Ultrasonic Flow Meter for Air

ATZTA

TRX
Operation Manual

Table of contentsPreface/Request

Outline of product

Important noticeFor safe and proper use

1.

Introduction...................................................................................................................... 1

2.

1-1

Confirmation of package contents ........................................................................... 1

1-2

Name of each part ................................................................................................... 1

1-3

Flow of operation start ............................................................................................. 2

Settings ........................................................................................................................... 3
2-1

Standard factory delivery settings ............................................................................ 3

2-2

Procedures to change settings ................................................................................ 5

2-3

Details of setting items ........................................................................................... 10

3.

Installation ..................................................................................................................... 15

4.

Wiring connection.......................................................................................................... 19

5.

Operation....................................................................................................................... 24

6.

Display and output under aberrant states ..................................................................... 24

7.

Operation modes........................................................................................................... 28

8.

Processes during power outages (external power supply specification: D, RS485
output specification: R) ................................................................................................. 31

9.

Specifications ................................................................................................................ 32

10. Dimension drawing........................................................................................................ 34
11. Troubleshooting............................................................................................................. 35
Warranty and after-sale service ............................................................................... 37 Preface/Request
Thank you very much for purchasing the Ultrasonic Flow Meter for Air TRX[Nominal
Diameter] [Power Supply Specification]-[Kind of Gas]/5P this time. Please be sure to readthis Operation Manual to use this product correctly and safely and to prevent failures.
RequestPlease arrange for operators who actually use this product to know the context of thisOperation Manual surely.
This Operation Manual becomes necessary for performing maintenance, too. Pleasekeep the Manual in a safe place until this product is disposed of.

 Outline of productNominaldiameterPower supply specification

25

D: External power supply

32

specification
B: Built-in battery

40
65

specification
R: RS485 output

80

specification

50

Kind of gas

C: Factory-supplied air
N: Nitrogen

This flow meter is the ultrasonic flow meter for air and nitrogen capable of measuring theflow at pressure from the atmospheric pressure to less than 1 MPa. The flow meter isinstalled to pipes by screwing its taper pipe threads to the pipes or by being tightened
between pipe flanges.
Screw connection type (Taper pipe threads) applied models: TRX25, TRX32


Wafer connection type (Installation between pipe flanges and by tightening withbolts) applied models: TRX40, TRX50, TRX65, TRX80

The flow meter satisfies the following standards.


EN61326-1：2013 Table 2 (EMS)
EN55011:2009+A1:2010 Group 1 Class A (EMI) Important notice
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.
Structure of warning indications

Danger

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

Warningor 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

Note

according to a penal regulation for violation of laws and ordinances.
This symbol indicates that improper operation may result in an accident.
This symbol indicates prohibited acts.
This symbol indicates matters you should observe without fail.

 For safe and proper use
Precautions for use
1. Do not use for applications that require safety, such as nuclear, railroad,aircraft, vehicle, playground equipment, etc.
2. Do not modify the product.
3. Do not use the product for foods, drinks, medical chemicals, etc., because
it is not of sanitary specifications.
Danger
4. Do not use the product in the atmosphere of an inflammable gas, etc.,
because it is not of explosion-proof specifications.
Working environment and applicable fluid
1. Do not apply any fluid other than air (compressed air used in factories) or
nitrogen to this flow meter. (The meter can be applied for nitrogen byfactory setting before shipment from our factory.)
2. 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
3.
4.
Note

5.
6.

7.

MPa) in use. There must be no condensation.
Avoid usage in an ambient containing a corrosive gas (chlorine, hydrogensulfide, 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 theexternal connection cable.
Ground the 0 V terminal without fail, and do not ground the 24 V(+)
terminal.
Because the cabinet is connected to SG (0 V), if the 24 V(+) terminal has
been grounded, the + and - of the power supply is short-circuited throughpiping.
The installation of a sunshade is recommended if the flow meter is
exposed to direct sunlight.

Notes for operations
1. This flow meter is not a specified measuring instrument defined inJapanese measurement law.
2. When opening or closing a valve, open or close the valve not all at oncebut gradually.
Opening or closing of the valve all at once may cause a failure of the flow
Notemeter if a pressure difference is occurring between the upstream side anddownstream side of the valve.
Storage
1.
2.
Note

3.

Store the flow meter at a place away from fire and not exposed to direct
sunlight.
Do not place any combustible material, inflammable substance andheating 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.

Piping

Warning

1.

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

2.

Do not hold the display section of this flow meter.

1.

In the case a flow-regulating valve, etc., that may cause turbulence of theflow 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 thepipe(s).
Vertical piping is recommended when mist, dust, etc. are contained in alarge amount. In horizontal piping, install the flow meter in such a way thatthe display section faces upward.
Do not install the product in locations where strong compressive force,
tensile force, or load may be applied.
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 otherthan the rotating direction.
Keep hands off the ultrasonic sensors.

2.
3.
4.
Note

5.
6.
7.
8.

Wiring1.
Danger

2.
3.
1.
2.

Note

3.
4.
5.
6.
7.

When performing wiring work, follow the instructions in this Operation
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 nearto 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 toan 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 theexternal power supply is interrupted.
Do not perform operation and the wiring work with wet hands.

Disassembling and inspection
1. Do not disassemble this flow meter.
2. Presence of fluid flow makes a pilot lamp flicker in a normal state. In thecase of no flickering of the pilot lamp, contact our branch or sales officenearby.
3. If mist and/or dust are contained in a large amount, disconnect the flow
Notemeter periodically to check for the presence of dirt etc., and remove it asnecessary.
4. Be careful not to touch the ultrasonic sensors during inspection.
Disposal
1.
Warning

Since the flow meter is made by putting metals and resin parts together, it
must be discarded as industrial waste.

1. Introduction
1-1 Confirmation of package contents
Upon delivery of the product, confirm that the following items are contained in the
package:
Name
Ultrasonic flow meter

Quantity1

Centering collars

4M4 hexagonal wrench

1Flange gasket
Operation manual
Bolt set(Bolts/nuts/plain
washes)2
1

External connection
cable

FLOW
METER

CENTERINGCOLLARS

1 set

1RemarkFor its use, refer to 3. Installation (page 15). Accessory of the wafer
connection type.
The wrench is to be used to untighten and tighten the set screw
when changing direction of the display section and to press the backcenter button (SW3).
Accessory of the wafer connection type.
The bolts/nuts/plain washers are put into a bag in a set of required
quantities.
Accessory of the wafer connection type.
[External power supply] 5m• •Standard accessory,20m• •Option part
[RS485 output] 5m• •Standard accessory,20m• •Option part
[Built-in battery] 5m• •Option part,20m• •Option part

M4 HEXAGONALWRENCHFLANGE GASKETOPERATION
MANUALBOLT SET

EXTERNAL
CONNECTION CABLE

1-2 Name of each part
EXTERNAL OUTPUT
外部出力コネクタ
CONNECTORDISPLAY
表示部

SETTING
設定ボタン
BUTTON

Screw connection
type
SPECIFICATION

BODY
本体 CASING

仕様銘板
NAME PLATE
Ser．No．の上位４桁は
FIRST
4 DIGITS OF SERIAL
製造年月を記載
NO. DENOTE
A
MANUFACTURING DATE.

Wafer connection type

SET
SCREW
セットビス

ULTRASONIC SENSOR
超音波センサー1Perspective view of back surface
BACK RIGHT BUTTON [SW2]
BACK LEFT BUTTON [SW1]

BACK CENTER BUTTON [SW3]

BACK RIGHT BUTTON [SW2]

BACK LEFT BUTTON [SW1]

ACCUMULATED FLOWVOLUME (UPPER COLUMN)PILOT LAMPINSTANTANEOUS FLOW-RATE(LOWER COLUMN)

1-3 Flow of operation start
The basic flow up to the start of operation is as follows.
Although the settings can be made after installation as well, it is recommended toperform the settings prior to installation.

(Settings)（設定）

設置
Installation

結線
Wiring connection

運転
Operation

Settings
With this flow meter, settings of 25 items concerning measurement,
output, and communication are available.
Usually, at the time of purchase, the "standard factory delivery
settings" have been made, and the user can use the flow meter as it
is. If the settings are to be changed according to the customer's
operational circumstances, refer to "2. Settings."
Installation
The recommended conditions, precautions, etc. for piping aredescribed in "3. Installation."
Depending on the conditions of piping, correct measurement may not
be made, and therefore this description must be read without fail.
Wiring connection
Wiring connection with power supply and a signal receiving device, as
well as precautions, etc. are described in "4. Wiring connection.” This
description must be read without fail in order to ensure that the flow
meter should be used correctly.
Operation
Precautions when starting operation are described in "5. Operation."22. Settings
2-1 Standard factory delivery settings
With this flow meter, settings of 25 items concerning measurement, output, andcommunication are available. (Table 2-1)
At the time of purchase, the "standard factory delivery settings" have been made, andthe user can use the flow meter as it is.
When changing the standard factory delivery settings, perform operation according to
the procedures described on pages 5 through 7.
Hereafter, built-in battery specification is denoted as B, external power supply
specification as D, and RS485 output specification as R.
Table 2-1 Setting items and standard factory delivery settings
Paneldisplay
F1

