Balluff BTL7-T500-M-B/Z-DEXA/B-K Serie Manual De Instrucciones página 41

BTL7-T500-M_ _ _ _-B/Z-DEX_-K_ _/KA_ _/ZA1K
Magnetostrictive Linear Position Sensor – Rod Style
4
Installation and connection (continued)
Installing the BTL
NOTICE
Interference in function
Improper installation can compromise the function of the
BTL and result in increased wear.
► Only vertical mounting from above is permitted!
► The mounting surface of the BTL must make full
contact with the supporting surface. A suitable
O-ring must completely seal the bore, i.e. the
countersink for the O-ring must be produced
according to Fig. 4-4.
► Check the suitability of the O-ring (Viton GFLT90) for
the specific application.
► Mounting must be done in a manner where the rod
cannot touch the container wall. Deflection of the
rod to the side, e.g. through flow currents, must
be prevented by a suitable bracket or appropriate
positioning in the tank.
► If the device rod is to be used in zone 0, a potential
difference between system parts resulting from
electrostatic charging must be prevented. The float
is thus designed in a manner where it tilts if installed
properly and always maintains contact with the rod.
This feature may not be impaired by the manner of
installation.
► The relevant Ex regulations must be observed to
ensure safe separation between zone 0 and zone 1.
► When tightening the BTL, a torque of 50 Nm may
not be exceeded.
► Mechanical loads may not be placed on the weld
seam at the end of the rod!
1. Make a mounting hole with thread (and countersink for
O-ring, if necessary) in accordance with Fig. 4-4.
2. Screw the BTL with mounting thread into the mounting
hole (max. torque 50 Nm).
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Zone 1
Separating area
Zone 0
Spacer tube,
1.4301
Cotter pin,
DIN 94 – 3.2 × 20 – 1.4301
Fig. 4-5: BTL installation,
application 2: fill level measurement
Zone carryover:
If the device rod is to be used in zone 0, a potential
difference between system parts resulting from
electrostatic charging must be prevented. The float is thus
designed in a manner where it tilts if installed properly and
always maintains contact with the rod. This feature may
not be impaired by the manner of installation. The relevant
Ex regulations must be observed to ensure safe separation
between zone 0 and zone 1.
Immersion depth S
s
of the float (see
Accessories)
english 13