IM-P736-02 EMM Issue 3
14
VLM30 In-Line Vortex Flowmeter
Caution: When selecting a vortex flow meter for steam flow measuring, care must be taken around
the low flow velocity as this can cause instability in the flow measurement readings. Please ensure
the appropriate flow meter size is selected via the sizing tool for the application.
Sensor
Model Number VLM30-S VLM30-E
Design Integral or remote transmitter mount design
IP Degree of protection in accordance IP66, IP67 and NEMA 4X
Measuring accuracy for liquids* ≤ ±0.65% under reference conditions.
Measuring accuracy for gasses ≤ ±0.9% under reference conditions.
Repeatability DN25 (1") to DN150 (6"): ≤ ±0.2%, from DN200 (8"): ≤ ±0.25%
Permissable viscosity for liquids DN25 (1"): ≤ 5 mPa s, from DN40 (1½"): ≤ 7.5 mPa s
Measuring span (typical) 1:20
Process connections
Flange: DN15 to DN300 (½" to 12")
Wafer type: DN25 to 150 (1" to 6")
Inlet/outlet Sections (typical)
Temperature measurement
Class A Pt100 temperature sensor installed in piezo sensor housing
(default standard).
Permissable measuring medium temperature
Standard: −55 to 280 °C (−67 to 536 °F),
Optional: −55 to 350 °C (−67 to 662 °F)
1
* Indication of accuracy in% of the measured value (% of meas.val.).
Measuring accuracy - Reference conditions
Flow measurement
Set flow range 0.5 to 1 x Q
vmax
DN
Ambient temperature 20 °C (68 °F) ±2 K
Relative humidity 65%, ±5%
Air Pressure 86 to 106 kPa
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)
Measuring medium for calibration
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)
Calibration loop internal diameter corresponds to inside diameter of device
Unobstructed straight inlet section 15 × DN
Outlet section 5 × DN
Pressure measurement 3 × DN to 5 × DN behind the owmeter
1
High Temperature Version 'B2' expected Q4 2023.
To Next Page
Loading...
Need help?
General
