the digital
flow rate display and Hi, Lo, OVER and ALARM LED displays.
• Output of the gas flow rate upper/lower limit settings and analog
output of instantaneous flow rate are convenient for panel display or
flow rate management purposes.
• Fuel usage can be easily understood because the instantaneous flow
rate and integrated flow rate displays can be switched by one-touch
operation.
The total flow rate since this device was installed can be displayed.
• Compensation of display values is not needed even if temperature
and pressure change as the measurement method used is mass flow.
• A bypass structure using an orifice enables low pressure loss, and
prevents the influence of mist, etc.
• Self-diagnostic functions simplify remedies during troubleshooting.
