OPERATION MANUAL. Digital Flow Switch DFS3 Series. Manufacturer : Taiyo Ltd. <URL:

Transcription

1 OPERATION MANUAL Digital Flow Switch Series Thank you for your purchase of Digital Flow Switch Series. Manufacturer : Taiyo Ltd. <URL: (If you have any inquiry, please contact any of our sales offices shown in the last page of this manual.)

2 1 Preface / Table of Contents / 1. Definition of Warning and Caution Marks and Messages Preface This operation manual includes instructions and precautions necessary for safe and long use of this product featuring good performance. Be sure to read this manual carefully before using this product. Especially, strictly observe safety instructions and messages with the warning marks and caution marks shown in this manual. Fully understand the contents of this manual, and keep this operation manual carefully for your later reference at any time. WARNING For safe use Inappropriate handling of this product may lead to unsatisfactory performance or serious accidents. To prevent any accident, be sure to read this operation manual carefully, and fully understand the contents before using this product. Hand this operation manual to the actual user of this product. After reading this operation manual, keep it carefully for later reference at any time. Table of Contents 1. Definition of Warning and Caution Marks and Messages Precautions for Use...2, 3 3. Components Checks When Unpacking Construction and Operation Principle Piping...5, 6 7. Installation Wiring...8 to Maintenance Setting method and fluid...14, Others Specifications Outside dimensions...17, Definition of Warning and Caution Marks and Messages In this operation manual, the "Warning" and "Caution" marks and messages are defined as shown below. The warning and caution marks need extreme care to be taken for safe operation. These marks are accompanied with the messages important to prevent any possible injury or damage to this product. Be sure to observe the instructions when using this product. WARNING CAUTION Inappropriate handling of this product may lead to dangerous status, and loss of life, serious injury, or critical damage to this product may occur. Inappropriate handling of this product may lead to dangerous status, and moderate or slight injury, or damage to this product only may occur. This product is designed and manufactured as a general industrial equipment component.

3 2. Precautions for Use 2 2. Precautions for Use WARNING Precautions for Use Be sure to check for leak from the flow switch and piping before daily use. If any abnormality is found, DO NOT use them, and ask for inspection or repair. Check the specifications of the power supply voltage, load voltage, and current of the flow switch currently used. Application of wrong voltage or current may lead to a malfunctioned or damaged flow switch, an electric shock, or a fire. Furthermore, injuries or physical damages may occur subsequently. DO NOT use this product in the atmosphere including explosive gasses, since it does not have explosionproof construction. Otherwise, explosion may occur, leading to injuries and physical damages. Be sure to use this product within the ranges of operating flow and operating pressure. If it is used with the flow exceeding the operating flow range, malfunctions may occur. Application of the pressure exceeding the maximum operating pressure will lead to a damaged flow switch. Especially, take extreme care not to apply the pressure exceeding the specified level by using a water hammer. <Measures to abate water hammer impact> 1. Use the water hammer relaxation valve to slow the valve closing speed. 2. Use elastic piping materials, such as rubber hoses, and an accumulator to absorb impact pressures. 3. Lengthen piping as long as possible. Piping should be laid so that the detection passages and the inside of the flow switch are filled with fluid. Any trapped air bubble in the flow switch or fluid may lead to higher rotor speed, causing fluctuations in the alarm output flow. Be sure to use the flow switch within the ranges of operating ambient temperature and operating fluid temperature. The ambient temperature range shall be between 0 C (32 F) and +50 C (122 F), and the operating fluid temperature range shall be between 0 C (32 F) and +70 C (158 F). If this product is used at temperatures out of these ranges, the rotor magnet magnetism may be reduced, the output switching may be faulty, or the service life may be shorter. Provide measures to prevent freezing when using this product at a temperature lower than 5 C (41 F). Otherwise, the Oring may be damaged or the product may be malfunctioned. DO NOT use this product in the place that the temperature drastically fluctuates. Otherwise, dew condensation may occur to the inside, leading to malfunctions. Install a filter to the upper stream side of the fluid used when it contains rust, metal particles, dust, or other abrasive materials. If the magnetic proximity type flow switch is used with such a fluid, metal particles contained may attach to the rotor magnet, leading to malfunctions. In such a case, use the iron proximity type flow switch (500 ). DO NOT exceed the specified flow range. Otherwise, correct measurement is impossible. Although the digital flow switch is dust and drip proof, DO NOT use it in the place where is excessively splashed with water or oil. DO NOT apply a load exceeding the maximum load capacity to the flow switch. Otherwise, it may be damaged or suffer shorter service life. DO NOT use loads generating surge voltage. When directly driving such loads including relays and solenoid valves, absorb a surge by following the instructions shown in the "Precautions for wiring". DO NOT use this product near a surge source. If there is an equipment generating a great surge (electromagnetic type lifter, high frequency induction furnace, motor, etc.) near the digital flow switch, the switch internal circuit element may be degraded or damaged. In such a case, provide measures against a surge and avoid mixing and contact of lines.

