Ultrasonic Flow Meter for Air
Operation Manual

ATZTA TRZ-[Nominal Diameter][Power Supply Specification]-C/5P

Ultrasonic Flow Meter for Air(ATZTA TRZ[Nominal Diameter] [Power Supply
Specification]-C/5P)
Operation Manual
Table of contents
 Preface/Request
 Outline of product Important notice For safe and proper use

1.

Introduction...................................................................................................................... 1
1-1. Confirmation of package contents ........................................................................... 1
1-2.
1-3.

2.

Name of each part ................................................................................................... 1
Flow of operation start ............................................................................................. 2

Settings ........................................................................................................................... 3
2-1. Standard factory delivery settings ........................................................................... 3
2-2.
2-3.

Procedures to change settings ................................................................................ 5
Details of setting items ........................................................................................... 10

3.
4.

Installation ..................................................................................................................... 15
Wiring connection.......................................................................................................... 19

5.
6.

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

7.
8.

Operation modes........................................................................................................... 28
Processes during power outages (external power supply specification: D, RS485

9.

output specification: R) ................................................................................................. 31
Specifications ................................................................................................................ 32

10. Dimension drawing........................................................................................................ 34
11. Troubleshooting............................................................................................................. 35
 Warranty and after-sale service ................................................................................. 36

Preface/Request
Thank you very much for purchasing the Ultrasonic Flow Meter for Air TRZ[Nominal
Diameter] [Power Supply Specification]-C/5P this time. Please be sure to read thisOperation 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. Please keep
the Manual in a safe place until this product is disposed of.

 Outline of productNominaldiameter
100
150
200

Power supply
specification

Kind of gas

D: External power
supply specification
B: Built-in battery
specification
R: RS485 output

C: Factory-supplied air

specification

This flow meter is the ultrasonic flow meter for air capable of measuring the flow of air atpressure from the atmospheric pressure to less than 1 MPa. The flow meter is installed topipes by being tightened between pipe flanges.
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
Incorrect handling by failure to follow instructions with this sign may lead toDangerWarning

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

Noteproperties 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 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) tothis flow meter.
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 1MPa) in use.
3. Avoid usage in an ambient containing a corrosive gas (chlorine, hydrogensulfide, etc.) and/or for an application to a fluid containing a corrosive gas.
4. This flow meter is not of a perfect waterproof structure (IP64). Do notinstall it at a place that may be submerged in water.
5. Install the flow meter as far away from an electric noise source aspossible. If it is installed near the electric noise source, ground the shieldNoteof the external connection cable.
6. 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.
7. 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
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 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
Centering collars

Quantity
1
2

M4 hexagonal wrench

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

External connection
cable

FLOW METER

1

M4 HEXAGONALWRENCH

RemarkFor its use, refer to 3. Installation (page15).
The wrench is to be used to untighten and tighten the set screw whenchanging direction of the display section and to press the back centerbutton (SW3).
Option part
Option part
[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

OPERATION
MANUALCENTERINGCOLLARSEXTERNAL CONNECTION
CABLE

1-2. Name of each part

EXTERNAL
CONNECTION CABLE
SET SCREW
SETTING BUTTONEXTERNAL OUTPUTCONNECTORDISPLAYULTRASONIC SENSORSPECIFICATIONNAME PLATEFIRST 4 DIGITS OFSERIAL NO. DENOTE
A MANUFACTURING
DATE.

