Flow Switches Series PF2 , IF ZSE ISE Digital Flow Switch PSE Digital Flow Switch for Air: Series PF2A ********************************************************* Refer to page 16-11-7. Digital Flow Switch for Water: Series PF2W *************************************************** Refer to page 16-11-17. Digital Flow Switch for Deionized Water and Chemicals: Series PF2D ****** Refer to page 16-11-37. Z I SE3 PS Z I SE 12 ZSP ISA2 Mechanical Flow Switch IS Diaphragm Style Flow Switch: Series IFW Model Flow rate measuring range (l /min) Contacts Port size (Rc, NPT, G) Page IFW510 IFW520 IFW550 1 to 10 10 to 20 20 to 50 1ab 3/8, 1/2, 3/4 16-12-1 ZSM PF2 IF Data Paddle Style Flow Switch: Series IF3 Model Flow rate measuring range (l /min) Contacts Port size (Rc, NPT, G) Page 1F30 1F31 1F33 14 to 60 20 to 150 36 to 2600 1ab 3/4 1 1 16-12-6 16-11-1 Flow Switches Precautions 1 Be sure to read before handling. Design and Selection Warning 1. Make sure to use a switch by the specified voltage. Use of a switch outside the range of the specified voltage can cause not only malfunction and damage of the switch, but also electrocution and fire. 2. Never use such a load, which exceeds the maximum allowable load. Mounting Warning 1. Mount a switch by observing the proper tightening torque. When a switch is tightened beyond the specified tightening torque, a switch may be damaged. On the other hand, tightening below the specified tightening torque may cause the installation screws to come loose during operation. It may result in a damage to a switch. 3. Since the type of fluid varies depending on the product, make sure to verify the specifications. Never use flammable gases or fluids, since the switch is not explosion proof construction. It may result in a fire. [For air] 4. Make sure to use a switch within the specified flow rate for measurement and the maximum operating pressure. Operating beyond the specified flow rate and operating pressure can damage the switch. If using a switch by exceeding the maximum operating pressure, switch is damaged. [For water] 5. Make sure to use a switch within the specified flow rate for measurement and the maximum operating pressure. Operating beyond the specified flow rate and operating pressure can damage the switch. Damage to the switch may occur if the switch is subject to higher pressure than its designed limit. Avoid especially the application of pressure above specifications through a water hammer. <Countermeasure examples> a) Use a device such as a water hammer relief valve to slow the valve's closing speed. b) Absorb an impact pressure by using a rubber material piping such as a rubber hose and an accumulator. c) Keep the piping length as short as possible. Thread 1/8 1/4 3/8 1/2 3/4 1 Proper tightening torque (N*m) 7 to 9 12 to 14 22 to 24 28 to 30 28 to 30 36 to 38 2. Apply a wrench only to the metal part of the piping when installing the flow switch in the system piping. Do not apply a wrench to the plastic part of the main housing of the switch. 3. Monitor the flow direction of the fluid. Install a switch in the direction as indicated on the body. 4. Remove solid foreign objects, etc. inside piping by air blow before connecting a switch with piping. 5. Do not drop or bump. Do not drop, bump, or apply excessive impacts (490 m/s2) while handling. Although the external body of the switch (switch case) may not be damaged, the inside of the switch could be damaged and cause a malfunction. 6. Hold the body of a switch when handling. The tensile strength of the cord is 49 N. Applying a greater pulling force on it can cause a malfunction. When handling, hold the body of the switch--do not dangle it from the cord. 7. Do not use until you can verify that equipment can operate properly. Verify whether it is mounted correctly by running fluids or applying the electricity in order to conduct suitable function and leakage tests when mounting for the first time or after system repair or modification was made. [For air] 8. Ever mount a switch in a place that will be used as a scaffold during piping. If an excessive weight is applied on a switch, switch may be damaged. 9. Be sure to allow straight pipe length that is minimum 8 times the port size upstream and downstream of the switch piping. Do not suddenly narrow the pipe size because doing so will disturb the flow speed distribution in the pipe, making it impossible to obtain the correct measurements. [For water] 10. Never install a switch in such a place, where switch is used as a foothold in the piping. Damage may occur if an excessive load is applied to the switch. Especially when the switch supports the piping, do not apply a load of 15 N*m or more to the metal parts of the switch. 