4
Installation
The frequency behavior and dynamic range of the
sensor can be heavily influenced by installation.
Poor coupling with the measurement location
dampens the signal and restricts the frequency
range. As a general rule, the sensor requires
firm, friction-locked, contact and resonance-free
attachment to the measurement location. This
particularly applies to measurements at high fre-
quencies.
Basically, the following applies:
10 x Weight
Sensor
< Weight
object to be measured
The stabilized coupling can be achieved by
screw-
ing
the sensor onto the measurement location. If
screw mounting is not possible or inadmissible,
the sensor can be attached with an
adhesive
adapter. A
magnetic
coupling saves time and ex-
penditure on installation. It does however restrict
the upper frequency range.
Screw mounting
Applies to sensors of series VIB 6.12x (M8 / 90°).
Required tools and resources
– Hand-held drill
– Drill bits (3.5 mm /6.8 mm) with depth gage ring
– 90° countersink bit (VIB 8.694)
– M8 thread tap
– Torque wrench with 19 mm / 3/4“ hex socket
– Compressed air for cleaning out the hole
– Solvent for degreasing
– Threadlocker (LOCTITE 243)
Select the point of installation
• The drilled hole must have direct connection to
the bearing carrier if the sensor should measure
shock pulse signals.
• Minimum distance between the drilled hole
and protruding edges of the housing must be
35 mm (
A
). Allow adequate clearance to attach
the wrench.
Note
Ensure that a hole can be drilled at the chosen
location.
Drill threaded hole M8 / 90 °
• Drill pilot hole: 3.5 mm / 15 mm deep (
B
).
• Bore out hole: 6.8 mm / 15 mm deep (
C
).
• Contersink hole: 90° / 3 mm deep (
D
).
• Blow out the hole.
• Grease thread tap.
• Tap thread: M8 / 12 mm deep (
E
).
• Blow out the hole.
Mount sensor
• Clean the contact surfaces of the sensor and the
machine with solvent.
• Allow contact surfaces to dry.
• Thinly apply LOCTITE 243 to improve signal
transmission.
• Screw in the sensor and tighten with a torque
wrench (11 Nm,
F
).
• Check the sensor for tight mechanical fit.
Notes
Excessive torque can damage the thread or the
machine housing. Too little torque can allow the
sensor to work loose. Incorrect torque always
causes measurement errors!
The sensor must be protected against static
charging if it is installed on a non-grounded ma-
chine (e.g. belt-driven fan).
> 35
Dimensions in mm
3.5
>15
>12
M8
6.8
90°
>3
11 Nm
A
B
C
D
E
F
