RoHSSRREAD THE INSTRUCTIION MANUUAL BEFORRE USING

INSTRUCTION MANUAL

MANO
OSTAR
R TRANNSMITTTER
EMT1

No. TR-EMT1-E09

1--2-3,Nishi-shiiriike-cho,Naggata-ku,Kobe,,Hyogo 653-00031 JAPANTEL. +81（78）-631-6
6000 FAX. +881（78）-631-6
6020

INTRODUCTION
Thank you very much for purchasing of 「MANOSTAR TRANSMITTER EMT1」.

△！

CautionTo ensure your safety in using this instrument:
・Be sure to read the instruction manual carefully before using this instrument so that you canuse it properly.
Wrong use may result in failure of this instrument and lead to its damage and accident. Thismanual should be kept in a proper place so that you can refer to it any time you need.

△Warning！

・Do not apply the pressure to the instrument more than it can withstand.
The diaphragm and the retainer are broken and cause of injury or accident, etc. disaster if the pressure
exceeding withstanding pressure of the pressure receiving element is applied to the instrument. The casebody and the transparent cover of the instrument are broken and cause of injury or accident, etc. disaster
if the pressure exceeding withstanding pressure of the instrument body is applied to the instrument.
・Avoid using where instrument is exposed to many vibration and impact.
Using this instrument where intensified vibration and impact may be damaged instrument. It is expectedthat gas leaks of instrument which harms a parson.
・Do not exceed rated surrounding temperature, humidity and altitude in use.
Using this instrument by exceeding rated surrounding temperature and humidity and altitude it may bedamaged and cause the accident.
・Do not disassemble or reconstruct your instrument.
It may void your warranty.

△Caution！

・As to where to install and how to install the instrument, be sure to follow the instruction manual
provided so as to ensure a proper method.
・In case of not being installed in dry and well-kept clean locations, the instrument must be enclosed inbox.
・Do not use organic solvent for cleaning.
Use of organic solvent, such as thinner and benzene, to remove surface dirt and stain may cause
melting and cracking on the surface. To remove dirt and stain, be sure to wipe them off with a wet clothusing diluted neutral cleanser.
・Wrong terminal connection
If the signal input and output terminals are connected to the power supply, the internal mechanism burnsout.
・Dropping the product.
Product is a precision instrument. If you drop the product, there is a possibility that the exterior, also theinterior mechanism damage.
・Removal of the piping
If you replace the old pipes, please do not pull the pipe with a strong force. There is a possibility that thepipe cap is broken.

1Ⅰ．OUTLINE DRAWINGEMT1A (drip-proof indoor-use type)
4 × φ 5 installation long holes

100

4 × φ 5 installation long holes

8888

88 ± 0.3

116

100116 ± 0.3116

100

88 ± 0.3

4 × φ 5 holes
or 4 × M4 holes tapped

4 × φ 5 holes
or 4 × M4 holes tapped
M4 terminal screws

Panel cut size

94
φ73232

φ791

115

G 1/2 internal thread

55

55

Ⅱ．ELECTRONICS CIRCUIT BLOCK DIAGRAM
Two wires method
Span set Zero set

Amplifying circuit

Linearizer

Wave detection
circuit

Out putcircuit

4 to 20mA DC External
connection－instrument
43

Power supply
DC 24 V＋E
Oscillation
circuitPipingconnector (H)Pipingconnector (L)

2－1＋

Diaphragm

Current check terminal(4 to 20mA DC)

Grounding

Four wires method
Span set Zero set

Amplifying circuit

Linearizer

Wave detection
circuit

Out put
circuit
Oscillation
circuit4 to 20mA DC
0 to 1mA DC
0 to 5V DC External
1 to 5V DC connection
instrument
4－3

No power
supply needed
for transmitter＋E
2
1Piping
connector (H)100V AC 50/60Hz
power supply input

Power supply
circuitPTPiping
connector (L)Diaphragm

Grounding2116 ± 0.3

100

EMT1B (exposed terminal connection type)

Panel cut size

Ⅲ．EXTERNAL CONNECTION DIAGRAM
・Two wires method transmitter receives 24V DC power
supply from outside and using power supply wiring,transmits 4 to 20mA DC signal to external receiver units.