16-11-2 Flow Switches Precautions 2 Be sure to read before handling. Wiring Fluid Warning Warning 1. Verify the color and terminal number when wiring. Incorrect wiring can cause a switch to be damaged and may result in a malfunction. Verify the color of wiring and the terminal number in the instruction manual when wiring. 2. Avoid repeatedly bending or stretching the lead wire. Repeatedly applying bending stress or stretching force to the lead wire will cause it to break. 3. Confirm proper insulation of wiring. Make sure that there is no wiring insulation (contact with other circuits, ground fault, improper insulation between terminals, etc.). Overcurrent is flown and may result in a damage. Operating Environment Warning 1. Never use in an environment, where explosive gases are used. The switches do not have an explosion-proof rating. Never use in an environment, where explosive gases are used, as this may cause a serious explosion. 1. Check regulators and the flow adjustment valves before introducing the fluid. If pressure or flow rate beyond the specified range are applied to the switch, the sensor unit may be damaged. [For air] 2. Fluids for measurement for this digital flow switch are nitrogen and air. Please note that accuracy cannot be guaranteed when other fluids are used. 3. Never use flammable fluids. 4. Install a filter or mist separator on the upstream side when there is a possibility of condensate and foreign matter being mixed in with the fluid. The rectifying device built into the switch will be clogged up and accurate measurement will no longer be possible. [For water] 5. Never use flammable fluids. 6. Install a filter in the inlet side when it is likely for solid foreign objects to get mixed with fluids. ZSE ISE PSE Z I SE3 PS Z I SE 12 ZSP ISA2 IS ZSM PF2 IF 2. Mount a switch in such locations, where no vibration or shock (less than 98 m/s2) is affected. [For air] 3. Use the switch within the specified fluid and ambient temperature range. Data Fluid and ambient temperatures are 0 to 50C. Take measures to prevent freezing fluid when below 5C, since this may cause damage to a switch and lead to a malfunction. The installation of an air dryer is recommended for eliminating condensate and moisture. Never use a switch in an environment, where temperature changes drastically even within the allowable ambient temperature range. Maintenance Warning 1. Perform periodical inspections to ensure proper operation of the switch. Unexpected malfunctions and wrong operations may not secure the safety. 2. Use caution when using a switch for an interlock circuit. When a pressure switch is used for an interlock circuit, devise a multiple interlock system to prevent trouble or malfunctioning. Verify the operation of the switch and interlock function on a regular basis. 3. Do not disassemble or modify the main body. 16-11-3 Digital Flow Switch Series PF2A/PF2W For Air For Water Flow rate setting and monitoring are possible with the digital display. Two types for different applications Integrated and remote type displays Three types of output: Switch, accumulated pulse, and analog outputs. Switching from real-time flow rate to accumulated flow is possible. 1 2 3 ZSE ISE PSE Z I 4 5 Remote Type For Air Series PF2A Two independent flow rate settings are possible. PS Water resistant construction conforming to IP65 PF2W For Air For Water For High Temperature Fluid (Water 90C) IS 1 to 10 5 to 50 10 to 100 20 to 200 50 to 500 150 to 3000 300 to 6000 600 to 12000 0.5 to 4 2 to 16 5 to 40 10 to 100 0.5 to 4 2 to 16 5 to 40 ZSM PF2 IF Data Flow control of cooling water for wafer temperature regulation and high frequency electric power supply Flow control of pressurized cooling water for welding gun Main line flow control 100 l /pulse The accumulated pulse output function (100 l/pulse) enables remote monitoring of accumulated flow. M/C A Make possible the monitoring of air flow from the main line to each branch line. SE 12 ISA2 Application examples Flow control of N2 gas to prevent detection camera shimmering and lead frame oxidation Z I ZSP Flow rate measurement range ( l /min) Integrated Type For Water Series 6 SE3 COM B COM DC12V GND F.G. R.S. HOLD COM BANK1 BANK2 MULTI COUNTER:CEU5 M/C COUNT PRESET FUNC. UP RIGHT LEFT DOWN MODE SEL. AC100~240VCOM OUT1OUT2OUT3OUT4OUT5S.STOP RD M/C SET SD SG RS-232C Pulse counter Flow control for each branch line 16-11-5 P. 16-11-7 For Air 50 l/min 