BODY
CASING

1

SIGNAL DEVICEPROTECTION TUBE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]

ACCUMULATEDFLOW VOLUME(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

Wiring connection
結線

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 24 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

Corresponding setting
item

Scope of settingStandard factory delivery settings
B
D
R

F1

Display・Output

Forward flow, forward and reverse
flow

Forward flow

F2

Analog output
full scale flow-rate

0 to 99999 [m3/h]

100A: 5000
150A: 10000
200A: 20000[m3/h]

F3

State of contact output

F4*1

Contact output

F5
F6
F7
F8
F9
F10
F11
F12
F13
F14
F15

Normal open,
Normal close
Reverse flow pulse, upper/lower limit
flow-rate alarm,error alarm, electronic statement
outputLower limit alarm flow-59999 to 59999 [m3/h]
rate
Upper limit alarm flow-59999 to 59999 [m3/h]
rate
Alarm judgment value
0 to 9999 [m3/h]
hysteresis width
Flow-ratemoving01, 02, 04, 08, 16, 32, 64 [times]
average number of 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
Fluid selection
Air
Current
output Instantaneous flow-rate, pressure,correlation value
temperature3

Normal open
Electronic statement
output0 [m3/h]59999 [m3/h]
0 [m3/h]04 [times]
1000 [L]Duty
Yes (Normal)
20 [°C]
3
Air
Instantaneous flow-rate

Paneldisplay
F16
F17
F18
F19*2
F20*2
F21*2
F22*2
F23*2
F00
FFF*3

Corresponding setting
item

Scope of settingStandard factory delivery settings
B

Low flow cutoff flow-rate 0≤Setting value≤Qmin*4 [m3/h]
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
bit rate

D

R

100A: 2.6
150A: 5.0
200A: 9.0
[m3/h]
101.3
With (10 times)001

communication 9600, 19200, 38400,
57600, 115200 [bps]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

1 [bit]Even (En)*1 This is an output item for contact output 2 and is selectable only for B and D.
*2 This is an item related to RS485 communication and is selectable only for R.
*3 After resetting, "F9: Output pulse unit" will be set to 1000 [L].
*4 Qmin is the following value depending on the nominal diameter.
100A

150A

200A

10.0

24.0

40.0
[m3/h]

4

Without
Not to be cleared
Not to be reset2-2. Procedures to change settings
Change in settings should be made by button operation by referring to the display
switching flow (Fig. 2-1).
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.

SW3 or no operation for
3 minutes

Measurement
mode

Settingmode

Forward flow output

Forward/reverse flow output

Display ∙ output

Flickering

Flickering

Flickering

Flickering*

Flickering*
Analog output

Normal open

Normal close

Pulse

Alarm

Use SW2 to increment flickering
portion.
Displays the converted information
as selected in F11 “Flow rate
conversion selection.”

State of contact
outputMain unit
aberration output

Electronic
statement output

Contact output*
Flickering

Flickering

Flickering

Flickering

Use SW2 to increment
flickering portion.

Flickering

Flickering

Alarm output lower
limit flow-rate
Flickering

Flickering

Flickering

Flickering

Flickering

Flickering

Flickering

Alarm output upper
limit flow-rate

Flickering

Flickering

Flickering

Flickering

Alarm judgment
value hysteresis
width

4 times

8 times

16 times

32 times*

Use SW2 toincrement
flickering
portion.

Use SW2 toincrement flickering
portion.

64 times

1 timeFlow-rate moving
average number oftimes

Output pulse
unit

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

5*

2 times出力パルス
Output
pulse
単位
unit

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
選択selection

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
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*※SW２で点滅部
Use SW2 to increment
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)

Flickering
点滅 SW２SW１

SW１

conversion)

SW１+SW２
SW２(ｽﾀﾝﾀﾞｰﾄﾞ換算以外)(Other
than

3 min
３分

SW１

60
min
60分

SW１

Unlimited
無制限

SW１

Temperature
温度

Test
mode time
テストモードselection
時間選択

F１３

standard
conversion)

SW１+SW２
SW２

SW１+SW２

F１４

SW１

SW１
空気 Air固定

Kindof gas
ガス種
SW１+SW２

SW２

SW１

Flow-rate
流量

SW１+SW２

SW１

Pressure
圧力

電流出力
Current
outputcorrelating
value
相関値

F１５

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
selectedin 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

No averaging
無し（1回）(1 time)

