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Yokogawa UYFA21 Ultrasonic Vortex Flowmeter Manual

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9-1
IM 1F5B2-01E
9. STANDARD SPECIFICATIONS
9. STANDARD SPECIFICATIONS
9.1 STANDARD SPECIFICATION
Fluid to be Measured:Liquid
Measuring condition: Sound speed 500 to 2000 m/s
Be sure there are no bubbles in the flow.
Avoid severe sticky and slurry fluid meterings.
Do not use this meter where pulsating flow/pulsating pressure
exist.
Measurable Flow Rates: Refer to item 6.1.
Accuracy: ± 1.0% of reading
± 0.5% of reading is also available as an option.
(refer to item 6.1)
Note: The above shows the accuracy of pulse output. For analog
output, add up ± 0.1% of full scale to the above values.
Repeatability: ± 0.2% of reading
Process Temperature Range: –40 to 200 °C (–40 to 150 °C for 15A)
Process Pressure Limit: Up to flange rating.
Ambient Temperature Range:
–40 to 85 °C (general type)
–30 to 80 °C (with Indicator/Totalizer)
–40 to 75 °C (CENELEC Explosion proof type)
–20 to 60 °C (CENELEC Intrinsic safety type)
–20 to 60 °C (JIS Flameproof type)
(Model UYF200 is affected by fluid temperature. See Figure 9.1-2)
Ambient Humidity Range:5 to 100% Relative Humidity (at 40 °C)
(non-condensing)
Power Supply Voltage:10.5 to 42 V DC
(Refer to Figure 9.1-1 Relationship Between Power Supply
Voltage and Load Resistance)
Output signal:Analog, Pulse
Both Analog and Pulse output can be obtained simultaneously.
In this case refer to the item 5.5.
Analog: 4 to 20 mA DC, 2-wire system.
Pulse: transistor contact (open drain), 3-wire system.
Contact rating: 30 V DC, 120 mA DC
Low level: 0 to 2 V DC.
Pulse frequency: Max. 6 kHz
Duty cycles: Approx. 50% (1:2 to 2:1)
Dumping time constant: 0 to 64 Sec (can be set in 8 steps)
Delay time: 0.5 Sec
Analog output circuit time constant: 0.3 Sec
… 69 …


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