10 l/min Integrated display type PF2A710 750 711 721 751 703H 706H 712H 500 l/min 200 l/min 100 l/min Remote type Display unit Sensor unit PF2A510 PF2A30 550 511 31 521 551 Flow rate measurement range l/min 1 to 10 12000 l/min 6000 l/min 3000 l/min Output specifications Switch output Analog output Port size (Rc, NPT, G) Accumulated pulse output 1/8 1/4 3/8 1/2 1 11/2 2 5 to 50 10 to 100 20 to 200 50 to 500 150 to 3000 - - 300 to 6000 600 to 12000 : Output from integrated display type and remote display unit type : Output from remote sensor unit type For Water P. 16-11-17 16 l/min 4 l/min 40 l/min Remote type Integrated display type Display unit Sensor unit PF2W704 720 740 711 PF2W504 PF2W30 520 540 33 511 Flow rate measurement range l/min 0.5 to 4 100 l/min Output specifications Switch output Analog output Accumulated pulse output Port size (Rc, NPT, G) 3/8 1/2 3/4 1 2 to 16 5 to 40 10 to 100 : Output from integrated display type and remote display unit type : Output from remote sensor unit type For High Temperature Fluid (Water 90C) P. 16-11-26 Integrated display type Remote type Display unit Sensor unit PF2W704T PF2W504T 720T PF2W30 520T 740T 540T Flow rate Port size (Rc, NPT, G) Output specifications measurement Accumulated Switch output Analog output 3/8 1/2 3/4 range l/min pulse output 0.5 to 4 2 to 16 5 to 40 : Output from integrated display type and remote display unit type : Output from remote sensor unit type 16-11-6 For details about certified products conforming to international standards, visit us at www.smcworld.com. Digital Flow Switch For Air Series PF2A How to Order Integrated display type PF2A7 10 01 ZSE ISE 27 PSE Flow rate range 10 50 11 21 51 1 to 10 l/min 5 to 50 l/min 10 to 100 l/min 20 to 200 l/min 50 to 500 l/min Thread type Nil N F Rc NPT G Wiring specifications Nil 3 m lead wire with connector Without lead wire N Port size Flow rate (l/min) Port Symbol size 10 50 100 200 500 01 1/8 02 1/4 03 3/8 04 1/2 Applicable model Output specifications PF2A711, PF2A721 PF2A751 Z I Nil With unit switching function Fixed SI unit Note) M PS Note) Fixed unit: Real-time flow rate: l/min Accumulated flow: l Output specifications Applicable model 27 NPN open collector 2 outputs PF2A710, PF2A750 PF2A711, PF2A721, PF2A751 67 PNP open collector 2 outputs PF2A710, PF2A750 PF2A711, PF2A721/PF2A751 Symbol PF2A710, PF2A750 Unit specifications Specifications Model Output Note 4) specifications Measured fluid Flow rate measurement range Set flow rate range Flow rate measuring range Minimum set unit Accumulated pulse flow rate exchange value (Pulse width: 50 ms) Note 1, 2) Real-time flow rate Display unit Accumulated flow Operating fluid temperature Linearity Repeatability Temperature characteristics Current consumption (No load) Weight Note 3) Port size (Rc, NPT, G) Detection type Display Operating pressure range Proof pressure Accumulated flow range Switch output Resistance Accumulated pulse output Indicator light Response time Hysteresis Power supply voltage Enclosure Operating temperature range Withstand voltage Insulation resistance Vibration resistance Impact resistance Noise resistance PF2A710 PF2A750 0.5 to 10.5 l/min 2.5 to 52.5 l/min 0.5 to 10.5l /min 2.5 to 52.5 l/min 1 to 10 l/min 5 to 50 l/min 0.1 l/min 0.5 l/min 0.1 l/pulse 0.5 l/pulse l/min, CFM x 10-2 PF2A711 Air, Nitrogen 5 to 105 l/min 5 to 105 l/min 10 to 100 l/min 1 l/min 1 l/pulse 3 PF2A721 10 to 210 l/min 10 to 210 l/min 20 to 200 l/min 2 l/min 2 l/pulse l/min, CFM x 10-1 PF2A751 25 to 525 l/min 25 to 525 l/min 50 to 500 l/min 5 l/min 5 l/pulse -1 l, ft x 10 0 to 50C 5% F.S. or less 1% F.S. or less 2% F.S. or less 3% F.S. or less (15 to 35C, based on 25C), 5% F.S. or less (0 to 50C, based on 25C) 150 mA or less 160 mA or less 170 mA or less 250 g 290 g 1/8, 1/4 3/8 1/2 Heater type 3-digit, 7-segment LED -50 kPa to 0.75 MPa -50 kPa to 0.5 MPa 1.0 MPa 0 to 999999 l Maximum load current: 80 mA; Internal voltage drop: 1 V or less (With load current of 80 mA) NPN open collector Maximum applied voltage: 30 V; Two outputs Maximum load current: 80 mA NPN open collector Internal voltage drop: 1.5 V or less (With load current of 80 mA); Two outputs NPN or PNP open collector (same as switch output) Lights up when output is ON OUT1: Green; OUT2: Red 1sec. or less Hysteresis mode: Variable (can be set from 0), Window comparator mode: 3-digit fixed Note 5) 12 to 24 VDC (Ripple 10% or less) IP65 Operating: 0 to 50C, Stored: -25 to 85C (No condensation or freezing) 1000 VAC for 1 min. between external terminal and case 50 M (500 VDC) between external terminal