The Velocity Transmitters were developed to obtain accurate measuring results over a wide range of velocities and temperatures. A high-quality hot film sensor element based on cutting-edge thin film technology ensures maximum sensitivity. even at lowest mass flows. At the 8881e time, the innovative probe design produces reliable measuring results at high flow velocities of up to 40m/s (8000ft/min)
The integrated temperature compensation minimizes the temperature cross-sensitivity of the EE75 series which, combined with the robust mechanical design. allows it to be used at process temperatures between -40 to 4120°C (40 to 248°F). In addition to air velocity and temperature values, the transmitter calculates the volumetric flow rate in m3/h or ft3/min. The cross section of the duct needs to be determined for this purpose and the volumetric flow rate can be displayed and directed to one of the analogue outputs.
The configuration software included in the scope of supply allays to choose the appropriate output parameter and freely scale the display range arid signs level of the two analogue outputs. In addition user-friendly calibration of the air velocity and temperature and the adjustment of key parameters (e.g. response time of the velocity and temperature lay flow cut-off points, etc. are supported as well.
An optional illuminated display with two control buttons integrated in the cover is available. In addition. this enables changes of the configuration to be made directly on the unit.
|Function||Range||Resolution at 25 C||Accuracy||Load|
|DC mV (source/sink)||199.99||0.1 mV||± 1 % of F.S.D.||5 mA max|
|DC mA (source/sink)||25 mA||10 m V||± 0.1% of F.S.D||500O at 20 mA|
|RTD (source / sink)||-100 to +400 ° C OR 247.0 W||100 m W|
± 0.15% of F.S.D
(For 0 to 400 ° C)