. INSTALLATION

INTRODUCTION
Thank you very much for purchasing of "MANOSTAR SWITCH MS65, MS65F".
To ensure your safety in using this instrument : • Be sure to read the instruction manual carefully before using the instrument so that you can use it properly. Wrong use may result in failure of the instrument and lead to its damage and accident. This manual should be kept in a proper place so that you can refer to it any time you need.
I . PRECAUTIONS
Warning

The instrument is not explosion-proof. Do not use the instruments in the circumstance where
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.
Using the instrument by exceeding rated voltage may cause fire or electric shock. • Wire correctly. Incorrect wiring may cause fire. • 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 and cause the accident. • Do not disassemble or reconstruct the instrument. It may void the warranty.
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 of min. Protection degree IP54. • 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 solvent causes damage on the surface. • Dropping the product If the product is dropped onto a desk or floor, not only its exterior but also interior mechanism is broken. 1
Types :
Pressure measuring method : Measuring differential pressure Pressure receiving element  :   Diaphragm (for material information, refer to "Pressure ranges and characteristics" ) Gas to be measured : Air, non-corrosive and non-combustible gases (not liquid) Pressure setting method  :  Dial with scale Standard installation position : Installation position from upward horizontal to vertical is available (refer to p.6) Medium and ambient : - 10 to + 50 ℃ (no freezing) temperature Ambient humidity :  90 % RH or less (no dewing) Withstanding pressure  :  200 kPa of instrument body Withstanding pressure  :  40 kPa of receiving element Withstanding vibration : 5 to 10 Hz Amplitude : 10 mm , 10 to 50 Hz Acceleration : 39 m/s 2 (each two hours on triaxial directions) Withstanding impact : 100 m/s 2 (each six times on triaxial direction) Insulation resistance :  Between each terminal and case 20 MΩ or more (500 V DC megger) Withstand voltage : Between each terminal and case 1500 V AC 50 / 60 Hz, for one minute Material of the outer case :  Phenol resin and aluminum die cast Applicable piping : 1. Vinyl, plastic or rubber tube (I.D. 6) ••• Piping applicable model attached with connector for vinyl or plastic tube 2. Metal tube (O.D. 6 ± 0.1) ••• Piping applicable model attached with connector for metal tube 3. Hard plastic tube (O.D. 6 × I.D. 4) ••• Inner sleeve set (XIN 6 × 4) is needed separately for type attached with piping connector for metal tube. Piping connector polarity : The part of connector piping is marking "H" on high pressure side and "L" on low pressure side. terminal screws Cable connection :  M4 screws (three points) Approximately 380 g Approximately 550 g MS65F Mass : MS65 Accessory : Nil Conformed standards  :  RoHS Directive (2002/95/EC) (Products in compliance with the RoHS carry _ product itself and on each package.) Caution : In case of measuring combustible gas and using in combustible gas area, use with intrinsically safe apparatus construction. Contact rating ：
Caution • In case of driving an inductive load such as relay, contact trouble may be happened due to counter electromotive force and rush current, therefore insert the protective circuit for absorbing surge by using diode or varistor. (refer to p. 9) • In case of low current or voltage, use the low electrical load type. The general electrical load type is decreased contact reliability. (refer to p. 8) Characteristics of built-in air filter (MS65F)
"The withstanding pressure of the pressure receiving element" means ; The max, pressure under which the diaphragm withstands distortion or breakage (withstand single pressure)  The single pressure acting on either H or L side. "The withstanding pressure of the instrument body" means ; The max. pressure under which the instrument body withstand safely without breakage (double side withstanding pressure) The pressure acing on both high and low sides. Note : The withstanding pressure of the instrument body is not the pressure under which the airtightness of the instrument is guaranteed. Caution If the pressure exceeding the withstanding pressure of the pressure receiving element is applied to both L and H sides at the same time, the imbalance of the ultimate pressure arising from the difference in the capacity between the L side and H side chambers or tube. It may cause the pressure exceeding the withstanding pressure and the breakage or distortion of the diaphragm. When applying the pressure exceeding the withstanding pressure of the diaphragm from both H and L sides at the same time, increase the pressure slowly and gradually. Likewise, in relieving the pressure, decrease the pressure slowly.
II. INSTALLATION
Before using this instrument, make sure if it is the type that you requested and meets the demand of the environment, pressure and piping conditions where it is used, by specification.
1. Caution of service condition
a) Do not use the instrument in a place subjected to direct sunlight, vibration or shock, or excessive moisture. 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 . c) The instrument is not waterproof. Do not use it in a place subjected to rain, or other splashing water. d) The instrument cannot be installed outdoors without an appropriate protection. If outdoor installing is required, the instrument should be housed in a box of drip-proof type for outdoor use. e) In installing the instrument, select the place where the ground is smooth and flat.
2. Installation of MS65, MS65F
Panel cut size Tighten the piping connectors with the torque of 1 N・m. Do not apply excessive torque more than necessary, otherwise it will damage the instrument body.
3. Pressure of measurement and connection of piping
a) 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 piping connector. b) Measurement of negative pressure Connect the tube to the low pressure side piping connector (blue or L). The high pressure port (red or H) 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 from the low pressure piping connector to the low pressure port (blue or L).
4. Connectors and piping material
a) Connectors for vinyl or plastic tube (VT, VL, VK connectors) These are connectors for vinyl, plastic or rubber tubes. Be sure to use I.D. 6 and thickness of 1 mm or more. However, the vinyl or plastic tube (2 or more wall thickness) with enough withstanding pressure (including vacuum pressure) is required when the instrument range or the line pressure is higher more than 50 kPa. b) Connectors for metal tube (MT, ML, MK connectors) These piping connectors can be connected to metal tube made from copper and aluminum and so on. (O.D. 6, tolerannce ± 0.1, ring joint type) When this connector is connected to hard plastic tube (O.D. 6, I.D. 4), remove the sleeve made of bress and use the resinous inner sleeve set (XIN6  X 4) that is the optional accessory.
5. Compatibility of connectors
The piping connector of Manostar switch MS65, MS65F, WO81, and WO70 are not compatible with each other.Make sure to use the dedicated connectors of Manostar switch MS65, MS65F.
6. Caution of piping
a) Prohibition of common piping Piping each of pressure detectors and pressure receiving instruments tube exclusively dedicated for it, and do not connect the piping commonly with the adjacent system as shown in the right figure. Common piping causes measurement error because the pressure of each system interferes. b) Prevention of clogged piping due to drain • If drain remains within the line, it causes measurement error. Be sure to install the pressure receiving instrument above the pressure outlet port of 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 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 is fully kept.
