Measuring range: 2 up to 224 m/s / 600 m/s (compressed air) 0,04 up to 500 mbar differential pressure for gases
Measured medium: Air and gases
Accuracy: (m.v.: of meas. value) ± 1.5% of m.v.
Measuring principle: Differential pressure
Measuring span: 1:100 / 300
Response time: t 99: < 1 sec.
Temperature of the medium: -30 °…+80 °C
Operating pressure: -1...30 bar (g)
Ambient temperature: -20 °…+70 °C
Power supply: 18…36 VDC, 5 W
Signal outputs: As standard: RS 485 (Modbus-RTU), 4…20 mA, pulse Optional: Ethernet Interface (PoE), M-Bus

Example order code VD 520: 0690 0520_A1_C1_D1_E1_F2_G1_H1_K1_L1
Measuring section
A1 DN 15
A2 DN 20
A3 DN 25
A23 DN 25 reduced DN 15 (only with Flange)
A4 DN 32
A24 DN 32 reduced DN 20 (only with Flange)
A5 DN 40
A25 DN 40 reduced DN 25 (only with Flange)
A6 DN 50
A26 DN 50 reduced DN 32 (only with Flange)
A7 DN 65 (only with Flange)
A27 DN 65 reduced DN 40 (only with Flange)
A8 DN 80 (only with Flange)
A28 DN 80 reduced DN 50 (only with Flange)
A29 DN 100 reduced DN 65 (only with Flange)

Measuring range
B1 224 m/s (compressed air)
B2 600 m/s (compressed air)
B3 0,04 - 500 mbar differential pressure (gases)

Process connection
C1 R male thread
C2 NPT male thread
C3 Flange DIN EN 1092-1
C4 Flange ANSI 16.5 Class 150 lbs
C5 Flange ANSI 16.5 Class 300 lbs

Display
D1 with integrated display

Signal outputs / bus connection option
E1 1x 4…20 mA analogue output (electrically not isolated),
pulse output, RS 485 (Modbus-RTU)
E2
Ethernet interface (Modbus/TCP), 1 x 4…20 mA
analogue output (not electrically isolated), RS 485
(Modbus-RTU)
E3
Ethernet interface PoE (Power over Ethernet)
(Modbus/TCP), 1 x 4…20 mA analogue output
(not electrically isolated), RS 485 (Modbus-RTU)
E4 M-Bus, 1 x 4…20 mA analogue output
(not electrically isolated), RS 485 (Modbus-RTU)

Calibration
F1 No real gas adjustment - gas type configuration per gas
constant
F2 Real gas adjustment in the gas type selected below

Gas type
G1 Compressed air
G2 Nitrogen (N2)
G3 Argon (Ar)
G4 Carbon dioxide (CO2)
G5 Oxygen (O2)
G6 Nitrous oxide (N2O)
G7 Natural gas (NG)
G8 Helium (He)
G9 Propane (C3H8)
G10 Methane (CH4)
G11 Biogas (Methane 50%: CO2 50%)
G12 Hydrogen (H2)
G90 Further gas / please indicate gas type (on request)
G91 Gas mixture / please indicate mixture ratio (on request)

Reference standard
H1 20 °C, 1000 mbar
H2 0 °C, 1013,25 mbar
H3 15 °C, 981 mbar
H4 15 °C, 1013,25 mbar
Maximum pressure
K1 30 bar (g)
K3 2 bar (g)
K4 10 bar (g)

Surface conditon
L1 standard version
L2 Special cleaning - oil and grease free (e. g. for oxygen
applications and so on)
L3 Silicone-free v