Fuji Electric FWD Series, FWD025, FWD032, FWD065, FWD080 Instruction Manual

TABLE OF CONTENTS

Preface ............................................................................................................................................... 2

Product Overview ............................................................................................................................. 2

Safety Instructions ........................................................................................................................... 3

1. Introduction ............................................................................................................................... 6

1-1. Scope of supply .............................................................................................................. 6

1-2. Name of each part ........................................................................................................... 6

2. Installation ................................................................................................................................. 7

3. Setting Up ................................................................................................................................ 12

3-1. Measurement and indication setting ........................................................................... 13

3-2. Output setting (for external power supply type) ........................................................ 14

4. Display ..................................................................................................................................... 16

4-1. Button operations ......................................................................................................... 16

4-2. Operation modes .......................................................................................................... 18

4-3. Setting items ................................................................................................................. 21

5. Wiring (External Power Supply Type) .................................................................................... 27

6. Operation ................................................................................................................................. 29

7. Alarm ........................................................................................................................................ 30

7-1. Aberration in flow measurement ................................................................................. 30

7-2. Aberrant pressure value ............................................................................................... 31

7-3. Aberrant temperature value .........................................................................................

7-4. Memory aberration ........................................................................................................ 32

8. Power Interruption (External Power Supply Type) ............................................................... 33

9. Battery Life (Built-In Battery Type) ........................................................................................ 34

10. Troubleshooting ...................................................................................................................... 35

11.  Outline Diagram ...................................................................................................................... 37

Warranty and Maintenance ............................................................................................................ 38

31

1

Preface

Thank you very much for purchasing the Ultrasonic Flow Meter for Air FWD this time. Please be sure
to read this Instruction Manual to use this product correctly and safely and to prevent failures.
Please arrange for operators who actually use this product to know the context of this Instruction
Manual surely. This Instruction Manual is necessary for performing maintenance, too. Please keep
the Manual until this product is disposed of.

Product Overview

This flow meter is the ultrasonic flow meter for air capable of measuring the flow of air at pressure
from the atmospheric pressure to less than 1 MPa. The flow meter is installed to pipes by screwing its
taper pipe threads to the pipes or by being tightened between pipe flanges.

 Screw connection type (Taper pipe threads): FWD025, FWD032
 Wafer connection type (Installation between pipe flanges and by tightening with bolts):

FWD040, FWD050, FWD065, FWD080

 Flange connection type (JIS 10K flange): FWD100, FWD150, FWD200

2

Safety Instructions

To ensure the safe use of this flow meter and to prevent a failure or an unexpected situation,
instructions to which attention must be paid are indicated with the following symbols.

Definitions

Danger

Warning

Note

General

Danger

Working environment and applicable fluid

Note

Incorrect handling by failure to follow instructions with this sign may lead to
imminent danger of death or serious injury.

Incorrect handling by failure to follow instructions with this sign may lead to death
or serious injury.

Incorrect handling by failure to follow instructions with this sign may lead to injury,
properties loss (product damage, etc.), pecuniary loss, and/or punishment
according to a penal regulation for violation of laws and ordinances.

This symbol indicates that improper operation may results in an accident.
This symbol indicates prohibited acts.
This symbol indicates matters you should observe without fail.

Do not use for applications that require safety, such as nuclear, railroad, aircraft,

vehicle, playground equipment, etc.

Do not modify the product.

Do not use the product for foods, drinks, medical chemicals, etc., because it is

not of sanitary specifications.

Do not use the product in the atmosphere of an inflammable gas, etc., because it

is not of explosion-proof specifications.

Do not apply any fluid other than air (compressed air used in factories) to this

flow meter. (The meter can be applied for nitrogen by factory setting before
shipment from our factory.)

Observe the temperature and humidity ranges (-10 to +60C and 90%RH or

lower) and pressure range (the atmospheric pressure to less than 1 MPa) in
use.

Avoid usage in an ambient containing a corrosive gas (chlorine, hydrogen

sulfide, etc.) and/or for an application to a fluid containing a corrosive gas.

This flow meter is not of a perfect waterproof structure (IP64). Do not install it at

a place that may be submerged in water.

Install the flow meter as far away from an electric noise source as possible. If it is

installed near the electric noise source, ground the shield of the external
connection cable.

 The installation of a sunshade is recommended if the flow meter is exposed to

direct sunlight.

3

Operation

Note

Storage

Note

Piping

Warning

Note

 This flow meter is not a specified measuring instrument defined in Japanese

measurement law. The product cannot be used for billing transactions or
certification.

When opening a valve to start fluid flow, open the valve not all at once but

gradually. Opening of the valve all at once may cause a failure of the flow meter
if a pressure difference is occurring between the upstream side and
downstream side of the valve.

Store the flow meter at a place away from fire and not exposed to direct

sunlight.

Do not place any combustible material, inflammable substance and heating

body in the periphery of the flow meter.

Store this flow meter at a place which ambient temperature is -20 to +70C and

where no dew condensation occurs.

Do not ride on this flow meter using it as a foothold.

Do not hold the display section of this flow meter.

 In the case that a flow-regulating valve, etc., that may cause turbulence of the

flow is installed, its location must be on the downstream side of the flow
meter.

 In the case of new piping, install the product after sufficient cleaning of the

pipe(s).

 Vertical piping is recommended when mist, dust, etc. are contained in a large

amount. In horizontal piping, install the flow meter in such a way that the
display section faces upward.

 Do not install the product in locations where strong compressive force, tensile

force, or load may be applied after its installation.

 Arrange piping so that the flow direction conforms to the direction of arrow

indicated on the flow meter’s body.

 Do not drop it or do not make it bumped. Do not apply excessive impact,

either.

 When rotating the display section, do not apply a force in a direction other

than the rotating direction.

Keep hands off the ultrasonic sensors.

