Function And Characteristics; Characteristics; Function; Available Stroke Lengths And Magnets - Balluff BTL5-A/C/E/G1 M/U K-SR 32/K Serie Notice D'utilisation

BTL5-A/C/E/G1_-M/U_ _ _ _-K-SR 32/K_ _
Micropulse Linear Transducer - Rod Style
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Function and Characteristics

2.1

Characteristics

Micropulse transducers feature:
– Very high resolution, repeatability
and linearity
– Wear- and maintenance-free
– Immunity to shock, vibration, con-
tamination and electrical noise
– An absolute output signal
– Pressure rated to 600 bar
– Protection class per IEC 529:
IP 67 for connector version,
IP 68 (5 bar/48 h) for cable version
2.2

Function

The Micropulse transducer contains
a tubular waveguide enclosed by an
outer stainless steel rod. A magnet
attached to the moving member of
the machine or to the cylinder pis-
ton is moved over the rod and its
position constantly updated.
The magnet defines the measured
position on the waveguide. An inter-
nally generated INIT pulse interacts
with the magnetic field of the mag-
net to generate a magnetostrictive
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Installation

3.1

Mounting

When possible, use non-magnetiz-
able material for attaching the trans-
ducer and magnet ring. ➥ ➥ ➥ ➥ ➥ Fig. 3-1.
When attaching the transducer to
magnetizable materials, appro-
priate measures must be taken to
protect against magnetic disturb-
ances ➥ ➥ ➥ ➥ ➥ Fig. 3-1. Note the
recommended distance of the
transducer and cylinder from
strong, external magnetic fields.
torsional wave in the waveguide
which propagates at ultrasonic
speed.
The torsional wave arriving at the
end of the waveguide is absorbed in
the damping zone. The wave arriv-
ing at the beginning of the wave-
guide creates an electrical signal in
the coil surrounding the waveguide.
The propagation time of the wave is
used to derive the position. Depend-
ing on the version the corresponding
value is output as a voltage or a cur-
rent either with rising or falling char-
acteristic. This process takes place
with measuring high precision and
repeatability within the stroke range
defined as nominal stroke length.
At the rod end is a damping zone,
within which no reliable signal is
available, but which may be entered
by the magnet.
The electrical connection between
the transducer, the processor/con-
troller and the power supply is via a
cable, which depending on the ver-
sion is either fixed or connected
using a female connector.
➀ - ➂ for magnetizable materials
➃ for non-magnetizable materials
Fig. 3-1: Mounting
Dimensions for installing the
Micropulse transducer: ➥ ➥ ➥ ➥ ➥ Fig. 3-2
Dimensions for installing the mag-
net: ➥ ➥ ➥ ➥ ➥ Fig. 3-4
2.3 Available stroke lengths
and magnets
To provide for optimum fit in any
application, a wide range of stan-
dard stroke lengths and magnets in
various form factors are available.
Magnets must therefore be ordered
separately.
The following nominal stroke
lengths are available:
Stroke lengths Increments
[mm] [mm]
50 ... 500 25
500 ... 1000 50
1000 ... 2000 100
2000 ... 4000 250
Other stroke lengths on request.
non-magnetizable material
a = Spacer made of non-mag-
netizable materials
b = Magnet
english
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