4 3 2. Precautions for Use/3. Components 2. Precautions for Use CAUTION Check the calibration plate of the calibrated flow switch which is arranged together with a digital flow meter, and use the flow switch together with the flow meter with the same serial number (DFM21000 ). However, remember that the flow switch needs to be calibrated by yourself when any of the conditions shown below is satisfied. (1) Fluid other than water is used. (2) The measurement range is modified after purchase. (3) Only a digital flow meter is purchased. 21. For secure safety and prevention of dangers Be sure to observe the messages and instructions accompanied with the warning and caution marks included in this manual. Noncompliance with them may lead to damages to this product or surrounding equipment, or injuries. 22. Limited Liability Properly use this product following the instructions in this manual. Noncompliance with the warnings and precautions in this manual or inappropriate handling of this product may lead to damages to this product or surrounding equipment, or injuries. TAIYO shall not be liable for these damages. The products modified by customers shall be out of our warranty. 3. Components 1000, 1002, 1200, 1500, 2000, 2500, 5000, 5002 Precautions for use Body Cover Rotor pin Rotor Rotor cap Rotor cap opener (accessory) Note) The shapes of the components vary depending on the model.

5 4. Checks When Unpacking / 5. Construction and Operation Principle 4 4. Checks When Unpacking CAUTION Checks when unpacking Check that the product delivered is as ordered. Installation and use of a wrong product may lead to injuries or damages to equipment. When unpacking, check the followings shown below. If any fault or abnormality is found, please contact any of our sales offices shown in the last page of this manual. 1) Ensure that the correct product is delivered by checking the plate on the product delivered. 2) Check for any damage occurred by unexpected accidents during transportation. 3) Check that accessories such as a plug, Oring, and rotor cap opener are also contained. 5. Construction and Operation Principle (Note: The DFS 3 series products do not have the prediction function provided for the DFS 2 series.) <Construction> Indicator lamp Normal status (Green) Alarm status (Red) Body 1000 Electrical circuit 2000 Body Rotor part Flow setting trimmer Flow range A(0.5 5 L/min) Small flow type ( L/min) Flow range ( L/min) <Operation principle diagram> Relay output type Flow range B ( L/min) Open collector output type Trimmer Ambient setter Ambient comparator Regulator LED Green Red Power supply NO: b contact COMMON Trimmer Ambient setter Ambient comparator Regulator Power supply LED Green Red OUTHIGH OUTLOW Delay circuit NC: a contact Delay circuit OUTCOM Frequency output (+) Frequency output (+) Frequency output ( ) Frequency output ( ) The rotor rotates at the rotation speed in proportion to the fluid flow. A permanent magnet is molded in the rotor. Rotation of the rotor is detected with the builtin sensor, and converted into electric pulse signals. Since the digital type sensor is used to generate the pulse signals unlike electric generation by coils, unified short waves of constant height can be obtained regardless of rotor rotation, to feature the noiseproof construction. The pulse cycle is compared with the cycle previously set by the trimmer. When it exceeds the set value (flow lower than the set value), alarm signals are output, and the green output indicator lamp turns to red. In order to prevent unnecessary alarm output caused by fluid ripples or momentary interception, the alarm signals are output only when the cycle continues to exceed the set value for 500 ms with the delay circuit shown in the diagram above.

