Installing The Transducer; Application 2: Fill Level Measurement In Zone; Preparing For Installation - Balluff BTL7-A/C/E/G5 Serie Manual Del Usuario

BTL7-A/C/E/G5_ _-M_ _ _ _-B/Z-DEX_-K_ _/KA_ _
Micropulse Transducer - Rod Style
4
Installation and connection (continued)
4.2.3

Installing the transducer

NOTICE
Interference in function
Improper installation can compromise the function of the
transducer and result in increased wear.
► The mounting surface of the transducer must make
full contact with the supporting surface.
► The bore must be perfectly sealed (O-ring/flat seal).
► Check the suitability of the O-ring (Viton GFLT90) for
the specific application.
► When tightening the transducer, a torque of 50 Nm
may not be exceeded.
► If installed in a hydraulic cylinder outside of zone 0,
the magnet should not make contact with the rod.
Protect the rod from damage and wear.
► Make a mounting hole with thread (possibly with
countersink for the O-ring) acc. to Fig. 4-4.
► Screw the transducer with mounting thread into the
mounting hole (max. torque 50 Nm).
► Install the magnet (accessories).
► From 500 mm nominal length: support the rod and
tighten it at the end if necessary.
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Ignition protection "d"
Flameproof enclosure
4.3 Application 2: fill level measurement in zone 0
(with float, according to Section 11.1)
4.3.1

Preparing for installation

Installation variant: For holding the transducer and float
we recommend non-magnetizable material.
Avoid magnetic field interference at the screw-in thread,
e.g. by the weld seam at the threaded flange!
Install the transducer in such a manner that only the rod
extends into the explosive area of zone 0 and the body
and electronics remain behind a separating wall in the
explosive area of zone 1.
The spacer tube ensures that the float does not move into
the damping zone in the bottom end of the rod.
The depth of the mounting hole must be at least 25 mm.
At least 5 thread pitches must be engaged and there must
be a thread coverage of at least 8 mm.
Several floats: A second float may be used in order to
measure the position of the separating layer between two
liquids (e.g. oil and condensation). Suitable float:
BTL2-S-4414-4Z01-Ex.
4.3.2 Installing the transducer
Installing the float
Important notes
– Only the floats listed under Accessories may
be used as magnets in zone 0 (see
Section 11.1).
– Design measures ensure that the floats are
electrically connected with the rod in any
position. The specified installation position
must be observed!
– Only use the cotter pin once!
1. Install the float (accessory) taking the orientation into
account (raised markings on top, see Section 11.1).
2. Secure the float using the cotter pin (included in the
scope of delivery of the float), without placing any
mechanical loads on the rod. Insert the cotter pin
through the hole and hold it at the eye with a pair of
pliers. With a second pair of pliers, bend the straight
ends of the cotter pin around the tube one after
another.
english 11