SW１

SW１+SW２

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

Atmosphericpressure
使用環境のin the operating
大気圧
environment

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
SW２

SW１

SW１

With averaging
有り（10回）(10 times)

SW１+SW２
Withor without
圧力値
pressure value
平均化有無
averaging

F１８

SW１+SW２
SW２

SW２

SW１
Not to be

クリアしないcleared

SW１

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
Resetparameters
リセット
SW１+SW２

SW２

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

6

SW3 or no operation for
3 minutes

Measurement
mode

Settingmode

Forward flow output

Forward/reverse flow output

Display output

Flickering

Flickering

Flickering

Flickering*

Flickering*
Analog output

Normal open

Use SW2 to increment flickering
portion.
Displays the converted information
as selected in F11 “Flow rate
conversion selection.”

Normal closeState of contact
output*Flickering

Flickering

Flickering

Flickering

Use SW2 to increment
flickering portion.

Flickering

Flickering

Alarm output lower
limit flow-rate

Flickering

Flickering

Flickering

Flickering

Flickering

Flickering

Flickering

Alarm output upper
limit flow-rate

Flickering

Flickering

Flickering

Flickering

Alarm judgment
value hysteresis
width

4 times

8 times

16 times

32 times*

Use SW2 toincrement
flickering
portion.

Use SW2 toincrement flickering
portion.

64 times

1 timeFlow-rate moving
average number oftimes

Output pulse
unit

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

7*

2 times出力パルス
Output
pulse
unit
単位

F９

SW２

SW１
SW１+SW２

One-shot pulse: 50 ms

pulse: 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：50ms One-shot
ﾜﾝｼｮｯﾄﾊﾟﾙｽ：125ms ﾜﾝｼｮｯﾄﾊﾟﾙｽ：250ms ﾜﾝｼｮｯﾄﾊﾟﾙｽ：500ms
ﾜﾝｼｮｯﾄﾊﾟﾙｽ：100ms
SW１
SW１
SW１
SW１
SW１

duty

出力パルス
Outputpulse
selection
選択

F１０

SW１+SW２
SW１
SW２

SW１

No conversion
換算なし

Normal conversion

SW１

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
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

Flickering
点滅

Flickering
点滅

SW１

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

F１２* Use SW2 to increment※SW２で点滅部
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)

点滅 SW２Flickering

3 min
３分

SW１

60
min
60分

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+SW２

F１４

SW１

SW１
空気 Air
固定

ガス種
Kind
of gas
SW１+SW２

SW２

SW１

Flow-rate
流量

SW１+SW２

SW１

Pressure
圧力

電流出力
Current
outputcorrelating
value
相関値

F１５

SW１+SW２
SW２

SW１

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

Atmosphericpressure
使用環境のin the operating
大気圧
environment

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 without
平均化有無
pressure
averaging
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

ビットレート
Bit rateselection
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
パリティ無しパリティ
Paritybit
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
SW１

SW２

SW２
Not
to be cleared
クリアしないSW１

Toクリアする
be cleared

SW１+SW２

F００

Clear accumulated
積算値クリアvalues

SW１+SW２

SW２

SW１

SW２

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
リセット

Reset parameter

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, “Forward flow (d. F.)” measurement or “Forward/reverse flow
(d.r. F)” measurement is selectable.
 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 zero flow-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 of zero 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)"Normal open (n. OP)" or "Normal close (n. CL)" is selectable.
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, 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.
* 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.
* 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 theupper/lower limit flow-rate alarms, a hysteresis width range (4 digits) is defined forthe 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
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),” “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 100 L/P, 1000 L/P, and 10000
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

100
TRZ100

1000

○

10000
100
TRZ150

1000

○

10000
100
TRZ200

1000

○

10000

◯

11

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

[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
P1 ＋使用環境の大気圧[kPa][F17][kPa] [F17]101.33× q1

