2.2 Application areas ................................................................................................................................8
8.2 Further accessories .......................................................................................................................... 39
8.3 Replacement and wear parts............................................................................................................ 39
Section 9 Warranty and liability........................................................................................................... 41
Section 10 Contact information .......................................................................................................... 43
3
Table of Contents
4
Section 1Specifications
From software version 1.6. Subject to change.
Measurement
Principle of operationSamples delivered under pressure, homogenized using ultrasound
Interval12 to 20 minutes
Sample quantityFor up to 2 PHOSPHAX sigma or TOCTAX process photometers
Tube length10 m, 20 m, 30 m (393.7 in, 787.4 in, 1181.1 in)
Suction heightMaximum 7 m (275.6 in) (with tube of length 30 m (1181.1 in): maximum 6 m 236.2 in)
Environmental conditions
Control unit: +5 °C to +40 °C (+41 °F to +104 °F)
Ambient temperature
Medium temperature+5 °C to + 30 °C (+41 °F to +86 °F) (probe)
Equipment properties
Protection typein accordance with IP 54 (Control unit)
Outputs
Connection tube:–20 °C to +40 °C (–4 °F to +104 °F)
(Without additional insulation; in the event of low external temperatures, correct operation can
only be guaranteed with additional insulation. More information available on request)
Fault indication contact, potential-free, 24 V, maximum 1 A
Service interface: RS 232
Power connector230 V AC / 50 Hz
Device with system components : 600 VA
Recommended fuse: 10 A, time-delay
LineHeater offHeater on (–20 °C (–4 °F))
Power consumption
10 m (393.7 in)150 VA250 VA1300 VA
20 m (787.4 in)150 VA350 VA2300 VA
30 m (1181.1 in) 150 VA470 VA3000 VA
Inspection interval: 3 months
Maintenance requirement: Approximately 0.5 h/week, typically
Dimensions:
Earth (approximate)
Open loop control unit: W × H × D 366 × 560 × 212 mm (14.4 × 22 × 8.3 in
Probe: Ø × L 133 × 404 mm (5.2 × 15.9 in
Control unit: 12 kg
Sampling probe 10 m (393.7 in) 7.5 kg
Sampling probe 20 m (787.4 in) 15 kg
Sampling probe 30 m
(1181.1 in)
Mounting poles: 10 kg
Continuous
operation
22 kg
At startup
5
Specifications
6
Section 2General Information
2.1Safety information
Please read this entire manual before unpacking, setting up, or operating this equipment.
Pay attention to all danger and caution statements. Failure to do so could result in serious
injury to the operator or damage to the equipment.
To prevent damage to or impairment of the device's protection equipment, the device may
only be used or installed as described in this manual.
2.1.1Use of hazard information
DANGER
Indicates a potentially or imminently hazardous situation that, if not avoided, can result in death or
serious injury.
WARNING
Indicates a potentially or imminently dangerous situation that, if it is not avoided, can lead to
death or to serious injuries.
CAUTION
Indicates a possible dangerous situation that can have minor or moderate injuries as the result.
Indicates a situation that, if it is not avoided, can lead to damage to the device. Information that
requires special emphasis.
Note: Information that supplements points in the main text.
2.1.2Precautionary labels
Observe all labels and notices attached to the instrument and/or delivery packaging.
Personal injury or damage to the instrument could occur if not observed.
This symbol, if noted on the instrument, references the instruction manual for operation and/or safety
information.
This symbol may be found on an enclosure or barrier within the product and indicates a risk of electric shock
and/or death by electrocution.
Electrical equipment marked with this symbol may not be disposed of in European domestic or public disposal
systems after 12 August 2005. In conformity with European local and national regulations (EU Directive
2002/96/EC), European electrical equipment users must now return old or end-of life equipment to the
manufacturer for disposal at no charge to the user.
Note: Y
were supplied or manufactured by Hach-Lange at your relevant Hach-Lange sales office.
ou obtain instructions on the correct disposal of all (marked and not marked) electrical products that
NOTICE
18-32 kg (39.7-70.5 lbs)
When carrying or transporting the instrument/instrument components and if the total weight is more than 18 kg,
make sure that suitable lifting equipment is used and/or that the instrument/instrument components are carried
by 2 people.
7
General Information
2.2Application areas
Automatic sample removal and homogenization system for supplying the PHOSPHAX S
sigma (total phosphorus), TOCTAX (total organic carbon, TOC) and astro TOC (total
organic carbon, TOC) process photometers with samples from water containing solid
particles with a diameter < 0.5 mm.
Any use other than use in accordance with requirements defined in the user manual leads to the
loss of the warranty claims and can lead to personal injury and property damage, for which the
manufacturer assumes no liability.
2.3Functional description
A sampling probe is immersed in the water and draws only the sample volume required for
the analysis without coming into contact with pumps. The sample is conveyed into a small
storage vessel in the open loop control unit and is homogenized using an ultrasound
generator.
