The instruments described in the operating instructions has been manufactured using
state-of-the-art technology.
All components are subject to stringent quality and environmental criteria during
production. Our management systems are certied to ISO 9001 and ISO 14001.
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These operating instructions contain important information on handling the instrument.
Working safely requires that all safety instructions and work instructions are observed.
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Observe the relevant local accident prevention regulations and general safety
regulations for the instrument's range of use.
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The operating instructions are part of the instrument and must be kept in the immediate
vicinity of the instrument and readily accessible to skilled personnel at any time.
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Skilled personnel must have carefully read and understood the operating instructions,
prior to beginning any work.
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The manufacturer‘s liability is void in the case of any damage caused by using the
product contrary to its intended use, non-compliance with these operating instructions,
assignment of insuciently qualied skilled personnel or unauthorised modications to
the instrument
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The general terms and conditions, contained in the sales documentation, shall apply.
... points out useful tips, recommendations and information for ecient and
trouble-free operation.
DANGER!
...identies hazards caused by electric power. Should the safety instructions
not be observed, there is a risk of serious or fatal injury.
WARNING!
... indicates a potentially dangerous situation in a potentially explosive
atmosphere, resulting in serious injury or death, if not avoided.
2. Safety
WARNING!
Before installation, commissioning and operation, ensure that the
appropriate instrument has been selected in terms of measuring range,
design and specic measuring conditions.
Serious injuries and/or damage can occur should these not be observed.
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Further important safety instructions can be found in the individual chapters
of these operating instructions.
2.1 Intended use
The model LSO.06 transducer is used for limit value detection in liquids. The
model LSO.25 switching amplier may be used in conjunction with the model LSO.06
transducer for overow control. The instruments are very robust and designed for rough
operating conditions.
These instruments have been designed and built solely for the intended use described
here, and may only be used accordingly.
The technical specications contained in these operating instructions must be observed.
Improper handling or operation of the transducer and the switching amplier outside of its
technical specications requires the instrument to be shut down immediately and inspected by an authorised WIKA service engineer.
The manufacturer shall not be liable for claims of any type based on operation contrary to
the intended use.
Skilled personnel are understood to be personnel who, based on their technical training,
knowledge of measurement and control technology and on their experience and
knowledge of country-specic regulations, current standards and directives, are capable
of carrying out the work described and independently recognising potential hazards.
Special operating conditions require further appropriate knowledge, e.g. of aggressive
media.
2.3 Additional safety instructions for instruments with ATEX approval
Risk of injury should qualication be insucient!
Improper handling can result in considerable injury and damage to
equipment.
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The activities described in these operating instructions may only be
carried out by skilled personnel who have the qualications described
below.
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Keep unqualied personnel away from hazardous areas.
WARNING!
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Non-observance of these instructions and their contents may result in the
loss of explosion protection
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Observe the European Use Directive (EN 60 079-10:1996 )
2.4 Special hazards
WARNING!
Observe the information given in the applicable type examination certicate
and the relevant country-specic regulations for installation and use
in potentially explosive atmospheres (e.g. IEC 60079-14, NEC, CEC).
Non-observance can result in serious injury and/or damage to equipment.
For additional important safety instructions for insturments with ATEX
approval see chapter "2.3 Additional safety instructions for instruments with
ATEX approval".
WARNING!
For hazardous media such as oxygen, acetylene, ammable or toxic gases
or liquids, and refrigeration plants, compressors, etc., in addition to all
standard regulations, the appropriate existing codes or regulations must also
be followed.
To ensure safe working on the instrument, the operating company must
ensure
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that suitable rst-aid equipment is available and aid is provided whenever
required.
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that the operating personnel are regularly instructed in all topics regarding
work safety, rst aid and environmental protection and knows the
operating instructions and, in particular, the safety instructions contained
therein.
DANGER!
Danger of death caused by electric current
Upon contact with live parts, there is a direct danger of death.
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Electrical instruments may only be installed and mounted by skilled
electrical personnel.
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Operation using a defective power supply unit (e.g. short circuit from the
mains voltage to the output voltage) may result in life-threatening voltages
on the instrument!
WARNING!