3

Q22: Normal：ノルマル換算流量[Nm/h]Qconversion flow-rate[Nm3/h]t：測定温度[℃]t: Measured temperature [°C]
：測定圧力[kPa]
PP11: Measured
pressure [kPa]3q1：実流量[m/h] [m3/h]
q1: Actual
flow-rate

3

Q2 [Sm /h]＝

273.15＋T(273.15＋t)

×

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

× q1

3

3/h]
Q22: Standard：スタンダード流量[SmQ
flow-rate [Sm/h]
T ：スタンダード換算温度[℃][F12]T:conversion temperature [°C] [F12]t Standard：測定温度[℃]：測定圧力[kPa]t:P1Measured
temperature [°C]q1 ：実流量[m3 /h]
P1: Measured pressure [kPa]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)
The setting is fixed to “Air”. It cannot be changed.

12

[F15] Current output correlation value (selectable for B, D, R)
This is used to select either "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.
[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 flowrate 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)
This is used to set with or without pressure value averaging to either "With averaging(10)" or "No averaging (1)." If "With averaging" is selected, the moving averagevalue of the 10 most recently measured pressures is used for display and output.

[F19] thru [F23] are settings relating to RS485 communication. Make surethese settings match those on your master equipment. The settings cannot bemade for 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)
You can 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 are all
reset.
[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.

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)
2)

Match the arrow on the meter with the forward flow direction of the fluid.
Fig. 3-1 below shows the recommended lengths of straight pipe sections for themeter under different piping conditions.

Conditions

Upstream

Downstream

5 D or longer

90° elbow∙ Full-bore
valve fully
opened10 D or longer

20 D or longer
Merging
10 D orlonger20 D or longer
5 D or longer

Enlargepipe

10 D or longer

10 D or longer

Narrowingpipe

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
ｴﾙﾎﾞありWith
elbow(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)例１：口径100A
ｴﾙﾎﾞ無しExample1: DN100A, 流速10m/s
Flow-rate 10m/s,
No elbow used
= 25kPa
and P2 = 5kPa
P1 Where
25kPaP1 P2
5kPaの時Distancefrom 90° elbow to
90°エルボ～the flow meter
流量計までの距離
10D
or longer

1000＋(25-5)×100×10／20=2000mm(20Ｄ）

Example2: DN100A,流速10m/s
Flow-rate 10m/s,
No elbow used
例2：口径100A
ｴﾙﾎﾞ無しP1 =P2
160kPaand P2 = 10kPa
P1 Where
160kPa10kPaの時

１０Ｄ以上

1000＋(160-10)×100×10／20=8500mm（85D）(Calculation example)（計算例）
Example1: DN100A, Flow-rate 10m/s, One elbow
例１：口径100A
流速10m/s ｴﾙﾎﾞ「1ヶ」
used
P1 = 160kPa
and P2 = 10kPa
P1Where160kPaP2 10kPaの時
1000＋(160-10)×100×10／20×0.8＝7000mm（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)

This flow meter should be installed so that the central axis of the flow meter matches
the central axis of piping. In order to make the deviation of the central axes of theflow meter and piping, use the centering collars provided as an accessory. As shownin Fig. 3-3 Installation example of the centering collars, when installing the upstreamside, the Attached collars should be inserted into the holes of the gasket and flange
at diagonal positions.
Upstream

Downstream

Centering collars
Fig. 3-3 Installation example of the centering collars
5)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 facesup.
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 to direct
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.

6)

The flow meter is of the flange connection type. Fix it with M16 (Diameter: 100A) or
M20 (Diameter: 150A, 200A) bolts and nuts. When tightening the bolts and nuts,
tighten evenly to prevent partial tightening.

7)

Make sure that the flange gaskets do not protrude into the interior of the pipes.

8)

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.
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 the rotating direction.

Delivered state

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

9)

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).

10) 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.
11) 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 portion and/or the signal cable protection tube whenhandling the 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.

