RoHS

READ THE INSTRUCTION MANUAL BEFORE USINGINSTRUCTION MANUALMANOSTARSWITCHMS61A-RA

No. TR-MS61A-RA-E00

1-2-3,Nishi-shiriike-cho,Nagata-ku,Kobe,Hyogo 653-0031 JAPANTEL. +81-78-631-6000 FAX. +81-78-631-6020

TABLE OF CONTENTSページ

INTRODUCTION........................................................................................................................... 1
Ⅰ．PRECAUTIONS .................................................................................................................... 1
Ⅱ．THE NAME OF EACH PART ..................................................................................... 2
Ⅲ．INSTALLATION
1．Caution of service condition.................................................................................... 2
2．Installation of MS61A-RA ......................................................................................... 2
3．Installation position ....................................................................................................... 34．Wiring material .................................................................................................................. 3
5．Accessory for MS61A ................................................................................................. 3
6．Pressure of measurement and connection of piping ................................ 3
Ⅳ．SETTING OF PRESSURE
1．Switch contact configuration .................................................................................. 4
2．Setting of upper limit/ lower limit ........................................................................ 4
3．Setting the dial................................................................................................................. 5
4．Reset time .......................................................................................................................... 5
Ⅴ．ABOUT BUILT-IN SWITCH
1．Reed switch structure and operation principle........................................ 6
Ⅵ．GENERAL PRECAUTIONS
1．Prohibition of common piping ............................................................................... 72．Prevention of clogged piping due to drain..................................................... 73．Measurement of high temperature gases ...................................................... 74．Errors caused by long distance piping ............................................................ 7Ⅶ．PERIODIC INSPECTION ............................................................................................... 8Ⅷ．PRODUCT WARRANTY ................................................................................................ 8

INTRODUCTION
Thank you very much for purchasing of "MANOSTAR SWITCH MS61A-RA".
To ensure your safety in using this instrument :△！

Caution・Be sure to read the instruction manual carefully before using the instrument so that youcan use it properly.
Wrong use may result in failure of the 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.

Ⅰ．PRECAUTIONS△Warning！

・Do not use the instrument where flammable gas is present.
The instrument is not explosion-proof. Do not use instruments in the circumstance where flammable gas is present. It
may cause explosion.

・Do not use the instrument at the place where corrosive gas is present.
The instrument is not corrosion resistance construction. Measuring corrosive gas may corrode the receiving element
and housing material of the instrument. It is expected that corrosive gas leaked out of the instrument will harm aperson.

・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 case body and thetransparent 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.

・The instrument is measurable for air and non-corrosive gas only.
The machine is exclusive use of dry air (90％RH or less). Using measuring the water or oil it may be damaged andcauses the accident.

・Avoid using where the instrument is subject to many vibration and impact.
Using the instrument where intensified vibration and impact may be damaged the instrument. It is expected that gas
leaks of the instrument which harms a parson.

・Do not exceed rated surrounding temperature, humidity and altitude in use.
Using the instrument by exceeding rated surrounding temperature and humidity and altitude it may be damaged andcause the accident.

・Do not disassemble or reconstruct the instrument.
It may void the warranty.
・Do not exceed rated voltage in using
Using the instrument by exceeding rated voltage may cause fire or electric shock.
・Wire correctly.
Incorrect wiring may cause fire.

△Caution！

・As to where to install and how to install this instrument, be sure to follow the instruction manual provided
so as to ensure a proper method.
・Use the instrument indoors.
・In case of not being installed in dry and well-kept clean locations, the instrument must be enclosed in box.
・Do not use organic solvent for cleaning.
Use a cloth soaked with water-diluted neutral detergent to wipe the surface of a product. Using of organic solventcauses damage on the surface.

・Dropping the product.
Product is a precision instrument. If you drop the product, there is a possibility that the exterior, also the interiormechanism damage.

・Removal of the piping
Please do not pull the pipe with a strong force. There is a possibility that the pipe cap is broken.

1Ⅱ．THE NAME OF EACH PART
2×φ4.5installation holes
M3.5 terminal screws
under cover

１２

Installation screwfor dial cover

Dial
PointerHigh pressure
side tube tap

Low pressure
side tube tap

Ⅲ．INSTALLATION
Before using this instrument, make sure if it is the type that you requested and meets the demand of theenvironment, pressure and piping conditions where it is used, by specification.

1. Caution of service conditiona) Do not use the instrument in a place subjected to direct sunlight, vibration or shock, or excessivemoisture. In particular, vibration and shock to the instrument should shorten its life.
b) Use under the medium and ambient temperature from - 10 to + 50 ℃.
c) The instrument is not waterproof. Do not use it in a place subjected to rain, or other splashing water.
d) In installing the instrument, select the place where the ground is smooth and flat.

