Application
Special characteristics
Parts and characteristics
Useful additions
Construction features
Materials and surfaces
Standards and guidelines
Functional description
The face velocity is measured using a heated thermal resistor and based on the resistance change principle; it is a non-contact measurement and hence not subject to wear. The face velocity sensor is placed in a bypass opening where it measures the airflow. This airflow is equal to the face velocity of all sashes of the fume cupboard. The face velocity transducer can hence be used for both vertical and horizontal sashes.
VS-TRD for fume cupboard control
Since cascade control applies, the face velocity is kept constant based on the volume flow rate, which lies between the set minimum and maximum volume flow rates.
Opening the sash leads to a decrease of the face velocity. The fume cupboard controller raises the volume flow. Sufficient air transfer from the room to the fume cupboard is ensured (and work safety is maintained).
Closing the fume cupboard leads to a decrease of the volume flow such that the face velocity is kept constant. The minimum volume flow ensures sufficient ventilation of the fume cupboard.
VS-TRD for monitoring
The face velocity is monitored. If the face velocity is above or below a certain limit, an alarm is emitted on the control panel. Limits and the type of alarm can be configured.
Installation and commissioning
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We are here for you
Please specify your message and type of request.
Tel.: +91 (0) 22 6775-1600 | Fax: +91 (0) 226775-1613
Contact
Thank you for your message!
Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +91 (0) 22 6775-1600 | Fax: +91 (0) 226775-1613