Technical data
VA 520 Bi directional English V1.21
Page 7 of 45
4
Technical data
Measurement:
Flow and consumption
Reference Standard:
Standard settings ex works:
DIN 1945, ISO 1217 at 20°C and 1000 mbar
Selectable Units
m³/h
(Standard settings ex works)
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:
-30 ... 80°C probe tube
-20 ... 70°C housing
Operating pressure:
up to 16 bar, special version PN 40 (40 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 chapter 4), max. burden < 500 Ohm
Pulse output:
pulse outputs 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:
TFT 1.8 Resolution 220 x 176
Mounting thread:
R 1/4", R1/2", R3/4", R1", R 1 1/4" R1 1/2", R 2” DIN EN
10226 (ISO 7-1)
Material:
Stainless steel 1.4301 / 1.4404
Version with flange DIN EN 1092-1: Stainless steel 1.4404
Protection calss:
IP65
* m.v. = measured values
f.s. = full scale
