Construction And Function; Construction; Function - Balluff BTL7-A510-M Serie Betriebsanleitung

BTL7-A/G510-M _ _ _ _ -H/W(8)-SA378-S32/S115/_ _ _
Micropulse Transducer - Rod Style
3

Construction and function

Mounting surface
H: 40-1 mm
W: 2"-0.04"
BTL7...-S32
Axial
1)
3)
25
0.5 Ø 25
12 43
BTL7...-S115
Axial
20
BTL7... cable
Axial
max. 7
20
Fig. 3-1: BTL7...H/W(8)... transducer, construction and function
3.1

Construction

Electrical connection: The electrical connection is made
via a cable or a connector (see Type code breakdown on
page 25).
BTL housing: Housing containing the processing
electronics.
Mounting thread: We recommend assembling these
transducers on the mounting thread:
– BTL7-...-H: M18×1.5
– BTL7-...-W: 3/4"-16UNF
The transducer with Ø 10.2 mm 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 22).
Nominal length: Defines the available measuring range.
Rods with various nominal lengths from 25 mm to
7620 mm are available depending on the version:
– Ø 10.2 mm: Nominal length from 25 mm to 7620 mm
– Ø 8 mm: Nominal length from 25 mm to 1016 mm
Damping zone: Area at the end of the rod that cannot be
used for measurements, but which may be passed over.
www.balluff.com
Nominal length =
Measuring range
2)
Magnet
Thread size:
Version
H: M18×1.5
...-H/W-...
W: 3/4"-16UNF
...-H8/W8-...
BTL7... cable
Radial
1) Unusable area
2) Not included in scope of delivery
3) Ø 5 for hook spanner Ø 65, max. tightening torque 100 Nm
1)
Damping zone
60
G
D1 G
10.2 mm Thread
M4x4/6 deep
8 mm No thread
35
0.5 Ø 25
23
3.2

Function

The Micropulse 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.
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 component of the torsional wave
which arrives at the beginning of the waveguide is
converted by a coil into an electrical signal. The travel time
of the wave is used to calculate the position. The position
is output as a voltage value with a rising gradient at both
outputs. Both outputs can be set separately.
Ø 65
english 7