Two wires method

Check terminalfrom 4 to 20 mA

1

44 to 20 mA

2

Note : Our receiver is equipped with AC-DC power supply
circuit for two wires method our transmitter,
therefore, In using combination with our receiver,there is no need of the AC-DC power supply which
is separately available.

Receivingequipment

EMT 13

Power supply DC 24 VGrounding

・Two wires method transmitter can monitor output signal
during operation, if they are connected with ampere
meter with internal resistance of less than 10Ω to checkterminal.
・Be careful about connection of two wires method
transmitter and four wires method transmitter as see
figures they are reverse in terms of current flow.
・Four wires method transmitter, which receives 100V AC
power supply, generates 24V DC inside transmitter towork transmitting output signal to external receives.

Four wires method14Receivingequipment

EMT 123Power supply
AC 100 V 50 / 60 HZGrounding

4 to 20 mA
0 to 1 mA DC
0 to 5 V DC
0 to 5 V DCTransmission output diagram (differential pressure - output signal)
For single pressure range

For zero center range

For single pressure range

For zero center range

20mA(5V)

1mA(5V)
Output signal（mA）

12mA(3V)

Output signal（mA）

0.5mA(2.5V)

4mA(1V)0mA(0V)0050

100-500+50050

100-500+50

Pressure （％ FS）

Pressure （％ FS）

Ⅳ．INSTALLATION AND TRIAL RUNNING1．Installation
・Install this instrument at horizontal position (inclination angle at 5 °). If installation surface is vertical,
use the installation bracket on vertical wall to install horizontally. (refer to p.7)
・Take the space of 0.5 m above the transmitter for the purpose of adjustment and maintenance.
・Do not install the instrument outdoors directly. If you need to get it installed outdoors directly, store theinstrument at the storage casing with dew-proof construction.
･Avoid using where the instrument is subject to vibration, big impact and high humidity.
･Do not use at the place where corrosive gas (such as sulfuric gas and ammonia gas etc.) is present.
･Try to use the instrument away as far as possible from intensified power source and the unit generatinghigh frequency (high frequency welder and high frequency sewing machine etc.).
・The instrument is not designed for measurement of combustible gas and installation where explosive
danger risk area (hazardous area) exists. For flammable gas, be sure to provide by intrinsically-safe
system (EMT1H S).

32．Connectors andd piping
VT connector foor vinyl or plasstic tube, resinn-made[instaalled at EMT1FV type]

MT connector
cfor mmetal tube, brrass-made[installed att EMT1FM type]

Prodduct code：KG
GAT1VT

Product code：KGAT1VT
T

Theese are connecctors for vinyyl, plastic or rrubbertubees. Be sure too use I.D. 6 and thickness of 1 mmor mmore. Howeveer, the vinyl oro plastic tubee (2 ormorre wall thickneess) with enouugh withstanddingpresssure (includinng vacuum prressure) is reqquired
wheen the instrum
ment range or the line presssure ishighher more thann 50 kPa.

This connector can be connected too the metal tubbe
made fromm copper, alum
minum and so on. (O.D. 6,the tolerannce ± 0.1, rinng joint type)In case of connecting w
with stainless tube,tuse MTTW
connectorr.
When this connector iss connected too hard plasticc
tube (O.DD. 6, I.D. 4), rremove the brrass-madesleeve andd use the resinnous inner sleeeve set (XINN6× 4) that is the optionnal accessory.（Fig.Ⅲ-2）

MTTW connectorr (double ring joint type) sttainlessstteel made [ opption ]Inner sleeve set [ option ]Product code：KGAT1M
MTW-S

Product code：XIN6X44

Thiss is connector can be conneccted to stainleess tube
(O.DD. 6, the tolerrance ± 0.1).