(24V
Red
(24V DC)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(4-20mA(4-20mA output)出力)緑Green※1 *1(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

Red(24V DC)赤Black(GND）黒+-(4-20mA出力)緑
output) ※１
Green *1
(4-20mA

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(4-20mA
output (+)) Red*1(4-20mA出力(+))赤※1+ DC24V

D/A(4-20mA
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)]
Brown
SignalreceiverYellow(Red)

Power supply(Black)

TRZ#1

TRZ#2

TRZ#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 (001247) 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.
When connecting an external connection cable, use an equivalent of or one
with a higher capacity than a six-core cable UL style 20276-5B AWG×6C (2).

[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)Black

TRX

TRZ
電源

Power supply(Bタイプ時(Not
requiredは不要）
for
B type)(24V DC)Red(24V DC)赤(GND)Black(GND）黒Fig. 4-5 Signal receiver and connections (external power supply specification:D, built-in battery specification: B)Make a one-to-one connection between TRZ 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 intervalsof 10 minutes or longer.

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

電源Power
supplyGND（黒）(Black)(Red)
DC24V(赤）TRX

TRZ

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 tocorrectly 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出力(+))
赤 output (+)) Red(4-20mA

DC24V
DC24V
±10％

TRZ
GND

PLC,
etc.
PLC等

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

緑

SG
Black
(GND）黒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 the

enclosure (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 to choose
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
出力
dutyoutput

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] The ultrasonic signal is either small or not being received, and therefore
the meter is unable to measure the flow.
[Display] The triangle in the upper left of the LCD flickers.
The instantaneous flow-rate value in the sub-display shows "0.0."
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 showa "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.
[Display] The pressure display in the sub-display shows the aberrant value andflickers.
The instantaneous flow-rate value in the sub-display shows "0.0" 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
At the display of the(forward flow), trip accumulated flow volume, andinstantaneous flow- rate
accumulated flow volume (reverse flow) displays
display (L/min)Fig. 6-2 Pressure aberration displays
3) Aberrant temperature value[State] This state indicates that the temperature value has exceeded themeasurement limits.
[Display] The temperature display in the sub-display shows the aberrant value andflickers.
The instantaneous flow-rate value in the sub-display shows "0.0" 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 the aberration.
[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
At the display of the(forward flow), trip accumulated flow volume, andinstantaneous flow- rate
accumulated flow volume (reverse flow) displays
display (L/min)Fig. 6-3 Temperature aberration displays25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 (setting byusers is not available).
[Display][1] User's area:

The triangle that indicates the Kind of Gas (air)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 the meter backon. (*)*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, andinstantaneous flow-rate [L/min]
Switchover among accumulated flow volume(forward flow), accumulated flow volume (reverseflow), and instantaneous flow-rates [L/min]
Switchover among instantaneous flow-rate [m3/h],pressure, and temperature displays

SW1

SW2
Right rear
Center rear

Settings mode
Select setting
Select setting
item
value

Measuring modes

SW2(Press down for 3
sec.)
SW3

Switchover to settings mode

SW1+ SW2

Clear trip accumulated flow volume

Switchover to test mode

Switchover tothe next setting
item

Switchover ofsetting contents,
Moving place offlickering digit

Switchover toprevious setting
item

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]Maindisplay (Forward flow display mode) S W1+SW2/ Clearﾄﾘ
メイ ン表示（正流表示モード）
trip
accumulated flow volume
ｯﾌﾟ積算ｸﾘｱ

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
settings mode [F1]

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

瞬 時流量

Main
display (Forward flow display mode)
メ イン表示（正逆流表示モード）
Accumulated flow
正 積算
流量 flow)
volume(Forward

S W1

Accumulated
flow rate
逆積算流量(Reverse flow)

S W1

SW3
three無操作
minutes of
S W3 oror3mininaction.

