WCA November 2010

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Testingand measuring
Wire & Cable ASIA – November/December 2010 64
Optical length and
speed measurement
In highly automated production processes measurement of operational throughput
delivers essential data to control process parameters or, as in the manufacturing
of piece goods, an automatic start and end recognition mechanism allows
autonomous length measurement.
When working with hot, elastic, highly sensitive or dough-like materials, it is
impossible to use tactile sensors such as odometers or tacho rolls. The accuracy
of a mechanical sensor system is also reduced by slippage, which in practice can
lead to measuring errors of 10% or more.
In both cases, non-contact optical metrology provides significant benefits. With
the Speel 3000, Zumbach offers a gauge that can be used for applications that
demand a high degree of accuracy at high velocities.
Speel 3000 is available for a measuring distance of 300mm and is said to achieve
an accuracy of 0.05% or better. The measured length is transmitted to subsequent
electronics using an industry standard incremental interface. An alternative
synchronous serial interface (SSI) is also available.
In addition, an electrical output signal compatible with common incremental
encoders is available and can be directly connected to control systems, electrical
counters or frequency inverters.
The main features of Speel 3000 include:
• Speed range up to 3,000m/min
• Detection of standstill
• Detection of direction
• Start and end recognition
• Allows deviation of the measuring
distance
• Suits smooth and rough surfaces
• Long life LED illumination
• Maintenance free
Zumbach Electronic AG – Switzerland Fax: +41 32 356 0430
Email: Website :
Testing for power generation
Highvolt is among leading manufacturers in high-
voltage (HV) and high-current (HC) test systems
and measuring equipment, particularly for the
testing of components for power generation and
distribution.
Customers from the power cable industry –
particularly manufacturers and users of XLPE-
insulated MV, HV and EHV cables – account for
almost half of the annual turnover.
Highvolt specialises in supplying customised
and purpose-made on-site test systems, as
well as complete cable test fields consisting of
HV resonant test circuits supplemented by PD
measuring technology, cable end termination
systems and shielded HV test rooms.
The demand for Highvolt’s complete Routine Test
fields has continued to increase since 2004.
Highvolt Prüftechnik Dresden GmbH – Germany Fax: +49 351 84 25 679
Email: Website:
Highvolt AC resonant test ❍
❍
system; photo courtesy of
Demirer Kablo AS
Non-contact length measurement from ❍ ❍
Zumbach