c) Measurement of high temperature gases
In the pressure measurement of high temperature gas, use the pressure detector (pitot tube) made of the heat-proof metal (such as stainless steel), and connect it with the pressure receiving instrument through a metal tube which is long enough to cool down the high temperature gas. d) Errors caused by long distance piping The speed of response is delayed when the product is used for remote monitoring. In such application, the I.D. of the connection tube should be as large as possible. The time constant is almost inversely proportional to the inner cross sectional area of the piping. If the piping conditions of the high and low pressure side are significantly different, the difference in the piping resistance between high and low puressure side causes the difference in pressure transmission time, and the measurement becomes inaccurate. adjusted before the factory shipment.
IV . SETTING OF PRESSURE
1. Switch contact configuration
• Composition of contact of this instrument is as shown on the right. • If the instrument is not applied by differential pressure we call such “normal condition”
• At normal condition, the contact between COM, and N.C. is closed, and between COM. and N.O. is open. • With increase of differential pressure and reaching the actuation pressure, the contact will be changed over ; between COM, and N.C. is opened and between COM, and N.O. is closed.
2. Setting of upper limit/ lower limit
• When differential pressure applied to the instrument is increased starting from zero and changes over the electric contact from N.C. (normal close) to N.O. (normal open), the pressure at this moment is called "actuation pressure" • When this differential pressure decreases from the pressure higher than this actuation pressure activating electrical contact and returning the contact from N.O. (normal open) to N.C. (normal close), the pressure at this moment is called “reset pressure” switching difference pressure • 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 of setting knob is adjusted on actuation pressure, the other is called "lower limit setting type" type (L) which is adjusted on reset pressure. • Be careful about the difference between the upper and lower limit setting switched and also understand the relation between the pressure increase/ decrease and the contact composition before designing the operational sequence.
shipping. It is not allowed for customers to convert from the upper limit setting to the lower limit setting or vice versa.
3. Reset time
The reset time means the time needed for the differential pressure to decline to the reset pressure from the activating pressure (i.e., the electrical contact is reset) when the differential pressure is sharply reduced to zero. It is about three seconds at 20 Pa, and one second at more than 50 Pa for Manostar switches. (This value is only for the instrument itself and does not include the effect of piping.) Therefore, a response quicker than this value is not possible.
V .
ABOUT BUILT-IN MICRO SWITCH
1. Material of contact
a) Gold alloy contacts (  “for low electrical load” ) Stable contact performance is expected since oxidizing or sulphidizing film in not easily formed on gold alloy contacts. However, they are not suitable for switching the load of high capacity. If used for such applications, the contacts are rapidly damaged due to sticking and blowout. The max. rating of our Manostar switch having gold alloy contact for micro lad is 100 mA, 30 V DC, resistive load. Use the switches within the limits of the max. rating and the min, rating. b) Silver or silver alloy contacts (  "for general electrical load"  ) In general, the contacts having silver as the main material, which is easy to form surface oxide film and, particularly, sulfide film, contacts work fine in the early stage, but thereafter, on low electrical load such an 10 mA, 24 V DC the firm cannot break. It tends to occur contact failure by the firm. When the current or voltage applied to the contact is high enough to break the oxide/ sulfide film, is broken and the contact is kept good contact. Magnified drowing of contact for
2. Contact material and applicable mecanism for low voltage and low current circuit
The schematic diagram in the right explains the proper range of load voltage and current for which silver or gold alloy contact is generally used when the contact is used for opening or closing the low voltage and low current circuit with a micro switch. When referring to the diagram, keep the following points in mind. The working range for each contact may actually be dependeding on the kind of micro switch, contact pressure, working condition, environmental condition, and the kind of load, and so on. In general, the contact should be selected based on the required level of contact reliability.
3. Protection of contact of switch
• Contact protection circuit is used to extend the service life of contact. It reduces generation of noise at the time of switching on and off. It also minimizes carbide and nitric acid gas generated by arc. Use this circuit correctly, otherwise it will cause reverse effect, making the matter worse. • In case of using contact protection circuit, pay attention the operating time is possibility of delaying a little. The following are typical examples of contact protection circuit.
If the load is larger than the specified contact capacity, use a secondary relay. In general, the load voltage and the corrent is too less to the life of contact is longer. However, this does not expect for a low electirical load. Manostar switches cannot directly shut off the circuit of 250 V AC or more.
4. About measured gas and contact failure
a) Corrosive gas
If the gas to be measured contains corrosive gases (nitric acid, hydrogen sulfide, sulfurous acid, ammonia, chlorine, and so on), they may cause electrical contact failure or corrosion of internal mechanism, which leads to malfunction of the switch. Do not use the switch for the gases containing high humid air because in such gases, the arc generated by opening/ closing the contact produces nitric acid, and it may also cause electrical contact failure or malfunction of switches.
b) Silicone gas
If the gas to be measured contains silicon produced from silicon (contained in oil, grease, filling agent, and so on), the gas produced by arc, generates by opening/ closing the contact, accumulates on the contact surface and causes contact failure. Take corrective measures such as the removal of the gas source or arc suppression.
c) Dust and organic gas
The micro switch used in a Manostar switch is installed in the positive pressure measurement chamber. The gas to be measured can easily flows into the chamber, thus, the composition of the gas largely affects the formation of the film. In addition, the dust contained in the gas to be measured can adhere to the contact surface and be changed into carbide caused the contact failure by the arc generated when the contact is opened or closed. Therefore, pay attention to the measurement environment as well. (Even with gold alloy contact, be careful about the dust.) As the opening/ closing frequency of the contact increases, wear dust from the contact increases. This wear dust accumulates between the contacts to increase the contact resistance and causes the malfunction in the load circuit. In particular, the surrounding where there exists continuous vibration and impact will be most likely to cause contact failure due to worn powder. Caution
VI. ACCESSORIES

