CKD WKF2 Series User Manual

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FLUEREX (Karman vortex ow rate sensor for water)
WFK2 Series
Flow rate range: 0.4 to 5, 1.6 to 20, 4 to 50, 8 to 100, 20 to 250 L/min
Specications
Descriptions WFK2-005 WFK2-020 WFK2-050 WFK2-100 WFK2-250
Connection
Port size Rc, G, NPT 3/8, 1/2, 3/4 1, 1 1/4, 1 1/2
Port material Stainless steel: SUS304
Working conditions
Applicable uid Pure water, industrial water
Max. working pressure MPa 1.0
Proof pressure MPa 1.5
Manual valve internal leakage mL/min 0 No manual valve settings
Manual valve allowable
back pressure MPa
0.3 No manual valve settings
Ambient temperature °C 0 to 50 (85% RH or less, no condensation)
Fluid temperature °C 1 to 95
Flow rate
Flow rate range L/min 0.4 to 5 1.6 to 20 4 to 50 8 to 100 20 to 250
Repeatability (*1) Analog accuracy: ±2.5%F.S. Display accuracy: ±2.5%F.S. ±1 digit (min. display unit)
Temperature characteristics (*1) ±5%F.S. (base temperature 25°C, 10 to 50°C)
Low ow cut 5% of F.S.
Integrating ow range 99,999 L or 99,999 m
3
(unit selectable), reset when the power is turned off.
Integrated pulse rate L/pulse 0.1, 0.5, 1 0.1, 0.5, 1, 10 0.5, 1, 10, 50 1, 10, 50, 100 10, 50, 100
Pressure loss MPa 0.07 (at F.S.) 0.05 (at F.S.) 0.05 (at F.S.) 0.05 (at F.S.) 0.03 (at F.S.)
Response time (*2) sec 0.25, 0.5, 1, 5, 10 (Initial value 1)
Temperature
Measurable temperature range °C 0 to 100
Accuracy
Less than 50: analog accuracy ±2, display accuracy ±2 ±1 digit (min. display unit 1)
50 to 100: analog accuracy ±3, display accuracy ±3 ±1 digit (min. display unit 1)
Output
Display Two-screen LCD display, instantaneous ow rate: 3 digits, water temperature: 2 digits, integrating ow: 5 digits, with screen rotation
Analog output (*3) Standard: 0 to 5 VDC/1 to 5 VDC, option: 4 to 20 mA DC, 0 to 10 VDC/1 to 10 VDC
Switch output NPN or PNP transistor open collector output (can be switched from settings)
Max. load current 50 mA
Max. applied voltage 30 VDC
Internal voltage drop 2.0 V or less
Power supply voltage Analog output standard: 12 to 24 VDC ±10%, analog output option: 24 VDC ±10%
Current consumption (*4) 50 mA or less
Mounting
Mounting orientation Unrestricted in vertical/horizontal direction
Straight piping section None IN side: 10 D, OUT side: 5 D
Degree of protection IP65 or equiv.
Weight g
3/8 (Rc, G, NPT): approx. 320
1/2 (Rc, G, NPT): approx. 320
3/4 (Rc, G, NPT): approx. 400
1 (Rc, G, NPT): approx. 870
1 1/4 (Rc, G, NPT): approx. 1,010
1 1/2 (Rc, G, NPT): approx. 1,100
*1: Accuracy is the average value over 10 sec (for conditions not containing air bubbles). F.S. stands for full scale ow rate.
*2: The time to attain 70% of the original output after the normal ow rate (used) drops instantly to 0.
*3: Check the allowable load on the wiring method page.
*4: Current for when 24 VDC is connected, and no load is applied. The current consumption will vary depending on how the load is connected.

CKD WKF2 Series Specifications

General

Brand	CKD
Model	WKF2 Series
Category	Accessories
Language	English