Kobold ACS-Z Manuel utilisateur
Operating Instructions
for
Conductivity-/high-purity water cells
with 2-electrode system
Model: ACS-Z
ACS-Z
page 2 ACS-Z K03/1022
We don’t accept warranty and liability claims neither upon this publication nor in
case of improper treatment of the described products.
The document may contain technical inaccuracies and typographical errors. The
content will be revised on a regular basis. These changes will be implemented in
later versions. The described products can be improved and changed at any time
without prior notice.
© Copyright
All rights reserved.
1. Contents
1.Contents ........................................................................................................ 2
2.Note .............................................................................................................. 3
3.Instrument Inspection .................................................................................... 3
4.Regulation Use ............................................................................................. 4
5.General ......................................................................................................... 4
6.Measurement principle .................................................................................. 4
7.Laboratory or industrial cells ......................................................................... 4
8.Ranges .......................................................................................................... 5
9.Electrical connection ..................................................................................... 6
10.Mechanical installation .................................................................................. 7
11.Maintenance/cleaning ................................................................................... 8
12.Fault-finding .................................................................................................. 9
13.Disposal ...................................................................................................... 10
14.EU Declaration of Conformance ................................................................. 11
Sold by:
Kobold Messring GmbH
Nordring 22-24
D-65719 Hofheim
Tel.: +49(0)6192-2990
Fax: +49(0)6192-23398
E-Mail: [email protected]
Internet: www.kobold.com
ACS-Z
ACS-Z K03/1022 page 3
2. Note
Please read these operating instructions before unpacking and putting the unit into
operation. Follow the instructions precisely as described herein.
The instruction manuals on our website www.kobold.com are always for currently
manufactured version of our products. Due to technical changes, the instruction
manuals available online may not always correspond to the product version you
have purchased. If you need an instruction manual that corresponds to the
purchased product version, you can request it from us free of charge by email
([email protected]) in PDF format, specifying the relevant invoice number and
serial number. If you wish, the operating instructions can also be sent to you by
post in paper form against an applicable postage fee.
The devices are only to be used, maintained and serviced by persons familiar with
these operating instructions and in accordance with local regulations applying to
Health & Safety and prevention of accidents.
When used in machines, the measuring unit should be used only when the
machines fulfil the EC-machine guidelines.
If any difficulties should still arise during start-up, please do not carry out any
manipulations on the unit. You could endanger your rights under the instrument
warranty! Please contact the nearest subsidiary or the head office in such a case.
3. Instrument Inspection
Instruments are inspected before shipping and sent out in perfect condition.
Should damage to a device be visible, we recommend a thorough inspection of the
delivery packaging. In case of damage, please inform your parcel service /
forwarding agent immediately, since they are responsible for damages during
transit.
Scope of delivery:
The standard delivery includes:
Conductivity-/high-purity water cells with 2-electrode system model: ACS-Z
ACS-Z
page 4 ACS-Z K03/1022
4. Regulation Use
Any use of the device, which exceeds the manufacturer’s specification, may
invalidate its warranty. Therefore, any resulting damage is not the responsibility of
the manufacturer. The user assumes all risk for such usage.
5. General
These operating instructions are valid for electrolytic conductivity cells as per data
sheets ACS-Z.
Electrolytic conductivity cells are used in conjunction with suitable transmitters for
industrial chemical analysis, to determine the electrolytic conductivity of liquids, or
the resistance in high-purity water.
6. Measurement principle
Two conductive electrodes of a defined surface are immersed in the medium at a
certain distance to each other. They are supplied with an a.c. voltage of a specific
frequency (depending on the measurement range) from a separate transmitter.
Because of the conductive components in the medium (ions, salts), an alternating
current is produced between the electrodes, which the transmitter uses to
determine the conductivity, display it and convert it to a standardized signal.
7. Laboratory or industrial cells
Conductivity cells consist of a flow-through, immersion or screw-in body made from
plastic or stainless steel and the electrodes embedded in it. Depending on the type,
application and measurement range, the two electrodes are made from stainless
steel, titanium or special graphite. The conductivity cells are supplied ex-factory
with a fixed cell constant K [1/cm]. Typical cell constants are, for example. K = 0.01;
0.1; 1.0; 3.0 or 10.0. Intermediate values are possible for customer-specific
versions.
