ALTHEN NM1 4L Series, Instruction Manual

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2 Instructions for use of the measuring amplifier
Notice: The parameterizations, closer information concerning the scaling as well as the customized
analogue output can be found on the additional sheet "Device-Configuration".
Since this amplifier is a highly sensitive measurement technology product, it must be used for its
intended use as well as the described operating conditions only. Initial start-up and changes in setup
and settings must be done by qualified personnel only. To prevent interventions / modifications made
by unauthorized personnel, suitable measures must be taken. Both function and calibration must be
checked regularly.
The amplifier must be operated with a separate power source used for measurement devices only.
Shielded cables, preferably twisted in pairs should be used only. The EMC-installation instructions must
be complied with.
The amplifier is contained in an aluminum housing which is equipped with an EMC- cover gasket as
well as EMC-cable glands. After initial start-up the lid is to be closed properly.
The tilt measuring system must be connected to clean earth-potential. Please refer to the EMC-
Mounting-Instructions in order to connect the sensor-shields correctly. To avoid possible potential
equalization currents over the shield of the cable to the following evaluation unit, this shield should be
connected over a suitable capacitor (10 nF / 200 V).
Overall the shield connections must be done properly to EMC-standards (as short as possible with large
wire cross-section) and connected to a central point (star grounding). In order to not increase the
disturbance sensitivity of the amplifier, all cables should be kept as short as possible and should not be
extended. Possible cable-bound disturbances (i.e. noise) must be blocked very near the cable ends
(evaluation unit) by suitable measures.
If it is to be expected that the amplifier is, as example, cleaned with a high-pressure cleaner/ steam jet
an additional protection shall be provided.
Notice: Changes of the measuring system of any kind demand for the explicit approval of Althen Mess-
& Sensortechnik GmbH. Changes of any kind done without that approval exclude all possible warranty
and/or liability of Althen Mess- & Sensortechnik GmbH.
Please note that the tilt measuring system responds not to inclination changes only, but as well to
vibrations and to acceleration forces. If necessary and been ordered, a low pass filter can be installed.
The one axis tilt measuring system is intended for sidewall montage.
The dual axis tilt measuring system is intended for base montage.