Transition to settings mode
設定モードへ遷移

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))
S W2
Instantaneous flow S W2
Pressure
瞬 時流 量圧力
温度
Temperaturerate
One
1 minminuteelapses.
経過SW2
one 経過minute elapses.
S W2oorr 1min

S W3

S W1

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

ブBlankラ ンク(3orテsec.)ストモード
or testSWSW22(3s)mode time ended.
時間終了

SW 2 ( 3s)Transition to test mode
テストモードへ遷移

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 999999999, thedisplay will show 000000000 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,[2]

and this will allow you to measure very small flow-rates.
While in the test mode, the unit in the sub-display (m3/h, kPa, ºC, or NL/min)[3]

will flash in 0.5 second intervals.
You can select test mode times of either 3 minutes, 60 minutes, or unlimitedusing the setting mode [F13]. The mode will transition to measuring mode
once the set time elapses or by pressing SW2 for 3 seconds or longer in[4]

test mode.
If the flow-rate value in the instantaneous flow-rate display is +0.1 or larger,[5]

there is a possibility* of a leakage downstream of the meter.
If the flow-rate value in the instantaneous flow rate display is -0.1 or smaller,
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 firstdecimal point.
Examples) Display: 0.0 [Nm3/h] Actual: 0 to 0.04 [Nm3/h]
Display: -0.0 [Nm3/h] Actual: -0.04 to 0 [Nm3/h]

30

8.

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

Power 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
Model

Power supply

Conversion

External power supply specification
Built-in battery specification
RS485 output specification
Nominal diameter
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 flow-rate
1/10Qmax(Nm3/h)Qmin*Note2
Qcut

TRZ100D-C/5P
TRZ100B-C/5P
TRZ100R-C/5P
100A

TRZ150D-C/5P
TRZ150B-C/5P
TRZ150R-C/5P
150A

TRX200D-C/5P
TRX200B-C/5P
TRX200R-C/5P
200A

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)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
3700.09000.014800.0
370.0
900.0
1480.0
74.0
180.0
296.0
19.2

36.9

66.3

Accuracy *Note3

Type

Display(switchoverwith buttons)

Maindisplay
Note 4

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)

Forward flow display
mode

Accumulated flow volume: 000000000 [m3 (normal)] Ten digits
Trip accumulated flow volume: 00000000 [m3 (normal)] Nine digits
Instantaneous flow-rate: 0000000 [L/min (normal)] Seven digits

Forward/reverse flow
display mode

Accumulated flow volume: 000000000 [m3 (normal)] Ten digits
Accumulated flow volume (reverse flow): -00000000 [m3 (normal)] Nine digits
Instantaneous flow-rate: 0000000 [L/min (normal)] Seven digits

Instantaneous flow-rate [m3/h (normal)]: 0000.0 (smaller than 10000) Five digits, 00000 (10000 or larger) Five
digits *Note 4 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 60°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
Output 2
aberration, and electronic statement.
Nch open drain output 2 channels: maximum load: 24VDC, 50mA
Output mode: Duty (35 to 65%, maximum frequency: 10Hz)
CommonOr one shot (ON time: Selected from 50, 100, 125, 250, 500ms) *Note 5) (The setting can be changed on thespecifica-tions
site.)
Pulse output unit 1m3(normal)/P, 10m3(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 1m3(normal)/P, 10m3(normal)/P Note 4
1 channel: Compliant with RS485 Modbus/RTU
Communication *Note 3
Communication bit rate: Selected with buttons from 9600, 19200, 38400, 57600, 115200bps.
Connection
JIS10K Flange
Installation orientation
Horizontal (LCD display faces upward), or vertical
Gas touching materials
Stainless alloy, PPS, fluorosilicone rubber, etc.
Weight10.3kg(10.5kg)
18.3kg(18.5kg)
24.4kg(24.6kg)
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

OutputExternal power supply specification
Built-in battery specification

Sub-display*Note 1) For 5kPa or less, the LCD display shows it as 0kPa. However, for RS485 communication, pressure between 0-5kPa isshown 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 numberof 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: 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]
Normal flow-rate conversion values (Nm3/h)
TRZ100

