Magnet Ring, Installation; Installation Requirements Of Level Sensing In Zone 0 - Balluff BTL5-A-M-J-DEXA Serie Manual De Instrucciones

BTL5-A/C/E/G1_-M_ _ _ _-J-DEXA/B-K_ _
Micropulse Linear Transducer - Rod Style
3 Installation (cont.)
Note the following when
installing:
The installation surface of the
BTL housing must lie fully against
the mating surface. The appro-
priate O-ring must seal the bore
hole perfectly, i.e. the chamfer
for the O-ring must be finished
according to ➥ Fig. 3-4.
Suitability of the installed O-ring
(Viton GFLT90) must be verified
for the specific application.
To achieve a secure mounting,
attach the transducer with all
6 cylinder head screws
ISO 4762 – M6 × 22 – A2-70,
➥ Fig. 3-1. All screws must be
tightened to 6 Nm.
When installing transducers with
nominal lengths of greater than
500 mm in a horizontal orienta-
tion, it is advisable to support or
attach the rod at its end. The
bore diameter in the piston must
be at least 13 mm.
When installing in a hydraulic
cylinder outside of Zone 0 the
magnet ring must not rub against
the transducer rod. Protect the
end of the rod from wear.

3.2.1 Magnet ring, installation

Each transducer requires a mag-
net, which must be ordered sepa-
rately. ➥ ➥ ➥ ➥ ➥ Fig. 3-5. The magnet
travels in linear fashion along the
axis of motion. ➥ ➥ ➥ ➥ ➥ Fig. 3-1.
We recommend that magnet rings
be installed in or against non-mag-
netizable material. ➥ ➥ ➥ ➥ ➥ Fig. 3-3.
The smallest permissible distance
between the magnet ring and the
mounting surface of the BTL hous-
ing is shown in ➥ ➥ ➥ ➥ ➥ Fig. 3-1.
6
english
BTL-P-1013-4R
BTL-P-1013-4S
BTL-P-1012-4R
Fig. 3-5: Magnet rings (optional)
The BTL-P-1013-4R and
BTL-P-1012-4R are supplied with
an appropriate spacer made of non-
magnetizable material.
3.3 Installation requirements
of level sensing in Zone 0
(with float according to
Section 3.3.2)
We recommend that both the
transducer and the magnet ring/
float be installed in non-magnetiz-
able material. ➥ ➥ ➥ ➥ ➥ Fig. 3-3.
A current magnetic field at the
mounting area, e.g. caused by the
welding joint should be prevented!
The transducer must be installed
such that only the rod portion ex-
tends into the hazardous area of
Zone 0, with the electronics head
remaining behind a divider wall in
the hazardous area of Zone 1.
Ignition Class "d"
Flameproof enclosure
The stop prevents the float from
entering the damping zone on the
lower end of the rod.
Note the following when in-
stalling:
Only vertical mounting is permit-
ted! It must be done such that it
is not possible for the protective
tube to strike the container wall.
Any excursion of the protective
tube to the side, e.g. through
flow-currents, must be
prevented by suitable brackets.
If the rod section of the BTL is
located in Zone 0, you must
prevent static discharge from
causing a difference in potential
between parts of the system.
The float is therefore so con-
structed that when installed cor-
rectly it will tip and always make
contact with the rod. The instal-
lation must not defeat this
design feature.
To ensure safe isolation between
Zone 0 and Zone 1 the relevant
safety regulations for potentially
explosive atmospheres must be
observed!
To achieve a secure mounting,
attach the transducer with all
6 cylinder head screws
ISO 4762 – M6 × 22 – A2-70,
å Fig. 3-1. All screws must be
tightened to 6 Nm.
Important for zone separation:
The dimension Ø18 +0.15
for the bore must be ex-
act. The depth of the
fitting bore must be at least
25 mm.
Installation note:
The weld seam at the end of the
transducer rod must not be sub-
jected to mechanical stress!
Insert the cotter pin through the
hole and use pliers to hold
against the lug. Use a second
pair of pliers to bend the straight
ends of the cotter pin around the
rod.
Cotter pin should be used only
once!