4

Wiring

Danger

Note

Disassembling and inspection

Note

Disposal

Warning

When performing wiring work, follow the instructions in this Manual.

Use the product within the rating.

Do not use the product on a voltage exceeding permissible load.

 Do not place the product’s external connection cable together with or near to

power supply line(s) or power line(s), etc.

 Electrical isolation of a remote counter (a receiver) from others is

recommended.

 Do not apply an excessive tensile force to the external connection cable.

 Ensure that the cable tip is not soaked in water during wiring work, etc.

When connecting the power supply wire of the external connection cable to an

external power supply, be careful not to short-circuit it. Use an external power
supply having a short-circuit protecting function.

Be sure to perform the wiring work in a state that power supply from the

external power supply is interrupted.

Do not perform operation and the wiring work with wet hands.

Do not disassemble this flow meter.

 Presence of fluid flow makes a pilot lamp light up in a normal state. In the case

of no indication of the pilot lamp, contact our branch or sales office nearby.

 If mist and dust is contained in a large amount, disconnect the flow meter

periodically to check for the presence of dirt etc., and remove it as necessary.

Be careful not to touch the ultrasonic sensors during inspection.

A lithium ion battery is incorporated in this flow meter. NEVER dispose of this

flow meter through general disposal routes. [Built-in battery type]

NEVER throw this flow meter into a fire. Otherwise, it may catch a fire or

explode. [Built-in battery type]

5

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6

2. Installation

It is recommended that Setting Up (Page12 onward) and changing Panel angle
adjustment: (Page 11) are carried out before installation.

 This flowmeter can be installed both indoors and outdoors and on a horizontal pipe and a

vertical pipe.

 When a large amount of mist and/or dust exists inside pipe, the vertical piping is

recommended. When installing the flow meter horizontally, install it in such a way that the
display section faces upward.

 This flow meter is not of a perfect waterproof structure (IP64). Do not install it at a place where

may be submerged in water.

 The use of a sunshade is recommended if the flow meter is exposed to direct sunlight.
 If you install the flowmeter in the place where it may get wet with rain, install the flowmeter so

that the display section does not face downward.

 When you carry out the piping work, keep hands off inside the body and the ultrasonic

sensors (see Page 6) in particular.

Do not hold the display section of the flow meter.

Flow direction:

 Mate the forward flow direction of a fluid to the arrow of the body.

7

Straight run requirements:

Figure 2-1 Recommended straight pipe run

(D: nominal diameter)

8

When the flow meter is installed near a pressure-reducing valve or a flow adjustment valve,
strictly observe the “required straight run L” as shown in Figure 2-2, because ultrasonic noise may
be generated inside the pipe.

Note that when the flow meter is installed at the downstream of the pressure-reducing
valve etc., there are many constraints. (If conditions are not satisfied, there is a possibility
that flow cannot be measured.)

Required straight run L (mm) =

10D  differentialpressure󰇛kPa󰇜

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1

3. Setting Up

It is recommended that the setting of the flow meter be carried out before installation.

For this flow meter, 20 items shown in Table 3-1can be set. On delivery from factory, the “factory
default settings” in Table 3-1 are arranged, so that the flow meter can be used as it is. Change the
setting as necessary to make them suit to your working conditions.
See “4. Display” about button operations and setting methods.

Table 3-1 Setting items and standard factory settings

Setting item Setting options Factory settings

F1 Indication and output

Analog output

F2

full scale flow-rate

F3 State of contact output

F4 Contact output

F5 Lower limit alarm flow-rate -59999 to 59999 [m3/h] 0 [m3/h]
F6 Upper limit alarm flow-rate -59999 to 59999 [m3/h] 59999 [m3/h]

Alarm judgment value

F7

hysteresis width
Flow-rate moving average

F8

number of times

F9 Output pulse unit

F10 Pulse output method

Flow-value conversion

F11

selection
Standard conversion

F12

temperature

F13 Test mode time selection 3, 60, Unlimited [minutes] 3

F14 Fluid selection

Current output correlation

F15

value

F16 Low flow cutoff flow-rate 0 ≤ Set value ≤ Qmin*2 [m3/h]

Atmospheric pressure of

F17

the working environment
With or without pressure

F18

value averaging
Reset of all of

F00

accumulated values
Reset to standard factory

FFF

*1

delivery settings

Forward flow, forward and reverse
flow

0 to 99999 [m3/h]

Normal open,
Normal close
Reverse flow pulse, upper/lower
limit flow-rate alarm,
error alarm, electronic statement
output

3

0 to 9999 [m

01, 02, 04, 08, 16, 32, 64 [times] 04 [times]

Duty or one shot
50, 100, 125, 250, 500 [ms]

Yes (Normal),
Yes (Standard), No conversion

-10 to 60 [°C] 20 [°C]

Air (25A–200A)
Nitrogen (25A–80A)

Instantaneous flow-rate, pressure,
temperature

000.0 to 999.9 [kPa] 101.3

With (10 times), without (1 time) With (10 times)

To be cleared, not to be cleared Not to be cleared

To be reset, not to be reset Not to be reset

/h] 0 [m3/h]

Forward flow

25A:300
32A:600
40A:700
50A:1200
65A:2000
80A:2500
100A: 5000
150A: 10000
200A: 20000

Normal open

Upper/lower limit flow-rate alarm

100 [L]
1000 [L] for 100A and larger

Duty

Yes (Normal)

The kind of gas is set as the kind
specified at the time of order.

Instantaneous flow-rate

25A:0.1
32A:0.2
40A:0.2
50A:0.4
65A:0.6
80A:0.8
100A: 2.6
150A: 5.0
200A: 9.0

12

Notes:

1. After resetting, "F9: Output pulse unit" will be set to 1000 [L], and “F14: Fluid selection” will be
set to Air.

2. Qmin is the following value depending on the nominal diameter.

25A 32A 40A 50A 65A 80A 100A 150A 200A

0.6 1.1 1.3 2.5 4.0 5.0 10.0 24.0 40.0

Setting items include the one related to fluid to be applied, the ones related to measurement and
indication, and the ones related to outputs.

