Construction And Function; Construction; Function; Number Of Magnets - Balluff BTL5-T1 -M Série Manuel D'instructions

BTL5-T1 _ _ -M _ _ _ _ -A/B/Y/Z-S103
Transducer – Rod Style
3

Construction and function

Mounting surface
Electrical connection
BTL5-...-B/Z-...
0.5
~20 104
1) Unusable area
2) Not included in scope of delivery
Fig. 3-1: BTL5... transducer, construction and function
3.1

Construction

Electrical connection: The electrical connection is made
via a connector (see Type code breakdown on page 19).
Housing: Aluminum housing containing the processing
electronics.
Mounting thread: We recommend assembling the
transducer on the mounting thread:
– BTL5-...-A/B: M18×1.5
– BTL5-...-Y/Z: 3/4"-16UNF
The transducer has an additional thread at the end of the
rod to support larger nominal lengths.
Magnet: Defines the position to be measured on the
waveguide. Magnets are available in various models and
must be ordered separately (see Accessories on
page 16).
Nominal length: Defines the available measuring range.
Rods with various nominal stroke lengths from 25 mm to
4000 mm are available depending on the version.
Damping zone: Area at the end of the rod that cannot be
used for measurements, but which may be passed over.
3.2

Function

The transducer contains the waveguide which is protected
by an outer stainless steel tube (rod). A magnet is moved
along the waveguide. This magnet is connected to the
system part whose position is to be determined. The
magnet defines the position to be measured on the
waveguide.
www.balluff.com
B: 30 –1 mm
Z: 2" - 0.04"
Nominal length =
Measuring range
1)
2)
Magnet
Mounting
Thread size:
B: M18×1.5
Z: 3/4"-16UNF
25
BTL5-...-A/Y-...
Damping zone
60
surface
A: 30 –1 mm
Y: 2" - 0.04"
Thread size:
25
A: M18×1.5
Y: 3/4"-16UNF
The magnet defines the position to be measured on the
waveguide. An internally generated INIT pulse interacts
with the magnetic field of the magnet to generate a
torsional wave in the waveguide which propagates at
ultrasonic speed.
The component of the torsional wave which arrives at the
end of the waveguide is absorbed in the damping zone to
prevent reflection. The wave which arrives at the end of the
measuring range is converted by a coil into an electrical
signal. The travel time of the wave is used to calculate the
position at a resolution of 5 µm. This is done with a high
level of precision and reproducibility in the selected
resolution within the measuring range indicated as the
nominal length.
The electrical connection between the transducer, the
decoder unit/controller, and power supply is established
via several cables that are connected via connectors.
3.3

Number of magnets

Up to 4 magnets can be used. The distance (L) between
the magnets must be at least 65 mm.
Fig. 3-2: Distance between the magnets
1)
Thread M4x4/6 deep
english 7