Sitrans Lps200 Introduction; Sitrans Lps200 Features; Sitrans Lps200 Applications; Principle Of Operation - Siemens SITRANS LPS200 Operating Instructions Manual

SITRANS LPS200 Introduction

Notes
• Installation, maintenance, and commissioning must be performed by qualified
technical personnel.
• SITRANS LPS200 must be used only in the manner outlined in this instruction
manual.
• This product is intended for use in industrial areas. Operation of this equipment in a
residential area may cause interference to several frequency based
communications.
The SITRANS LPS200 rotating paddle switch is used for level monitoring of bulk
materials. It can be used to detect full, demand, or empty conditions in silos, hoppers, or
storage vessels of materials such as grain, feed, cement, plastic granulate, and wood
chips. The paddle switch measures bulk densities as low as 100 g/l (6.2 lb/ft
standard measuring vane, 35 g/l (2.2 lb/ft
3
(0.9 lb/ft ) with the optional rectangular vane.

SITRANS LPS200 Features

• High integrity mechanical seal
• AC, DC, or switch-selectable power supply
• Unique friction clutch mechanism. When the measuring vane encounters sudden
resistance, the friction clutch slips to prevent internal component damage.
• Optional fail-safe function alarms on fault conditions or component failure
• Rotatable enclosure
• Optional vanes for use with high and low bulk densities to 15 g/l (0.9 lb/ft
• Compact, rigid extension (top mounted only), angled rigid extension, and cable
extension configurations available
• High temperature and high pressure models available
• Optional extension kit available for the compact version

SITRANS LPS200 Applications

• Grain, feed, cement, plastic granulate, wood chips, rice, soybeans, etc.
• Low or high bulk density materials

Principle of Operation

A low revolution gearing motor drives a rotating measuring vane. When material reaches
the rotating vane, rotation stops, actuating a switch. When the vane is no longer covered,
rotation resumes and the switch reverts to its normal condition.
The synchronous induction motor is freely suspended within the housing. When the
rotation is slowed by the material, the reaction torque is used to operate a switch that
gives an electrical signal to stop the motor. When the material level moves away from the
rotating vane, a spring draws the motor back into operating position, the switch returns to
operating position, and the motor is switched back on.
Two motor speeds are available:
Page EN-2 SITRANS LPS200 – OPERATING INSTRUCTIONS
3
) with the optional hinged vane, or 15 g/l
1 rpm, for storage silos
5 rpm, for faster process requirements
3
) with the
3
)
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