Technical Information
|
| Measuring range VA 550 |
up to 50 Nm/s, low-speed version*
up to 92.7 Nm/s, standard version*
up to 185 Nm/s, max. version*
up to 224 Nm/s, high-speed version*
* Measuring range Nm³/h for diff erent pipe diameters and gases, see table measuring ranges flow
* All measured values related to DIN 1343 standard conditions 0° and 1013 mbar ex works |
Accuracy:
Accuracy class
(o. M. V. = of measured
value)
(o. F. S. = of full scale) |
± 1.5 % of m.v. ± 0.3 % of f.s.
on request:
± 1.0 % of m.v. ± 0.3 % of f.s. |
| Accuracy indications |
relative to ambient temperature 22 °C ± 2 °C, system pressure 6 bar |
| Repeatability |
0.25 % of m.v. in case of correct mounting (mounting aid, position, inlet section) |
| Measuring principle |
Thermal mass flow sensor |
| Response time |
t 90 < 3 s |
Operating temperature
range sensor tube/display unit |
40…180 °C standard version, sensor tube
-20…70 °C display unit
-20…120 °C for ATEX version |
Adjustment possibilities via display, external
hand-held device PI 500, PC Service Software,
remote diagnosis |
Nm³/h, Nm³/min, Nl/min, l/s, ft/min, cfm, kg/h, kg/min, inner diameter, reference conditions ° C/° F, mbar/hPa,
zero point correction, leak fl ow volume suppression, scaling analogue output 4...20 mA, pulse/alarm, error codes etc |
| Outputs |
Standard: 1 x 4…20 mA analogue output (electrically not isolated), pulse output, RS 485 (Modbus-RTU)
Optional: 2 x 4...20 mA active, Modbus TCP, HART, Profi bus DP, Profi net, M-Bus |
| Burden |
< 500 ohm |
| Additional average value calculation |
for all parameters freely adjustable from 1 minute up to 1 day, e. g. 1/2 hours average value, average day value |
| Protection class |
IP 67 |
| Material |
Die-cast aluminum housing, sensor tube stainless steel 1.4571 |
| Screw-in thread |
G 1/2" ISO 228, NPT 1/2", R 1/2", PT 1/2" |
Operating pressure
VA 550 |
50 bar, in special version 100 bar (with DVGW approval max. 16 bar) |
| Power supply |
18…36 VDC, 5 W |
| Approval |
ATEX II 2G Ex db IIC T4 Gb, ATEX II 2D Ex tb IIC T90 °C, Db, DVGW |
