The technical status at the time of delivery of the device and instructions is decisive, unless other infor-
mation is provided. We reserve the right to make technical changes without special notice. Earlier in-
structions lose their validity. The General Conditions of Sale and Delivery of Hydrotechnik GmbH apply.
Disclaimer
We guarantee the fault-free functioning of our product in accordance with our advertising, the product
information published by us and this manual. Further product characteristics are not promised. We ac-
cept no liability for economic efficiency and faultless function, if the product is used for a purpose other
than that described in the section "Intended use".
Compensation for damages is generally excluded, except in cases of intent or gross negligence on the
part of Hydrotechnik GmbH or if promised product properties are not available. If this product is used in
environments for which it is not suitable or which do not meet the technical standard, we are not respon-
sible for the consequences.
We accept no liability for damage to equipment and systems in the vicinity of the product caused by a
fault in the product or in this manual.
We are not responsible for the infringement of patents and/or other rights of third parties outside the
Federal Republic of Germany.
We are not liable for damage caused by improper operation and not following the instructions in this
manual. We are not liable for loss of profit and consequential damage due to non-observance of safety
and warning instructions. We accept no liability for damage caused by the use of accessories and/or
wearing parts that were not supplied or certified by Hydrotechnik GmbH.
The products of Hydrotechnik GmbH are designed for a long service life. They correspond to the state
of science and technology and were individually tested in all functions before delivery. The electrical and
mechanical construction complies with the applicable standards and guidelines. Hydrotechnik GmbH
conducts ongoing product and market research in order to promote the continuous development and
improvement of its products.
In case of malfunctions and/or technical problems, please contact the Hydrotechnik GmbH customer
service. We assure you, that suitable measures will be taken immediately. The warranty conditions of
Hydrotechnik GmbH apply, which we will be pleased to send you on request.
Intended use
The device "QL 326" is a load line controlled via a bus system, which is equipped with a proportional
pressure relief valve with preamplifier. It is used to measure pressure, volume flow and temperature.
The integrated proportional valve can be used to simulate a load in order to measure the behaviour of,
for example, a hydraulic pump under load. A pre-programmed pressure curve (setpoint 0...100% corre-
sponding to 0...10V) of the load curve is run to obtain reliably reproducible test sequences. No set-
point/process value comparison is carried out and no control is performed.
Any other use of this device is considered improper. If you have any questions or wish to use the unit for
any other purpose, please contact our customer service. We will be happy to help you with any neces-
sary configurations.