6 5 6. Piping 6. Piping WARNING Piping 100, 500 Use only the attached plug and sealing Oring. Otherwise, fluid leak or crack of the body may occur. When installing the plug, use the attached Oring. DO NOT apply excessive torque to the plug, since it is made of resin (the torque should be 3 to 4 N m). Otherwise, fluid leak or crack of the body may occur. In the case of the flow switch hung for piping with steel pipes, use the separately sold piping adapter (model: DFAP). If the flow switch is directly installed in such a case, it may be damaged. When installing the flow switch to piping, be sure to tighten it with the specified tightening torque. If it is tightened with the torque exceeding the specified range, the switch may be damaged. Tightening with the torque lower than the specified range may lead to loosened screws. (Tightening torque range: 15 to 20 N m) To install the small flow type flow switch, insert the attached small flow nozzle into the flow IN side of the range A. Then, fit the sealing Oring, and screw the small flow piping adapter in. Be sure to install the adapter notched on the hexagon surfaces (small flow piping adapter) to the flow IN side. Wrong installation of the adapter by reversing the IN and OUT sides may cause fluid leak or damages to port. The small flow piping adapter is notched on the hexagon surfaces. (Refer to the installation instructions of the small flow piping adapter set (DFFW2).) For the small flow piping adapter sets for the 1200 and 1500, contact us. Securely insert the nozzle. Otherwise, the adapter cannot completely screwed in. Screw the adapter in until the contact surface of the adapter comes in contact with the body side closely. Otherwise, fluid may leak from the piping. When installing the small flow piping adapter and piping adapter, be sure to use sealing tape, and tighten them with the tightening torque between 15 and 20 N m. DO NOT wrap the sealing tape three times or more. 1200, 1500 Use only the attached plug. Otherwise, fluid leak may occur. Piping should be designed and laid so that fluid always flows filling the detection passages by raising the piping on the lower stream side of the flow switch. Especially, in the case of the vertical piping, piping should be laid so that fluid flows from the lower side to the upper side. Any trapped air bubble in the flow switch or fluid may lead to higher rotor speed, causing fluctuations in the alarm output flow. Flush pipes before piping to prevent seal tape strips, dust, and rust from entering the pipes. When installing a plug to the port unused, use the attached resin plug and Oring (1000, 1002, 5000, and 5002) or the attached metal plug (1200 and 1500). DO NOT use sold metal plugs. Excessive reduction of pipe size in piping and valve restrictors on the primary side may lead to cavitation in the piping, causing the impossibility of correct measurement. These should be provided on the secondary side of the flow switch. When installing the flow switch, DO NOT use a wrench for the resin parts. Otherwise, the flow switch may be damaged.

7 6. Piping 6 <Plug mounting and piping methods> Note: The plug and adapter are not mounted on the product in our factory. Note: No optional flow range is available for the 2000 and Select a necessary flow range, and insert the attached plug into the unnecessary port. 1000, 5000 Ex.) (1) When the set flow is 1 L/min (the normal flow is 2 L/min) and the primary side pressure is 0.2 MPa, select the range A, and mount a plug to the range B. Range A Range B Sealing Oring Plug (2) When the set flow is 3 L/min (the normal flow is 6 L/min) and the primary side pressure is 0.1 MPa, select the range B, and mount a plug to the range A. 1200, 1500 Note) When installing the plug for the 1000 and 5000, use the attached sealing Oring. Tighten the plug with the tightening torque between 3 and 4 N m, since it is made of resin. Be sure to use seal tape when installing the plug for the Range A Range B Plug Use seal tape Note) 1200 and Use only the attached plug. <Installation method of small flow piping adapter set (Model: DFFW2)> To install the small flow type flow switch, insert the attached nozzle into the flow IN side of the range A. Then, fit the sealing Oring, and screw the small flow piping adapter in. (Tightening torque: 15 to 20 N m) Install the piping adapter attached to the small flow type flow switch together with the sealing Oring on the flow OUT side of the range A if only it is necessary. (Tightening torque: 15 to 20 N m) 1002, 5002 Piping adapter Plug Small flow nozzle Sealing Oring Small flow piping adapter Vnotch for identification Flow direction Oring for nozzle Sealing Oring Plug Note) The figure shown above is the installation drawing in the case that fluid flows in the arrow direction. Install the plug by following the instructions for mounting method.