[m3/h]

3-1. Measurement and indication setting

Settingrelatedtomeasurementandindication



Forwardflowor

Forward/reverseflow




Indicationandoutput



F1

Flowrateconversion

orActualflowrate

Flow‐rateconversion

F11

Indication of “Forward flow” or “Forward/reverse flow” [F1]

Indication of a main display is set.
When the “Forward flow” is selected, forward accumulated flow volume (total) or accumulated
flow volume (trip) can selectively be indicated on the main display by button operation.
When the “Forward/reverse flow” is selected, forward accumulated flow volume (total) or reverse
accumulated flow volume (total) can selectively be indicated on the main display by button
operation. When the analog output (4-20 mA) is selected for the flow-rate output, the electric
current value of the zero flow-rate output becomes 12 mA.

Flow-rate conversion

Select one among “actual flow-rate (OFF)”, "normal conversion flow-rate (Normal)", or "standard
conversion flow-rate (Standard)". If you select "normal conversion flow-rate (Normal)" or
"standard conversion flow-rate (Standard)", both indication and output of accumulated flow rate
and instantaneous flow rate are converted into the values under normal conditions or standard
conditions.

13

3-2. Output setting (for external power supply type)

Pulseoutput

(reverseflow)

Alarmoutput

Instantaneous

flow‐rate

Pressure

Temperature

F3

Alarmoutput

F5

Lowerlimitalarm

F6

Upperlimitalarm

F7

Alarmjudgmentvalue

F2

AnalogoutputFSflow‐rate

Unitofoutputpulse

Opendrainoutput2

Currentoutput

Outputsettings

F9

Outputpulseunit

F4

Contactoutput

F15

Currentoutput

It is recommended that the setting of the flow meter be carried out before installation.

Current output [F15]

One of three output forms of instantaneous flow-rate, pressure and temperature can be
selected for the current output to suit your usage.
When the instantaneous flow-rate is selected, electric current corresponding to the setting of
the maximum flow-rate value of the analog output is outputted.
When the pressure is selected, 4 mA is outputted at the atmospheric pressure, and 20 mA is
outputted at 1 MPa.
When the temperature is selected, 4 mA is outputted at -10C, and 20 mA is outputted at
+60C.

Maximum flow-rate value of the analog current output (Analog output FS flow-rate) [F2]

When the analog output is used by setting to the instantaneous flow-rate, it is recommended
that full scale flow-rate (FS flow-rate) of the analog current output be set with a value
corresponding to maximum flow-rate used.
It is recommended that a numerical value having a margin be set as a set value of the FS
flow-rate.
(Setting example of the FS flow-rate: A set value at the time of nominal diameter 50mm,
flow-rate conversion “With(ON)”, room temperature (30°C), pressure 0.7 MPa, flow speed
10m/s: 600 m

3

/h)

14

As a reference, Table 3-2 shows examples of conversion.

Table 3-2 Flow rate conversion examples

FWD025

FWD032

FWD040

FWD050

FWD065

FWD080

FWD100

FWD150

FWD200

Pressure

(MPa)

Temperature

(C)

0.6(m3/h) 0.6 0.5 3.6 3.2 4.7 4.3 6.4 5.8
35(m3/h) 35 32 210 190 280 250 370 330

1.1(m3/h) 1.1 1.0 6.5 5.9 8.7 7.8 12 11
65(m3/h) 65 59 390 350 510 460 690 630

1.3(m3/h) 1.3 1.2 7.7 7.0 10 9.3 14 13
80(m3/h) 80 72 470 430 630 570 850 770

2.5(m3/h) 2.5 2.3 15 13 20 18 27 24

150(m3/h) 150 135 890 800 1180 1070 1600 1440

4(m3/h) 4.0 3.6 24 21 32 29 43 39

240(m3/h) 240 220 1420 1280 1900 1710 2560 2310

5(m3/h) 5.0 4.5 30 27 40 36 53 48

300(m3/h) 300 270 1780 1600 2370 2140 3200 2880

10(m3/h) 10 9 59 53 79 71 110 96

500(m3/h) 500 450 2970 2670 3950 3560 5340 4810

24(m3/h) 24 22 140 130 190 170 260 230

1200(m3/h) 1200 1080 7120 6420 9490 8550 12810 11540

40(m3/h) 40 36 240 210 320 290 430 390

2000(m3/h) 2000 1800 11870 10700 15820 14250 21340 19230

0 (Atmospheric

pressure)

0 30 0 30 0 30 0 30

0.5 0.7 0.98

Output pulse unit [F9]

When a pulse output of the open drain output 1 (forward pulse output) is used, set the output
pulse unit in advance so as to suit your working conditions. The output pulse unit set here is
reflected in the open drain output 2 (reverse flow pulse output), too.

Contact output [F4]

You can select from the pulse output (reverse flow), the flow-rate upper/lower limit alarm output,
and the main unit aberration output. When the pulse output (reverse flow) is selected, set the
output pulse unit. However, when the output pulse unit is set in advance for the use of the open
drain output 1 (forward flow pulse output), it is not necessary to set it here.
For the upper/lower limit alarm output, an alarm can be outputted or stopped with a desired
flow-rate value.
When this function is selected, set the alarm output contact state (F3), the lower limit alarm
flow-rate (F5) and the upper limit alarm flow-rate (F6), and the alarm judgment value hysteresis
width (F7).

15

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mode

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ment

16

Notes:

(

[

]

1. “SW1+SW2” indicates that two switches are pressed simultaneously.

