Page 116 - Lehrbuch Neigungsmessung deutsch 2018.indd

COMPENDIUM INCLINATION MEASUREMENT
WYLER AG, WINTERTHUR / SWITZERLAND

The following list of characteristics should allow a proper differentiation and proper application of the 2
sensors:
LEVELMATIC 31
• High resolution, high precision for inclinations up to ±20 mRad (roughly 1.15°)
• Excellent signal-to-noise ratio
• Excellent repeatability
• Excellent linearity
• Good temperature stability
• Maximum inclination corresponds to an output of ±2000 mV

LEVELMATIC C
• Excellent precision for inclinations up to ±30°
• Supply voltage can be chosen between ±12 V and ±18 V DC
• Excellent repeatability
• Excellent long-term stability in inclined position
• Excellent linearity
• Excellent temperature stability
• Maximum inclination corresponds to an output voltage of ±1 V, ±2.5 V, or ±5 V and an output cur-
rent of 4..20 mA

7.5.1 MEASUREMENT PRINCIPLE LEVELMATIC SENSOR
(SIMILAR TO MINILEVEL NT + LEVELTRONIC NT)
The LEVELMATIC sensor is based on the pendulum properties of a friction-free supported disc of a mass
weighing less than 1 gram. A two-phase frequency (2.9 kHz) is supplied to two electrodes, which together
with the pendulum disc supported in the shielded and dust-proof gap between them, build a differential
capacitor. The inclination signal is created at the pendulum. Due to the perfect rotational symmetry of the
sensor, inclinations perpendicular to the measuring axis are of insignificant influence to the measurement,
and even overhead measurements are possible.
The shielded sensor and the capacitive measuring principle make the system insensitive to magnetic and
electric fields.
With this pendulum system, extremely
accurate results in terms of repetition and
hysteresis combined with very short reaction
times have been achieved.
Applications:
• Levelling of a platform
• Inclination measurement on bridges or
buildings
• Supervision of machine tools
• Levelling of machines
• etc.
Remark:
Analog LEVELMATIC sensors are increasingly being replaced by ZEROTRONIC digital sensors. Besides
being more accurate, ZEROTRONIC sensors have a more compact design and provide a digital output
signal which allows further treatment with various software.
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