Instruction Manual, Type 9195E - WIM

Frequently Asked Questions (FAQ)
12. Frequently Asked Questions (FAQ)
Available lengths of Lineas ® sensors
The lengths of the Lineas sensors are 1,00 m and 0,75 m.
For one row across a lane 4 sensors are usually required.
The standard configuration is 2 sensor rows per lane.
Please check carefully the actual lane width at the planned
WIM sites and be aware that the regular cable length
attached to the Lineas is 40 m and 100 m thus the electronic
cabinet should not be too far away.
Responsibility of an installation
It is a requirement of Kistler that the installation is supervised
by a Kistler engineer or Kistler certified engineer.
This Kistler certified Engineer is responsible for the whole
installation, the discontinuance in case the requirements
are no longer met, as well as for the time of opening of the
lane for traffic.
Kistler is happy to assist and train the customer at cost price
and will issue a certificate (for person not organization) if the
installation and training were successful. The certificate is valid
for a specified time.
Companies who are interfacing the Lineas ®
sensor
There are several companies in Europe, North America, the
Far East and Australia that have successfully adapted their
electronics and software to integrate the Lineas sensor into
their measuring chain.
Regrinding of the Lineas ®
sensor
Lineas sensors have a topcoat with a thickness of 10 mm
(the same material as the grouting material) designed for
re-profiling by grinding less than 9 mm.
If a pavement has a rut depth of e.g. 10 mm, the road
cannot be regarded as a suitable WIM site, as vertical
oscillations of the vehicles will induce dynamic weight
deviations which exceed the requirements considerably.
It is strongly recommended to have a pavement without
rutting before installing the WIM site. If there is already a
rutting of above 4mm, we suggest to repave the road. It is
very important to have an even surface in order to achieve
excellent results.
Traveling over the Lineas ® sensor with a flat tire
The load bearing capacity of the Lineas surface is over
200 kN per twin wheel and local load concentrations up to
the Mega Pascal range had been tested successfully. From
all the sensors operating in many countries, we have no
indication that flat runners have ever caused a failure.
Performance over the total sensor length at delivery
Kistler guarantees that all delivered Lineas sensors have a
uniform sensitivity within +/-3 % over the length of the
sensor. One channel usually consists of 2 sensors which are
paired according to their sensitivity and have an uniformity
of approx. +/-3 % over the width of the whole measuring
channel.
002-300e-07.04 (200-348e) Page 27