2. Indication cannot be changeover when the main display shows the instantaneous flow-rate
[L/min].

3. Accumulated flow volume (trip) is reset to zero in the following cases:

 When SW1+SW2 are pressed during the indication of accumulated flow volume (trip)
 If power supply is interrupted by a power failure [External power supply type]

Figure 4-2 Transitions between each operation mode

Main display (Forward flow

メイン表示（正流表示モード）

display mode)

Accumulated flow

正積算流量

volume

計
測

Sub-display (When main display displays Accumulated flow volume (Forward flow), Trip accumulated flow

モ

サ ブ 表示（ メイン 表示が正 積算流量、 トリッ プ積 算流量、 逆積算流 量のい ずれかの 場合）

volume, or Accumulated flow volume (Reverse flow))

|

Instantaneous flow

瞬時流量 圧力 温度

ド

Forward flow)

SW1

SW2

Measuring modes

SW3

Transition to settings mode

設定モードへ遷移

Clear trip accumulated flow volum e

SW1+SW2/ ﾄﾘｯﾌﾟ積算ｸﾘｱ

Trip accumulated flow

トリ ップ積 算流量

volume

SW1

Pressure

SW3 or three minutes of

SW3 or3min

inaction.

SW1

SW2

1min

One minute
elapses.

経過

SW2 or one minute elapses.

SW2

無操作

Instantaneous flow-rate

瞬時流量

Temperature

or1min経過

Switchover using

settings mode [F1]

[L/min]

SW2 (3s)

設定モード[F1]で切換

Transition to test mode

テストモードへ遷移

メイ ン表示（正逆流表示モード）

Main display (Forward flow display m ode)

ブランク

Blank

SW1

Accumulated flow rate

逆積算流量

(Reverse flow)

SW1

[L/min]

）

Accumulated flow

正積算流量

volume (Forward flow)

Sub-display (main display) under insta ntaneous flow-rate [L/min]

サブ 表示（メイン表示：瞬時流量の場合

SW2 (3 sec.) or test mode

SW 2 (3s ) or テス トモ ード

time ended.

時間終了

SW1

Instantaneous flow-rate

瞬時流量 [L/min]

L/min

17

4-

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Figure 4-

e main di

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ntaneous fl

Figure

flow-rate,

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ressure, a

buttons.

s the accu
flow-rate.

of measu

[F1: Indic

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in] and th

isplay (fo

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cycle from
n to accu

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re. The m

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rip accumu

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ter will re

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volume (f

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isplay

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Accumul

tedflowvolu

e

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Instantaneous

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By pre

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continue

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lation

Figure

-5 Trip acc

mulated f

ow volum

No overflo

Overflow

18

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volume (f

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SW1 is p

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Fi

ure 4-6 M

is selecte

essed, the

tantaneous

.

in display

in [F1: Ind

display will

flow-rate [

(forward/r

cation/outp

cycle from

/min] and

verse flow

t]:

accumulat

then to ac

)

d flow volu
umulated f

me

low

Test

mode

The test m

‒ Perfor

‒ During

‒ Test m

‒ When

‒ When

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Sub-di

In t
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the test m

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the test mo
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mode. Whe

ement mod
he test mo

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a possibilit

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a possibilit

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ion, etc., it

ntaneous f

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Indic

volume

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r column)

ain display
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” is presse

*1)

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shifted to t

tion that re

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ment mod

asured.

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onds.
three kind
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value of th

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indicates o
low-rate du

: 0 to 0.00
tion: -0.00

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: Forward a

ccumulate

,” the indic

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leases low

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the sub-dis

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en the “SW

d to the m
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ly a possibi
ing the test

[m3/h] →

to 0 [m

3

h]

edflowvolum

erseflow)

ccumulated

flow volum

tion chang

rate.

dication of

eous flow-r

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. When “S

is shifted to

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play (“m

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the test mo

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asurement

ous flow-ra

nstream si
ous flow-ra
tream side.
ue includes

lity.

mode is in

0.00 [m3/h]

→ -0.00 [

e

Instant

flow volum

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s in order

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te automat

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for 3 sec

mode.

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3

/h]

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ically.

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e[L/min]

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ed to the

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,

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e

the

ore,

,

1

Setting mode

‒ Press “SW3” to shift the flow meter to the setting mode. To shift from the setting mode to the

measurement mode, press the “SW3” again. When no operation is made for 3 minutes in
the setting mode, it is shifted to the measurement mode automatically. Press the“SW3” with
the M4 hexagonal wrench provided as accessory, etc. Note: “SW3” may be broken if
pressed by a sharp pointed tool.

‒ In the setting mode, setting details shown in the “Table 3-1 Setting items and standard factory

settings” (Page 12) can be changed.

‒ See figures of changeover of indication of various setting modes in Figure 4-2 for button

operation methods in the setting mode.

20

4-3. Setting items

[F1] Indication/output

In the indication/output, “forward flow (d.F.)” measurement or “forward/reverse flow (d.r.F)”
measurement is selected.
When the “forward flow” measurement is selected, the “forward accumulated flow volume (Total)”
or the “accumulated flow volume (Trip)” can be indicated on the main display by button operation.
When the instantaneous flow-rate is set with the analog output (4-20 mA), 4 mA becomes zero
flow-rate.
When the “forward/reverse flow” is selected, the “forward accumulated flow volume (Total)” or
“reverse accumulated flow volume (Total)” can be indicated on the main display by button
operation. The trip function cannot be used. When the instantaneous flow-rate is set with the
analog output (4-20 mA), 12 mA becomes the zero flow-rate.
See “4. Description of operation of display section” about the button operation.

[F2] Analog output FS (Full Scale) flow-rate

This function sets a full scale flow-rate value when the instantaneous flow-rate is set with the
analog output. On delivery from factory, the flow-rate value shown in the Table 3-1 or Table 3-2 is
set. When in use with the NORMAL conversion set to “With (ON)” set a NORMAL conversion
value.

[F3] State of contact output

Select "Normal open (n. OP)" or "Normal close (n. CL)."
Set this to "Normal open" in case of using a battery-powered signal receiving device.

