0970 0042 VA 452 English, V1.9, 13.08.13 0970 0042 VA 452 English, V1.9, 13.08.13
Flow sensor VA 452 Flow sensor VA 452
718
Installation
1. Orientation
Pipe
requirements
At all times good installation practice should be followed:
•
Clean pipes and flange welded joints
•
Correctly sized gaskets
•
Correctly aligned flanges and gaskets
•
Use seamless pipes immediately upstream of the flowme-
ter.
•
Use of pipes that match in regards of the internal diameter
next to the flowmeter. Avoid any disturbance or miss-
alignment greater than 1 mm.
•
Anything that disturbs the smoothness of the internal pipe
wall (see figure below) should be eliminated; the goal
should be a smooth uninterrupted internal surface. For
further information please refer to ISO 14511.
3. Installation
Accuracy
Uncertainty: 1.5% of reading + 0.3% of full scale
Repeatability: 0.25 % of reading
Stated uncertainty at:
Ambient / process temperature: 23 °C ± 3 °C
Ambient / process humidity: <90%, no condensation
Process pressure: 0.6 MPa
Response /
Sampling
Response time: T
95
< 5 seconds
Sampling rate: 5 samples per second
Display is refreshed every 0.5 seconds
Outputs are refreshed every 0.2 seconds
Process
connection
R thread (ISO 7-1), Flange EN 1092-1
All parts in contact with the medium are of stainless steel 316L
Power supply
16 - 30 VDC, 7 W
Environment
conditions
Ambient temp.: -30 … +65 °C (non display version)
-25 … +65 °C (display version)
Storage temp.: -40 … +65 °C
Protection: IP 67
Shock resistance: IEC 60068-2-31
Vibration resist.: IEC 60068-2-6
EMC: IEC / EN 61326
Operating
conditions
Medium temp.: -40 … +100 °C
Pressure loss: < 3 hPa (4” pipe)
Medium pressure: -0.1 … 4.0 MPa
Analogue
output
Active / passive selectable, galvanic isolated
Active: 4 to 20 mA, RL < 400 Ω
Passive: 4 to 20 mA; supply voltage 1 ! 30 V DC, RL <
500 Ω
for HART: RL ≥250 Ω
Uncertainty: < 0.3% of reading
Resolution: 0.005 mA
Pulse/Alarm
output
NO switch, no polarity required, galv. isolated
Max rating: 30 VDC, 200 mA
Pulse width: 10 … 100 msec (depending on flow rate)
Communication Distance: < 3m (depend on environment)
Device name: VA 452 + s/n (Can be edited)
Bluetooth
DN 15 (1/2”), DN 20 (3/4”), DN 25 (1”), DN 32 (1 ¼”),
DN 40 (1 ½”), DN 50 (2”), DN 65 (2 ½”), DN 80 (3”)
Tube size