You need this to connecct hard plastic tube (O.D. 6,,I.D. 4) to thet connectorss for metal tubbe.（Fig.Ⅲ-2）(Fig.Ⅲ-2）△！

Caaution

Innner（resin)
Sleeve（resin)t
Plastic tube

Tightten the termina
al screws with thetorquue of 1.2 N･m.
Do notn apply excesssive torque moore
than necessary, othherwise it will
damaage the instrumment body.

4

3．Pressure of measurement and connection of pipinga) Measurement of positive pressure
Connect the tube to the high pressure side piping connector (indicated by red color or letter H).
The lower pressure port (blue or L) should opened to atmosphere, but do not remove the pipingconnector.
b) Measurement of negative pressure
Connect the tube to the low pressure side piping connector (blue or L). The high pressure port (red orH) should be opened to atmosphere, but do not remove the piping connector.
c) Measurement of differential pressure
Connect the tube from the high pressure piping connector to the high pressure port (red or H) and fromthe low pressure piping connector to the low pressure port (blue or L).

△！

CautionMeasurement of single pressure using an instrument with zero point center range.
Connect the tube to the high pressure side piping connector (red or H). In this case again,
leave the piping connector attached to the low pressure side, which is opened to atmosphere.
The single pressure is as displayed on a zero point center scale (+-).

4．Caution of piping・Prohibition of common piping

Common piping×Passageway

Piping each of pressure detectors and pressure receiving
instruments tube exclusively dedicated for it, and do notconnect the piping commonly with the adjacent system asshown in the right figure.
Common piping causes measurement error because thepressure of each system interferes.

Room A

Room B

EMT1

EMT1

・Prevention of clogged piping due to drain
Independent piping○Passageway

If drain remains within the line, it causes measurement error.
Be sure to install the pressure receiving instrument above thepressure outlet port of the pressure detector and arrange theline so that the drain water should not remain in the slack
piping.
If the arrangement mentioned above in not possible, install adrain tank within the line as shown in the right figure and clean
it once in a while.
After the cleaning of the tank, check that the air tightness isfully kept.

Room A

Room B

EMT1

EMT1・Measurement of high temperature gases
In the pressure measurement of high temperature gas, use thepressure detector (pitot tube) made of the heat-proof metal(such as stainless steel), and connect it with the pressurereceiving instrument through a metal tube which is longenough to cool down the high temperature gas.
・Errors caused by long distance piping
The speed of response is delayed when the product is used forremote monitoring.
In such application, the I.D. of the connection tube should be
as large as possible.
If the piping conditions of the high and low pressure side are
significantly different, the difference in the piping resistance
between high and low pressure side causes the difference inpressure transmission time, and the measurement becomesinaccurate.
5DraintankDrain

5．Wiring and connection
・＜EMT1A＞ can be used for cabling or conduit wiring. In addition, try to use wiring accessory orconnecting accessories that is separately available.
・Use shielded wire for input and output wiring on current and voltage signal, and do not put them near
power line. Moreover, do not let it go through the same conduit with power line.
・Use two core shielded wiring for four wires method cable and try to minimize the induction problems
coming from AC power supply of the same cable supply.
・Exercise care about terminal connection number because it is different according to types. Make sure
about a code of terminal connecting part on the terminal block, in accordance with the external
connection diagram.
・Use a crimping terminal suitable for M4 terminal screw. (refer to bellow the figure)・Provide the the instrument on the grounding terminal with the class D grounding (grounding resistanceis 100 Ω or less).
Get grounding at the foot of installed unit. Also, EMT1A can get it from the grounding terminal insidethe upper cover.

φ8.2

φ9・Make a one point grounding at the one end of shielded output signal cable.

φ4.3

△！

CautionTighten the terminal screws with the torque of 1.0～1.3 N･m.
Do not apply excessive torque more than necessary, otherwise it will damage the instrument body.