[F4] Contact output

Select the output signal of open drain output 2 from “pulse output (reverse flow) (PULS),”
“main unit aberration output (Err),” “upper/lower limit flow-rate alarm output (AL),” and
“electronic statement output (COdE).”

“Main unit aberration output (Err)” outputs signals when one of the following occurs: ultrasonic
measurement aberration, pressure measurement aberration, temperature measurement
aberration, battery voltage reduction (for the built-in battery version only), and elapse of 11
years.

[F5] Lower limit alarm flow-rate

Use this to set the lower limit alarm flow-rate (5 digits) as the lower limit flow-rate value for the
upper/lower limit flow-rate alarm.

* This is the judgment value for flow-rate lower limit alarm output of open drain output 2.

[F6] Upper limit alarm flow-rate

Use this to set the upper limit alarm flow-rate (5 digits) as the upper limit flow-rate value for the
upper/lower limit flow-rate alarm.

* This is the judgment value for flow-rate upper limit alarm output of open drain output 2.

[F7] Alarm judgment value hysteresis width

With regard to the flow-rate value defined for the upper/lower limits of the upper/lower limit
flow-rate alarms, a hysteresis width range (4 digits) is defined for the alarm judgment value as
the range of flow-rates for terminating the alarm.

*This is the judgment value for flow-rate upper/lower limit alarm output of open drain output 2.

21

[F8] Flow-rate moving average number of times

This denotes the moving average number of times for the instantaneous flow-rate
measurement results.
Instantaneous flow-rate for display and output is the value that the moving average is applied
for the defined number of times of the most recently measured instantaneous flow-rate.
While this is usually set to “4 times (04)” and does not need to be changed,
you can choose from “No moving average (01),” “2 times (02),” “4 times (04),” “8 times (08),”
“16 times (16),”
“32 times (32),” and “64 times (64).”

[F9] Output pulse unit

Select the weight (unit: L/P) of the output pulse from 10 L/P, 100 L/P, and 1000 L/P.
The range of the setting is limited depending on the nominal diameter and settings you have
made in [F10] Pulse output mode or [F11] Flow-value conversion selection. Please see the
following table for details.

Figure 4-7 Output pulse unit selections

22

[F10] Pulse output method

Select from one of the five one-shot modes (ON time “50ms,” “100ms,” “125ms,” “250ms,” or
“500ms”) or Duty mode. Selecting one of the one-shot modes is recommended in case the
signal receiving instrument you are using is battery-powered. Make sure to check the
specifications of the signal receiving instrument and set the appropriate ON time from Figure
4-7.

[F11] Flow-rate conversion selection

Select "actual flow-rate (OFF)", "normal conversion flow-rate (Normal)", or "standard
conversion flow-rate (Standard)" for flow value conversion. If you select “normal conversion
flow-rate (Normal),” the “Normal” lamp above the partition line will flash. If you select “standard
conversion flow-rate (Standard),” the “Standard” lamp will flash. If you select “No conversion,”
both lamps will turn off. The accumulated flow volume display, instantaneous flow-rate display,
and output signal will all correspond to the selection of whether to convert the flow-rate or not.

See below for the definition of flow-rate conversion and the conversion equation.

󰇟/h󰇠 





273.15

󰇛

273.15  





󰇜

Q

: Normal conversion flow-rate [m3/h]

2

t: Measured temperature [°C]
P

: Measured pressure [kPa]

1

q

: Actual flow-rate [m3/h]

1

󰇟/h󰇠 

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

273.15  

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273.15  

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Q

: Standard conversion flow-rate [m3/h]

2

T: Standard conversion temperature [°C] [F12]
t: Measured temperature [°C]
P

: Measured pressure [kPa]

1

q

: Actual flow-rate [m3/h]

1

[F12] Standard conversion temperature

This is used to set the temperature [ºC] to use as the basis for standard conversion. The
temperature can be set within a range between -10ºC and +60ºC in 1ºC increments. This
setting is not available if an option other than standard conversion is selected in [F11].

[F13] Test mode time selection

Test mode times available for selection are "3 min. (3)," "60 min. (60)," and "Unlimited (--)."
During test mode, the unit on sub display blinks.

[F14] Fluid selection

Select either "Air (Air)" or "Nitrogen (N2)." Even if you specified a flow meter for air in your
initial order, you can change this setting so that it can be used for nitrogen.

[F15] Current output correlation value

Select "Instantaneous flow-rate (FLo)", "Pressure (PrS)", or "Temperature (tEP)" for the
functional assignment of the current output. When instantaneous flow-rate is selected, the
instantaneous flow-rate correlation value that you have selected in [F11] Flow-value
conversion selection will be used.

 󰇟󰇠󰇟17



101.33

 󰇟󰇠󰇟17



101.33

󰇠



󰇠



23

[F16] Low flow cutoff flow-rate

This is for setting the low flow cutoff flow-rate (Qcut) where the instantaneous flow-rate is
0m3/h.
The settable range is defined as 0 ≤ Qcut ≤ Qmin.
The set flow-rate will be the flow-rate you selected in [F11] Flow-value conversion selection.

[F17] Atmospheric pressure of the working environment

This is used to set the atmospheric pressure value (4 digits) [kPa] of the working environment
in absolute pressure. The standard factory setting has been set to 101.3 [kPa]. Leave this
setting unchanged unless you are operating the meter at higher elevations, etc.

[F18] With or without pressure value averaging

Set with or without pressure value averaging to either "With averaging (10)" or "No averaging
(1)." If "With averaging" is selected, the moving average value of the 10 most recently
measured pressures is used for display and output.

[F00] Reset of all of accumulated values

By selecting "Clear (cLr)", the values for Accumulated flow volume (Forward flow),
Accumulated flow volume (Reverse flow), and Trip accumulated flow volume are reset to zero.

