HiVol 3000 User manual 1.7 Introduction
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Figure 3 Flow Path Schematic
1.5.4 Flow Sensor
The flow sensor is a precision mass flow sensor - which “reads” the
flow-rate and converts it to an electronic signal. This is connected to the
electronics enclosure, from where the flow sensor signal performs two
functions. One is to indicate the current flow-rate of air, via the LCD
display, and the other is to provide feed-back to the flow control circuit.
The HiVol Model 3000 uses a mass flow sensor located within a parallel
by-pass tubing. An orifice is used to control the amount of flow through
the by-pass and then the mass flow sensor is used to calculate the total
flow in the instrument The device has been designed to be easily
removed and replaced and must be serviced by Ecotech.
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