KROHNE OPTISWIRL 4070 EN - Manual (Page 71)

TECHNICAL DATA
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OPTISWIRL 4070
www.krohne.com 02/2013 - 4000150606 MA OPTISWIRL4070C R07 en
Measuring accuracy
Reference condition Water at 20ºC
Air at 20°C and 1.013 bar abs.
Accuracy Based on volume flow
Liquids ± 0.75% of measured value (Re ≥ 20000)
± 2.0% of measured value (10000 < Re < 20000)
Gases and steams ± 1.0% of measured value (Re ≥ 20000)
± 2.0% of measured value (10000 < Re < 20000)
Pressure and temperature compensation: ±1.5% of measured value (Re ≥ 20000);
±
2.5% of measured value (10000 < Re < 20000)
Repeatability ± 0.1% of measured value
Long-term stability ± 0.01% of measured value
Operating conditions
Temperature
Product -40…+240°C / -40…+465°F
Ambient Non-Ex: -40…+85°C / -40…+185°F
Ex: -40…+60°C / -40…+140°F
Storage -50…+85°C / -58…+185°F
Pressure
Product Max. 100 bar / 1450 psi; Information on higher pressures on request.
Ambient Atmosphere
Chemical properties
Density Taken into consideration when sizing.
Viscosity < 10 cP
Reynold's number 10000...2300000
Recommended flow velocities
Liquids 0.3…7 m/s / 0.98…23 ft/s (optional up to 10 m/s / 32.8 ft/s taking cavitation into
account)
Gases and steams 2.0…80 m/s / 6.6…262.5 ft/s
DN15: 3.0…45 m/s / 9.8…148 ft/s; DN25: 2.0…70 m/s / 6.6…230 ft/s
For detailed information, see chapter "Flow tables".
Other conditions
Protection category IP 66/67
MA_OPTISWIRL4070C_R07_en_150606_PRT.book Page 71 Wednesday, February 13, 2013 2:47 PM