2．Installation of MS61A-RA
Panel cut size2×φ5 or M480±0.3!
△

Caution

2・The tightening torque of the screw is 1 N･m.
・Do not apply excessive torque more thanstipulated value, otherwise it will damage thebody of the instrument.

3．Instaallation position
Affter inspectionn and adjustm
ment in accorddance with the specified installation possition, and shiipped.
Installattion position from upward horizontal
htoverticall is available.
On instaallation panel, following
positionn is available.

Vertical plane
10°

990°

1880°
0°

Horizonntal plane

90°

10゜△！

CautionUse of in a possition other thhan the specified is out off accuracy waarranty.

4．Wirinng material
Chhoose the wirring material depending
don the load. Terrminal screw ofo the productct is M3.5.
W
Wire by perform
ming the termination of thee crimping term
minal (O.D. leess than φ8 which matchees the generall
M3.5 screws.)

M
5．Accessory for MS61A
D cover settDial

Terminaal coverbrasss-made [ optioon ]Po
olycarbonate-m
made [ installe
ed ]Product ccode

Product codee

TCVRA--61

TCA-61A

This covver avoids thee trouble thatt someone turrn set
dial careelessly.

6．Presssure of meaasurement anda connecttion of pipingga) Measuremennt of positive pressure
Connect thhe tube to thee high pressurre side piping connector (HH).
The lowerr pressure porrt (L) should oopened to atm
mosphere, butt do not remoove the pipingg connector.
b) Measuremennt of negative pressure
Connect thhe tube to thee low pressuree side piping connectorc(L)). The high prressure port (H)( should beopened to atmosphere,abutb do not rem
move the pipiing connectorr.
c) Measuremennt of differenttial pressureConnect thhe tube from thet high presssure piping co
onnector to th
he high pressuure port (H) anda from thelow pressurre piping conn
nector to the low pressure port (L).
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Ⅳ．SETTING OF PRESSURE
1．Switch contact configuration
・Composition of contact of this instrument is as shown on theright.

COM.
1・When no pressure is applied, the connection between COM(1) and N.O. (2) is open.

N.O.
2

Increase ofdifferentialpressure

・When the differential pressure increases and reaches the set
pressure, the contact between COM. (1) and N.O. (2) isclosed.

2．Setting of upper limit/ lower limit
・When differential pressure applied to the instrument isincreased starting from zero and changes over the electriccontact from N.C. (normal close) to N.O. (normal open), thepressure at this moment is called “actuation pressure”.
・When this differential pressure decreases from the pressure
higher than this actuation pressure activating electricalcontact and returning the contact from N.O. (normal open) to
N.C. (normal close), the pressure at this moment is called“reset pressure”.

Actuation pressure

Dead bandDifferential
pressure
Reset pressure

Time・There is certain difference between actuation pressure and reset pressure and this is called “dead band”.
・There are two types of the instrument. One is called “upper limit setting type”type (H) whose scale ofsetting knob is adjusted on actuation pressure, the other is called “lower limit setting type”type (L)which is adjusted on reset pressure.
・Depending on the purpose of use, choose the instrument either “upper limit setting type”or “lower limit setting type”
Please confirm the following table about the respective movement.
In case of 50-300 Pa range with set value 100 Pa. (dead band is 60 Pa)
Setting of scale

Adjusting of scale

Movement of contact

Upper limit
setting type

Adjusted in activatingpressure

When the differential pressure increases, the circuit is closed
between N.O. and COM. at 100 Pa.
Then as the differential pressure decreases, the circuit is opened
between N.O. and COM. at 40 Pa.

Adjusted in resetpressure

When the differential pressure increases, the circuit is closed
between N.O. and COM. at 160 Pa.
Then as the differential pressure decreases, the circuit is opened
between N.O. and COM. at 100 Pa.

Lower limit
setting type△！

Caution

It can't be changed from the lower limit setting to the upper limit setting or vice versa.

43．Setting the dial
Use the dial and pointer, when you set the “Activating pressure” or “Reset pressure”.
Set the "Activating pressure" for the upper limit setting.
Set the "Reset pressure" for the lower limit setting.

Dial
Pointer
Set the tip of the pointer to the pressure you desire by knobbing the outer periphery of the dial to rotate thedial. Turning the pointer from the lower side (anti-clockwise) is recommended to set accurately with goodreproducibility. Turning the pointer from the lower side (anti-clockwise) is recommended to set accurately
with good reproducibility.

△！

Caution

Do not turn the dial too much exceeding the upper bound or the lower bound of the scale.
It causes performance deterioration and the failure.