Residual media in dismounted instruments may result in a risk to people, the
environment and the system. Take sucient precautionary measures.
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Do not use this instrument in safety or Emergency Stop devices. Incorrect
use of the instrument can result in injury.
Should a failure occur, aggressive media with extremely high temperature
and under high pressure or vacuum may be present at the instrument.
Before mounting and commissioning the instrument, ensure you read
the operating instructions!
CE, Communauté Européenne
Instruments bearing this mark comply with the relevant European directives.
ATEX European Explosion Protection Directive
(Atmosphère = AT, explosible = Ex)
Instruments bearing this mark comply with the requirements of the European
Directive 94/9/EC (ATEX) on explosion protection.
The transducer is used for measuring liquid level limits.
The conical tip of the sensor ensures really precise on-off performance level sensing.
Its reaction is independent of various physical parameters of the liquid such as density,
dielectric constant, conductivity, colour or refractive index. This allows the use for safe
level switching as well as for precise level control applications. If there is any foam you
even can decide whether to use the sensor for foam level or liquid level control, suppressing the influence of foam on switching.
If the sensor is supplied with a U-tip, it is able to sense changes in refractive index. So it
can be used for example as an interface level switch for liquids.
Principle of operation
Separation layer, U-tip
e.g. oil
e.g. water
Principle of operation
Level, conical tip
Gas
Liquid
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Application range
High pressure
version with
heatsink
threaded
connection G ½ A
Medium temperature in °C
Standard pressure version
without heatsink
threaded connection
Working pressure in bar
High pressure
version with
heatsink
threaded
connection NPT ½
Medium temperature in °C
Working pressure in bar
All typs of transducers need a switching ampliers model LSO.25 for power supply and
switch state signalling.
Each unit consists of a transducer and a controller (switch amplier). The transducer may
be of one-piece or multi-part design. Ex types are generally constructed as multi-part
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types. Multi-part transducers can be equipped with a heat-sink to expand the temperature
range.
4.2.1 Transducer model LSO.06
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Without extension
Fixed measuring length ML, no extension
possible. Protection ngers are part of the
sensor housing.
Light guide Ø 7
Sensor
housing
*) 20 for high pressure sensor
Sensor
body
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With extension
Measuring length ML from 50 to 960 mm.
Extension tube screwed into sensor
housing.
Preferential measuring lengths:
50, 60, 80, 90, 100, 120, 150, 200, 300,
600 and 800 mm
Values between these can be delivered
using variable-length types
For increased temperature range
Extended temperature range with heatsink. This may be combined with xed ML 25
mm and with extended types.
heatsink
*) 20 for high pressure sensor
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Fitted with ange
Design with ange from DN25 and
from PN6 or ANSI, all forms of the
sealing face. Explosion-protected
instruments are usually seal-welded
to the sensor component (in this case,
the hexagon is omitted).
For explosion protected version please note the following
The amplier is designed as a plug-in card for a 19" plug-in card. The plug-in card alone
doesn't fulll the ingress protection IP 20 in accordance with EN 60529: 1991. It only is
intended for the installation into a suitable rack which guarantees the minimum ingress
protection IP 20. Not used plug-in places have if necessary to be covered with blind plates.
The distances and tracking distances particularly are between the individual plug-in cards
as well as the intrinsic safe and not intrinsic safe circuits, the requirements on the wiring as
well as the excess temperature and the dissipation power converted in the assemblies are
to take into account according to
ers are provided with an encoding system. It has to be made sure that the counter-strip is
executed availably and identically in the 19" rack.
Default coding
Supply voltage
version
AC 230 VB-C-D-E-F-G-H-J1
AC 115/120 VA, C-D-E-F-G-H-J2
AC 24 VA-B, D-E-F-G-H-J3
DC 24 VA-B-C, E-F-G-H-J4
Encoder-strip rack,
provided at these positions
with coding pins
EN 60079-11:2007
. To avoid mistakes, the switch ampli-
Encoder-strip plug-in card,
provided at these positions with one
coding pin
:
Encoder-strip plug-in card
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Encoder-strip rack
Example: AC 230 V supply voltage version
We exclusively recommend the use of suitable racks for the guarantee of the requirements
to WIKA.