and case 10 to 500 Hz at whichever is smaller: 1.5 mm amplitude or 98 m/s2 acceleration, in X, Y, Z directions for 2 hrs. each (De-energized) 490 m/s2 in X, Y, Z directions 3 times each 1000 Vp-p, Pulse width 1 s, Rise time 1 ns Note 1) For digital flow switch with unit switching function. (Fixed SI unit [(l/min, or l, m3 or m3 x 103)] will be set for switch type without the unit switching function.) Note 2) Flow rate display can be switched between the basic condition of 0C, 101.3 kPa and the standard condition (ANR) of 20C, 101.3 kPa, and 65% RH. Note 3) Without lead wire. Note 4) Switch output and accumulated pulse output can be selected during initial setting. Note 5) Window comparator mode -- Since hysteresis will reach 3 digits, keep P_1 and P_2 or n_1 and n_2 apart by 7 digits or more. (In case of output OUT2, n_1, 2 to be n_3, 4 and P_1, 2 to be P_3, 4.) Note 6) The flow switch is comformed to CE mark. 16-11-7 Z I SE3 SE 12 ZSP ISA2 IS ZSM PF2 IF Data Series PF2A Flow Characteristics (Pressure loss) PF2A710/510 PF2A750/550 3.0 0.8 0.6 0.4 0.2 10 Pressure loss (kPa) Pressure loss (kPa) Pressure loss (kPa) 1.0 0 1 PF2A711/511 2.5 2.0 1.5 1.0 5 7.5 Flow rate (l/min) 10 0 PF2A721/521 6 4 2 0.5 2.5 8 5 10 15 20 25 30 35 40 45 50 Flow rate (l/min) 0 25 10 100 50 75 Flow rate (l/min) PF2A751/551 50 Pressure loss (kPa) Pressure loss (kPa) 20 15 10 5 0 20 40 30 20 10 50 100 150 Flow rate (l/min) 200 0 50 100 150 200 250 300 350 400 450 500 Flow rate (l/min) Sensor Unit Construction PF2A710/750 PF2A510/550 PF2A711/721/751 PF2A511/521/551 Component Parts No. q w e r t Description Attachment Seal Mesh Body Sensor Material ADC NBR Stainless steel PBT PBT Flow direction Component Parts No. q w e r t y Material ADC NBR PBT Stainless steel PBT PBT Description Attachment Seal Spacer Mesh Body Sensor Flow direction Operating Unit Descriptions Connectors LED Display RESET Buttons Press the and buttons simultaneously to activate the RESET function. This clears the unit when an abnormality occurs and resets the accumulated flow display to "0". Displays the real-time flow rate, accumulated flow, and set value. The mark blinks when the accumulated flow is being measured. Output (OUT1) Indicator: Green Lights up when OUT1 is ON. Blinks when an overcurrent error occurs on OUT1. UP SET OUT1 Output (OUT2) Indicator: Red 16-11-10 Connector Number of size pins Manufacturer Applicable series UP Button ( Button) Correns Corporation VA-4D Use this button to increase a set value. OMRON Corporation XS2 Yamatake Corporation PA5-4I M12 OUT2 DOWN Lights up when OUT2 is ON. Blinks when an overcurrent error occurs on OUT2. Connectors shown below are applicable (female contact). Contact each manufacturer for details. SET Button ( Button) Use this button to change a set value or any of the modes. DOWN Button ( Button) Use this button to decrease a set value. 4 Hirose Electric Co., Ltd. HR24 DDK Ltd. CM01-8DP4S Digital Flow Switch For Air PF2A Series Dimensions: Integrated Display Type for Air PF2A710/750 Internal circuit and wiring example to 67 98 82 60 58 1.6 1 OUT1 Main circuit 17 FLOW SWITCH UP 54 44 are terminal numbers. 6 OUT2 Load 4 2 SET OUT1 Black Load + 12 - 24 to VDC White 3 OUT2 Blue DOWN FOR AIR PF2A7--27(-M) 2-Port size 4-o4.5 Brown 24 40 50 Main circuit 4 PSE Z I SE3 PS Brown 1 (41.5) ZSE ISE OUT1 Black Load White OUT2 2 Load 3 Z I + 12 to - 24 VDC SE 12 ZSP ISA2 Blue PF2A7--67(-M) 42 IS 4 ZSM PF2 2-o3.4 IF 43 Flow direction Data PF2A711/721/751 64 23 116 88 1.6 Connector pin numbers 4 FLOW SWITCH 34 54 44 UP SET OUT1 OUT2 DOWN 1 FOR AIR 4-o4.5 3 2-Port size 40 50 30 2 Pin no. Pin description 1 DC (+) 2 OUT2 3 DC (-) 4 OUT1 73 (41.5) Flow direction 16-11-11 Series Digital Flow Switch Functions: PF2A, PF2W PF2A/PF2W Refer to the operation manual how to set and to operate. Flow rate measurement selection Real-time flow rate and accumulated flow rate can be selected. Up to 999999 of flow rate value can be accumulated. Unit switching Output types Real-time switch output, accumulated switch output, or accumulated pulse output can be selected as an output type. Real-time switch output ( ) For Air Display * Hysteresis mode Real-time flow rate Accumulated flow l/min l CFM x 10-2, CFM x 10-1 ft3 x 10-1 ON OFF P-2 P-1 High flow rate "P" * Window comparator mode H: Hysteresis H H ON High Flow Rate Type (For Air) Real-time flow rate Accumulated flow l/min l, m3, m3 x 103 CFM ft3, ft3 x 103, ft3 x 106 NO High Temperature Fluid Type (For Water) Display Real-time flow rate OUT1 Accumulated flow l/min l GPM gal (US) OFF Output mode * Hysteresis