8 7 7. Installation 7. Installation WARNING Installation In the case of the flow switch hung for piping with steel pipes, use the piping adapter set (model: DFAP). If the flow switch is directly installed in such a case, it may be damaged due to the moment applied. (100 and 500 ) DO NOT install the flow switch to the place used as a foothold. Otherwise, it may be damaged when an excessive load is applied. Tighten the mounting screw on the front side with the tightening torque within the range between 1.2 and 1.8 N m. (100 and 500 ) Check that the equipment is operated correctly before use. Perform appropriate functional check and leak check, and ensure that the flow switch is properly installed after installation, repair, and maintenance. The products modified or uncovered by customers shall be out of our warranty. DO NOT drop or hit the flow switch, nor apply a great shock to it when handling it. Otherwise, the switch inside may be damaged, causing malfunctions even if the switch case is not damaged. Install the flow switch to the place free from vibration and shock. <Installing method> (1) In the case of the flow switch hung for piping with steel pipes (2) In the case that one side is inserted into a steel pipe, and the other side is connected to a resin tube (3) In the case that the body is fixed to the plate, and resin tubes are used for piping

9 8. Wiring 8 8. Wiring WARNING Be sure to shut down the power supply to the connection side electric circuit before wiring. Otherwise, operators may suffer electric shock during working, or the digital flow switch or loads may be damaged. Check the insulation on the wiring to avoid any faulty insulation (mixing and contact with other circuits, grounding, faulty insulation between terminals, etc.). Otherwise, overcurrent may flow to the switch, leading to damages to it or injuries due to electric shock. Check the specifications of the power supply voltage, load voltage, and current of the flow switch used. Application of wrong voltage or current may lead to a malfunctioned or damaged flow switch. In the case that the distance to the cable connection end is long, fix the cable with intervals of approx. 20 cm to prevent it from loosening. If it loosens, it may be caught with your foot, causing injuries or broken cables. CAUTION Wiring Wiring When wiring, check the wire colors and terminal numbers. Wrong wiring may lead to damages to the switch and malfunctions. Check the wire colors with this manual before wiring. Avoid repeated bending or tensioning of lead wires. Wiring applying repeated bending stress or tension to the lead wires may cause broken wires. When laying cables onto the ground, protect them with metal tubes. Otherwise, they may be directly trodden or pinned under equipment, causing broken cables and shortcircuit. Highvoltage wires of other electric equipment, power supply, and power supply cables should never be bound with the cables, nor wired near them. Otherwise, noise from the highvoltage wires, power supply, and power supply cables enters the digital flow switch cable, leading to malfunctions of the digital flow switch or loads. It is recommended to protect the cables with shield tubes. For the 100 V AC type, DO NOT shield the power supply cables together with the signal cables. Ground wires protect the digital flow switch from noise generated from the power supply cables. Ground resistance must be less than 100Ω (class 3). <Wiring method> Relay output For DC type Red: +24 V DC Transistor output For DC type Red: +24 V DC Black: 0V Black: 0V Gray: Ground... Grounding Gray: Ground... Grounding Brown: Relay b contact Brown: OUTHIGH Green: Relay a contact Alarm output Green: OUTLOW Alarm output For AC type alarm freq. Yellow: Relay common Blue: Frequency output (+) White: Frequency output () Flow signal Connected to digital flow meter DFM2 For AC type alarm freq. Yellow: OUTCOM Blue: Frequency output (+) White: Frequency output () Flow signal Connected to digital flow meter DFM2 REG. F alarm freq. White: 100 V AC Black: 100 V AC Green: Ground... Grounding Black: Relay b contact Green: Relay a contact Alarm output Yellow: Relay common Red: Frequency output (+) White: Frequency output () Flow signal Connected to digital flow meter DFM2 REG. F alarm freq. White: 100 V AC Black: 100 V AC Green: Ground... Grounding Black: OUTHIGH Green: OUTLOW Yellow: OUTCOM Red: Frequency output (+) White: Frequency output () Alarm output Flow signal Connected to digital flow meter DFM2