Alternatively the coding can take place directly in the female connector (rack side) and the
associated male connector (switching amplier side) after the following coding plan:
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The coding pin is inserted with a tool captive in the appropriate place in the female
connector and at the opposite side in the male connector is a drilling.
Check instrument for any damage that may have been caused by transport.
Obvious damage must be reported immediately.
5.2 Packaging
Do not remove packaging until just before mounting.
Keep the packaging as it will provide optimum protection during transport (e.g. change in
installation site, sending for repair).
5.3 Storage
Permissible conditions at the place of storage:
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Storage temperature: -25 ... +70 °C
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Humidity: 35 ... 85 % relative humidity (no condensation)
Avoidance of exposure to the following factors:
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Direct sunlight or proximity to hot objects
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Mechanical vibration, mechanical shock (putting it down hard)
Store the instrument in its original packaging in a location that fullls the conditions listed
above. If the original packaging is not available, package and store the instrument as
described below:
1. Wrap the instrument in an antistatic plastic lm.
2. Place the instrument, along with shock-absorbent material, in the packaging.
3. If stored for a prolonged period of time (more than 30 days), place a bag, containing a
desiccant, inside the packaging.
GB
WARNING!
Before storing the instrument (following operation), remove any residual
media. This is of particular importance if the medium is hazardous to health,
e.g. caustic, toxic, carcinogenic, radioactive, etc.
Before the installation a check of the function can be carried out. The device attached
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provisionally and the glass tip are one and from dived to this for the test in a glass with
liquid (adjustment if necessary, see chapter "7.2 Adjustment with CAL").
WARNING!
The electrical connection only be carried out by qualied skilled personnel.
Observe the appropriate VDE regulations.
6.1 Installation instructions transducer model LSO.06
The sensors may be installed in any direction, i. e. from top, bottom, sideways or inclined.
In some special applications it is recommended to use following hints:
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High viscosity: sideways or from bottom
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Dry Running protection for pumps:
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Overll prevention devices: usually vertically from above
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Vertical installation
if the pipes to or from the pump are installed
horizontally use top mounting for fast detection of
liquid
Installation model LSO.06 from top with ange
connection e. g. as overow control.
Carried out work only after a complete pressure balance.
Take corresponding safety and environmental protective measures.
Model LSO.06 built-in to pipe or tank wall
laterally, here, for example, as dry-run
protection into the suction or pressure line of
a pump, slightly oset from the centre and
provided with a screen so that it is unaected by gas bubbles.
In the model LSO.06 used here, the
measurement length ML is xed at 25 mm.
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The glass tip should have a distance of at least 10 mm to an opposite wall after assembly
having been carried out. This minimum distance can vary depending on geometry and
surface composition of the wall (e.g. with electropolished pipes 20 ... 30 mm).
Screw directly into the corresponding threaded coupling using a metallic seal or, with the
anged version, connect with a ange (observe DIN/ANSI).
CAUTION!
Assemble the transducer with caution and care, particularly respected on
the break risk of the glass. Take measures for the protection of the transducer head if a lateral load has to be expected. The operating company
has to provide the suitable choice of the seal diameters and materials. The
torque corresponds in the pipe line engineering for usual values. Install the
transducer unstressedly.
The transducer may not be charged at the side under any fuss when
installing and in the built-in condition at the sensor head (see chapter
"9.2 Repair"). When screwing into a connection thread do not use the
sensor head for turning.
Every device is subjected to a pressure examination in the work. If in the plant still a
strength examination (system pressure examination) be required, pressure may not
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exceed the examining pressure means 1.5 times the indicated pressure on the type plate
and the ange.
CAUTION!
For all examinations and uses, in principle, these are indicated on the type
plate authoritatively!
6.2.2 Switching amplier model LSO.25 (in makrolon housing)
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Prepare mounting holes (see gure below)
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Detach the clear cover from the housing
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Insert mounting screws from cover side into the mounting holes
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Tighten the mounting screws
mounting
holes
6.3 Electrical connection
WARNING!
For the electrical connection, comply with all relevant regulations.
The transducer and switching amplier connections are both marked with the colors WS
(white) respective 2d, BR (brown) respective 4d and GN (green) respective 6d. Connect
them according to the connection plan.