mode OUT2 is the same. YES OFF n-2 n-1 High flow rate GPM = gal (US)/min Note 1) Output mode is set to inverted output at the factory before NO shipment. Basic state: 0C, 101.3 kPa Standard state: 20C, 101.3 kPa, 65%RH (ANR) Switchable between these states. Flow rate measuring unit confirmation Accumulated switch output ( OFF OUT1 A current of more than Check the load and wiring 80mA is flowing to OUT1 for OUT1. Note 1) A current of more than Check the load and wiring 80mA is flowing to OUT2. for OUT2. Note 2) The setting data has changed for whatever reasons. PS Z I SE 12 ZSP The flow rate is over the flow rate measurement range (for air only). Key lock This function prevents incorrect operations such as changing the set value accidentally. Accumulation clearance This is to clear the accumulated value. Initialization of setting (Only for series PF2A7H) This is to restore the setting to the initial state when dispatched from the factory. ISA2 IS ZSM PF2 Data ) P-3 High flow rate Output mode ON Note 1) OFF "n" Perform the RESET operation, and reset all data again. Reduce the flow rate until it is within the flow rate measurement range, using Note 2) an adjustment valve. Note 1) Applicable for all integrated display types other than series PF2A7H and remote type sensor display units. Note 2) Only for series PF2A7H. Note 1) n-1 n-2 High flow rate ON Solution Note 1) OFF "P" Error correction Note 1) SE3 IF This function allows to confirm the accumulated flow rate when real-time flow rate is selected and to confirm the real-time flow rate when accumulated flow rate is selected. Note 2) * Window comparator mode H: Hysteresis H H ON "n" Flow rate conversion Contents P-1 P-2 High flow rate Z I ON Note) Fixed SI unit [l/min or l] will be set for the type without the unit switching function. LED display PSE YES CFM = ft3/min Display ZSE ISE n-3 High flow rate Note 1) Output mode is set to inverted output at the factory before shipment. Accumulated pulse output ( "P" ) ON OFF OUT1 Output mode 50 msec ON Note 1) "n" OFF Note 1) For digital flow switch with unit switching function. (Fixed SI unit [l/min, or l, m3 or m3 x 103] will be set for switch types without unit switching function.) Refer to the specifications of display unit for the flow rate value per pulse. 16-11-31 Series PF2A/PF2W Specific Product Precautions 1 Be sure to read before handling. Design and Selection Warning 1. Operate the switch only within the specified voltage. Use of the switch outside the range of the specified voltage can cause not only malfunction and damage of the switch but also electrocution and fire. 2. Do not exceed the maximum allowable load specification. A load exceeding the maximum load specification can cause damage to the switch. 3. Do not use a load that generates surge voltage. Although surge protection is installed in the circuit at the output side of the switch, damage may still occur if a surge is applied repeatedly. When a surge generating a load such as a relay or solenoid is directly driven, use a type of switch with a built-in surge absorbing element. 4. Since the type of fluid varies depending on the product, be sure to verify the specifications. The switches do not have an explosion proof rating. To prevent a possible fire hazard, do not use with flammable gases or fluids. 5. Monitor the internal voltage drop of the switch. When operating below a specified voltage, it is possible that the load may be ineffective even though the pressure switch function is normal. Therefore, the formula below should be satisfied after confirming the minimum operating voltage of the load. Supply - Internal voltage > Minimum operating drop of switch voltage of load voltage [For air] 6. Use the switch within the specified flow rate measurement and operating pressure. Operating beyond the specified flow rate and operating pressure can damage the switch. [For water] 7. Use the switch within the specified flow rate measurement and operating pressure. Operating beyond the specified flow rate and operating pressure can damage the switch. Avoid especially the application of pressure above specifications through a water hammer. <Examples of pressure reduction measures> a) Use a device such as a water hammer relief valve to slow the valve's closing speed. b) Absorb impact pressure by using an accumulator or elastic piping material such as a rubber hose. c) Keep the piping length as short as possible. 