TRZ150

TRZ200Pressure(MPa)

Temperature(ºC)

10(m3/h)

500(m3/h)

24(m3/h)

1200(m3/h)

40(m3/h)

2000(m3/h)

0(atmosphericpressure)

0

10

500

24

1200

40

2000

30

9

450

22

1080

36

1800

0

59

2970

140

7120

240

11870

30

53

2670

130

6420

210

10700

0

79

3950

190

9490

320

15820

30

71

3560

170

8550

290

14250

0

110

5340

260

12810

430

21340

30

96

4810

230

11540

390

19230

0.5
0.7
0.98

33

10. Dimension drawing

Fig. 10-1 Dimension drawing

Unit: mmNominaldiameter

100A
150A
200A

W

H

φD

250

280

210

300

341

280

350

391

330

34

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.
CPhenomenon

Possible cause

Remedial action

Check to see that the kind of gas (air)indicator does not light at the time of
Even operating the
Attempting to set a value that is outside settings mode. If this indicator lights,
Settings
buttons, unable to set a
the range of settable values.
this is indication of attempting to set a
settings value.
value outside the range of settablevalues.
Gas other than air is being used.
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 flowThe direction of the fluid flow and the
Check to see that the arrow on therate 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
The one-shot pulse ON time is equal to
ON time sufficiently large enough foror smaller than the signal receiver's
the signal receiver's minimum input
minimum input signal width.
signal width.
A load resistor of 400 ohms or greater Use a load resistance of no greaterthan 400 ohms.
The current value of the 4- has been connected.
Wiring
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
Connect a receiver that can receive
receive RS485 communication.
RS485 signals.

35

Reference
page

10

5
18
24
31

15
21

23

23

22
10

4

31

C

Phenomenon
Sub-display flickers(pressure andinstantaneous flow-rate)

Sub-display flickers(temperature andinstantaneous flow- rate)

The instantaneous flowrate appears to befluctuating.
The instantaneous flowrate does not fall to zeroeven there is no flow.

After
start
operation

The instantaneous flowrate is too large.

Possible cause

Remedial action

The working pressure range has been
exceeded.
Pressure sensor failure
The operating temperature range has
been exceeded.
Gas other than air is being used.

Do not use gases other than air.

The pressure fluctuates frequently.

This is normal.
This is normal. Installation of the meter
farther away from the pressure governor
is recommended to take accurate
measurements.
This is normal.
Check to see that the value unit on the
sub-display is not flickering.
Please make sure to properly installstraight pipe sections up anddownstream of the meter to suit yourspecific piping conditions.
Check to see that the correct value unit
for the application is used.

A pressure governor is installed near
the flow meter.
The fluid is converting in the pipe.
Test mode is on.
The straight section of the pipe is notlong enough.
It shows the normal flow rate display.

The instantaneous flowrate does not seem tochange.

The instantaneous flowrate is too small.

The partition line isflickering.

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

Check to see that the operatingpressure falls between 0-1MPa (Gaugepressure).
Contact your nearest Aichi Tokei Denki
branch or sales office.
Check to see that the operating
temperature falls between -20ºC and70ºC.

There is excessive flow rate.

Use the meter within the scope of its
specifications.

Please make sure to properly installstraight pipe sections up anddownstream of the meter to suit yourspecific piping conditions.
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
Carrying out adjustments due tocomplete in about 1 minute.
pressure fluctuations.
(The partition line may also flicker
momentarily during other actions, suchas when a valve is opened or closed)This is normal.
Refer to the page indicated to the right
The display is set to trip accumulated
to revert to accumulated flow volume
flow volume display.
(forward flow) or accumulated flow
volume (reverse flow) display.
The straight section of the pipe is notlong enough.

36

Reference
page
25
31

25
31
5
31

16

29
15
16
10
31
31

15
16
10
31

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 (TRZ [nominal diameter][power supply specification]-C/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 productcan 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.

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Ver. 92023.07