Corresponding setting
item
Display・Output

F2

Analog output
full scale flow-rate

F3

State of contact output

F4*2

Contact output

F5
F6
F7
F8
F9
F10
F11
F12
F13

Scope of settingStandard factory delivery settings
B
D
R

Forward flow, forward and reverse
flow

Forward flow

0 to 99999 [m3/h] *1

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

Lower
limit
alarm
-59999 to 59999 [m3/h] *1
flow-rate
Upper
limit
alarm
-59999 to 59999 [m3/h] *1
flow-rate
Alarm judgment value
0 to 9999 [m3/h] *1
hysteresis width
Flow-ratemovingaveragenumberof 01, 02, 04, 08, 16, 32, 64 [times]
times
Output pulse unit
Refer to Table 2-2.
Duty or one shot
Pulse output method
50, 100, 125, 250, 500 [ms]Flow-value conversion Yes (Normal),selection
Yes (Standard), No conversion
Standard
conversion-10 to 60 [°C]
temperature
Test
mode
time
3, 60, Unlimited [minutes]
selection

25A:300
32A:600
40A:700
50A:1200
65A:2000
80A:2500
Normal open
electronic statement
output0 [m3/h]59999 [m3/h]
0 [m3/h]04 [times]
100 [L]
Duty
Yes (Normal)
20 [°C]
3

F14

Fluid selection

Air, Nitrogen

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

F15

Current
output Instantaneous flow-rate, pressure,correlation value
temperature

Instantaneous flow-rate

3

Paneldisplay

F16

F17
F18
F19*4
F20*4
F21*4
F22*4
F23*4
F00
FFF*5

Corresponding setting
item

Scope of settingStandard factory delivery settings
B

D

R

25A:0.1
32A:0.2
40A:0.2
50A:0.4
65A:0.6
80A:0.8

Low flow cutoff flow-rate 0≤Setting value≤Qmin*3 [m3/h] *1

Atmospheric pressure of
000.0 to 999.9 [kPa]
the working environment
With or without pressureWith (10 times), without (1 time)value averaging
RTU address
001 to 247
RS485 communication 9600, 19200, 38400,
bit rate
57600, 115200 [bps]RS485 stop bit length
1, 2 [bit]RS485 parity bit
None (--), Even (En), Odd (od)With or without RS485
With, without
terminal resistor
Reset
of
all
of
To be cleared, not to be cleared
accumulated values
Resettostandard
To be reset, not to be reset
factory delivery settings

101.3
With (10 times)
001
115200[bps]
1 [bit]Even (En)
Without
Not to be cleared
Not to be reset*1 The unit correlates to selection of the setting "F11: Flow-value conversion selection".
*2 This is an output item for contact output 2 and is selectable only for B and D.
*3 Qmin is the following value depending on the nominal diameter.
25A

32A

40A

50A

65A

80A

0.6

1.1

1.3

2.5

4.0

5.0
[m3/h] *1*4 This is an item related to RS485 communication and is selectable only for R.
*5 After resetting, "F9: Output pulse unit" will be set to 1000 [L], and “F14: Fluid selection” will be
set to Air.

4

2-2 Procedures to change settings
Change in settings should be made by button operation by referring to the display
switching flow.
SW3 should be operated by using the hexagonal wrench included as the accessory, etc.
Pressing it with any pointed sharp blade will become the cause of damage.
Measurement
計測モード
mode

SW3 or no operation for
3 minutes
SW３ or
３分無操作
Setting
設定モード
mode

SW３
SW１+SW２

SW１

F1

正逆流出力
Forward正流出力
flow output SW１ Forward/reverse
flow output

表示・出力
Display∙ output

SW２

SW１+SW２
SW１

SW１

SW２

点滅
Flickering
SW１+SW２

F２

SW１

点滅
Flickering

点滅
Flickering

SW１

点滅
Flickering

SW１*※SW２で点滅部
Use SW2 to increment flickering
portion.
インクリメント* Displays the converted information
as selected in F11 “Flow rate
※F11「流量換算選択有無」にて
conversion selection."
選択した換算情報が表示される

点滅
Flickering

SW１

Analogoutputアナログ出力
SW１+SW２
SW１

SW２

F３

SW１
SW１+SW２

ノーマルオープン
Normal open SW１

ノーマルクローズ
Normalclose
パルス出力State of contact
接点出力状態
output
SW１+SW２
SW２

SW１

SW１
パルス
Pulse

SW１

Main unit
Electronic
本体異常出力電文出力
SW１ aberration output SW１ statement output

警報
Alarm

SW１+SW２

F４

接点出力Contact
output
SW１+SW２

*

SW１
SW２

SW１

Flickering
点滅

SW１

Flickering
点滅

SW１

Flickering
点滅
SW１

Flickering
点滅 SW１Use
SW2 to increment※SW２で点滅部
flickering
portion.
インクリメント点滅
Flickering

SW１+SW２

F５

Flickering
点滅

SW１

警報出力
Alarm
output lower
limit
flow-rate
下限流量
SW１+SW２
SW2

点滅
Flickering
SW2
SW１

SW２

SW１

点滅
Flickering

SW１+SW２

F６

SW１

点滅
Flickering

点滅
Flickering

SW１

SW１

点滅 SW１Flickering

点滅 SW１Flickering

点滅
Flickering

警報出力
Alarm
output upper
limit
flow-rate
上限流量* ※SW２で点滅部
Use SW2 to
インクリメント
increment
flickering
portion.

SW１+SW２
SW２

SW１+SW２

F７

SW１

SW１

Alarm
judgment
警報判定値
value hysteresis
ヒステリシス幅
width

Flickering
点滅

SW１

4 ４回
times

SW１

Flickering
点滅

Flickering
点滅

Flickering
点滅* ※SW２で点滅部
Use SW2 to
インクリメント
increment flickering
portion.

SW１+SW２
SW１

SW２

SW１

8 times
8回

1616回
times

SW１

SW１

32 32回
times

SW１

64 64回
times

SW１

1 time
1回

SW１+SW２

F８

Flow-rate moving
移動平均回数
averagenumber oftimes

SW１+SW２
SW２

SW１+SW２

F９

SW１

SW１
1000L/P

SW１

100L/P

SW１

10L/P

Output
pulse
出力パルス
unit
単位
SW１+SW２

SW２

SW１

SW１

Fig. 2-1 Flow of display changeover in settings mode (B, D) (1/2)

5

SW１

2回
2 times出力パルス
Output
pulse
unit
単位

F９

SW２

SW１

One-shotpulse: 50 ms
ﾜﾝｼｮｯﾄﾊﾟﾙｽ：50ms

One-shotpulse: 100 ms One-shot
pulse: 125 ms One-shot
pulse: 250 ms One-shot
pulse: 500 ms
ﾜﾝｼｮｯﾄﾊﾟﾙｽ：125ms
ﾜﾝｼｮｯﾄﾊﾟﾙｽ：500ms
ﾜﾝｼｮｯﾄﾊﾟﾙｽ：100ms
ﾜﾝｼｮｯﾄﾊﾟﾙｽ：250ms
SW１
SW１
SW１
SW１
SW１

SW１+SW２

出力パルス
Outputpulse
selection
選択

F１０

SW１+SW２
SW１
SW２

SW１

No conversion
換算なし

SW１

Normalconversion
ノルマル換算Standard conversion

SW１ スタンダード換算

SW１+SW２
Flow-rate
流量換算
conversion
有無選択
selection

F1１

SW１+SW２
SW1
SW１(Standard(ｽﾀﾝﾀﾞｰﾄﾞ換算)
conversion)

SW２
SW１(ｽﾀﾝﾀﾞｰﾄﾞ換算以外)(Otherthan standard
conversion)

SW１

Flickering
点滅

SW１

点滅
Flickering

点滅
Flickering

SW１

SW１+SW２* Use SW2 to increment※SW２で点滅部
flickering portion.
インクリメント

Standard
スタンダードconversion
換算温度
temperature

F１２

SW１+SW２
SW２

SW2
SW２
(Standard(ｽﾀﾝﾀﾞｰﾄﾞ換算)
conversion)

SW２

SW１

SW１

SW１+SW２
SW２(Otherthan(ｽﾀﾝﾀﾞｰﾄﾞ換算以外)
standard
conversion)

Flickering
点滅

3 min
３分

SW１

60
分
60min

SW１

Nitrogen
窒素

SW１

Unlimited
無制限

Testmode time
テストモードselection
時間選択

F１３

SW１+SW２
SW２

SW１

SW１
SW１+SW２

Air
空気

Kind
of gas
ガス種

F１４

SW１+SW２
SW２

SW１

SW２

Flow-rate
流量
SW１+SW２

SW１

Pressure
圧力

温度
SW１ Temperature

Current
output
電流出力
correlating value

F１５

相関値

SW１+SW２
SW１

SW１

SW２

Flickering
点滅
SW１+SW２

F１６

SW１

Flickering
点滅

SW１

Flickering
点滅

ローフロー
Low flow cutoff
カットオフ値*※F11「流量換算選択有無」にてDisplays the converted information as
selected in F11 “Flow rate conversion
選択した換算情報が表示される
selection.”