8. Design the system so that the fluid always fills the detection passage. Especially for vertical mounting, introduce the fluid from the bottom to the top. 9. Operate at a flow rate within the flow rate measurement range. If operated outside of the flow rate measurement range, the Karman vortex will not be generated and normal measurement will not be possible. 16-11-32 Design and Selection [Series PF2A7H] 10. Sudden increase of flow rate may destroy the flow sensor. Ensure to open/close the flow control valve not to exceed the maximum flow rate measurement values. Caution 1. Data of the flow switch will be stored even after the power is turned off. Input data will be stored in EEPROM so that the data will not be lost after the flow switch is turned off. (Data can be rewritten for up to one million times, and data will be stored for up to 20 years.) Mounting Warning 1. Mount switches using the proper tightening torque. When a switch is tightened beyond the specified tightening torque, the switch may be damaged. On the other hand, tightening below the specified tightening torque may cause the installation screws to come loose during operation. Thread Rc 1/8 Rc 1/4 Rc 3/8 Rc 1/2 Tightening torque Nm 7 to 9 12 to 14 22 to 24 28 to 30 Thread Rc 3/4 Rc 1 Rc 1 1/2 Rc 2 Tightening torque Nm 28 to 30 36 to 38 48 to 50 48 to 50 2. Apply wrench only to the metal part of the pipings when installing the flow switch onto the system piping. Do not apply wrench to anything other than the piping attachment as this may damage the switch. 3. Monitor the flow direction of the fluid. Install and connect piping so that fluid flows in the direction of the arrow indicated on the body. 4. Remove dirt and dust from inside the piping using an air blower before connecting piping to the switch. 5. Do not drop or bump. Do not drop, bump, or apply excessive impacts (490 m/s2) while handling. Although the external body of the switch (switch case) may not be damaged, the inside of the switch could be damaged and cause a malfunction. 6. Hold the body of the switch when handling. The tensile strength of the cord is 49N. Applying a greater pulling force on it can cause a malfunction. When handling, hold the body of the switch - do not dangle it from the cord. 7. Do not use until you can verify that equipment can operate properly. Following mounting, repair, or retrofit, verify correct mounting by conducting suitable function and leakage tests after piping and power connections have been made. 8. Avoid the mounting orientation with the bottom of the body facing up. The switch can be mounted in any way such as vertically or horizontally, however, avoid the mounting orientation with the bracket on the bottom of the body facing upward. Series PF2A/PF2W Specific Product Precautions 2 Be sure to read before handling. Mounting Warning Usage Warning [For air] 9. Never mount a switch in a place that will be used as a scaffold during piping. Damage may occur if an excessive load is applied to the switch. 10. Be sure to allow straight pipe length that is minimum 8 times the port size upstream and downstream of the switch piping. When abruptly reducing the size of piping or when there is a restriction such as a valve on the upstream side, the pressure distribution in the piping changes and makes accurate measurement impossible. Therefore, flow restriction measures such as these should be implemented on the downstream side of the switch. [For water] 11. Never mount a switch in a place that will be used as a scaffold during piping. Damage may occur if an excessive load is applied to the switch. Especially when the switch supports the piping, do not apply a load of 15 N*m or more to the metal part of the switch. 12. Be sure to allow straight pipe length that is minimum 8 times the port size upstream and downstream of the switch piping. When abruptly reducing the size of piping or when there is a restriction such as a valve on the upstream side, the pressure distribution in the piping changes and makes accurate measurement impossible. Therefore, flow restriction measures such as these should be implemented on the downstream side of the switch. When used with the downstream side open, be careful of the cavitation that is prone to occur. Wiring Warning 1. Verify the color and terminal number when wiring. Incorrect wiring can cause the switch to be damaged and malfunction. Verify the color and the terminal number in the instruction manual when wiring. 2. Avoid repeatedly bending or stretching the lead wire. Repeatedly applying bending stress or stretching force to the lead wire will cause it to break. 