NOTICE
8
2.4Instrument design
Figure 1 Control unit
General Information
1Sample storage vessel5Pressure sensor line 9Overflow drain tube
Only qualified experts may conduct the tasks described in this section.
Select a suitable attachment point for the instrument.
Plan out the mechanical mount·before po
has a sufficient bearing capacity. The dowels must be selected and authorized according to the
condition of the wall.
The manufacturer shall accept no liability if
Plan how to lay cables and tubes and their path in advance. Lay the tubes, data cables and
r cables without any bends and so they do not pose a tripping risk.
powe
Do not connect the electrical supply to the mains·u
protected against short circuits.
Sufficiently protect the electrical powe
For the external power supply, always connect a re
max.: 30 mA) between the mains and the system.
If the instrument is to be installed outdoors, conn
system.
Products intended by the manufacturer for outdoor use
the penetration of liquids and dust. If these products are connected to a mains outlet with a cable
and plug·rather than a permanently connected cable, the plug and outlet are much more
susceptible to liquid and dust penetration. The operator must sufficiently protect the plug and
outlet against liquid and dust penetration in accordance with local safety regulations. If the
instrument is to be used outdoors, it must be connected to a suitable outlet with a protection type
of at least IP44 (splash protection).
DANGER
DANGER
sitioning poles or drilling holes. Make sure the mount
the instrument is installed incorrectly.
ntil the instrument is completely wired and
r supply against short circuits.
sidual-current circuit breaker·(trip current
ect a surge arrester between the mains and the
offer a higher level of protection against
WARNING
Electrical and fire hazards. Only use the mains cable supplied. Only qualified experts may
perform the tasks described in this section of the manual, while adhering to all locally valid safety
regulations.
NOTICE
Protect the instrument from extreme temperatures from heaters, direct sunlight and other heat
sources.
CAUTION
Beware of the weight (open loop control unit: approximately 12 kg; sampling probe up to
approximately 22 kg) of the instrument and the probe. Do not
probe without assistance. Use only suitable lifting devices for the transport.
attempt to carry the instrument and
11
Installation
3.1Mechanical installation
Figure 3 Dimensions (in mm)
1Suspension points 3Wood screw, 5 x 40 (3×)
ixing point4Nylon plug, 8 x 40 (3×)
2F
12
Figure 4 Installation overview
aaaaaaaa
aaaaaaaaaaa
aaa
Installation
1SIGMATAX 2 open loop control unit 4Mounting attachment 7SIGMATAX 2 sampling probe
onnection tube (10–30 m)5Base 8Direction of flow
2C
etaining clamp 6Mounting pipe, 2 m (78.7 in)
3R
13
Installation
3.1.1Install the sampling probe
Installation with rim mounting LZX414.00.00000
Figure 5
Base and mounting attachment
1Express anchor 3Mounting attachment
2Base4Cyl
14
inder-head screw, M8 × 40 (4×)
When carrying out an installation variant that deviates from this example, make sure that the
connection tube from the sampling probe is guided vertically upward for at least 0.5 m (19.6 in).
Installation using pole mount LZX414.00.00000
Figure 6 Sampling probe and mounting pipe
Installation
NOTICE
1Mounting pipe, 2 m (78.7 in)3Retaining clamp
2EPDM flat
seal4Cylinder-head screw, M5 × 20 (3×)
15
Installation
3.1.2Second mounting point and extension pipe
Figure 7 Second mounting point LZX456
1Mounting pipe, 2 m (78.7 in)3Retaining clamp
2EPDM flat
16
seal4Cylinder-head screw, M5 × 20 (3×)
When carrying out an installation variant that deviates from this example, make sure that the
connection tube from the sampling probe is guided vertically upward for at least 0.5 m (19.6 in).
Figure 8 Installation with extension pipe.
Installation
NOTICE
1Mounting pipe, 2 m (78.7 in)4Retaining clamp
2EPDM flat
3Extensi
seal5Cylinder-head screw, M5 × 20 (3×)
on pipe
17
Installation
3.1.3Install the open loop control unit
Install the open loop control unit in a dry location out of direct sunlight.
Make sure that an area of 5 cm is kept free around the entire instrument to enable air to
circulate (distance from the wall of the building, cable channel etc.).
The Teflon sample lines must be laid without sharp bends. Shortening or extending the lines will
lead to problems when the samples are transported.
Each process instrument must have a separate drain tube!
The individual device drains may only be combined in a larger drain pipe with regular water
ghput.
throu
NOTICE
NOTICE
18
Installation
Figure 9
Open loop control unit and process instrument
1SIGMATAX 2 open loop control unit 5Separate drain pipe for process
The pipe trace heater in the connection tube is operated at 230 V. If any damage occurs to the
tube casing, the entire system must be taken out of operation immediately.
