Intended use
Foreseeable misuse
9
© Lutz-Jesco GmbH 2014
Subject to technical changes.
140725
BA-10103-02-V01
Stepper Motor-driven Diaphragm Dosing Pump
MEMDOS SMART LK
Operating instructions
3 Intended use
3.1 Notes on product warranty
Any non-designated use of the product can compromise its function or
intended protection. This leads to invalidation of any warranty claims!
Please note that liability is on the side of the user in the following cases:
The dosing pump is operated in a manner which is not consistent with
these operating instructions, particularly the safety and handling
instructions and the chapter entitled 3 „Intended use“ on page 9,
If people operate the product who are not adequately qualifi ed to carry
out their respective activities,
no original spare parts or accessories of Lutz-Jesco GmbH are used.
Unauthorised changes are made to the device by the user,
The user uses different dosing media than those indicated in the
order,
The user does not use dosing media under the conditions agreed with
the manufacturer such as modifi ed concentration, density, tempera-
ture, contamination, etc.
3.2 Intended purpose
The MEMDOS SMART LK dosing pump is intended for the following
purpose: the conveying and dosing of liquids.
3.3 Device revision
This operating manual applies to the following devices:
Device
Month / year of manufacture
Firmware
MEMDOS SMART LK
03/2014 onwards
From 1.43
Tab. 4: Device revision
3.4 Principles
Before delivery, the manufacturer inspected the dosing pump and
operated it under specifi c conditions (with a specifi c dosing medium
with a specifi c density and temperature, with specifi c pipe dimen-
sions, etc.) Since these conditions vary at every installation location,
you must calibrate the dosing pump after delivery. For information on
the calibration procedure refer to 11.1.3 „Calibrating the dosing
pump“ on page 41. For details on the approximate values and the
capacity of the dosing pump, refer to the chapter entitled 15 „Delivery
characteristic curves“ on page 53.
Information on the usage and environment (see chapter 5 „Technical
specifi cations“ on page 14) must be observed.
Any restrictions regarding the viscosity, temperature and density of
dosing media must be followed. You must only use dosing media at
temperatures above freezing point or below the boiling point of the
respective medium.
The materials of the dosing pump and hydraulic parts of the system
must be suitable for the dosing medium that is used. In this connec-
tion, note that the resistance of these components can change in
dependence on the temperature of the media and the operating
pressure.
i
Information on the suitability of materials combined with
different dosing media can be found in the Compatibility Chart
of Lutz-Jesco GmbH.
The information in this resistance list is based on informaiton
form the material manufacturers and on expertise obtained by
Lutz-Jesco from handling the materials.
As the durability of the materials depends on many factors,
this list only constitutes initial guidance on selecting material.
In all cases, test the equipment with the chemicals you use
under operating conditions.
The dosing pump is not intended for outdoor use unless appropriate
protective measures have been taken.
Avoid leaks of liquids and dust into the casing and avoid direct
exposure to sunlight.
You must never operate dosing pumps in a potentially explosive
atmosphere if they do not have corresponding nameplates or an
appropriate EC Declaration of Conformity for potentially explosive
atmospheres.
3.5 Prohibited dosing media
The dosing pump must not be used for these media and substances:
Gaseous media,
radioactive media,
solid substances,
combustible media,
all other media that are not suitable for delivery using this dosing
pump.
3.6 Foreseeable misuse
Below, there is information about the applications of the dosing pump or
associated equipment that are not considered to be intended use. This
chapter is intended to allow you to detect possible misuse in advance and
to avoid it.
Foreseeable misuse is assigned to the individual stages of the product
lifetime:
3.6.1 Incorrect assembly
Unstable or unsuitable bracket
Dosing pump bolted wrongly or loosely
3.6.2 Incorrect hydraulic installation
Suction and pressure lines dimensioned incorrectly
Unsuitable connection of the pipes due to wrong material or
unsuitable connections.
Suction and pressure lines mixed-up
Damage to threads due to them being tightened too much
Bending of pipelines
No free return fl ow of the pressure relief valve
Excessive demand due to the pressure differences between the