[FFF] Reset to standard factory delivery settings

By selecting "Reset (SEt)", settings are reset to standard factory settings shown in Tab le 3-1.
However, "F9 Output pulse unit" alone will be set to 1000L/P for all nominal diameters, and
“F14 Fluid selection” will be set to Air.

24

Fi

g

m

n

n

g

A

v

s

5

v

g

u

A

s

e

put

e

c

S

m

o

m

e

W

n

n

SW3

Setting

ure of cha

or no operation for

3 minutes

ode

geover of i

Fi

Measurement

mode

Display · output

nalog output

dication of

ure 4-8 Di

Forward flow outpu

Flickering

arious sett

play chan

Forward/reverse flow outp

t

Flickering

ing modes i

eover in s

t

Flickering

shown bel

tting mod

Flickering Fl

ow.

e

ickering

* Use SW2

portion.

* Displays t

as select
conversio

to increment flickering

he converted informatio
d in F11 “Flow rate

selection."

State of contact

output

Contact output

Alarm output lower

limit flow-rate

Alarm output upper

limit flow-rate

Alarm judgment
value hysteresis

width

Flow-rate moving

average number of

times

Normal open

Pulse

Normal close

larm

Main unit

aberration out

lectronic

* Use S

2 to increment

flickeri

g portion.

Flickering

Flickering

Flickering

Flickering

4 times

Flickering

Flickering

Flickering

8 times

Flickering

Flickering

Flickering

16 times

Flickering

Flickering Fli

Flickering

* Use

incre
porti

32 times 64 ti

Flickering Fli

kering

W2 to

ent flickering

n.

mes 1 time

Flickeri

ckering

* Use SW2 to

increment
flickering
portion.

2 times

Output pulse

unit

2

)

At

t

)

出力パルス

Output pulse unit

F９

単位

SW１

(Other than standard

(ｽﾀﾝﾀﾞｰﾄﾞ換算以外)

conversion)

SW２

(Other than standard

(ｽﾀﾝﾀﾞｰﾄﾞ換算以外)

conversion)

SW２ SW１

出力パルス

F１０

SW２

F1１

SW２

F１２

SW2

SW２

(Standard

(ｽﾀﾝﾀﾞｰﾄﾞ換算)

conversion

Test mode time

テストモード

F１３

SW２ SW１

F１４

SW２ SW１

Current output

F１５

correlating value

SW２

Low flow cutoff

F１６

カットオフ値

SW２

使用環境の

pressure in the

F１７

SW２

With or without
pressure value

F１８

平均化有無

SW２

Clear accumulated

積算値クリア

F００

SW２

Reset parameters

FFF

Output pulse

selection

選択

Flow-rate

流量換算

conversion

有無選択

selection

Standard

スタンダード

conversion

換算温度

temperature

selection

時間選択

Kind of gas

ガス種

電流出力

相関値

ローフロー

mospheric

operating

大気圧

environmen

圧力値

averaging

values

パラメータ

リセット

SW１+SW２

SW１+SW２

SW１

SW１+SW２

SW１+SW２

SW1

SW１

(Standard

(ｽﾀﾝﾀﾞｰﾄﾞ換算)

conversion

SW１+SW２

SW１+SW２

SW１

SW１+SW２

SW１+SW２

SW１+SW２

SW１+SW２

SW１+SW２

SW１+SW２

SW１

SW１+SW２

SW１+SW２

SW１

SW１+SW２

SW１+SW２

SW１

SW１+SW２

SW１+SW２

SW１

SW１+SW２

SW１+SW２

SW１

SW１+SW２

SW１+SW２

One-shot pulse:

ﾜﾝｼｮｯﾄﾊﾟﾙｽ：50ms

50 ms

No conversion

換算なし

SW２ SW２

3 min

３分

Air

Flow-rate

流量

Flickering Flickering Flickering

Flickering Flickering Flickering Flickering

With averaging No averaging

有り（10回）

Not to be

クリアしない

Not to be reset

One-shot pulse:

ﾜﾝｼｮｯﾄﾊﾟﾙｽ：100m s

100 ms

SW１

Normal conversion Standard conversion

ノルマル換算

SW１

Flickering

点滅

SW１

Flickering

点滅

SW１

空気

SW１

SW２

Pressure

SW１

点滅

SW１

SW１

無し（1回）

SW１

SW２

To be cleared

クリアする

SW１

SW２

To be reset

リセットするリセットしない

SW１

SW２

One-shot pulse:

ﾜﾝｼｮｯﾄﾊﾟﾙｽ：125ms

125 ms

SW１ SW１ SW１

SW１

スタンダード換算

SW１

SW１

Flickering

点滅

SW１

SW１

60 min

60分

SW１

Nitrogen

窒素

圧力 温度

SW１

点滅点滅 点滅

SW１

点滅

Unlimited

無制限

SW１

Temperature

SW１SW１

SW１

SW１ SW１

点滅

One-shot pulse:

ﾜﾝｼｮｯﾄﾊﾟﾙｽ：250ms

点滅

Flickering

* Use SW2 to increment f lickering

※SW２で点滅部

インクリメント

* Displays the converted inf ormation as

※F11「流量換算選択有無」にて

One-shot pulse:

ﾜﾝｼｮｯﾄﾊﾟﾙｽ：500ms

※SW２で点滅部

flickering portion.

インクリメント

500 ms

SW１

250 ms

* Use SW2 to increment

portion.

selected in F11 “Flow rate conversion

選択した換算情報が表示される

selection.”

点滅

* Use SW2 to increment

※SW２で点滅部

flickering portion.

インクリメント

duty

26

5. Wiring (External Power Supply Type)

Please be sure to conduct the wire connection using the optional cable for external connection
as follows.

Figure 5-1 Wiring diagram

The main body and GND are electrically common.
Use an isolated power supply and a remote display as necessary.

Notes:

1. When installing the flow meter around an electric noise source, ground the braided
shield of the external connection cable.