10 9 8. Wiring <Precautions for using output relay> Be sure to shut down the power supply to the connection side electric circuit before wiring. Otherwise, operators may suffer electric shock during working, or the digital flow switch or loads may be damaged. Be sure to connect loads to output contacts. Direct connection to the power supply without a load may lead to welding of contacts and burning. Avoid such an operating method that the alarm output relay is used for a long time (e.g. detection of abnormal increase in the flow rate). Otherwise, corrosion of the contact will be accelerated due to temperature increase in the output relay coil. In such a case, it is recommended to select the transistor output type. Be sure to use the output contact within the contact capacity range. Use of the output contact in excess of the max. value of the contact capacity may result in problems such as abnormal wear, faulty cutoff, welding, and burning. If the output contact is used in a microcurrent circuit, faulty continuity is liable to occur due to absorption of oxide and carbide by the contact. In such a case, it is recommended to select the transistor output type. Never form such a circuit that overcurrent may flow or burning may occur when arc shortcircuit occurs to the three output contacts, NC, NO, and COM. Output contact NC NO COM Load When the digital flow switch is used in highly humid atmosphere and a load liable to cause arc at the output contact, the metallic part in the output relay may be corroded, causing disordered operation. Use the digital flow switch at ambient humidity of 85% RH or less (ambient temperature is 20 C/68 F). DO NOT make or brake a large load and a micro load with an output relay. Files of contact generated when making or breaking the large load will attach to the make and break contact of the micro load, causing disordered operation. Output contact NC NO COM Inductive load, capacity load, etc. Large load Micro load Resistance load of several ma or less, etc. When a semiconductor is operated with the output contact, the output relay may respond to the bounce or chattering of the contact. In such a case, it is recommended to select the transistor output type. When the output relay acontact is used, the contact is made when the actual flow rate is lower than the set flow rate. The output relay is operated when the actual flow rate is lower than the set flow rate. Accordingly, when the power supply is shut down due to some reasons, the output contact enters the status that the actual flow rate is higher than the set flow rate. Extreme care should be taken to this point when designing the system. When wiring, check the contact capacity. Resistance load V AC, 30 V DC, lower than 5 A When using inductive loads, provide measures to prevent surges.

11 8. Wiring 10 <Precautions for protecting contacts> When an inductive load such as a DC relay is operated with the output contact, be sure to absorb surges with diodes. Otherwise, when the inductive load circuit is open, counter electromotive voltage of several hundreds to several thousands voltage will be generated, and electric discharge may occur to the contact. As a result, organic matters in the air may decompose to generate oxide and carbide on the contact, causing faulty contact. Furthermore, transposition phenomenon may occur to the contact, leading to the locked contact. When a capacity load is operated with the output contact and rush current reaches several amperes or higher, be sure to use the contact protective circuit. Otherwise, rush current may lead to electric discharge at the contact, causing the transportation phenomenon. As a result, the contact may be locked or welded. Inductive load DC AC Condenser guideline value: 0.5 ~ 1 (µf) per contact current of 1 A Resistance guideline value: 0.5 ~ 1 (Ω) per contact voltage of 1 V Inductive load DC (+) ( ) Use a diode with the peak inverse voltage at least 10 times as large as the circuit voltage and the forward current higher than the load current. Inductive load DC AC Select the cut voltage Vc so that it satisfies the following conditions. In the case of alternating current, it is required to multiply the max. contact voltage by 2. Max. contact voltage > Vc > Power supply voltage 1.5 When mounting a protective element, it is necessary to mount it just nearby the load or contact. If it is mounted away from them, the effect of the protective element may be imperfect. As a guideline value, mount it in position within 50 cm from the load or contact. When the lead wire connecting the output contact to a load is very long (10 m or longer), the rush current may occur because of floating capacity of the wire duct. In such a case, use a resistance (approx. several Ω to 50Ω) appropriate for the load in series with the contact.