3. Confirm proper insulation of wiring. Make sure that there is no faulty wiring insulation (contact with other circuits, ground fault, improper insulation between terminals, etc.). Damage may occur due to excess current flow into a switch. 4. Do not wire in conjunction with power lines or high voltage lines. Wire separately from power lines and high voltage lines, avoiding wiring in the same conduit with these lines. Control circuits including switches may malfunction due to noise from these other lines. 5. Do not allow loads to short circuit. Although switches indicate excess current error if loads are short circuited, all incorrect wiring connections cannot be protected. Take precautions to avoid incorrect wiring. 1. When using a switch for high temperature ZSE fluid, the switch itself also becomes hot due to ISE the high temperature fluid. Avoid touching the PSE switch directly as this may cause a burn. Z I Operating Environment Warning SE3 PS 1. Never use in the presence of explosive gases. The switches do not have an explosion proof rating. Never use in the presence of an explosive gas as this may cause a serious explosion. Z I SE 12 ZSP 2. Mount switches in locations where there is no vibration greater than 98 m/s2, or impact ISA2 greater than 490 m/s2. 3. Do not use in an area where surges are IS generated. When there are units that generate a large amount of surge in the area around pressure switches, (e.g., solenoid type lifters, high frequency induction furnaces, motors, etc.) this may cause deterioration or damage to the switches' internal circuitry. Avoid sources of surge generation and crossed lines. 4. Switches are not equipped protection against lightning. with surge Flow switches are CE compliant; however, they are not equipped with surge protection against lightning. Lightning surge protection measures should be applied directly to system components as necessary. 5. Avoid using switches in an environment where the likelihood of splashing or spraying of liquids exists. Switches are dustproof and splashproof; however, avoid using in an environment where the likelihood of heavy splashing or spraying of liquids exists. Since the display unit of the remote type switches featured here is not dust or splash proof, the use in an environment where liquid splashing or spraying exists must be avoided. [For air] 6. Use the switch within the specified fluid and ambient temperature range. Fluid and ambient temperatures are 0 to 50C. Take measures to prevent freezing fluid when below 5C, since this may cause damage to the switch and lead to a malfunction. The installation of an air dryer is recommended for eliminating condensate and moisture. Never use the switch in an environment where there are drastic temperature changes even when these temperatures are operated within the specified temperature range. [For water] 7. Use the switch within the specified fluid and ambient temperature range. The fluid and ambient temperatures range for the switches is 0 to 50C (and 0 to 90C for high temperature fluid). Take measures to prevent freezing fluid when below 5C, since this may cause damage to the switch and lead to a malfunction. Never use the switch in an environment where there are drastic temperature changes even when these temperatures fall within the specified temperature range. 16-11-33 ZSM PF2 IF Data Series PF2A/PF2W Specific Product Precautions 3 Be sure to read before handling. Maintenance Measured Fluid Warning Warning 1. Perform periodical inspections to ensure proper operation of the switch. Unexpected malfunctions may cause possible danger. 2. Take precautions when using the switch for an interlock circuit. When a pressure switch is used for an interlock circuit, devise a multiple interlock system to prevent trouble or malfunctioning, verify the operation of the switch and interlock function on a regular basis. 3. Do not disassemble or perform any conversion work on flow switches. Measured Fluid Warning 1. Check regulators and flow adjustment valves before introducing the fluid. If pressure or flow rate beyond the specified range are applied to the switch, the sensor unit may be damaged. [For air] 2. The fluids that the switch can measure accurately are nitrogen and dry air. However, only dry air can be measured with the high flow rate type. Please note that accuracy cannot be guaranteed when other fluids are used. 3. Never use flammable fluids. The flow velocity sensor heats up to approximately 150C. 4. Install a filter or mist separator on the upstream side when there is a possibility of condensate and foreign matter being mixed in with the fluid. The rectifying device built into the switch will be clogged up and accurate measurement will no longer be possible. [For water] 5. The fluid that the switch can measure accurately is water. Please note that accuracy cannot be guaranteed when other fluids are used. 6. Never use flammable fluids. 