Mounting; Amm Limit Switch; Introduction; Operation - Tecfluid Series LT Instruction Manual

10.5

Mounting

Once the electrical connection is made and the cable gland is tightened, connect the female
connector (A) to the male base (C) in the correct position, placing the gasket (B) between
them.
11

AMM LIMIT SWITCH

11.1

Introduction

The AMM limit switch can be used to generate an alarm or an operation when the level that
the instrument is measuring reaches a preset value. It is a bi–stable SPDT limit switch.
It consists of a micro-switch that is actuated by the magnetic field of the float, by means of a
cam that pushes the micro-switch lever.
11.2

Operation

When the float passes through the point where the limit switch is positioned, it changes the
state of the micro-switch, and therefore the output state. This is maintained until the float
passes in the opposite direction by the point where the switch is, returning again to the
previous state.
11.3

Switching point adjustment

11.3.1 LT models

To fix the limit switch on the level gauge, completely loosen the clamp (D) and open it. With
the clamp open, place the limit switch in the body of the level indicator and close the clamp
on the tube.
Place the level switch at the desired level and tighten the clamp.
21