Fuji Electric FWD User Manual

Ultrasonic Flowmeter for Air

Type: FWD

Ideal for proper management for compressor etc…!

Abundant applicable pipe diameters

Applicable pipe diameter 25mm up to 200mm.

No energy loss due to no pressure loss

Measurement principle is ultrasonic method. There is no pressure loss without protrusion in the pipe.

No need of filter such as mist separator thanks to FWD has high resistance to oil mist

Accurate flow rate measurement including oil mist. Strong durable and reliable to use.

No need of power source installation work by means of battery driven

Lithium-battery build-in type (approx. 10 years operating) is provided without painful wiring work of the power.

Flow rate conversion available

Conversion from an actual flow rate to a flow rate at normal conditions (0°C, 1 atm) or user-defined conditions.

Capable of forward/reverse measurement and output

Nominal diameter

25 and 32mm

Nominal diameter 40 to 80mm

Nominal diameter 100 to 200mm

21A1-E-0019a

Airﬂow rate measurement supported by ultrasonic method!

"Visualization" is supported meeting customer's demands.

Nominal diameter 25 and 32mm

(screwed type)

Nominal diameter 40, 50, 65 and 80mm

wafer connection type)

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Features

No energy loss due to no pressure loss.

Ultrasonic method is adopted as a measurement principle.

There is no pressure loss due to no protrusion in a pipe.

High durability thanks to it has strong resistance to oil and mist.

Strong structure to oil ,mist and ﬂuid containing dust due to no moving parts.

Capable of using even with old pipe and refueling type compressor.

Note) In case of a large amount of oil and mist contained, a vertical piping is

recommended to use.

Capable of forward/reverse measurement and output.

Capable of forward/reverse measurement and output according to

measurement setting. Comprehending an using air rate where ﬂows between factories, also

applicable to loop pipe.

Abundant output functions enables a system management/control.

Not only unit pulse but also 4 to 20mA DC analog output and upper /lower

alarm output are provided.

Note) When 4 to 20mA DC analog output is selected, instantaneous ﬂow rate,

pressure and temperature can be switched in the ﬁeld.

Capable of detecting the air leakage.

Nominal diameter 100,150, and 200mm

(ﬂange connection type)

No need of power source installation work by means of battery driven.

Build-in battery type (10 years operating) is also provided which

eliminates painful power source installation work.

Note) Battery driven type is to indicate only.

1: 60 Wide range ability

Having wide range ability enables little amount of ﬂow rate to be

measured accurately. Furthermore, it realize that wide rage with 1:400 from sensitive ﬂow rate (beginning of the measuring ﬂow rate) to maximum ﬂow rate.

Easy to read display

LCD digital display with large size of characters allows to read easily and

capable of reading an accumulated ﬂow rate and instantaneous ﬂow rate simultaneously. Additionally, indication part can be rotated in 90 degrees in the ﬁeld.

Display

Measurement error indicator

Flow rate type Select among

Normal/Standard/ Blank (actual flow rate)

Blinker tells you that flow is

detected

Flowmeter life indicator (for battery-powered type only)

Communication error indicator

Gas type (Air or N2)

Main display: Accumulated flow rate

Sub display: Instantaneous flow rate

Principle

Excellent repeatability "Transit Time" Method.

Two ultrasonic sensors are installed on the side of ﬂow entrance and exit for ﬂow meter. When liquid ﬂows in the direction of the arrow as shown on the diagram, difference of transit time by ﬂow velocity occurs between sound waves generated from ﬂow entrance and exit. This time lag is using for detecting the ﬂow velocity of the ﬂuid and calculating the volumetric ﬂow according to cross-section area of the ﬂow meter and ﬂow velocity. Furthermore, capable of converting a ﬂow rate into the one at normal or standard conditions by means of built-in pressure sensor.

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