2. Cut off the brown lead wire at its root to prevent it from contacting others.

3. Do not perform the insulation resistance and withstand voltage test.

27

Note on open drain output setting

This meter gives you a choice of two types of outputs: duty output and one-shot output. The
meter is set to duty output when it leaves the factory.
Under duty output, the ON:OFF times are 1:1. Under one-shot output you can set the ON
times shorter between 50 to 500ms (Figure 5-2). Therefore, if you are using a battery-powered
pulse receiving signal receiver, using a one-shot pulse output is recommended to improve
battery life.
Please keep the following points in mind with regard to selecting one-shot.

 Check the waveform corruption caused by the cable (line capacity, line resistance) and

the minimum input signal width of the signal receiver to choose the appropriate ON
time.

 ON/OFF will reverse if you choose "Normal close."

Figure 5-2 One-shot output and duty output

(Example with pulse constant at 1000L/P, and Normal open)

Example of pull-up resistance calculation

Check the pulse receiving signal receiver's specifications (power supply voltage Vdd [V] and
ON current Ion [mA]) and select the pull-up resistance constant using equation (1).

R[Ω]＝[(Vdd-0.2)/(Ion×10-3)]-24.7・・・(Equation 1)

*Do not allow the current Ion to exceed the maximum load of 24 VDC and 50 mA.

Example where Vdd=24V and Ion=10mA

R[Ω]=[(24-0.2)/(10×10-3)]-24.7=2355[Ω]≒2.2[kΩ]

28

6.

O

n

r

n

c

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ence is occ

you are r

kering pilo

en or close

ng of the v
urring betw

nning the

lamp indic

valves abr

lve all at on

en the ups
eter for the
tes that th

Figure

ptly. Make

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ream side

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eter if a p

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Normal

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32

8. Power Interruption (External Power Supply Type)

Detection of power failure

The drop of a power source voltage to 18±1.1V or lower is judged to be a power failure. As a
result, the measurement is stopped, and the last accumulated value is stored, and the LED
display is turned off.

Reset from power failure

When a power source voltage rises to 18.8±1.1V or higher, the measurement is resumed with
the total value recorded right before the power interruption, and the LED is turned on.

33

9. Battery Life (Built-In Battery Type)

The life of the built-in battery is 10 years. (This is the life at the environment temperature of 20C.
The battery life fluctuates depending on conditions such as the ambient temperature and output
settings.)

* In the case the battery run out earlier due to reasons of high environment temperature, etc., the

battery is possible to be replaced at our plant as a fare-paying service. Contact our branch or
sales office nearby.

34

10.

ycon

n

e

b

t

a

e

v

a

o

u

c

a

e

a

t

t

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p

p

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Cntls

v

C

s

C

b

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COp

Mts

w

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S

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8

8

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If

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Insta

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conn

Trou

ou encoun

tact our br

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Even op

gs

buttons,
settings

The me
aberrati

llation

It starts
start ac
immedia

The inst
flow-rat
value.

Pulses
incorrec

g

ction

The curr
4-20mA

leshoo

er any prob

nch or sal

henomenon

rating the

unable to set a

alue.

surement
n indicator ligh

▲

p but does not
umulation
tely.

ntaneous
shows a nega

re counted
ly.

ent value of th
output is too s

ing

ems that c

s office.

Attempting
the range

Using a flu
Using the
specificati

s.

conditions,
Foreign m
interior of t
ultrasonic
There is a
noise near

Carrying o
pressure fl

The directi

ive

flow directi
of each ot
The pull-u

The pull-u

The one-s
or smaller
minimum i

Load resis
The settin

all.

FS flow-ra

nnot be re

Possible cau

to set a value

f settable valu

id other than ai

eter outside it

ns (such as fo

pressure, tem

terial is attach

he measureme

ensors.

major source o

the flow meter.

t adjustments

ctuations.

n of the fluid fl

on of the meter

er.
resistor is too

resistor is too

ot pulse ON ti
han the signal

put signal widt

ance is 400Ω

value for the

e is too large.

olved by ta

e

hat is outside

s.

or nitrogen.

range of

installation

erature).

d to the

t pipe or

electrical

ue to

ow and the

are opposite

large.

small.

e is equal to
receiver's
h.

r larger
nalog output

ing the ste

Re

heck to see th

itrogen) indica
ime of settings
ights, this is in

et a value outs

alues.

heck all remin

pecifications a

heck to see if

etween the m
lickering.
f it is, it means

ndergoing adj
luctuations. Thi

omplete in ab

ccumulation s

heck to see th

urface of the fl
he direction of

heck the sign

N current and

ull-up resistor.

ake sure to s

ime sufficiently

ignal receiver'

idth.
eep the resist
et an appropri

low-rate [F2] to

s describe

edial action

at the kind of g

or does not lig
mode. If this in
ication of atte

ide the range o

ders regarding
nd installation.

the partition lin

in and sub-dis

that the meter i

stments for pr
s should typica
ut 1 minute aft

ould begin.

at the arrow on

w meter is poi
he fluid flow.
l receiver's sp
select an appr

t the one-shot
large enough f
minimum inpu

nce below 40

te analog out

suit your need

below, ple

s (air or

t at the

icator
pting to
settable

lays is

s

ssure

lly

r which

the

ting in

cified

priate 2

ulse ON

r the

t signal

Ω 2
ut FS

.

Refe

1

3

2

2

se

ence

e

1

3

Phenomenon Possible cause Remedial action

Check to see that the operating pressure
falls between 0 to 1MPa (Gauge
pressure).

Check to see that the operating
temperature falls between -20ºC and
70ºC.
Do not use gases other than air or
nitrogen.

This is normal. Installation of the meter
farther away from the pressure governor
is recommended to take accurate
measurements.

Check to see that the value unit on the
sub-display is not flickering.
Please make sure to properly install
straight pipe sections up and
downstream of the meter to suit your
specific piping conditions.
Check to see that the correct value unit
for the application is used.

