Flowmetering Vortex flowmeters 3
Body material: Stainless Steel Body design conditions
Class 150
Class 300
Class 600
-200 °C (-328 °F) 280 °C (536 °F) -55 °C (-427 °F)
Minimum allowable temperature
Maximum process temperature
Minimum process temperature
-20 to +85 °C (-4 to +185 °F) -40 to +85°C (-40 to +185 °F)
Operating
Electronic ambient temperature range
Storage
Performance specifications Under reference conditions Accuracy
3.6 18
Mass flowrate accuracy for gas and steam based on 50 - 100% of pressure range
Repeatability
Process variables
Liquids
Gas and steam
DN25-150 (1" - 6")
DN200-300 (8" - 12")
± 0.75%
± 0.90% of rate
Mass flowrate
0.2%
0.25%
± 0.65% of rate
± 0.90% of rate
Volumetric flowrate
±1C or 1% of measured value
Temperature
200 ms (1 tau) or 3/f in seconds (with deactivated damping, the respective greater value shall apply). The response time depends on the respective vortex frequency f. Low flow rates can result in higher response times.
Response time
* Indication of accuracy in % of the measured value (% of measured value)
Measuring accuracy - Reference conditions Flow measurement Set flow range
0.5 to 1 x Q vmax DN 20 °C (68 °F) ±2 K
Ambient temperature
Relative humidity
65 %, ±5 %
86 to 106 kPa (12.5 to 15.4 psi)
Air Pressure
Power supply
24 Vdc
Signal cable length (for remote mount design)
30 m (98 ft)
Current output load
250 Ω (only 4 to 20 mA)
Water, approx. 20 °C (68 °F), 2 bar (29 psi) Air, 960 mbar abs. ±50 mbar (14 psi a ±0.7 psi), 24 °C ±4 °C (75 °F ±7 °F)
Measuring medium for calibration
Calibration loop internal diameter
corresponds to inside diameter of device
Unobstructed straight inlet section
15 x DN 3
Outlet section
5 x DN 3
Pressure measurement
3 x DN to 5 x DN behind the flowmeter
3 Check IM-P736-04 for full installation guidance.
TI-P736-01 EMM Issue 6
Page 6 of 13
VLM30/VLM30 Food+ In-line Vortex Flowmeter
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