The cable must not be shielded, however, should not be laid directly besides strong
electrical interference sources either. Including line resistance, contact resistance goes
the maximum line length and with that by the following table the maximum:
Wire cross section
in mm²
0.51756.3
0.753007.2
1.04007.2
1.56007.2
A complete resistance of 9 Ω, inclusive of contact resistances, should not be exceeded
since otherwise a failure signal is carried out.
In addition, for the explosion-protected version, a max. inductance of
L
≤ 0.5 mH and a max. capacitance of Ca ≤ 3 µF must be observed (incl.
a
switching amplier values).
Connection diagram transducer and switching amplier
Ex zone 0/1Safe area
Wiring length
in m
Wiring resistance
in Ω
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Switching amplier model LSO.25
Transducer
model LSO.06
SignalFailure
The instrument can
be connected to
earth.
For the explosion-protected version, a light-blue cable or one marked
light-blue must be installed from the switching amplier to the transducer
(intrinsically safe circuit). The switching amplier is located in the
non-hazardous area and the measuring body of the transducer in a Zone 1
area.
Earth can be connected at the internal earthing screw (is not necessary for intrinsic safety)
or the connection is carried out via the metallic contact of the screwing thread with the
container.
6.3.2 Switching amplier model LSO.25
19" plug-in card
First check, if the existing supply voltage agrees with the voltage version of the switching
amplier should be checked rst (see marking on the circuit board).
230 V ~ LSO.25-X1X
115/120 V ~ LSO.25-X2X
24 V ~ LSO.25-X3X
24 V = LSO.25-X4X
24 V = without potential separation LSO.25-X7X (only for standard)
At the plastic case version the line terminals "supply" is marked with the operating
voltage in addition and it is the connection to see directly from the imprint. Carry out the
connection in accordance with "Connection diagram transducer and switching amplier"
on page 22.
Pin assignment of plug-in card
d 28 (c28) = N (-)
d 30 (c30) = L (+)
6.5 Connection relay
The signals "signal" and "failure" are provided for per a relay with change over contacts.
These are potential-free and can be used for every arbitrary application. At the mounting
case version the connections can be seen directly from the imprint on the pcboard.
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Pin assignment of plug-in card
FailureSignalContact
4/d181/d24NO
5/d162/d22NC
6/d143/d20root
6.6 Function control
After wiring been carried out and checked the supply can be switched on. One of the
yellow LED's should come on now. By pressing the button "test" at closed switch S2 (time
delay turned o) one of the two yellow LED shines approx. 1 s. After this the other yellow
LED is ashing as long as the test button remains pressed. This shows that wiring and
switch ampliers are all right. If this should not be the case, follow the justage instructions
see chapter "7.2 Adjustment with CAL".
Please observe the actions to be taken in the event of any faults that may
occur, see chapter "10. Troubleshooting".
This is only required at the rst putting into operation or after the wiring to compensate for
all variable inuences of the measuring equipment.
Calibrate only when the sensor tip is in the medium with higher refractive index, e. g.:
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Levelliquid/gas = in the liquid
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Separation layer e. g. water/oil = in oil
The photo transistor voltage can be measured between "GN" and "WS" of the transducer
connection with a voltage instrument (Ri ≥ 10 MOhm Messbereich 10 V=).
Voltage between GN / WS in V
1)
dry
Level (conical tip)0.2 - 1.0
1) do not adjust, only check this value
2) 0.2 V at short measuring lengths and clean conical tip, up to 1.0 V at larger measuring lengths and
dirty conical tip.
3) adjust this value in the immersed condition only, the switching quality of the system transducer/
switching amplier can be inuenced by variation of this value:
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approx. 4.5 V = less drop sensitive, foam insensitive
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approx. 5.0 V = normal low viscous, clean application, no inuence of temperature uctuations
of
the medium up to ±25 °C
■
approx. 5.5 V = at strong temperature uctuations of the medium up to ±40 °C
■
approx. 6.0 V = detektion of condensation, foam (must have stable, reproducible qualitiy)
2)
immersed
3)
4.5 - 6
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Voltage between GN / WS in V
dry
(lower refractive index)
Separation layer (U-tip)
4) do not adjust, only check this value
5) the tension takes o two media and at this measuring of the refractive index dierence can therefore vary strongly.
