User's Manual

43
VIBCONNECT RF 11.2011
5.5 Installation of sensors
For proper installation of the sensors on site, the operator must
ensure that the following requirements are met:
location of installation
• The sensors are secured to the machine with the supplied M8
threaded bolt or with a suitable mounting adapter.
• Observe the rules for the choice of measuring points for vibra-
tion measurements.
Permissible ambient conditions
Temperature: – 40 °C to +125 °C
Relative air humidity: max. 95 %, non-condensing
The sensors must not be installed in a location that is near a strong
electromagnetic field (e.g. generator, high-voltage cable, electric
drive unit, etc.).
tools and materials
• Mounting adapter: Screw adapter (VIB 3.480*), adhesive adapter
(VIB 3.418), magnetic adapter (VIB 3.423). For special tools and
auxiliary materials required for the attachment of the various
adapters, see chapter for adapter installation.
• Standard tools for electrical installation (wire cutter, cable
stripper, screwdriver).
• Suitable strain relief devices for cables.
5.5.1 Choosing the measuring points
When choosing a location of installation for a sensor observe the
following rules to ensure optimum signal transmission:
• Mount sensor in radial measuring direction (i.e. perpendicular to
shaft, in vertical or horizontal position).
• Axial measuring points are recommended to monitor the
machine for the following defects or faults: Misalignment,
damaged geared wheels, loose fixtures, bent shafts, etc.
• Machines mounted on rigid foundations show high horizontal
vibration. Fixed anchoring suppresses vertical vibration.
•Machines mounted on vibration-damped foundations show
vibration that is equally strong in horizontal and vertical direc-
tion.
• The frequency behaviour and dynamic range of the sensor can
be significantly influenced by the way the sensor is attached.
Weak coupling to the measuring point results in attenuated sig-
nals and limits the frequency range. The sensor must be secured
to the measuring point in a rigid, friction-locked way and free
Installation and commissioning
* included in
scope of delivery