12 11 8. Wiring <Precautions for using transistor output> Be sure to shut down the power supply to the connection side electric circuit before wiring. Otherwise, operators may suffer electric shock during working, or the digital flow switch or loads may be damaged. DO NOT exceed the operating voltage range (max. allowable voltage: 50 V DC). Application of voltage exceeding the operating voltage range or use of the alternating power supply may lead to damaged or burned internal element. Load Alternating power supply DO NOT shortcircuit a load. Otherwise, the internal element may be damaged or burned. Load Shortcircuit load + DO NOT wrongly wire the power supply poles. Otherwise, the internal element may be damaged or burned. Load + Wrong polarity Be sure to use a load when wiring. Direct connection to the power supply without a load may lead to damaged or burned contact. Without load +

13 8. Wiring 12 Connection to PLC (programmable controller) In the case that the PLC includes a power supply PLC Input terminal COM Internal power supply DC (Note: For details, refer to the operation manual of the PLC used.) In the case that the PLC includes no power supply PLC Direct current Input terminal COM (Note: For details, refer to the operation manual of the PLC used.) When connecting some digital flow switches in parallel with a load (e.g. when inputting to the PLC in the OR circuit), take care of output leakage current of the digital flow switch. The leakage current may cause operation of the load. Leakage current per output I CEO 0.1mA (VCEO = 80V Ta = 25 C) When connecting some digital flow switches in series with a load (e.g. when inputting to the PLC in the AND circuit), take care of output residual voltage of the digital flow switch. The output residual voltage may cause impossibility of load operation. Output residual voltage per output VCEO 0.8V ( I C = 10mA Ta = 25 C) <Precautions for protecting output circuit> When connecting an inductive load such as a DC relay, be sure to absorb surges with diodes. Otherwise, when the output is turned off, back electromotive force occurring to the load may lead to damages to the output element of the digital flow switch.

14 13 9. Maintenance 9. Maintenance WARNING DO NOT remove the back cover. The products uncovered by customers shall be out of our guarantee. When assembling 1000, 1002, 1200, 2000, 5000, and 5002, moderately apply grease to the Oring of the rotor cap. Silicone grease or teflon grease is recommended. When assembling 1500 and 2500, DO NOT apply grease to the Oring of the rotor cap. If greasing is absolutely necessary, use grease appropriate for the fluid used. Check that the product can be operated correctly after disassembly and assembly. Otherwise, unexpected malfunction may occur, causing impossibility of safe operation. Extreme care should be taken when using this product in the interlock circuit. In such a case, provide the multiple interlock circuit in case of malfunctions, and perform periodic checks to ensure that the product can be correctly operated. NEVER remove the cover, nor provide any modification on the product. CAUTION Precautions for maintenance (disassembly and assembly of rotor part) Precautions for maintenance (disassembly and assembly of rotor part) If iron particles are remained attached to the rotor magnet part at disassembly, the sensor may not detect the magnet. In such a case, it is recommended to select the iron proximity type (500 ) flow switch. <Disassembly and assembly method> The rotor cap, rotor, and rotor pin can be easily disassembled by inserting the attached rotor cap opener into the groove on the rotor cap, and turning it counterclockwise. When assembling, securely screw the rotor cap in to the contact surface. Insufficient screwing may lead to fluid leak or faulty detection. Rotor housing Body Cover Rotor pin Note Disassemble the product periodically, and clean the rotor, rotor pin, and rotor housing inside (by removing iron particles and scale). Also, ensure that the parts are free from damages. The parts contacting fluid are consumables. If any damage is found by check, immediately replace the damaged part. Rotor cap Rotor cap opener (accessory) Rotor <List of parts contacting fluid> Name Material Type 1000 Polyether sulfon DFRCP Rotor cap Rotor Rotor pin SUS316 DFRCS Polyacetal ETFE Polyacetal Alumina ceramic DFRP DFRF DFRS DFPS