4．Reset time
The reset time means the time needed for the differential pressure to decline to the reset pressure from theactivating pressure (i.e., the electrical contact is reset) when the differential pressure is sharply reduced tozero. It is about three seconds at 20 Pa, and one second at more than 50 Pa for Manostar switches. (Thisvalue is only for the instrument itself and does not include the effect of piping.) Therefore, a response
quicker than this value is not possible.

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Ⅴ．ABOUT BUILT-IN SWITCH
1．Reed switch structure and operation principle
A reed switch is a switch that switches the contacts “ON” and “OFF” using a magnetic field, and two
ferromagnetic leads face each other with a small gap. In addition, an inert gas is sealed in the glass tube toprevent activation of the contacts, improving reliability and extending the life.
When an external magnetic field is applied in the axial direction of the reed switch's reed, the reed ismagnetized and the opposing reeds come into contact and close the circuit. Also, if the magnetic field iseliminated, the circuit can be opened by the elasticity of the reed.

In glass tube

“OFF”

S-poleN-poleS-poleN-poleN-poleS-pole“ON”△！

CautionThe contact may malfunction due to the influence of the external magnetic field. Wheninstalling this instrument, keep it sufficiently away from high voltage and large current
circuits, or provide a magnetic shield if necessary and check the operation before use.

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Ⅵ．GENERAL PRECAUTIONS
Independent piping○

1．Prohibition of common piping

Room A

Room B

MS61A

MS61A

Passageway

Passageway

Piping each of pressure detectors and pressurereceiving instruments tube exclusively dedicated forit, and do not connect the piping commonly with theadjacent system as shown in the right figure.
Common piping causes measurement error because
the pressure of each system interferes.

Common piping×Room A

Room B

MS61A

MS61A

2．Prevention of clogged piping due to drain
If drain remains within the line, it causes measurement error. Be sure toinstall the pressure receiving instrument above the pressure outlet portof the pressure detector and arrange the line so that the drain water
should not remain in the slack piping.
If the arrangement mentioned above in not possible, install a drain tankwithin 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 is fully kept.

Installation diagram of drain tank
SwitchDraintank

3．Measurement of high temperature gases
In the pressure measurement of high temperature gas, use the pressuredetector (pitot tube) made of the heat-proof metal (such as stainlesssteel), and connect it with the pressure receiving instrument through ametal tube which is long enough to cool down the high temperature gas.

Drain

4．Errors caused by long distance piping

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Instrument
body

Piping length

The speed of response is delayed when the product is used for remotemonitoring.
In such application, the I.D. of the connection tube should be as large aspossible.
The time constant is almost inversely proportional to the inner crosssectional area of the piping. (refer to the diagram below)
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 in pressure transmission time, andthe measurement becomes inaccurate.

Ⅶ．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.

Ⅷ．PRODUCT WARRANTY
Warranty Period
The warranty period shall be for one year from the date that the product has been delivered to the location specified
by the purchaser.
Warranty Scope
In the event of any failure or defect in the product or non-conformity of specifications due to the reasons solely
attributable to Yamamoto Electric Works, Yamamoto Electric Works shall remedy such malfunctioning or defective
product at its own cost in one of the following ways to be selected by Yamamoto Electric Works:ⅰ) repair such product, ⅱ) replace such product.
However, this Warranty shall not cover the damages or defects that arise due to any of the following reasons.
(1) Any failure resulting from improper conditions, improper environments, improper handling, or improper usage
other than described in the instruction manual or the specifications arranged between the purchaser andYamamoto Electric Works.
(2) Any failure resulting from factors other than a defect of our product, such as the purchaser’s equipment or thedesign of the purchaser’s software.
(3) Any failure resulting from modifications or repairs carried out by any person other than Yamamoto ElectricWorks’ staff.
(4) Any failure caused by a factor that cannot be foreseen at a scientific/technical level at the time when theproduct has been shipped from Yamamoto Electric Works.
(5) Any disaster such as fire, earthquake, and flood, or any other external factor, such as abnormal voltage, forwhich we are not liable.
Yamamoto Electric Works specifically disclaims all implied warranties of merchantability and/or fitness for a particularuse or purpose, as well as liability for incidental, special, indirect, consequential or other damages relating to theproduct.
*This product warranty is only valid within Japan.
Product Applicability
Our products are designed and manufactured as general-purpose products for general industries. Therefore, ourproducts are not intended for the applications below and are not applicable to them.
(1) Facilities where the product may greatly affect human life or property, such as nuclear power plants, aviation,
railroads, ships, motor vehicles, or medical equipment(2) Public utilities such as electricity, gas, or water services(3) Usage outdoors, under similar conditions or in similar environments
This document has been translated from the original Japanese version, and the original Japanese version takes firstpriority.
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 to change
without prior notice because of modification and the like.

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