User manual

Released 03/2008 Rights reserv ed f or change in technical data! HYGROSENS INSTRUMENTS GmbH Postf ach 1054 D-79839 Löf f ingen Tel: [phone] Fax: [phone]
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LEVEL CONTROLLER FOR
CONDUCTING LIQUIDS
1 General dangers and precautions
1.1 Instructions regarding documentation
Please carefully read the following instructions before putting into operation! The
symbols used in the operating manual are to make you careful, before hand,
regarding safety considerations and dangers. But, in no way, these symbols can
substitute the text of the associated safety instructions. Therefore, the instructions
should also be always read in full detail!
This symbol indicates likely danger for persons, material or environment. The
information provided in the associated text should be duly followed to avoid any kind
of risk.
This symbol refers to important application notes and tips, which are necessary for
successful working and should to be absolutely followed to ensure good results.
1.2 Safety instructions
Please read these instructions, carefully and completely, before putting the device into
operation. Please also comply and follow the safety instructions, specially the safety
regulations related to the devices to be operated on mains supply.
The product should be installed and used only for the intended applications as
described in these instructions. Any other application is not advised and shall lead to
loss of guarantee and exclusion from liability. This also applies to any changes or
other modifications carried out on the device by the user.
Defective safety devices should be replaced with same type of items in respect of trip
current rating, tripping characteristics, and mechanical fitment dimensions. Bypassing
protections lead to a considerable safety risk, and hence, is not allowed under any
circumstances.
The connection terminals may be wired to mains voltage. Contact with live parts lead
to fatal dangers. The mounting and maintenance operations should be carried out by
only trained personnel, who are authorised on the basis of technical training in this
field. The applicable safety regulations should be followed. The switching device must
be assembled in a switching cabinet or a fully closed plastic housing. Mounting and
servicing operation should be carried out only after switching off the voltage.
The product is not meant for controlling electrical systems which perform safety
related functions. In normal operation also, there is always a danger of malfunctioning
due to failure of any component or any other disturbance. The user has to ensure that
there are no consequential damages due to malfunctioning or undefined switching
status of the relay. This is all the more possible, if heavy loads like heaters or motors
are triggered with the relays.
The device is not suitable for use in medical instruments or swimming pools. The user
has to take suitable measures (e.g. grounding the metallic container) to take care that
there is no danger of electric shock in the medium. The safety regulations applicable
for special applications should be absolutely followed by the user ! The controller is
only suitable for mounting in dry locations.
The liquids suitable for application of this device are all types of non-combustible,
aqueous, non-corrosive and unpolluted liquids e.g. tap water. The device is not
suitable for combustible, non-conducting liquids!