Construction And Function; Construction; Function - Balluff BTL7-A/C/E/G5 Serie Manual Del Usuario

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BTL7-A/C/E/G5_ _-M_ _ _ _-B/Z-DEX_-K_ _/KA_ _
Micropulse Transducer - Rod Style
3

Construction and function

Ø 5 for hook spanner
Ø 65, max. tightening
torque 50 Nm
BTL7-...-DEXB-KA_ _
Axial connection
BTL7-...-DEXB-K_ _
Radial connection
1) Unusable area
2) Not included in scope of delivery
Fig. 3-1:
BTL7... transducer, construction
3.1

Construction

Electrical connection: The electrical connection is made
via a cable (see Type code breakdown on page 26).
Housing: Housing containing the processing electronics.
Fastening: We recommend assembling these transducers
on the mounting thread:
BTL7-...-B: M18×1.5
BTL7-...-Z: 3/4"-16UNF
The BTL7-...-DEXB-... transducers have 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 starting on
page 25).
Nominal length: Defines the available measuring range.
Rods with various nominal stroke lengths from 25 mm to
7620 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.
www.balluff.com
B: 30-1
Z: 2"-0.04
Nominal length
= Measuring range
O-ring Viton
1)
GFLT 90
2)
Magnet
Mounting surface
B: 30-1
Z: 2"-0.04
Nominal length
= Measuring range
O-ring Viton
1)
GFLT 90
Thread size:
B: M18x1.5
Z: 3/4"-16UNF
3.2
The BTL7 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 a 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. Depending
on the version, this information is made available as a
voltage or current with rising or falling gradient.
The electrical connection between the transducer, the
decoder unit/controller, and power supply is established
via a cable that is permanently connected to the
transducer axially or radially, depending on the version.
Ignition protection "d"
Flameproof enclosure
1)
Damping zone
Thread
M4x4/6 deep
Float
1)
Float plug
BTL7-...-DEXA-KA_ _
1)
Damping zone
Thread
M4x4/6 deep
1)
Float plug
BTL7-...-DEXA-K_ _

Function

english
Ground screw
9

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