To avoid injury, death of personnel ordamage to instrument, the operator must refer to an explanation in the User smanual.

Transcription

1 VF-3000 Flow Sensor M-1500 INSTRUCTION MANUAL Non-invasive Inline 1. NOTICE 1) This manual should be passed on to the installer and the operator of this product. 2) Please read this manual carefully undunderstand how to install the product. If any question arises, contact your sales agent or Malema sensors before starting operations. 3) Malema sensors reserves the right to make design refinements that may not be reflected in this manual. 4) The information and specifications in this manual are subject to change without prior notice. 5) If this instrument is used in a manner not specified in this manual, the protection provided by this nstrument may be impaired. 6) The following symbols are used on this instrument. Symbol Description To avoid injury, death of personnel ordamage to instrument, the operator must refer to an explanation in the User smanual Direct current 2. Inspection of the Product On delivery, check the flowmeter for damage, possibly due to improper shipping conditions. Con - firm that the model code on the data plate match your purchase order. 3. Storage 1) Store the flowmeter without unpacking it if possible. 2) Select a storing place free of water, moisture, corrosive atmospheres, impact shock and vibration. 3) Ambient temperature should be between 0 C (32 F) and +50 C (122 F), and humidity between 5 and 90 % R.H. without condensation - preferably around 25 C(77 F) and 65 % R.H.. 4) If a used flowmeter must be stored, completely drain liquid and wash the meter body. 4. General The VF-3000 Flow Sensor offers a cost-effective instrument for the measurement of liquid flow. simple and clean design makes the VF-3000 a good choice for the measurement of ultra-pure water, DIW(de-ionized water) in semiconductor manufacturing plants. Page 1

2 Features Simple and Compact Design The VF-3000 Flow Sensor is assembled with a few pieces of components. The sensor body and Shedder bar (generator) are molded as one component. Designed for Cleanness Sensor body is made of New PFA (420HP-J) and is designed to eliminate deposits. No Maintenance Cost Since the VF-3000 has no moving parts,no maintenance is needed. Low Pressure Loss A combination of straight flow path and Shedder bar gives a lower pressure loss compared with other types of flowmeters. Linear Output Output signal is proportional to a volumetric flow rate. CE Marking The VF-3000 meets the EC directive for CE marking. Operating Principle A bluff body or Shedder bar in the flow generates a street of vortices downstream. The VF-3000 Flow Sensor measures the flow rate by counting the number of vortices with a piezo electric sensor. Piezoelectric element Shedder bar Sensor Vortices Figure Precautions for Installation 1) The fluid to be measured should be clean low viscosity liquid, such as water, pure water, noncorrosive chemicals. 2) Ambient temperature should be from 0 C (32 F) to 50 C (122 F). Protect a flowmeter from the direct sun light and heat radiation as well as freezing. 3) Do not install the flowmeter close to electromagnetic noise sources such as pumps, motors, or solenoid valves. If unavoidable, protect the Flow meter with magnetic Shield. 4) Avoid mechanical vibration as far as possible. 5) Check flow direction and make sure the tube is completely filled with liquid. The flow direction of flowmeter is indicated with an arrow mark mold ed on the meter body. 6) When fluid may contain some air bubbles and flow rate is relatively low, we recommend a verti cal piping with upward flow for the installation of flowmeter. Air bubbles may stay in a horizontal piping and cause measurement errors. 7) A flow control valve should be installed in the downstream side of the flowmeter for stable measurement. The line pressure at the Flowmeter should be 50 kpa (7psig) or higher. 8) Do not carry a flowmeter by holding its signal cable; the termination of the cable can be broken. 9) Do not conduct an insulation resistance test or dielectric strength test; the electronics of flowmeter can be damaged by the test. 10) Use the flowmeter within the operating pres sure shown in the diagram below. Fluid Pressure and Temperature Range Fluid Pressure Mpa OPERATING RANGE Fluid Temperature o C Figure 2. Page 2