SW１+SW２
SW１

SW１

SW２

Flickering
点滅
SW１

Flickering
点滅
SW１

SW１+SW２

F１７*※SW２で点滅部
Use SW2 to increment flickering
portion.
インクリメント

Atmospheric pressure
使用環境のin the operating
environment
大気圧

Flickering
点滅 SW１Flickering
点滅* ※SW２で点滅部
Use SW2 to increment
flickering portion.
インクリメント

SW１+SW２
SW２

SW１

SW１

With averaging
有り（10回）(10 times)

SW１+SW２
SW２

No averaging
無し（1回）(1 time)

SW１+SW２

With or without
圧力値
pressure value
平均化有無
averaging

F１８

SW１

SW２

SW１
Not to be

クリアしないcleared

SW１

To
be cleared
クリアする

SW１+SW２

F００

Clear accumulated
積算値クリアvalues

SW１+SW２

SW１+SW２

FFF

SW２

SW１

SW２

Not
to be reset
リセットしないSW１

To
be reset
リセットするReset
パラメータ
parameters
リセット
SW１+SW２

SW２

Fig. 2-2 Flow of display changeover in settings mode (B, D) (2/2)

6

duty

Measurement
計測モード
mode

SW3 or no operation forSW３ 3orminutes
３分無操作
Setting
設定モード
mode

SW３
SW１+SW２

SW１

F1

正逆流出力
Forward正流出力
flow output SW１ Forward/reverse
flow output

Display∙ output
表示・出力

SW２

SW１+SW２
SW１

SW１

SW２

Flickering
点滅
SW１+SW２F２

SW１

Flickering
点滅

Flickering
点滅

SW１

Flickering
点滅

SW１

*

Flickering
点滅

SW１

*

Use SW2 to increment flickering※SW２で点滅部
portion.
インクリメント

Displays the converted information

as selected in F11 “Flow rate
※F11「流量換算選択有無」にて
conversion selection."
選択した換算情報が表示される

Analogoutputアナログ出力
SW１+SW２
SW１

SW２

F３

SW１
SW１+SW２

Normal open
ノーマルオープン
SW１

Normalclose
ノーマルクローズ
パルス出力

State of contact
接点出力状態
output
SW１+SW２*

SW１

Use SW2 to increment※SW２で点滅部
flickering
portion.
インクリメントSW２

SW１

Flickering
点滅

Flickering
点滅

SW１

SW１

Flickering
点滅
SW１

Flickering
点滅 SW１Flickering
点滅

SW１+SW２

F５

Flickering
点滅

SW１

警報出力
Alarm
output lower
limit
flow-rate
下限流量
SW１+SW２
SW2

点滅
Flickering
SW2
SW１

SW２

SW１

Flickering
点滅

SW１+SW２

F６

SW１

Flickering
点滅

Flickering
点滅

SW１

SW１

Flickering
点滅 SW１Flickering
点滅 SW１Flickering点滅*

Use SW2 to※SW２で点滅部
increment
インクリメント

flickering
portion.

警報出力
Alarm
output upper
上限流量
limit
flow-rate
SW１+SW２

SW２

SW１+SW２

F７

SW１

SW１

Alarm
judgment
警報判定値
value hysteresis
ヒステリシス幅
width

Flickering
点滅

SW１

Flickering
点滅

4 ４回
times

SW１

8 times
8回

SW１

100L/P

Flickering
点滅

Flickering
点滅*※SW２で点滅部
Use SW2 toincrement flickering
インクリメント
portion.

SW１+SW２
SW１

SW２

SW１

SW１

1616回
times

SW１

10L/P

SW１

3232回
times

SW１

6464回
times

SW１

1 time
1回

SW１+SW２

F８

Flow-rate moving
移動平均回数
averagenumber oftimes

SW１+SW２
SW２

SW１+SW２

F９

SW１

SW１
1000L/P

出力パルス
Output
pulse
単位
unit
SW１+SW２

SW２

SW１

SW１

Fig. 2-3 Flow of display changeover in settings mode (R) (1/3)

7SW１

2 times
2回出力パルス
Output
pulse
unit
単位

F９

SW２

SW１

One-shotpulse: 50 ms
ﾜﾝｼｮｯﾄﾊﾟﾙｽ：50ms

One-shotpulse: 100 ms One-shot
pulse: 125 ms One-shot
pulse: 250 ms ﾜﾝｼｮｯﾄﾊﾟﾙｽ：500ms
One-shot pulse: 500 ms
ﾜﾝｼｮｯﾄﾊﾟﾙｽ：125ms
ﾜﾝｼｮｯﾄﾊﾟﾙｽ：100ms
ﾜﾝｼｮｯﾄﾊﾟﾙｽ：250ms
SW１
SW１
SW１
SW１
SW１

SW１+SW２

duty

出力パルス
Outputpulse
selection
選択

F１０

SW１+SW２
SW１
SW２

SW１

No conversion
換算なし

Normalconversion
ノルマル換算SW１Standard conversion
SW１ スタンダード換算

SW１+SW２
Flow-rate
流量換算
conversion
有無選択
selection

F1１

SW１+SW２

SW１

SW1
SW１
(Standard(ｽﾀﾝﾀﾞｰﾄﾞ換算)
conversion)

SW２

SW１
(Otherthan standard(ｽﾀﾝﾀﾞｰﾄﾞ換算以外)
conversion)

Flickering
点滅

SW１

点滅
Flickering

点滅
Flickering

SW１

SW１+SW２
Standard
スタンダードconversion
換算温度
temperature

F１２*※SW２で点滅部
Use SW2 to increment
flickering portion.
インクリメント

SW１+SW２
SW２

SW2

SW２
(Standard(ｽﾀﾝﾀﾞｰﾄﾞ換算)
conversion)

SW１

SW１

SW１+SW２
SW２(Otherthan(ｽﾀﾝﾀﾞｰﾄﾞ換算以外)
standard
conversion)

Flickering
点滅 SW２

3 min
３分

SW１

60
min
60分

Air
空気

SW１

Nitrogen
窒素

SW１

Unlimited
無制限

SW１

Temperature
温度

Test
mode time
テストモードselection
時間選択

F１３

SW１+SW２
SW２

SW１

SW１
SW１+SW２

Kindof gas
ガス種

F１４

SW１+SW２
SW２

SW１

SW２

Flow-rate
流量

SW１+SW２

SW１

Pressure
圧力

Current
output
電流出力
correlating value

F１５

相関値

SW１+SW２
SW１
SW２

SW１

Flickering
点滅
SW１+SW２

F１６

SW１

Flickering
点滅

SW１

Flickering
点滅

ローフロー
Low
flow cutoff
カットオフ値*※F11「流量換算選択有無」にてDisplays the converted information as
selected in F11 “Flow rate conversion
選択した換算情報が表示される
selection.”

SW１+SW２
SW２

SW１

SW１

Flickering
点滅

SW１

Flickering
点滅

SW１

SW１+SW２

F１７*※SW２で点滅部
Use SW2 to increment flickering
portion.
インクリメント

Atmospheric pressure
使用環境のin the operating
environment
大気圧

Flickering
点滅

SW１

Flickering
点滅*※SW２で点滅部
Use SW2 to increment
flickering portion.
インクリメント

SW１+SW２
SW１

Fig. 2-4 Flow of display changeover in settings mode (R) (2/3)

8

F１７

Atmosphericpressure
使用環境のin the operating
圧力値
environment

SW２

SW１

With averaging
有り（10回）(10
times)

SW１

No averaging
無し（1回）(1 time)

SW１+SW２

F１８

圧力値
With
or withoutpressure
averaging
平均化有無
SW１+SW２
SW２
SW２

SW１

Flickering
点滅

SW１+SW２

SW１

Flickering
点滅

SW１

Flickering
点滅* ※SW２で点滅部
Use SW2 to increment
flickering portion.
インクリメントRTU address
ＲＴＵアドレス

F１９

SW１+SW２
SW１
SW２

SW１

9600bps

SW１

19200bps

SW１

38400bps

SW１57600bps

SW１115200bps

SW１+SW２
Bit rate
ビットレートselection
選択

F２０

SW１+SW２
SW２

SW１+SW２

F２１

SW１

SW１
１bit

SW１

２bit

Stop bit length
ストップビット長

SW１+SW２
SW２
SW２

SW１
SW１+SW２

Odd奇数
numberSW１

Even偶数
numberSW１

No parity
パリティ無しParity bit
パリティ
selection
ビット選択

F２２

SW１+SW２
SW２

SW１+SW２

F２３

SW１

SW１
Without
なし

SW１

With
あり

Terminal resistor

終端抵抗有無SW１+SW２
SW２

SW１

SW２
Not
to be cleared SW１
クリアしないToクリアする
be cleared

SW１+SW２

F００

Clear accumulated
積算値クリアvalues

SW１+SW２
SW２

SW２

SW１
Not
to be reset
リセットしない

SW１+SW２

FFF

SW１

To
be reset
リセットするパラメータ
Reset parameter
リセット
SW１+SW２

SW２

Fig. 2-5 Flow of display changeover in settings mode (R) (3/3)[Making settings via RS485 communication]
The settings above can be made via RS485 communication. (Except “F23: With orwithout RS485 terminator resistor”)
Make settings via RS485 communication under conditions where button operations
may be difficult, such as when the flow meter is used at heights. For details oncommunication, refer to the communication specifications, which can be downloaded
from our website.

