Technical data
VA 500 Bi-directional English 1.24 Seite 9 von 56
6 Technical data
Measurement: Flow, Consumption and Velocity
Reference: Standard settings ex works:
DIN 1945, ISO 1217 at 20°C and 1000 mbar
other standards can be adjusted by Display keys (optional)
or means of the CS Service Software.
Selectable Units: m³/h (Standard settings ex- factory)
m³/min, l/min, l/s, ft/min, cfm, m/s, kg/h, kg/min, kg/s, °C, °F
Measuring principle: calorimetric measurement
Sensor: Pt45, Pt1000
Measuring medium: Air, gases
Operating temperature: -20 ... 70°C housing
-30 ... 100°C probe tube
Relative humidity for
measuring medium: < 95 % r.H (no condensation on the sensor element allowed)
Operating pressure: up to 50 bar
Power supply: 18 to 36 VDC
Power consumption: max. 5W
Digital output: RS 485 (Modbus RTU)
Optional Ethernet (also PoE) and MBus
Analog output: 4...20 mA (see tables page 13 -20),
max. burden < 500 Ohm
Pulse output: pulse output potential free (dry contact)
passive: max. 48Vdc, 150mA
1 pulse pro m³ resp. pro l,
Valency adjustable with the display keys
Accuracy: ± 1,5 % m.v.*, ± 0,3 % f.s.*
Display: optional TFT 1.8“ Resolution 220 x 176
Mounting thread: G ½“, optional ½” NPT
Material: Stainless steel 1.4301 / 1.4404
Protection class IP65
‘* m.v. = measured values
f.s. = full scale
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