3 6. Installation 6.1 Cautions 1) The VF-3000 Flowmetere is made of plas tics. Do not apply an excessive force to the meter body at the time of installation. Current Output Model (VF-301 ) [Brown] [Black] 10.8 to 26.4 V ) To keep the accuracy of measurement, the straight tube section is required as follows. Model Straight tube section (mm) Upstream Down stream VF-30 1 Elbow Control valve Expander VF No straight section is required VF to 20 ma [Blue] Figure 3. Display / Current Output Model (VF-303 ) 6.2 Connection 1) Tube end type : Follow the instruction provided by the fitting manufacturer. When heating is specified, do not apply the heat to the meter body. Model Conn. Tube size Dimensions O.D.(mm) I.D.(mm) VF / VF / VF-3021 VF / VF / ) Fitting type : The fitting of the flowmeter is male-screwed. Use the attached parts kit to connect tubes. When you tighten the nut, hold the base of male screw with a wrench to avoidan exces sive torque in the meter body. (Specially designed tools are available from fitting manufacturers.) Load Resistance Range for current Output Model Load resistance (Ohm) Operating range (V---) Power Supply Voltage Figure 5. Pulse Output Model [Brown] (VF-302 ) 7. Wiring When wiring the cable, use the crimp-style terminals or solder the wires to the terminals in order to secure the connection. [Black] [Blue] Pulse Out Shield 10.8 to 26.4 V ---- Figure 6. Page 3

4 8. Operation 1) After checking the connections for leakage, open the valve slowly to start operation. 2) In the beginning, indication may fluctuate due to the air entrapped in the tube. Release all air bubbles by closing and opening the valve several times. 3) Check the tightness of connections for a short period after starting operation. Tighten the nuts if necessary. 4) When cleaning the body or any other part of the instrument, use a soft and dry cloth always. 5) The customer s repair of the flowmeter shall void the guarantee. In case of troubles or repair, please contact the agent from whom this flowmeter was purchased or our sales office for send back repair. Caution Avoid a sharp increase in flow rate or pressure, which may damage the flowmeter. 9. Construction [ VF-301, VF-302 ] Part no. 3 4 Flow 1 Sensor body 2 Tube Name 3 Shedder bar (cast with Sensor body) 4 Sensor 5 O-ring 6 Cover 7 Signal processing board 8 Cable 9 Insulation material Figure 7. Page 4

5 10. Alarm Point Value Setting Procedure Normal Operation Press SET button more than 3 seconds. Selection of Alarm-1 output mode AL 1 AL 2 L/Min Select output mode by pressing or button. Press SET button. Input set point value for Alarm-1 Selection of Alarm-1 output mode 1-P : ON; Flow rate Set point 1-n : ON; Flow rate Set point 1-F : OFF Change set point value by pressing or button Press SET button. Selection of Alarm-2 output mode Select output mode by pressing or button Press SET button. Input set point value for Alarm-2 Change set point value by pressing or button Press SET button. Writing to EEPROM Normal Operation Selection of Alarm-2 output mode 2-P : ON; Flow rate Set point 2-n : ON; Flow rate Set point 2-F : OFF Page 5