92-3 Details of setting items[F1] DisplayOutput (selectable for B, D, R)
In the Displayoutput, select “Forward flow (d. F.)” measurement or “Forward/reverse
flow (d.r. F)” measurement.
 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.Analog output at the time of zeroflow-rate is 4 mA. (when [F15]: Instantaneous flow-rate is selected).
 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.Analog output at the time ofzero flow-rate is 12 mA. (when [F15]: Instantaneous flow-rate is selected).
[F2] Analog output FS flow-rate (selectable for B, D, R)
This function can set a full scale flow-rate value for current output (5 digits).
This setting takes effect when [F15] Current output correlation value is set to"Instantaneous flow-rate."
The FS flow-rate corresponds according to the setting of [F11] Flow-value conversion
selection.
[F3] State of contact output (selectable for B, D, R)
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 (selectable for B, D)
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 (B only), communication line
aberration, and elapse of 11 years.
[F5] Lower limit alarm flow-rate (selectable for B, D, R)*
Use this to set the lower limit alarm flow-rate (5 digits) as the lower limit flow-ratevalue for the upper/lower limit flow-rate alarm. The smallest digit, displayed in thelower row at the time of this setting, is not the 1st decimal place but is the 1st digit of
an integer. Setting after the decimal point cannot be done.
* For the built-in battery specification (B) and external power supply specification(D), this is the judgment value for flow-rate lower limit alarm output of open drain
output 2.
For the RS485 output specification (R), this is the judgment value for "Error
information and Flow-rate upper/lower limit aberrations Y/N" of flow meter
information of the RS485 communication function.
[F6] Upper limit alarm flow-rate (selectable for B, D, R)*
Use this to set the upper limit alarm flow-rate (5 digits) as the upper limit flow-ratevalue for the upper/lower limit flow-rate alarm. The smallest digit, displayed in thelower row at the time of this setting, is not the 1st decimal place but is the 1st digit of
an integer. Setting after the decimal point cannot be done.
* For the built-in battery specification (B) and external power supply specification(D), this is the judgment value for flow-rate upper limit alarm output of open drain
output 2.
For the RS485 output specification (R), this is the judgment value for "Error
information and Flow-rate upper/lower limit aberrations Y/N" of flow meter
information of the RS485 communication function.

10[F7] Alarm judgment value hysteresis width (selectable for B, D, R)*
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.
* For the built-in battery specification (B) and external power supply specification(D), this is the judgment value for flow-rate upper/lower limit alarm output ofopen drain output 2.
For the RS485 output specification (R), this is the judgment value for "Error
information and Flow-rate upper/lower limit aberrations Y/N" of flow meter
information of the RS485 communication function.
[F8] Flow-rate moving average number of times (selectable for B, D, R)
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 isapplied 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),” “8times (08),” “16 times (16),”“32 times (32),” and “64 times (64).”[F9] Output pulse unit (selectable for B, D, R)
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.
Table 2-2 Table of output pulse unit selections
Model

型式

One-shotpulse output
ﾜﾝｼｮｯﾄﾊﾟﾙｽ出力

duty出力
Pulse
Duty
outputconstant Actual Standard Normal
ﾊﾟﾙｽ flow
ｽﾀﾝ
定数 実流量rate
ﾉﾙﾏﾙ

Pulse ﾊﾟﾙｽON幅[ms]ON width [ms]Duringactual flow rate
実流量時

ﾀﾞｰﾄﾞ

50

100

125

250

500

Standard
conversion
ｽﾀﾝﾀﾞｰﾄﾞ換算

50

100

125

250

Normalconversion
ﾉﾙﾏﾙ換算

500

50

100

125

250

500

10
TRX25

100

○

1000
10
TRX32

100

○

1000
10
TRX40

100

○

1000
10
TRX50

100

○

1000
10
TRX65

100

○

1000
10
TRX80

100

○

1000

◯

Initialsettings at shipment
出荷時初期設定
Setting
設定可 available
Setting
not available
設定不可

11

[F10] Pulse output method (selectable for B, D, R)
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 theappropriate ON time from Table 2-2.

[F11] Flow-rate conversion selection (selectable for B, D, R)
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 “N,” 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.
3

Q2 [Nm /h]＝

273.15(273.15＋t)

×

P1 + Atmospheric pressure in the operating environment[kPa] [F17]P1 ＋使用環境の大気圧[kPa][F17]101.33× q1

3
Q
conversion flow-rate[Nm3/h]Q22: Normal：ノルマル換算流量[Nm /h]
t:t Measured
temperature [°C]
：測定温度[℃]
PP11: Measured
pressure [kPa]：測定圧力[kPa]33
qq11: Actual
flow-rate：実流量[m /h] [m /h]

3Q2 [Sm /h]＝

273.15＋T(273.15＋t)

×

P1 + Atmospheric pressure in the operating environment[kPa] [F17]P1 ＋使用環境の大気圧[kPa][F17]101.33

× q1

3/h]
Q
flow-rate [Sm3/h]
Q22: Standard：スタンダード流量[SmT Standard：スタンダード換算温度[℃][F12]T:conversion temperature [°C] [F12]t：測定温度[℃]t:P1Measured
temperature [°C]
：測定圧力[kPa]3
Pq11: Measured[kPa]：実流量[mpressure/h]q1: Actual flow-rate [m3/h][F12] Standard conversion temperature (selectable for B, D, R)
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 (selectable for B, D, R)
Test mode times available for selection are "3 min. (3)," "60 min. (60)," and "Unlimited(--)."[F14] Fluid selection (selectable for B, D, R)
Select either "Air (Air)" or "Nitrogen (N2)."
Even if you specified a flow meter for air in your initial order (Model: TRX [nominal
diameter] [power supply specification]-C/5P), you can change this setting so that it
can be used for nitrogen.

12

[F15] Current output correlation value (selectable for B, D, R)
Select "Instantaneous flow-rate (FLo)", "Pressure (PrS)", or "Temperature (tEP)" forthe 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.
[F16] Low flow cutoff flow-rate (selectable for B, D, R)
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 (selectable for B, D, R)
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 (selectable for B, D, R)
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.

[F19] thru [F23] are settings relating to RS485 communication. Make sure thesesettings match those on your master equipment. The settings cannot be madefor the external power supply specification (D) and the built-in battery
specification (B).
[F19] RTU address (selectable for R)
Select a value between 001 to 247 for RTU address of this meter.
[F20] RS485 communication bit rate (selectable for R)
Select "9600 bps (9600)", "19200 bps (19200)", "38400 bps (38400)", "57600 bps(57600)", or "115200 bps (115200)" for the communication bit rate.
[F21] RS485 communication stop bit length (selectable for R)
Select either "1 bit (1)" or "2 bits (2)" for the stop bit length.
[F22] RS485 communication parity bit (selectable for R)
Select either "None (--)", "Even number (En)", or "Odd number (Od)" for the parity bit.
[F23] With or without RS485 terminal resistor (selectable for R)
Select either "Yes (on)" or "No (OFF)" for the terminator resistor.
The meter's communication circuit comes with a built-in 100 ohm terminal resistor, so
you do not need to use an external resistor.
In configurations connecting multiple meters to a signal receiving device (masterdevice), set the terminator ON on the meter that is physically the farthest distance
away.

13

[F00] Reset of all of accumulated values (selectable for B, D, R)
By selecting "Clear (cLr)", the values for Accumulated flow volume (Forward flow),
Accumulated flow volume (Reverse flow), and Trip accumulated flow volume arereset to zero.
[FFF] Reset to standard factory delivery settings (selectable for B, D, R)
By selecting "Reset (SEt)", settings are reset to standard factory settings shown in
Table 2-1. 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.

14

3.

Installation
Reminders relating to installation and recommended piping conditions are described inparagraphs 1) thru 12) below.
Please read this section carefully as some conditions will render the meter incapable ofmaking correct measurements.
1)

Match the arrow on the meter with the forward flow direction of the fluid.

2)

Fig. 3-1 below shows the recommended lengths of straight pipe sections for themeter under different piping conditions.

Conditions
条件

90°90°
elbow ∙
Full-bore
エルボ
valve
・fullyopenedフルボア

Upstream
上流側

Downstream
下流側

Screw connection type (TRX25, 32): 20D or longer
ねじ込みタイプ（TRX25,32）：20D以上
Wafer
connection type (TRX40, 50, 65, 80): 10D or
longerウェハタイプ（TRX40,50,65,80）：10D以上

5D
or longer
5D以上

バルブ
全開

Merging合流

20 20D以上
D or longer
1010D以上
D or longer

20 20D以上
D or longer
5D
or longer
5D以上

Enlarge
拡大管
pipe

1010D以上
D or longer

10 10D以上
D or longer

Narrowing
縮小管
pipe

Fig. 3-1 Recommended straight pipe lengths 1 (D: gauge)

15

3)

Because ultrasonic noise can be produced inside the pipes if the meter is installednear a pressure reducing valve or flow control valve, make sure to comply with the"required straight pipe length L" shown in Fig. 3-2 below.
Be particularly careful of the fact that there are major constraints to installingthe flow meter downstream of a pressure reducing valve, etc. (The meter may
not be able to take measurements if conditions are not met).
ご使用最大流速(m/s)
Maximumworking flow-rate (m/s)
エルボ数

必要直管長Ｌ（mm）＝１０Ｄ＋差圧(kPa)×Ｄ×
Requiredstraight pipe length L (mm) = 10D + differential pressure (kPa) x D x×（0.8）
X (0.8) number of elbows

20 (m/s)２０（m/s）

減圧弁の下流に流量計を設置する場合
To install themeter downstream of a pressure reducing valve
With
elbow
ｴﾙﾎﾞあり(Elbows
attenuate ultrasonic noises. If multiple elbows are（ｴﾙﾎﾞで超音波ﾉｲｽﾞは減衰します。複数ヶある
used,the required length will be shorter.)
場合は必要長は短くなります）