7. Install a filter on the inlet side when there is a possibility of condensate and foreign matter being mixed in with the fluid. If foreign matter adheres to the switch's vortex generator or vortex detector, accurate measurement will no longer be possible. Others Warning 1. Since switch output remains OFF while a message is displayed after the power is turned on, start measurement after a value is displayed. 2. Perform settings after stopping control systems. When the switch's initial setting and flow rate setting are performed, output maintains the condition prior to the settings. With the 100, 200, and 500 l/min type switches for air, output turns OFF when the switch's initial setting and flow rate setting are preformed. 3. Do not apply excessive rotational force to the display unit. The integrated type display unit can rotate 360. Rotation is controlled by the stopper; however, the stopper may be damaged if the display unit is turned with excessive force. [For air] 4. Be certain to turn on the power when the flow rate is at zero. Allow an interval of 10 minutes after turning on the power, as there are some changes in the display. 5. Flow rate unit Switch measures at mass flow rates without being influenced by temperature and pressure. The switches use l/min as the flow rate indicator unit, in which the volumetric flow is substituted for mass flow at 0C and 101.3 kPa. The volumetric flow rate at 20C, 101.3 kPa, and 65% RH (ANR) can be displayed with the high flow rate type switches for air. Detection principle of digital flow switch for air Detection principle of digital flow switch for water A heated thermistor is installed in the passage, and fluid absorbs heat from the thermistor as it is introduced to the passage. The thermistor's resistance value increases as it loses heat. Since the resistance value increase ratio has a uniform relationship to the fluid velocity, the fluid velocity can be detected by measuring the resistance value. To further compensate the fluid and ambient temperature, the temperature sensor is also built into the switch to allow stable measurement within the operating temperature range. When an elongated object (vortex generator) is placed in the flow, reciprocal vortexes are generated on the downstream side. These vortexes are stable under certain conditions, and their frequency is proportional to the flow velocity, resulting the following formula. f=kxv f: Frequency of vortex v: Flow velocity k: Proportional constant (determined by the vortex generator's dimensions and shape). Therefore, the flow rate can be measured by detecting this frequency. Temperature compensation element Fluid velocity detection element 16-11-34 This flow switch uses l/min as the flow rate indicator unit. The mass flow is converted and displayed under the conditions of 0C and 101.3 kPa. The conversion conditions can be switched to 20C and 101.3 kPa with high flow type switches. Fluid Vortex generator Vortex detector Top view Series PF2A/PF2W Specific Product Precautions 4 Be sure to read before handling. Set Flow Rate Range and Rated Flow Rate Range Caution Set the flow rate within the rated flow rate range. The regulating flow rate range is the range of flow rate that can be set on the controller. The rated flow rate range is the range of flow rate that satisfies the specifications (accuracy, linearity, etc.) of the sensor. Although it is possible to set a value outside the rated flow rate range, the specifications will not be guaranteed even if the value stays within the regulating flow rate range. ZSE ISE <For Air: PF2A> Z I Sensor PF2A510 1 l/min 5 l/min 10 l/min 20 l/min 1 l/min Z I ISA2 52.5 l/min 10 l/min IS 100 l/min 105 l/min 5 l/min 20 l/min PF2A521 SE 12 ZSP 50 l/min 2.5 l/min SE3 PS 500 l/min 10.5 l/min 5 l/min PF2A511 200 l/min 10 l/min 0.5 l/min PF2A550 50 l/min Flow rate range 100 l/min PSE ZSM 200 l/min 210 l/min 10 l/min PF2 IF 50 l/min PF2A551 500 l/min 525 l/min 25 l/min <For Water: PF2W> Sensor PF2W504 PF2W504T PF2W520 PF2W520T PF2W540 PF2W540T PF2W511 Flow rate range 0.5 l/min 2 l/min 5 l/min 0.5 l/min 10 l/min 20 l/min 40 l/min 100 l/min 4 l/min 4.5 l/min 0.35 l/min 16 l/min 2 l/min 1.7 l/min 17l/min 5 l/min 40 l/min 45 l/min 3.5 l/min 10 l/min 7 l/min 100 l/min 110 l/min Rated flow rate range of sensor Set flow rate range of sensor 16-11-35 Data