Principle Of Operation - Siemens sitrans LVS200 Bedienungsanleitung

Principle of Operation

A signal from the electronic circuit excites a crystal in the probe, causing the fork to
vibrate. If the fork is covered by material, the change in vibration is detected by electronic
circuitry which causes the relay to change state after a one second delay. When the
material no longer reaches the tines, full vibration resumes and the relay reverts to its
normal state.
WARNINGS:
• This product is designed as a Pressure Accessory per Directive 97 / 23 / EC
and is not intended for use as a safety device.
• Materials of construction are chosen based on their chemical
compatibility (or inertness) for general purposes. For exposure to
specific environments, check with chemical compatibility charts
before installing.
7ML19985FT61 SITRANS LVS200 – INSTRUCTION MANUAL Page EN-3