Without
elbow
ｴﾙﾎﾞなし

P2

P1

P1

P2

Pressure

Pressure

reducing
減圧弁

reducing
減圧弁

valve

valve

Basically 10D
基本10D
Required必要直管長
straight pipe
lengthDistance from pressure
減圧弁～流量計
reducing
valve to the
flow
meter
までの距離

（計算例）
(Calculation
example)Example1: DN50A,流速10m/s
Flow-rate 10m/s,
No elbow used
例１：口径50A
ｴﾙﾎﾞ無し= 25kPa
and P2 = 5kPa
P1 Where
25kPaP1 P2
5kPaの時Distance 90°エルボ～
from 90° elbow to the flow meter
10D ※or longer
流量計までの距離（ ※ Screw connection type (TRX25, 32):
１０Ｄ以上
20D or longer）

500＋(25-5)×50×10／20=1000mm(20Ｄ）

Example2: DN50A,
Flow-rate 10m/s,
No elbow used
例2：口径50A
流速10m/s
ｴﾙﾎﾞ無しP1 =P2
160kPaand P2 = 10kPa
P1 Where
160kPa10kPaの時(Calculation example)（計算例）
Example1: DN50A, Flow-rate 10m/s, One elbow
例１：口径50A
流速10m/s ｴﾙﾎﾞ「1ヶ」
used
P1 = 160kPa
and P2 = 10kPa
P1Where160kPaP2 10kPaの時

500＋(160-10)×50×10／20=4250mm（85D）

500＋(160-10)×50×10／20×0.8＝3500mm (70D)

Installing the減圧弁の上流に流量計を設置する場合
flow meter at upstream of a pressure reducing valve

Pressure
reducing
減圧弁
valve

20D
or longer
20D以上

Fig. 3-2 Recommended straight pipe lengths 2 (D: gauge)(Installing the flow meter near a pressure reducing valve or a flow control valve)

16

4)

5)

6)

7)
8)

9)

When installing a wafer type flow
Centering collars
meter, make sure to align the
Gasketcentral axis of the meter with that ofthe piping. In order to make thedeviation of the central axes of theGasketflow meter and piping, use thecentering collars provided as anCentering collars
accessory. Insert the centeringcollars into the holes of the flange
packings and flanges as shown in
Fig. 3-3. The central axis of themeter can be aligned with that of thepiping by making the flow metercontact the collars. In situations
where it is difficult to install thecollars on both the up andFig. 3-3 Installation example of thedownstream sides of the meter due topiping misalignment or other reason,
centering collars
install them on only the upstream side.
This flow meter can be installed indoors or outdoors, and on either horizontal orvertical piping. Make sure that it is installed on a straight section of the pipe. The
flow meter is recommended to be installed on vertical piping if the air contains
significant amounts of mist, dust, or other material. Also, when installing the meter
horizontally on a similar pipe, make sure to install it so that the display area faces up.
This flow meter is not of a perfect waterproof structure (IP64). Do not install it at aplace that may be submerged in water.
The installation of a sunshade is recommended if the flow meter is exposed todirect sunlight.
If it will be installed in an area where it can be exposed to falling rain, make sure to
install the meter so that its display area does not face down.
Fasten wafer type flow meters using M16 stud bolts, etc., on both sides.
(Refer to Fig. 3-3.) When tightening the bolts and nuts, tighten evenly to prevent
partial tightening.
With wafer type flow meters, make sure that the flange packings do not protrude
into the interior of the pipes.
With screw connection type flow meters, screw on the tapered threads for piping
using the torques shown below.
TRX25A (R1): 36 to 38Nm
TRX32A (R1-1/4): 47 to 49Nm
The display portion can be rotated to change its
orientation. Do this before installing the meter isrecommended.
To change the display's orientation, loosen the set
screw at the neck portion of the display using an M4
hex wrench and then rotate the display portion.
Delivered state
Once it is in the desired orientation, always makesure to tighten the set screw to fix the display
portion in place. When rotating the display section,
do not apply a force in a direction other than therotating direction.
The display portion can be rotated clockwise by 90 degrees and counter clockwise
by 180 degrees from the orientation it was in when it left the factory.

1710) When making piping connections, make sure that foreign material such as weld
chips, debris, and sealant do not make their way into the pipes. In the case of new
piping, install the product after sufficient cleaning of the pipe(s).
11) Do not install the flow meter in sections where it will be subjected to significant
compression forces, tensile loads, and other loads after it is installed.
12) When making piping connections, make sure not to touch the interior of the meter,
particularly its ultrasonic sensors (See p.1). Also make sure not to drop the meter,
hit it against other objects, or otherwise subject it to excessive shocks.
Do not hold the display section of this flow meter.

18

Wiring connection
Be sure to perform the wiring work in a state that power supply from the external
power supply is interrupted.
The input/output circuit diagram is shown in Fig. 4-1 to Fig. 4-3.
Make wiring connections using the exclusive external connection cable.

Red(24V DC)赤Main circuit(Opendrain output 2)
Yellow(オープンドレイン出力2）黄(Opendrain output 1)
White(オープンドレイン出力1）白

主
回
路

+
-

(GND)
Black
(GND）黒(4
to 20mA
output) ※1
Green *1
(4-20mA
出力)緑(Communication)
Brown
(通信)茶

*1
resistance
400 ohms or smaller※１Load
負荷抵抗
400Ω以下Fig. 4-1 Input/output circuit diagram (external power supply specification: D)(RS485 +)茶Brown(RS485 -)黄Yellow(24V DC)赤
Red

Black
(GND）黒+-(4-20mA
output) ※１
Green *1
(4-20mA 出力)緑主回路

Main circuit

4.

(Open
drain output) White(オープンドレイン出力)白*1
Load
resistance
400 ohms or smaller※１
負荷抵抗400Ω以下Fig. 4-2 Input/output circuit diagram (RS485 output specification: R)

19

(オープンドレイン出力2）黄(Opendrain output 2) Yellow

Main circuit(Opendrain output 1) White(オープンドレイン出力1)白主回路(GND）黒(GND)
Black(4(4-20mA出力(+))赤to 20mA output (+)) ※1
Red *1+ DC24V

D/A(4 to
20mA output (-)) Green(4-20mA出力(-))緑※1 *1- ±10％(Communication
input) Brown(通信入力)茶*1
output requires an additional power supply (24 VDC).
※1Analog
アナログ出力させるには、別途電源（24VDC）が必要です。
Loadresistance
400 ohms or smaller
負荷抵抗400Ω以下Fig. 4-3 Input/output circuit diagram (built-in battery specification: B)[Reminders regarding power supply and ground]
The meter's enclosure (metal components) and GND are electricallyshared.
Ground the power supply to negative. (Do not ground it to positive)Or, select an isolated power supply.
If it is installed near the electric noise source, ground the braided shield of theexternal connection cable.
Select a power supply with more than sufficient power supplying capacity.
1.5W or greater is recommended.

[Wiring distance]In case of connecting an extension cable to the external connection cable, use

6-core cable of UL style20276-SB AWG26×6C(2) or higher grade.
As for pulse and analogue outputs, with UL style20276-SB AWG26×6C(2),

detecting of the output signal up to 100m was confirmed at our test facility.
As for RS485 communication, with UL style20276-SB AWG26×6C(2),detecting of the output signal up to 270m was confirmed at our test facility.

20[Reminders regarding connection with indicators (RS485 output specification: R)]
RS485(+)茶Brown

Signal受信器
receiver

RS485(-)黄
Yellow
Power
電源 supply(Red)
ＤＣ２４Ｖ（赤）(Black)ＧＮＤ（黒）

TRX#2

TRX#1

・・・ TRX#4

Fig. 4-4 Signal receiver and connections (RS485 output specification: R)







Do not ground the brown and yellow communication lines.
If multiple meters are to be connected as shown in Fig. 4-4, choose a power
supply with more than sufficient power supply capacity. A rough guideline
would be 1.5W multiplied by the number of units connected.
If multiple meters are to be connected, designate unique RTU addresses (001to 247) to avoid address conflicts.
Activate the 100 ohm terminator resistor between communication lines only on
the meter that is physically the farthest away from the signal receiver. In Fig.
4-4, (TRX#4) would be the applicable one.
Take into account any corruption* in the communication waveform when
determining the number of meters to connect and the bit rate.
*Corruption which results from cable line resistance and line capacity.
Connecting the communication line in +/- reverse will not destroy thecommunication circuit. But you will not be able to establish communication.
Please connect it correctly.

[Reminders regarding connection with indicators (external power supply specification:D, built-in battery specification: B)](Opendrain output 2) Yellow(オープンドレイン出力2）黄TR101A
受信器(Communication
input) Brown(通信入力)茶(GND)BlackPower supply
電源(Not required(Bタイプ時for
B type)(24V DC)Red

は不要）

(24V

TRX

Red
DC)赤

(GND）黒(GND)Black

Fig. 4-5 Signal receiver and connections (external power supply specification: D,
Signalbuilt-in battery specification: B)
receiverMake a one-to-one connection between TRX and an indicator. (Multiple units
cannot be connected.)
If you perform continuous communications with the built-in battery
specification (B), the battery life may become shorter. Perform communication
at intervals of 10 minutes or longer.

21[Reminders regarding 4-20mA outputs (external power supply specification: D, 2: R)]
Analogoutput (Green)
アナログ出力（緑）
PLC,
etc.
ＰＬＣ等
(Black)ＧＮＤ（黒）

Power
電源
supply(Black)GND（黒）(Red)
DC24V(赤）TRX

Fig. 4-6 Connection with PLC (external power supply specification: D, RS485
output specification: R)
Do not ground the 4-20mA output terminal (green). You will not be able tocorrectly measure output current.
Use a load resistance of no greater than 400 ohms. Connecting a load greaterthan 400 ohms will cause a drop in voltage and it will not be able to output the
specified current.