The subsequent transmitter must be set to the cell constant of the cell. In addition,
temperature probes can be incorporated in the cell for specific applications.
ACS-Z
ACS-Z K03/1022 page 5
8. Ranges
The range of electrolytic 2-electrode conductivity cells is physically restricted to a
maximum of 200 mS/cm.
The table below shows the rough division of the ranges, related to the cell constant.
Cell constant K [1/cm] Maximum ran
g
e
0.01 bis 5 µS/cm bzw. 20 MΩcm
0.01 bis 10 µS/cm
0.1 bis 3000 µS/cm
1.0 bis 15 mS/cm
3.0 bis 30 m mS/cm
10.0 bis 200 mS/cm
The actual range limits vary according to the electrode material, style and
subsequent transmitter!
ACS-Z
page 6 ACS-Z K03/1022
9. Electrical connection
Depending on the version, the cells are supplied with an attached cable or
detachable connector.
The connection cable must be run directly to the transmitter, and not via
series terminals. Only use screened cables, preferably those recommended
or supplied by the manufacturer.
Please observe the instructions for the electrical connections in the
operating instructions for the transmitter used.
ACS-Z
ACS-Z K03/1022 page 7
10. Mechanical installation
Please take note of the technical data for your cell (see the manufacturer’s
technical data sheet). The cell must be suitable for the temperature, pressure and
media conditions (including the chemical resistance) prevailing at the site!
Do not make any mechanical modifications to the cell (shortening, drilling into,
bending or scratching the electrodes), as this may seriously impair the proper
functioning of the cell and endanger your rights under the instrument warranty!
The operating position is generally unrestricted. It must, however, be ensured that
the liquid can flow adequately through or around the cell (i.e. the conductive
electrodes of the cell must always be completely enveloped by the liquid), and
constructional measures must be taken to eliminate interruptions in the flow or gas
bubbles.
ACS-Z
page 8 ACS-Z K03/1022
11. Maintenance/cleaning
The electrodes of the electrolytic conductivity cell are in direct contact with the
liquid. It is therefore essential to clean the cell at regular intervals, depending on
how prone the liquid is to contamination.
All suitable domestic cleaning agents may be used for cleaning. Abrasive cleaning
agents are generally bot suitable. The electrodes must not be damaged
mechanically! Deposits can be removed using diluted hydrochloric acid, or by
ultrasonic cleaning, for example.
The use of electrolytic conductivity cells in strongly glutinous, oily or sticky
media is not permissible. In such cases, inductive conductivity measurement
should be used.
ACS-Z
ACS-Z K03/1022 page 9
12. Fault-finding
When investigating faults, all components of the conductivity electrode system
must be taken into account.
Also check the transmitter and the connection cable used, in addition to the cell.
T
y
pe of fault Possible cause Removal
Measurement too high
or too low.
Cell is dirty. Chapter 11
“Maintenance/cleanin
g
”
No conductivity
measurement. (e.g. “0”
display)
Cable break, wrong pin
assignment.
Cell in air (not
enveloped).
Check electrical
connection again
carefully.
Check installation site of
cell: is liquid present?
No temperature
measurement (for cells
with integral
temperature probe
)
.
Cable break, wrong
electrical connection.
Check electrical
connection again
carefully.
Displayed value is not
stable, unsteady.
Errors due to
-wrong/inadequately
screened connecting
cable
-
g
as bubbles
Check cable connection
and layout.
Check installation site and
position of cell, alter it, if
necessar
y
.
The cell can also be checked for short-circuits or internal contact problems. This
can be done using a continuity tester (e.g. the diode tester of a multimeter).
ACS-Z
page 10 ACS-Z K03/1022
13. Disposal
Note!
Avoid environmental damage caused by media-contaminated parts
Dispose of the device and packaging in an environmentally friendly manner
Comply with applicable national and international disposal regulations and
environmental regulations.
Batteries
Batteries containing pollutants are marked with a sign consisting of a crossed-out
garbage can and the chemical symbol (Cd, Hg, Li or Pb) of the heavy metal that
is decisive for the classification as containing pollutants:
Cd1 Hg2 Pb3 Li4
1. „Cd" stands for cadmium
2. „Hg" stands for mercury
3. „Pb" stands for lead
4. „Li" stands for lithium
Electrical and electronic equipment
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