6) adjust this value only when the sensor tip is immersed from the medium with higher refractive
index.The switching quality of the system sensor/amplier can be inuenced by variation of this
value.
To get a stable measuring it should be tried to adjust a dierence as big as possible between these
two values
The switch S2 is a wire-hook switch and is to or switch o the delay of the signal relay
which separated is adjustable for relay energize and release, e.g. at restless surface or
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strong fumigations or formations of bubbles in the liquid.
No time delay: ■ Close S2 or shorten by soldering
With time delay: ■ Time to energize relay ( _↑ ) with P1 as required (0 ... 8 s) adjust
■ Release time ( ↓_ ) with P1 as required (0 ... 8 s) adjust
Factory settings: ■ S2 open, P1 and P2 middle position (ca. 3 ... 4 s)
7.4 TEST Procedure
Test expiry when pressing the test button:
Test button pressedTest button released
S1 open
S2 openS2 closedS2 openS2 closed
Sensor tip
Transducer
immersed
S1 closed
S1 open
S1 closed
S1 open
Sensor tip
Transducer
dry
S1 closed
S1 open
S1 closed
LED o
LED ashes
LED permanent on
Legend:
BEN = immersed
TRO = dry
tD = delay time to adjust with P1 and P2
P1 and P2 middle position, ca. 3 - 4 s time delay if P2 is open
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Transducer correct connected and in function
■
No failure present
The time delay is, with S2 open, = switched on, must suciently be pushed for a long time
the button so that the complete test can go o. No test can go o, the alarm was already
entitled taken there is with S1 open, S2 open and sensor tip immersed. The same applies
S1 closed, S2 open and sensor tip dry. Failure, LED red and a yellow one ashes, can go
o no test at.
The test function makes possible a checking the measuring chain switching amplier
separately and e.g. post-connected signal amplier, signaling devices, control devices or a
correction device at a connected and operating transducer and a reliable information gives
about the proper function of the circuit board.
7.5 Operating characteristics relay SIGNAL
see table "Fault effect to dry/immersed", page 25
7.6 Operating characteristics relay FAILURE
The relay failure is energized in the normal operation and releases under the following
conditions (fail safe behavior):
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The supply voltage breakes down (>100 ms)
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The internal supply voltage for the intrinsic safe circuit breakes down
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Short circuit (BR-WS) or interruption to infrared-LED (BR)
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Short circuit (GN-WS) or interruption to phototransistor (GN)
8. Notes for mounting and operating ... / Maintenance, ...
8. Notes for mounting and operating in hazardous areas
Zone 0 for Transducer model LSO.06
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If medium touched parts consist of titanium, the operator has to take care that no metallic
ttings can beat to the sensor parts and therefore could trigger a blow spark in the container. Perhaps a protection cage has to be attached outside the container around the sensor
head.
Ambient temperatures
If the transducer is installed vertically, the operating company has to provide it, the max.
temperatures indicated in the technical data do not exceed at all over, for Ex version
T6: +60 °C and T5: +75 °C.
CAUTION!
When a fault occurs, the repair should be by the manufacturer or by the
system operator and approved by a factory expert.
9. Maintenance, repair and cleaning
9.1 Maintenance
As a rule, these instruments are maintenance-free.
Stronger pollution is in the plant, however, recommends himself to make a maintenance
instruction. Perhaps this can conne himself to an electrical measuring of the voltage
between GN and WS of the transducer:
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Immersed (BEN) in the rule 5 V *)
■
Dry (TRO) in the rule 0,2 ... 1 V *)
*) see table page 26 (separation layer) and table page 30
Repairs must only be carried out by the manufacturer.
At broken glass send in the transducer for repair see chapter "12.2 Return".
9.2 Repair
For repairs, only spare parts recommended by us are to be used. Repairs must be agreed
upon with us in writing, otherwise our warranty and responsibility will become void.
Transducer
It is not expected that the plant operator will carry out any repairs himself. If the system
operator wants to carry out a repair, at his own, he must obtain permission from the
manufacturer.