15 10. Setting method and fluid Setting method and fluid WARNING Be sure to use the flow switch within the set flow range. The set flow range varies depending on the viscosity and temperature of the fluid used. It is recommended to provide abnormal flow rate for the actual product when setting the trimmer. Only water shall be used as the measurement fluid used for this flow switch. Remember that the accuracy of our products cannot be guaranteed if they are used with other fluids. DO NOT use flammable fluids. If foreign matter may enter the fluid used, set the filter to the primary side. Setting it to the rotor part of the flow switch will lead to incorrect measurement. Check the pressure reducing valve and flow control valve before flowing the fluid. Application of pressure or flow exceeding the rated values may cause damages to the product. <Flow setting method> In the case that the flow meter is used (or abnormal flow variation is actually provided) (1) Adjust the flow in the pipe to the set flow. (2) Then, turn the flow setting trimmer located on the front side of the flow switch with a flatblade screwdriver until the green output indicator lamp turns to red. In the case that the flow meter is not used (1) Find the trimmer setting scale percentage corresponding to the set flow in the lateral axis of the trimmer setting scale flow characteristics charts shown below. (2) Turn the flow setting trimmer located on the front side of the flow switch with a flatblade screwdriver, and adjust it to the percentage selected with the chart. (3) On the contrary, if the flow meter is unavailable and the flow is required to be known, the approximate flow can be obtained by the percentage at the time that the output indicator lamp color changes. Note) It is necessary to prevent unnecessary alarm output, considering fluctuations in normal flow. Trimmer setting scale flow characteristics charts Setting method and fluid 1002, 5002 (Small flow type) 1000, 1200, 1500, 5000 (Medium flow type) Range B Range A Trimmer setting scale (%) Trimmer setting scale (%) A Flow (L/min) Set flow range (specification) L/min Set flow range (specification) Flow (L/min) Flow range A : 0.5 5L/min Flow range B : L/min 2000, 2500 (Large folw type) Trimmer setting scale (%) Flow (L/min) Set flow range (specification) L/min

16 Setting method and fluid <Flow pressure loss characteristics charts> (Small flow type) Secondary side pressure (MPa) (Medium flow type) Secondary side pressure (MPa) Flow (L / min) (Large flow type) Secondary side pressure (MPa) Range A Flow (L / min) Primary side pressure: 0.2 MPa Primary side pressure: 0.3 MPa Primary side pressure: 0.15 MPa Flow (L / min) A Range B Using charts / These charts are used to find the pressure loss of the Digital Flow Switch Series. Example: How much the pressure loss when water is flowed by 20 L/min using the flow ranges B of the 1000, 1200, 1500, and 5000? Answer: When the intersection point of flow 20 L/min and the flow curve is A, find the secondary side pressure at the point A. where, (Pressure loss) = (Primary side pressure) (Secondary side pressure) = 0.3 MPa 0.25 MPa = 0.05 MPa Accordingly, when water is flowed by 20 L/min, the difference in the pressures primary and secondary side of the flow switch is 0.05 MPa, and this means that the primary side pressure (pump discharge pressure) must be 0.05 MPa or more. However, in actuality, the pressure loss in the whole piping must be determined to find the pump discharge pressure. Note: The characteristics vary depending on the viscosity and temperature of the fluid used.