6．Zero adjusting1) Since zero point of the instrument is changed according to mounting posture, therefore, after installation ofhorizontal posture is completed, be sure to perform zero adjustment.
2) After making sure that there is no mistake about wiring and connection, supply each equipment with power andstart a warm-up for 10 minutes.
3) Remove tubing of the instrument from High pressure side as well as Low pressure side and vent theatmosphere.
4) Take out the upper cover of the instrument, turn the zero set adjuster inside and set zero point output of theinstrument at the value indicated on the table below.
5) As for span set adjusting, it has been adjusted already at our factory. Do not handle it.
Output signal table＜EMT1A＞

For single
pressure range

For zero point
center range

Output signal(DC)

Zero point

Zero point

4 to 20mA

4.0mA

12.0mA

0 to 1mA

0.0mA

0.5mA

0 to 5V

0.0V

2.5V

1 to 5V

1.0V

3.0V

E6

＜EMT1B＞

Do not handle it.

Do not handle it.

Zero set

Zero set

Printed circuitbord

Ⅴ．ACCEESSORY F OR PRESSSURE TRAANSMITTE
ERT
Terminal coveer set polycarbonate, brasss-made ［opption］

Prroduct code：T
TCA-T1Forr wiring
Plasstic ground（foor EMT1A） polyacetal-mapade ［option］］

Prroduct code

RubberRbushingg
color

Applicaable cableouter diaameter (mm)
Min.

Max.

AC4-2T

Black

6.5

9.0

AC4-3T

Red

8.5

11.0

AC4-4T

Green

10.0

12.5

Plasstic ground is useduto wiring transmittert
withh instrumentatiion cable. Choose the plastic ground of the size that rubbeer
bushh hold externall of cable as shhown right tablee. Be carefully O.D. of cable

Forr wiring conduuit
Adaptor fo
or conduit brrass-made ［［option］
25

When yoou wire the connduit tube of normal diameterr
19 or pliable metal connduit throughou
ut the conduit
tube, usse the adaptor ffor conduit as shown rightfigure. BecauseBwire innlet size of the transmitter
differ byy internal threaad of G 1 / 2.

22

C19Thread forcable conduit

φ15G 1/2

10

Product code： ADPA-EMT1

Instaallation brackeet on vertical wall steel-m
made ［option］］
8×φ5 installation holes
Manostar Transmitter

135

φ301.655 25100110※※Installation screews are not includ
ded.

Vertical wall

135
4×φ7 innstallation holes on wall

0.5m or more

12.5Prroduct code：BBRKT-T1GP1

For installation bracket on verticcal wall. Install this instrumen
nt at horizontal position (inclinnation angle at 5 °).
If innstallation surfaace is vertical, use the installaation bracket ono vertical wall to install horizzontally.
Takke the space off 0.5 m above th
he transmitter for the purpose of adjustmentt and maintenaance.

7

Ⅵ．PERIODIC INSPECTION
Generally speaking, it is important not to exert external stress to keep life and reliability of the instrument for along time.
Proper use of this instrument will ensure its faultless service over many years without any necessity of periodic
lubrication.
However, it is recommended that it is subjected to periodic inspection (calibration) once a year.

Ⅶ．PRODUCT WARRANTY
Warranty Period
This product warranty is valid for one year from the date of delivery to a place specified by an ordering party who
has transacted directly with Yamamoto Electric Works Co., Ltd.
Coverage
If a product breaks down due to a reason for which we are responsible during the warranty period and you return
the product to us, we will either repair or replace the product free of charge.
This warranty does not cover:(1) Usage of the product under any inappropriate conditions or environment contrary to what is described in ourproduct catalog, specifications or manual.
Handling or usage of the product other than as described in our product catalog, specifications or manual.
(2) Breakdown due to a reason other than a fault within our product.
(3) Any product that has been modified or repaired by a party other than us.
(4) Any breakdown due to a reason that was not foreseeable based on scientific and technical standards appliedat the time of shipment.
(5) Any breakdown due to a reason not attributable to us such as a natural calamity or other disaster.
These terms of warranty represent our entire liability with respect to the product, and we shall have no liability
for any other loss arising in connection with a breakdown of the product.
*This product warranty is only valid within Japan.
This document is a translation from the original Japanese version, and the original Japanese version has priority
over this translation.
Be sure to refer to the original Japanese for the details of this warranty.

<Prior notice>
The specifications and description of the product explained in this instruction manual may be subject tochange without prior notice because of modification and the like.

8