[Reminders regarding 4-20mA outputs (built-in battery specification)](4-20mA
output (+))
(4-20mA出力(+))
Red
赤

DC24V
DC24V
±10％

GND

TRX

PLC,
etc.
PLC等

(4-20mA出力(-))(4-20mA
output (-))
Green
緑

SG
(GND）黒
Black

Fig. 4-7 Connection with PLC (built-in battery specification: B)To use analog output, an additional external power supply (24 VDC±10%) is
required.

The meter's enclosure (metal components) and GND are electrically shared.
When continuity occurs between the enclosure (metal pipe) and the ground of
an external power supply, current will not be output correctly. Insulate theenclosure (metal pipe) and the ground of the power supply.



Use a load resistance of no greater than 400 ohms. Connecting a load greaterthan 400 ohms will cause a drop in voltage and it will not be able to output the
specified current.

22[Reminders on open drain outputs](Selecting the type of pulse output)
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(35%~65%). Under one-shot output you
can set the ON times shorter between 50 to 500ms (Fig. 4-8). Therefore, if you areusing 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 tochoose the appropriate ON time.



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

One-shot
outputﾜﾝｼｮｯﾄ出力

ON

OFF
Duty
dutyoutput
出力

ON
1000L

1000L

Fig. 4-8 Characteristics of 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]

23

5.

Operation
Do not open or close valves abruptly. Make sure to open and close them gradually.
Opening or closing of the valve all at once may cause a failure of the flow meter if apressure difference is occurring between the upstream side and downstream side of thevalve.
When you are running the meter for the first time, check that the pilot lamp is flickering.
(A flickering pilot lamp indicates that the fluid is flowing.)

Fig. 5-1 display start of operation.

6.

Display and output under aberrant states
1)

Aberration in flow measurement[State] Unable to receive ultrasonic signals.
[Display] The triangle in the upper left of the LCD flickers.
The instantaneous flow-rate value in the sub-display shows "0.00."
As for the accumulated flow volume value display, the accumulation process is
stopped and the display shows the value immediately prior to the aberration.
[Output] Analog output: 4mA
Open drain output: Stopped[Cause] There is a possibility that foreign materials (liquids such as oils) has
become stuck to or is being retained in the measurement pipe, and isobstructing the propagation of ultrasonic.
If the alarm persists even after removing the foreign materials, pleasecontact your nearest Aichi Tokei Denki branch or sales office.

Fig. 6-1 Flow measurement aberration display(Note) Actions when the meter is first run
Once the flow meter is installed and measurements begin, the meter may show a"flow measurement aberration display" due to the sudden change in pressure
from the atmospheric pressure. This will stop once the pressure of the fluid
stabilizes under working conditions. (This will return to normal.)

24

2)

Aberrant pressure value[State] This state indicates that the pressure value has exceeded themeasurement limits*.（*-75kPa< pressure or pressure >＋1075kPa）[Display] The pressure display in the sub-display shows the aberrant value andflickers.
The instantaneous flow-rate value in the sub-display shows "0.00" and flickers.
(The display of temperature value flashes)
As for the accumulated flow volume value in the main display, the accumulation
process stops and the display shows the value immediately prior to the aberration.
[Output] Analog output: 4mA
Open drain output: Stopped[Cause] The pressure used may have exceeded the specified range.
Other potential causes include pressure sensor failure, please contact
your nearest Aichi Tokei Denki branch or sales office.

At the display of accumulated flow volume (forward flow),
trip accumulated flow volume, and accumulated flow
volume (reverse flow) displays
Fig. 6-2 Pressure aberration displays
3)

At the display of theinstantaneous flow- rate
display (L/min)

Aberrant temperature value[State] This state indicates that the temperature value has exceeded themeasurement limits*.（*-20℃< temperature or temperature >＋70℃）[Display] The temperature display in the sub-display shows the aberrant value andflickers.
The instantaneous flow-rate value in the sub-display shows "0.00" and flickers.
(The display of pressure value flashes)
As for the accumulated flow volume value in the main display, the accumulation
process stops and the display shows the value immediately prior to theaberration.
[Output] Analog output: 4mA
Open drain output: Stopped[Cause] The aberrant temperature alarm may be triggered if setting of Fluid
selection [F14] does not match the fluid being measured. If the setting iscorrect and you are still getting an aberrant temperature alarm, pleasecontact your nearest Aichi Tokei Denki branch or sales office.

At the display of accumulated flow volume (forward flow), trip
accumulated flow volume, and accumulated flow volume(reverse flow) displays
Fig. 6-3 Temperature aberration displays

25

At the display of theinstantaneous flow- rate
display (L/min)4)

Memory aberration[State] There is an aberration in the data in the non-volatile memory.
[1] User's area:
An aberration is found in the data for settings that werechanged by button operations, or in the accumulated value
data upon powering the meter on.
[2] System area:
An aberration is found in the data for the system (settingby users is not available).
[Display][1] User's area:

The triangle that indicates the Kind of Gas (air or
nitrogen) flickers.
[2] System area:
The display shows "E-2."[Output] [1] User's area:
Analog output: Normal operations
Open drain output: Normal operations[2] System area:
Analog output: 4mA
Open drain output: Stopped[Cause] [1] In the case of a memory aberration in the user’s area
Check to see whether the set data is within the settable range.
(Refer to Table 2-1.)

If any aberrations are found with the set data, you can reset themusing "[FFF] Reset to standard factory delivery settings." (*)

If any aberrations are found with the accumulated value data,
perform "[F00] Reset of all of accumulated values" and power themeter back on. (*)*Please note that this resets your settings data or accumulated value.
[2] In the case of a memory aberration in the system area
Please contact your nearest Aichi Tokei Denki branch or sales office.

[1] User’s area

[2] System area

Fig. 6-4 Memory aberration display
Table 6-1 Output and communication at aberrations
Measurement aberration
Pressure aberration
Temperature aberration
Memory aberration (User
area)
Memory aberration(System area)

Analog output
4mA
4mA
4mA
Normaloperations
4mA

Open drain output
Stop
Stop
Stop
Normal operations

Communication
Available
Available
Available
Available*

Stop

Not available* Communication is not to be available if there is an aberration in the RS485
settings.

265) Low battery voltage aberration [For the specification B only]① Aberration indication ① (Flickering of the second ▲ from the upper left of themain display) will be indicated after 11 years from the installation of the battery. Even
though Aberration indication ① is indicated, measurement is done until the time
Aberration indication ② is indicated.
② Whereas battery voltage is monitored once a minute, aberration indication ②(Flickering of the accumulated flow volume value at the interval of 0.5 seconds) is to be
indicated, as the indication of run-out of battery, when battery voltage is lower than thesensing voltage (2.51 – 2.54V) for 10 continuous times by the monitoring. Measurement
is to be stopped.

Flickering
Flickering

Aberration indication①
Aberration indication②
Fig. 6-5 LCD display (Low battery voltage aberration)

27

7.

Operation modes
This flow meter comes with 3 operation modes between which mode transition can be
operated by using buttons.
(Table 7-1, Fig. 7-1)
Table 7-1 Button operations for each operation mode

Button position and operation
ButtonOperation
position
Left rear

Switchover among accumulated flow volume (forward flow), trip
accumulated flow volume, and instantaneous flow-rate [L/min]
Switchover among accumulated flow volume (forward flow), accumulated
flow volume (reverse flow), and instantaneous flow-rates [L/min]
Switchover among instantaneous flow-rate [m3/h], pressure, andtemperature displays

SW1
SW2

Right rear

Center rear

Measuring modes

SW2(Pressdown for 3
sec.)
SW3

Switchover to settings mode

SW1+ SW2

Clear trip accumulated flow volume

Settings mode
Select setting
Select setting
item
value
Switchover of
Switchover to thesetting contents,
next setting item
Moving place offlickering digit
Switchover toprevious setting
item

Switchover to test mode

Change thevalue offlickering digit

Test mode

Switchover tomeasuring mode

Switchover to measuring mode
Switchover between selecting thesetting item and selecting the set value

Note 1) "SW1+SW2" denotes steps where both switches must be pressed simultaneously.
Note 2) You cannot switch over the sub-display when the main display is set to instantaneous flow-rate[L/min]メイ ン表示（正流表示モード）
Main
display (Forward flow display mode) S W1+SW2/ Clearﾄﾘtrip
ｯﾌﾟ積算ｸﾘｱ
accumulated flow volume

Measuring modes

Accumulated flow
正積算
流 量 flow)
volume(Forward

計
測
モ
|
ド

S W1

Trip accumulated flow
ト リ ッ プ積 算流量
volumeS W1

Switchover using
設settings
定 モード[modeF1]で切[F1]換Instantaneous[L/min]flow-rate[L/min]

瞬時流量

Maindisplay (Forward flow display mode)
メ イン表示（正逆流表示モード）
Accumulated flow
正 積 算(Forward
流 量 flow)
volumeS W1Accumulated
flow rate
逆 積 算流 量(Reverse flow)

S W1

S W1

Instantaneous
flow-rate
瞬
時 流量[L/min][L/min]S W1

Sub-display (When main display displays Accumulated flow volume (Forward flow), Trip
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）
accumulated
flow volume, or Accumulated flow volume (Reverse flow))
Instantaneous flow S W2
S W2
Pressure
瞬時流量
圧力
温度
Temperaturerate

Sub-display(main display) under instantaneous[L/min]） flow-rate [L/min]
サブ 表示（メイン表示：瞬時流量の場合

ブ Blank
ラ ンク

1 minminuteOneelapses.
経過
S W2oorr 1minSW2
one 経過minute elapses.

