Function And Characteristics; Characteristics; Function - Balluff BTL5-A/C/E/G1 Serie Manual Del Usaurio

BTL5-A/C/E/G1 _-M_ _ _ _-HB/WB-FA_ _/F_ _-C
Micropulse Linear Transducer - Rod Style
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Function and characteristics

2.1

Characteristics

Micropulse transducers are char-
acterized by:
– Very high resolution, repeatabil-
ity, and linearity
Absolute output signal
–
– Tough assembly
Housing of stainless steel
–
Wear- and maintenance-free
–
measuring principle
– Insensitive to shock, vibration,
contamination, and noise
Pressure rated to 600 bar
–
Teflon cable
–
– Capability of connecting cable
guard systems
– Enclosure rating per IEC 60529:
Cable version IP 68
(type tested at 5 bar / 48 h)
IP69/K with connected cable
guard system
2.2

Function

The transducer contains a wave-
guide enclosed by an outer stain-
less steel rod. A magnet attached
to the moving member of the ma-
chine or to the cylinder piston is
moved over the rod and its posi-
tion constantly updated. The mag-
net ring must remain within the
measuring range.
The magnet defines the measured
position on the waveguide. An
internally generated INIT pulse
interacts with the magnetic field of
the magnet to generate a magneto-
strictive 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
arriving at the beginning of the
waveguide creates an electrical
signal in the coil surrounding the
waveguide. The wave propagation
time is used to derive the position.
Depending on the version the corre-
sponding value is output as a volt-
age or a current either with rising or
falling characteristic. This takes
place with high precision and re-
peatability within the measuring
range indicated as the nominal
stroke length.
At the rod end is a damping zone,
within which no reliable signal is
available, but which may be en-
tered by the magnet.
The electrical connection between
the transducer, the controller and
the power supply is via a fixed
cable.
Dimensions for installing the
Micropulse transducer: ➥ ➥ ➥ ➥ ➥ Fig. 3-1
Dimensions for installing the mag-
net: ➥ ➥ ➥ ➥ ➥ Fig. 3-4
english
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