6 11. Specifications Measurable Fluid: Ultra-pure water, Water Accuracy: ± 3 % F.S. Additional Error for LED Display: ± 1 digit Repeatability: ± 0.5 % Fluid Temperature: 0 to 90 C (32 to 194 F) (VF-303 ; Refer to Figure. 8) Fluid Pressure: 0 to 0.5 MPa (Refer to Figure 2) Ambient Temperature: 0 to 50 C (32 to 122 F) (VF-303 ; Refer to Figure. 8) Ambient Humidity: 5 to 90% R.H. Altitude: 2000 m Fluid and Ambient Temperature Range (only for VF-303 ) 90 Fluid Temperature o C Figure 8. Operating range Power Supply: Rated Voltage; 12 to 24 V ---- Operating Voltage; 10.8 to 26.4 V ---- Rated Power; 1W (VF-301 ) 0.5W (VF-302 ) 2W (VF-303 ) Display (VF-303 ) : Flow Rate; 3-digit LED Alarm; 2 LED (Alarm-1, Alarm-2) Display resolution : VF3031; 0.01 L/min or 0.01 GPM VF3032; 0.1 L/min or 0.01 GPM VF3033; 0.1 L/min or 0.1 GPM Output : VF to 20 ma (3-wire) Load 0 to 250 ohms at 12V to 600 ohms at 24V---- (Refer to Figure 5.) VF-302 Unscaled pulse output Open collector, Max. 10 ma / 30V---- Max. frequency Approx. 590 to 870 Hz 50 VF to Ultrasonic 20 ma (3-wire) Flowmeter Load 0 to 250 ohms at 12V to 600 ohms at 24V---- (Refer to Figure 5.) Alarm output (2-point) Open collector, Max. 80 ma / 30V---- Hysterisis; equal to display resolution Damping Time Constant: 1 sec (63 % response) Enclosure Classification: IP64 (IEC 529) NEMA3S (CSA C22.2 NO.94) Cable: VF-301, VF mm2 x 3 C (AWG.24), 3 m Outside diameter 3.5 mm (Soldered end finish) VF mm2 x 5 C (AWG.24), 3 m Outside diameter 4.5 mm (Soldered end finish) Measurable Flow Range: Model Flow range (in case of water) L/min GPM VF to to 1 VF to to 4 VF to 40 1 to 10 Min. Straight Pipe Run: VF-30 1 (1/2 ) : 50 mm upstream VF-30 2 and VF-30 3 (3/4 ) : 80 mm upstream Process Connections: PFA Tube End (Standard) FLARETECK PILLAR [SUPER TYPE PILARFITTING] FINALLOCK Flowell (Refer to Table of Model Code) Materials: Wetted part Parts Cover Sensor Body Tube Sensor O-ring Cable sheath Material New PFA (420HP-J) New PFA (450HP) Piezoelectric element molded with New PFA (420HP-J) Perfluoro elastomer (PF) [Standard] Fluorine rubber (FKM) Ethylene propylene rubber (EPDM) Poly-butylene trephthalate (PBT) Heat-resistant PVC Page 64

7 Mass: Meter: 80 to 190 g (Mass changes depending on type of fitting) Cable: 75 g (90 g for VF-303 ) Safety Standard: CSA C22.2 NO Installation Category: II Pollution Degree: 2 Note: Overvoltage category (Installation category) describes a number which defines a transient overevoltage condition. It implies the regulation for impulse withstand voltage. II applies to electrical equipment which is supplied from the fixed installation like distribution board. Pollution degree describes the degree to which a solid, liquid, or gas which deteriorates dielectric strength or surface resistivity is adhering. 2 applies to normal indoor atmosphere. Normally, only non-conductive pollution occurs. occasionally, however, temporary conductivity caused by condensation must be expected 12. Model Code Model Code VF - 30 Type/Output Normal Size: Flow range : Connection Size O-ring Material Process Connection Flow unit 1 Current : 4 to 20 ma DC Description 2 Pulse : Open Collector (unscaled) 3 Display : Flow rate (3-digit LED) Alarm (2 LED) Current Output : 4 to 20 ma DC Alarm Output : Open collector (2 points) 1 6 mm : L/min or GPM; 1/2 (3/8 for VF-3031) 2 10 mm : 2-16 L/min or GPM; 3/ mm : 4-40 L/min or 1-10 GPM ; 3/4-0 Without O-ring(fused construction for sensor)* -P Perfluoro elastomer (PF) [Standard] -F Fluorine rubbe (FMK) -E Ethylene propylene rubber (EPDM) 0 PFA Tube End [Standard] 1 FLARTECK 2 PILLAR [SUPER TYPE PILLAR FITTING] 3 FINALLOCK 4 Flowell [20 series tube fittings] 5 Flowell [20A series tube fittings] 6 Flowell [60 series tube fittings] 7 PILLAR [SUPER 300 TYPE PILLAR FITTING] 1 L/min 2 GPM * The flow ranges available without o-ring are 0.3 to 2.5 l/min and 0.5 to 4 l/min Page 74

8 13. Outline Dimension VF VF VF [Tube end type] [Tube end type] h1 13 H1 VF VF [Fitting type] ±2 ød ød H h VF [Fitting type] ±2 ød ød 45 L ± 3 Flow 45 L ± 3 Flow Unit : mm Model Conn. Tube Size L / Model code Dimension D d H 1 h 1 H 2 h 2 VF / VF-3011 VF / VF / VF / Figure 9. Subjected to change without notice Page 84