S W3

S W3 oror3minSW3three無操作
minutes ofinaction.

Transition to settings mode
設定モードへ遷移

sec.)
or test
SWSW22(3s)(3orテストモード
mode time ended.
時間終了

SW2 ( 3s)to test mode
テスTransition
トモードへ遷移Fig. 7-1 Transitions to each operation modeThis section describes the three operation modes.
1) Measurement mode
[Overview]
This mode is for measuring flow-rate, pressure, and temperature. The meter willremain in this mode unless you operate any of its buttons.
[Details]
The main display (upper column) displays the accumulated flow volume, and the
sub-display (lower column) shows the instantaneous flow-rate.

Fig. 7-2 Example of measuring mode indication28

A

Switchover of the main display
Where forward flow is selected in [F1: Display・output].
• Each time SW1 is pressed, the display will cycle from trip accumulated
flow volume to instantaneous flow-rate [L/min] and then to accumulated
flow volume (forward flow).

Accumulated flow volume

Trip accumulated flow volume

Instantaneous flow-rate(Forward flow) display

display[L/min] display

Fig. 7-3 Examples of different displays on the main display (where forward
flow is selected)

By pressing SW1 and SW2 simultaneously while trip accumulated flow
volume is displayed, trip accumulated flow volume can be canceled.
If the trip accumulated flow volume overflows beyond 9999999.9, thedisplay will show 0000000.0 without zero suppression and continue its
accumulation operations.

No overflow
Overflowed
Fig. 7-4 Trip accumulated flow volume display (example)
Where forward/reverse flow is selected in [F1: Display・output]:• Each time SW1 is pressed, the display will cycle from accumulated flow
volume (Reverse flow) to instantaneous flow-rate [L/min] and then toaccumulated flow volume (forward flow).

Accumulated flow volume

Accumulated flow volume

Instantaneous flow-rate(Forward flow) display(Reverse flow) display[L/min] display

Fig. 7-5 Main display (where forward/reverse flow is selected)

29

B

Switchover of the sub-display
Where the main display shows accumulated flow volume (Forward flow), trip
accumulated flow volume, or accumulated flow volume (Reverse flow):
Each time SW2 is pressed, the display will cycle from Pressure to
Temperature and then to instantaneous flow-rate. One minute after pressureor temperature is displayed, the display will automatically transition to theinstantaneous flow-rate display.
Where the main display shows instantaneous flow-rate (L/min):Only the unit is displayed.

2)

Settings mode
[Overview]
This mode allows you to set up your flow meter using button operations.
[Details]
See 2. Settings.

3)

Test mode[Overview]
This mode allows you to perform a simplified pipe leakage test by temporarily
canceling the low flow cutoff.
[Details][1] Please use this mode under conditions where there is no flow. You cantransition to test mode by pressing SW2 for 3 seconds in measuring mode,and this will allow you to measure very small flow-rates.
[2] While in the test mode, the unit in the sub-display (m3/h, kPa, ºC, or
L/min) will flash in 0.5 second intervals.
[3] You can select test mode times of either 3 minutes, 60 minutes, or
unlimited using the setting mode [F13]. The mode will transition tomeasuring mode once the set time elapses or by pressing SW2 for 3
seconds or longer in test mode.
[4] If the flow-rate value in the instantaneous flow-rate display is +0.1 orlarger, there is a possibility* of a leakage downstream of the meter.
[5] If the flow-rate value in the instantaneous flow rate display is -0.1 orsmaller, there is a possibility* of a leakage upstream of the meter.
*Possibility: Please note that this is strictly a possibility as the displayed
value also accounts for zero flow-rate offset, internal convection and otherfactors.
[6] The instantaneous flow-rate display in test mode is rounded to the second
decimal point.
Examples) Display: 0.00 [Nm3/h] Actual: 0 to 0.004 [Nm3/h]
Display: -0.00 [Nm3/h] Actual: -0.004 to 0 [Nm3/h]

30

8.

Processes during power outages (external
specification: D, RS485 output specification: R)
1)

power

supplyPower outage detection
The meter determines a drop in power supply voltage to 18±1.1V or lower as a
power outage, and performs the following operations:
Save the accumulated flow volumes.


2)Terminate measuring and output operations.
Turn off the LCD display.

Recovering from a power outage
The meter performs the following operations once the power supply voltage
recovers to 18.8±1.1V or greater:
LCD display turns on.
Resumes measuring and output operations (Measurements are resumed
using the accumulated flow volumes that was saved at the time the power
outage was detected.)

31

9.

Specifications
External power supply specification

Model

Power
supplyConversion

Built-in battery specification
RS485 output specification
Nominal diameter

TRX25D-C(N)/5P TRX32D-C(N)/5P TRX40D-C(N)/5P TRX50D-C(N)/5P TRX65D-C(N)/5P TRX80D-C(N)/5P
TRX25B-C(N)/5P TRX32B-C(N)/5P TRX40B-C(N)/5P TRX50B-C(N)/5P TRX65B-C(N)/5P TRX80B-C(N)/5P
TRX25R-C(N)/5P TRX32R-C(N)/5P TRX40R-C(N)/5P TRX50R-C(N)/5P TRX65R-C(N)/5P TRX80R-C(N)/5P
25A
32A
40A
50A
65A
80A

External power supply specification

RS485 output specification
Built-in battery specification
Fluid to measure
Normal conversion
Standard conversion

Fluid temperature and humidity
Operating pressure
Qmax
Normal
1/10Qmaxflow-rate(Nm3/h)Qmin*Note2Qcut

24VDC±10%, Power consumption 1.5W or lessLithium battery Battery life 10 years (at an ambient temperature of 20°C)
Air (primarily factory-supplied air), or nitrogen (The setting can be changed on the site.)
Flow-rate at 0°C and 1 atmospheric pressure obtained by converting actual flow rate
Flow rate converting from actual flow rate at the specified temperature (set to the flow meter)and
1atmospheric pressure.
-10 to 60°C, 90%RH or less
0MPa to less than 1MPa (Gauge pressure)*Note1
260.0
480.0
600.0
1100.01800.0
26.0
48.0
60.0
110.0
180.0
4.3
8
10.0
18.3
30.0
0.7
1.5
1.5
2.9
4.4

2200.0
220.0
36.7
5.9

Accuracy *Note3

LCD (with unit, measured fluid, and aberration displays)*Aberration display: flow-rate measurement aberration, pressure aberration, temperature aberration, communication
circuit aberration, external memory aberration, battery voltage reduction (built-in battery specification), timing of flow
meter replacement (built-in battery specification)
Accumulated flow volume: 00000000.0 [m3 (normal)] Nine digits
Forward flow
Display
Trip accumulated flow volume: 0000000.0 [m3 (normal)] Eight digits
display mode(switchover Main Display
Instantaneous flow-rate: 00000.00 [L/min (normal)] Seven digits
with*Note 4
Accumulated flow volume: 00000000.0 [m3 (normal)] Nine digits
Forward/reverse
buttons)
flow display
Accumulated flow volume (reverse flow): -0000000.0 [m3 (normal)] Eight digits
mode
Instantaneous flow-rate: 00000.00 [L/min (normal)] Seven digits
Instantaneous flow-rate [m3/h (normal)]: 000.00 (smaller than 1000) Five digits, 00000 (10000 or larger) Five digits
Sub-display*Note 1 Pressure (kPa): 0000.0 Five digits, Temperature (°C): 00.0 Three digits
Reset function
Reset of all accumulated values, reset to standard factory delivery settings (resettable on the site)
4-20mA (±0.1mA), load resistance 400 ohms or smaller, upper limit output current 22mA
Selected from instantaneous flow-rate, pressure, and temperature. (The setting can be changed on the site.) Note)
For the built-in battery specification, an additional power supply (24VDC±10%) is required.
Current output
Output range (4-20mA): Instantaneous flow-rate [m3/h (normal)] 0-□□□□□ (forward flow display mode),-□□□□□-□□□□□ (forward/reverse flow display mode) □□□□□ represents a value that is set with buttons.
Pressure: 0 to 1000kPa, Temperature: -10 to 65°C (fixed value)
Output 1 Unit pulse (forward flow)
Output is selected with buttons from unit pulse (reverse flow), flow-rate upper/lower limit alarm, main unit aberration,
Output 2
and electronic statement.
Nch open drain output 2 channels: maximum load: 24VDC, 50mA
CommonOutput mode: Duty (35 to 65%, maximum frequency: 10Hz)
OutputspecificaOr one shot (ON time: Selected from 50, 100, 125, 250, 500ms) *Note 5) (The setting can be changed on the site.)
tions
Pulse output unit 100L(normal)/P, 1000L(normal)/P *Note 4
Current output Same with the external power supply specification and the built-in battery specification
Unit pulse (forward flow)
Nch open drain output 1 channel: maximum load: 24VDC, 50mA
Output 1 Output mode: Duty (35 to 65%, maximum frequency: 10Hz) or one shot (ON time: Selected from 50, 100, 125, 250,
500ms *Note 5) (The setting can be changed on the site.)
Pulse output unit 100L(normal)/P, 1000L(normal)/P *Note 4
Communication 1 channel: Compliant with RS485 Modbus/RTU*Note 6
Communication bit rate: Selected with buttons from 9600, 19200, 38400, 57600, 115200bps.
Connection
Rc1
Rc1-1/4
Wafer (tightened between JIS10K flanges)
Installation orientation
Horizontal (LCD display faces upward), or vertical
Gas touching materials
Aluminum alloy, PPS, fluorosilicone rubber, etc.
Weight*Note 7
1.5kg(1.7kg)
1.4kg(1.6kg)
1.0kg(1.1kg)
1.2kg(1.3kg)
1.4kg(1.6kg)
1.7kg(1.8kg)
Installation location
Indoor, outdoor (protection grade compliant with IP64)
Storage temperature-20 to 70°C, non-condensing
OthersCE marking, UKCA marking, RoHS Directive compliant
Contact output