Installation of rotary connector
• When you change piping connector from straight type to rotary loose or rotary lock type, refer to the assembly drawing on the right. 1. After cleaning well around connector area, take off the straight type connector by the spanner. Because of 4 preventing intrusion of dust in internal instrument at the time taking off. 2. The O-ring Q of the assembly drawing has been installed already on the instrument body.のThe O-ring ③ has been installed on the adaptor of level difference connector ② . 3. Install the adaptor of level difference connector to mainbody to tighten the part B by the spanner in advance. Then tighten ground A of level difference connector by spanner. Install the rotary connector to both instrument body and the level difference adaptor. 4. After installing, make sure that connector part is turned. In case of lock type, make sure that connector part is not turned. However, in piping, loose the head and move the connector where it is desired to be located and should be tightened again to fix.
Replacement of air filter
• In case of using model with air filter (MS65F), depending on amount of work,  conduct disassembly and clean out once in 2 years periodically and replace filters and packings with new ones. • Filters are constructed as shown in Fig. 1. <How to change> 1. Loosen and take out four assembly screws ❏ from the instrument body, and disassemble filter unit. 2. Remove the used filters ② and packings ① from case ①, and clean out the inner surfaces of case D and O . 3. Replace new packings and filters with refer to Fig.2. Packings should be fit correctly into the grooves on both side of case ① . Next, place new filters onto both sides of case ①. (There are no distinction between the front and the back in packing and filter either.) 4. Then put case ① on top of case © together as to coincide the position of the through-hole on case  Ø with the air hole on case 😊 correctly. (refer to Fig.2) 5. Place the instrument body on top of case O piled with case O . Make sure that the relation of position between the installing leg of case 😊 and the connectors on the instrument body Screw hold with spot are the same as that Fig.2 shows. And also make sure that convex parts under the instrument body are fit into the hollow parts (spot facings) on each corner of caseの. Fig.2 6. Insert four assembly screws 9 into screw- holes as shown in Fig.1 and tighten the instrument body and cases
2. Line part accessories
Pulsating protector
In case of strong turbulent flow of medium air that causes abnormal movement of pointer and output of transmitter, installing a pulsation protector applicable pressure range one each on H side and L side on the piping way between pressure sensor and the instrument.

Corrosive gas absorber
In case of measurement of gas which corrodes the material of the instrument, installing that corrosive gas absorber one each on H side and L side each on piping way between pressure detector prolong instrument life.

VII.  PERIODIC INSPECTION
Generally speaking, it is important not to exert external stress to keep life and reliability of the instrument for a long 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 our product 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 applied at 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 to change without prior notice because of modification and the like.