Use the meter within the scope of its
specifications.

Please make sure to properly install
straight pipe sections up and
downstream of the meter to suit your
specific piping conditions.
Check to see that the correct value unit
for the application is used.
If it is, it means that the meter is
undergoing adjustments for pressure
fluctuations. This should typically
complete in about 1 minute.
(The partition line may also flicker
momentarily during other actions, such
as when a valve is opened or closed)
This is normal.
Refer to the page indicated to the right to
revert to accumulated flow volume
(forward flow) or accumulated flow
volume (reverse flow) display.

After
start
operation

Sub-display flickers
(pressure and
instantaneous flow-rate)

Sub-display flickers
(temperature and
instantaneous flow- rate)

The instantaneous
flow-rate appears to be
fluctuating.

The instantaneous
flow-rate does not fall to
zero even there is no flow.

The instantaneous
flow-rate is too large.

The instantaneous flow
rate does not seem to
change.

The instantaneous flow
rate is too small.

The partition line is
flickering.

There is no "0" displayed in
the upper most digit of the
Accumulated flow volume.

The working pressure range has been
exceeded.

Pressure sensor failure Contact our branch or sales office.

The operating temperature range has
been exceeded.

Gas other than air or nitrogen is being
used.
The pressure fluctuates frequently. This is normal.

A pressure governor is installed near the
flow meter.

The fluid is convecting in the pipe. This is normal.

Test mode is on.

The straight section of the pipe is not
long enough.

It shows the normal flow rate display.

There is excessive flow rate.

The straight section of the pipe is not
long enough.

The display shows the Actual flow-rate.

Carrying out adjustments due to
pressure fluctuations.

The display is set to trip accumulated
flow volume display.

Reference

page

30–32

30–32

30–32

9

19
23

8
9

12
23

12

8
9

12
23

16
18

36

11. Outline Diagram

37

Warranty and Maintenance

1. Scope of application

To use this equipment, the following conditions must be met:
‒ the use of the equipment incurs no risk of a serious accident even if a failure or malfunction

occurs on the equipment, and

‒ in case of product failure or malfunction, safety measures such as redundant design, prevention

of malfunction, fail safe system mechanism are provided.
Be sure to use this instrument under the conditions or environment mentioned in this instruction
manual. Please consult us for specifications for the following applications:

Harsh conditions for electronics, or other usages that may have large impact on lives,
bodies, property, or other rights or interests

2. Operating conditions and environment

For the operating conditions and environment, refer to "For safe and proper use".

3. Precautions and prohibitions

Refer to "For safe and proper use".

4. Warranty

4.1. Period of warranty

(1) Warranty period for this product including accessories is one year after delivery.

(2) Warranty period for the parts repaired by our service providers is six months after the completion

of repair.

4.2. Scope of warranty

(1) If any failure or malfunction attributable to Fuji Electric occurs in the period of warranty, we shall

provide the product after repairing or replacing the faulty part for free of charge at the place of

purchase or delivery. The warranty does not apply to failure or malfunctions resulting from:

a) inappropriate conditions, environment, handling or usage that is not instructed in a catalog,

instruction book or user's manual, or overuse of the product,
b) other devices not manufactured by Fuji Electric,
c) improper use, or an alteration or repair that is not performed by Fuji Electric,
d) damages incurred during transportation or fall after purchase,
e) any reason that Fuji Electric is not responsible for, including a disaster or natural disaster such

as earthquake, thunder, storm and flood damage, or inevitable accidents such as abnormal

voltage.

(2) Regardless of the time period of the occurrence, Fuji Electric is not liable for the damage caused

by the factors Fuji Electric is not responsible for, opportunity loss of the purchaser caused by
malfunction of Fuji Electric product, passive damages, damage caused due to special situations
regardless of whether it was foreseeable or not, and secondary damage, accident compensation,
damage to products that were not manufactured by Fuji Electric, and compensation towards
other operations.

38

5. Failure diagnosis

Regardless of the time period of the occurrence, if any failure occurs, the purchaser shall perform a
primary failure diagnosis. However, at the purchaser's request, Fuji Electric or our service providers
shall provide the diagnosis service for a fee.

6. Service life

This product, excluding some limited-life parts, is designed for a service life of 10 years under general
operating conditions.
The service life may be shortened depending on operating conditions and environment. To ensure the
service life, it is important to perform planned maintenance of the product.

7. Maintenance plan

Maintenance can be divided into "preventive maintenance" and "corrective maintenance". Preventive
maintenance is achieved through systematic implementation of "periodic inspection".

Maintenanc Preventive maintenance

(1) Periodic inspection

Corrective maintenance

Periodic inspection

Troubleshooting

Periodic inspection is to replace limited-life parts before their service lives are over, thus preventing
failure. Recommended inspection interval is 6 months to 12 months. If you are using the instrument
under harsh environment, we recommend you to shorten the inspection interval.

(2) Corrective maintenance

Corrective maintenance is a measure to be taken after a trouble has occurred. Refer to 10.
Troubleshooting. If the measures mentioned in this instruction manual do not solve the problem,
please contact one of our sales offices or service offices.

8. Limited-life parts

This product uses some limited-life parts, such as flange packings for the wafer connection type,
which may affect the service life of the product itself. Estimate the lifetime of those parts according to
your operating environment, and replace them at appropriate time.

9. Spare parts and accessories

Refer to "Confirmation of package contents" for spare parts and accessories.

10. Period for repair and provision of spare parts after product discontinuation

The discontinued models (products) can be repaired for five years from the date of discontinuation. In
addition, most spare parts used for repair are provided for five years from the date of discontinuation.
However, some electric parts may not be obtained due to their short life cycle. In this case, repair or
provision of spare parts may be difficult even in the above period.
Please contact one of our sales offices or service offices for further information.

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