Contact
output

RS485 output
specification

External power supply
specification
Built-in battery specification

Type*Note 1) For 5kPa or less, the LCD display shows it as 0kPa. However, for RS485 communication, pressure between 0-5kPa is shown as it
is.
*Note 2)This is normal flow-rate indicated under the condition of 20℃ as the temperature and 700kPa as the pressure.
*Note 3)At our shipping test facility.
*Note 4) With the setting of actual flow-rate measurement, the number of digits of accumulated flow volume display, the number of digits of
instantaneous flow-rate display, and the unit of pulse output are different.
*Note 5) Some units cannot be selected depending on the nominal diameter. Refer to Table 2-2 Table of output pulse unit selections on
page 11.
*Note 6) The communication specifications can be downloaded from our product website.
*Note 7)For the built-in battery specification, refer to the description in ().
*Piping conditions: 25A/32A: 20D or longer on the upstream side, 5D or longer on the downstream side (20D or longer for both the
upstream and downstream sides when using the product in forward/reverse flow display mode)
40A or larger: 10D or longer on the upstream side, 5D or longer on the downstream side (10D or longer for both the
upstream and downstream sides when using the product in forward/reverse flow display mode)
For details, please contact our branch/sales office.

32

Table 9-1 Normal flow-rate conversion values (Nm3/h) [Conversion examples]

TRX25

TRX32

TRX40

TRX50

TRX65

TRX80

Pressure(MPa)
Temperature(ºC)

0 (atmosphericpressure)
0

30

0

30

0

30

0

30

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

0.5

33

0.7

0.98

10. Dimension drawing

Screwねじ込みタイプ
connection type

ウェハタイプWafer
connection typeFig. 10-1 Dimension drawing

Unit: mmNominaldiameter
25A
32A
40A
50A
65A
80A

W

H

D

147

162

80

147

162

80

76

163

81

90

176

96

108

197

117

117

220

126

34

Connection withpiping
Screw

Wafer

11. Troubleshooting
If you encounter any problems that cannot be resolved by taking the steps described
below, please contact your nearest Aichi Tokei Denki branch or sales office.
Phenomenon

Possible cause

Remedial action

Check to see that the kind of gas (air or
nitrogen) indicator does not light at the
Even operating the
Attempting to set a value that is outside time of settings mode. If this indicator
Settings
buttons, unable to set a
the range of settable values.
lights, this is indication of attempting tosettings value.
set a value outside the range of settablevalues.
Using a fluid other than air or nitrogen.
Using the meter outside its range of
The measurement
aberration indicator lights. specifications (such as for installation
conditions, pressure, temperature).
Check all reminders regarding
Foreign material is attached to thespecifications and installation.
interior of the measurement pipe orultrasonic sensors.
▲
There is a major source of electricalnoise near the flow meter.
Check to see if the partition line
Installation
between the main and sub-displays isflickering.
It starts up but does not
Carrying out adjustments due to
If it is, it means that the meter isstart accumulationpressure fluctuations.
undergoing adjustments for pressure
immediately.
fluctuations. This should typicallycomplete in about 1 minute after whichaccumulation should begin.
The instantaneous
The direction of the fluid flow and the
Check to see that the arrow on theflow-rate shows a negative flow direction of the meter are opposite surface of the flow meter is pointing invalue.
of each other.
the direction of the fluid flow.
Unable to establish
The communication cable is connected
Connect the cable correctly.
communication.
in +/- reverse.
The pull-up resistor is too large.
Check the signal receiver's specified
ON current
and select an appropriate pull-up
The pull-up resistor is too small.
resistor.
Pulses are counted
incorrectly.
Make sure to set the one-shot pulse ON
The one-shot pulse ON time is equal totime sufficiently large enough for theor smaller than the signal receiver's
signal receiver's minimum input signal
minimum input signal width.
width.
A load resistor of 400 ohms or greater Use a load resistance of no greater thanhas been connected.
400 ohms.
The current value of the
Wiring
4-20mA output is too small. The setting value for the analog output Set an appropriate analog output FS
connection
FS flow-rate is too large.
flow-rate [F2] to suit your needs.
Adjust the intervals to the
The communication intervals are short communication specification of the(The communication bit rate is high).
connected receiving
device.
Maximum number of units that can be
Unable to establish
connected
communication.
The maximum number of units that can 115200 bps: up to 8 units
be connected is exceeded.
9600 to 57600 bps: up to 31 units*For details, refer to the communication
specifications.
The receiver that is used cannot receive Connect a receiver that can receive
RS485 communication.
RS485 signals.

35

Reference
page

10

5
18
24
31

15
21

23

23

22
10

4

31

Phenomenon

Possible cause

Remedial action

Check to see that the operating pressure
falls between 0 to 1MPa (Gaugepressure).
Contact your nearest Aichi Tokei Denki
Pressure sensor failure
branch or sales office.
Check to see that the operating
The operating temperature range hastemperature falls between -20ºC and
Sub-display flickers
been exceeded.
70ºC.
(temperature andinstantaneous flow- rate) Gas other than air or nitrogen is being Do not use gases other than air orused.
nitrogen.
The pressure fluctuates frequently.
This is normal.
The instantaneous
This is normal. Installation of the meter
flow-rate appears to be
A pressure governor is installed near the farther away from the pressure governor
fluctuating.
flow meter.
is recommended to take accurate
measurements.
The fluid is convecting in the pipe.
This is normal.
The instantaneous
flow-rate does not fall to
Check to see that the value unit on the
Test mode is on.
zero even there is no flow.
sub-display is not flickering.
Please make sure to properly install
The straight section of the pipe is notstraight pipe sections up andlong enough.
downstream of the meter to suit your
The instantaneous
After
specific piping conditions.
flow-rate is too large.
start
Check to see that the correct value unit
It shows the normal flow rate display.
operation
for the application is used.
The instantaneous flow
Use the meter within the scope of its
rate does not seem to
There is excessive flow rate.
specifications.
change.
Please make sure to properly install
The straight section of the pipe is notstraight pipe sections up andlong enough.
downstream of the meter to suit your
The instantaneous flow
specific piping conditions.
rate is too small.
Check to see that the correct value unit
The display shows the Actual flow-rate.
for the application is used.
If it is, it means that the meter isundergoing adjustments for pressure
fluctuations. This should typically
The partition line isCarrying out adjustments due tocomplete in about 1 minute.
flickering.
pressure fluctuations.
(The partition line may also flicker
momentarily during other actions, suchas when a valve is opened or closed)This is normal.
There is no "0" displayed in
Refer to the page indicated to the right to
The display is set to trip accumulated
the upper most digit of therevert to accumulated flow volume
flow volume display.
Accumulated flow volume.
(forward flow) or accumulated flow
volume (reverse flow) display.
Sub-display flickers(pressure andinstantaneous flow-rate)

The working pressure range has been
exceeded.

36

Reference
page
25
31

25
31
5
31

16

29
15
16
10
31
31

15
16
10
32

27

 Warranty and after-sale service
1)

Warranty period
For the period of one year after purchase, in case of a failure that is explicitly
attributable to our manufacturing process, we exchange the product for free.

2)

Scope of warranty
The followings are not included in the scope of warranty.


Failure caused by force majeure, such as natural disaster, etc.
Disassembly or alteration of the product.



Failure caused by mishandling.
Failure caused by use in excess of the scope of the specifications

(environment, etc.)
Other cases determined to be not attributable to our responsibility

The warranty here means the warranty for our product alone and does not coverdamages (damage(s) to other properties than our product, lost profits, opportunity
losses, etc.) caused to you by a failure of our product.
3)

Requesting for service
Regardless of whether or not your warrantee has expired, please contact nearest
our branch or sales office with the product name, model (TRX [nominal diameter][power supply specification]-[kind of gas]/5P), construction work number, serial
number, any options if used, and a detailed description of the failure.

4)
Warning

Precautions for long-term use[Designed standard operating period] 10 years
The designed standard operating period is the standard period for which the
product can be used after installation without a safety issue arising from ageing
degradation based on the standard conditions (ambient temperature 20°C, ambient
humidity 65%RH).
When the product is used past the designed standard operating period, safetyissues of the product itself may arise, such as deterioration of the waterproof anddustproof properties due to ageing degradation, smoking from, ignition of, or
electric shock from the product.
When the designed standard operating period has passed, carefully check for
abnormalities with the product when you use it, and consider replacement.
The designed standard operating period is different from the warranty period. The
designed standard operating period does not warrant that no general failures would
occur.

37

Ver. 102023.7