17 11. Others / 12. Specifications Others WARNING Measurement shall be performed after supplying power to the flow switch and the alarm signals are output for 0.5 seconds. Be sure to stop the control system before setting. The alarm output is set to the OFF status while power is not supplied. 12. Specifications Other precautions Flow type Small flow Medium flow Large flow Body type Detection system Resin body Magnetic proximity/ iron proximity Resin body Magnetic proximity/ iron proximity Metal body Stainless steel body Metal body Stainless steel body Magnetic proximity Model 1002/ / Body material Polyacetal (w / glass) Polyacetal (w / glass) BC6 (w / nickel plated) SCS 14 BC6 (w / nickel plated) SCS 14 Fluid used Water Port size Pressure range Proof test pressure Ambient temperature Fluid temperature Flow range Accuracy Hysteresis Alarm output response time Installing direction Flow direction Number of output Rated power supply Rc3/8 Rc3/ MPa 1MPa 0 C(32 F) +50 C(122 F) (free from dew condensation) 0 C(32 F) +70 C(158 F) (free from freezing) 0.2~2.5 L/min Flow range A: L/min, flow range B: L/min L/min ± 20%fs ± 5%fs 5% or less Approx. 500 ms Free Both directions 7% or less 1c contact relay output x 1 pos. or transistor output x 2 pos. (OUT HIGH, OUT LOW 1 each) 24 V DC or 100 V AC Note) Be sure to use this product within the specified flow range. The values shown in the table above are obtained when tap water (20 C / 68 F) is used for measurement. The flow range varies depending on the viscosity of measured fluid. Electric specifications / Common Power supply voltage Allowable voltage range Power consumption Cable Frequency output System 24V DC 100V AC ± 10% (absolute max. rating 30 V DC) ± 10% 700 mw or less 3 VA or less VCTF 8core 0.3 mm 2 Power supply: VCTF 3core 0.5 mm 2 1 m 1 m Power supply: VCTF 5core 0.5 mm 2 1 m System Max. allowable voltage Load current Photocoupler output 50 V DC Output specifications / Transistor output 4 ma (output residual voltage must be 0.5 V or less) Photocoupler x 2 (OUT HIGH / OUT LOW) OUT HIGH: set to the ON status when the flow is higher than the set value OUT LOW: set to the ON status when the flow is lower than the set value Output specifications / Relay output Contact configuration Rated control capacity (resistance load applied) Max. allowable power (resistance load applied) 1c x 1 (Relay is tripped when the flow reaches the set value or lower) 30 V DC 5A / 250 V DC 5A 150 W (DC) / 1250 VA (AC) Max. allowable voltage 125 V DC / 300 V AC Max. current 5A Min. conforming load 5V DC 10 ma Contacttocontact insulation resistance 1000 M Ω or more with 500 V DC insulation resistance Contacttocontact withstand voltage 1000 V AC/minute Electric service life 100,000 times or more (rated load, switching frequency: 30 times/minute) Max. allowable voltage Load current 50 V DC 10 ma (output residual voltage must be 0.8 V or less)

18 Outside Dimensions Outside dimensions Unit: mm DC24V 2lamps type LED Normal status: (Green) Abnormal status: (Red) Flow setting trimmer (270 ) M5x0.8 depth 6 (Mounting screw) Flow range A 2Rc 3/8 Flow range B 2Rc 3/8 Cable (VCTF 8core 0.3 mm 2, length 1 m) Mounting dimensions of piping adapter set (DFAP) DC24V A Mounting dimensions of small flow type adapter set (DFFW2) DC24V Vnotch for identification In the case that water is flowed in this direction 2M5x0.8 depth 6 (Mounting screw) Piping adapter 2Rc 3/8 Note) The outside dimensions of these models are same as those of the models above, though the appearances are not identical. Piping adapter Rc 3/8 2M5x0.8 depth 6 (Mounting screw) Small flow nozzle Note) The flow range A is used for the small flow type. Small flow piping adapter Rc 3/8 1500DC24V AC100V Cable (VCTF 3core 0.5 mm 2 length 1 m) Note) The outside dimensions of these models are same as those of the models above, though the appearances are not identical. 22 Cable (VCTF 5core 0.5 mm 2 length 1 m) Piping adapter (related part) 19 R3/8 Rc(PT)3/8 Small flow piping adapter (related part) 19 R3/8 Rc(PT)3/8 HEX24 HEX24

19 13. Outside Dimensions 18 Outside dimensions Unit: mm DC24V 2lamps type LED Normal status: (Green) Abnormal status: (Red) Flow setting trimmer (270 ) M6x1 depth 8 (Mounting screw) Rc3/4 Cable (VCTF 8core 0.3 mm 2, length 1 m) 2500DC24V AC100V Cable (VCTF 3core 0.5 mm 2, length 1 m) Note) The outside dimensions of these models are same as those of the models above, though the appearances are not identical. Cable (VCTF 5core 0.5 mm 2, length 1 m) 22