Figure 10 Connection tube
DANGER
1Protective tube 3Connection tube
eat-shrink tube 4PG 16 screw connection
2H
20
3.1.5Connect the connection tube
Installation
Figure 11
Connections for connection tube and drain tubes
1Air hose (drain valve), Ø 3 mm
(0.11 in)
2Air hose, Ø 5 mm (0.19 in)5Conn
3Sa
mple tube 6Drain tube for storage vessel
4Electrical connection cable for the
pipe trace heater
ection tube from the sampling
probe
7Overflow drain tube
8Drain fitting
21
Installation
3.2Electrical installation
Protect the instrument from extreme temperatures from heaters, direct sunlight and other heat
sources.
Electrical and fire hazards. Use only the supplied power cable.
Only qualified experts may perform the tasks described
adhering to all locally valid safety regulations.
Use only earthed sockets for the connection of this device to the power supply.
If you are not sure if the sockets are earthed,
The power plug serves in addition to the power
mains where necessary.
The entire measurement system has two power plugs (
control unit).
During the disconnection from the power source it must b
is pulled (for example by labeling the sockets).
This is recommended for long-term storage and can preve
fault.
Therefore make sure that the sockets to which the de
user at all times.
NOTICE
WARNING
in this section of the manual, while
NOTICE
have this checked by a qualified electrician.
supply to isolate the device quickly from the
measurement device and open loop
e made sure that the correct power plug
nt potential dangers in the event of a
vice is connected are easy to reach by each
NOTICE
Pull out power plug before the opening of the device.
3.2.1Connect the pipe trace heater and fault indication contact
WARNING
The electrical connection for the pipe trace heater must be carried out by a specialist electrician.
NOTICE
If the mains plug·of the power connection cable·is removed and replaced by hard wiring, then in
immediate proximity of the display unit a suitable double-pole one-way circuit breaker with clear
labeling for the power supply must be installed.
All connected signal connection lines must be shielded.
22
Figure 12 Terminal assignment
Installation
1Connection cable for pipe trace heater 3Connection terminals for heater
Route the signal lines (1, 2, 3) separated from the power cable.
23
Installation
3.2.2Connect the fiber optic cable
Figure 13 Fiber optic cable connection
1Fiber optic cable for SIGMATAX 2 with PG screw
connection
2Blin
d plug for fiber optic cable PG screw connection
(PHOSPHAX sigma or TOCTAX)
3.3Internal tubing
1. Carefully screw the level indicator tube (1) and O-ring (2) into the cover (3) from
below.
2. Co
3. Lubricate the rubber seal of the ultrasound transducer (9) with Baysilone paste.
4. Att
5. Co
nnect the sampling line (5) to the sampling pipe (4). Then insert the sampling pipe
all the way into the cover through opening 3 or 4.
Note: Fragile glass components
ach the ultrasound transducer (9) to the sample storage vessel using the two
cross-head screws (10). Install the ultrasound transducer in line with the illustration
(cable "upward").
nnect the pressure sensor line (7) and insert the sample delivery line (8) 1 cm
(0.39 in) through the central opening in the cover.
After the sampling probe and control unit have been fully installed and all lines have been
connected (connection tube, sampling and drain tubes, fiber optic cables), the mains plug
can be plugged in.
If there is a risk of freezing, switch on the pipe trace heater!
The pipe trace heater in the connection tube is operated at 230 V. If any damage occurs to the
tube casing, the entire system must be taken out of operation immediately.
Figure 15 Plug in the power plug
WARNING
27
Start Up
28
Section 5Operation
5.1Operation
All instrument functions are controlled by the software. The instrument is operated via
menus using four keys that are located below the display. From operational mode, you can
access the first menu level by pressing the function keys, F1 to F4, for 3 seconds.
The functions of the keys in the individual menus may vary, and are therefore shown
(abbreviated clearly) in the second row of the display (softkey function).
Figure 16 Display and keypad
1Time remaining for current process4Operational status of heater
("H" visible = heater active)
2C
urrent status message5Cancel 8Go to next menu item
3Ope
rational status of ultrasound
("U" visible = ultrasound active)
6Setting change
7Go back to previous menu item
29
Operation
5.2
+SETTINGS
for parameterizing the
instrument
+OUTPUT TEST
for testing
connected
data cables
Menu overview
Menu level 1Menu level 2Menu level 3Description
Language Option to select the language for the menus
HEATER Self-adjusting pipe trace heater —
turn on if there is a risk of freezing!
Interval
Probe type
Contrast
press. indic.
Version Instrument type and program version
error indication
fiber optic 1
Time interval (6–60 minutes) between
2 samples.
An interval > 12 minutes is only necessary for
onger analysis periods
l
Length of connection tube (10–30 m
(393.7–1181.1 in)
Reading angle (0–30) of the display;
tempe
rature dependent
Pressure display on the screen; can be
switched off
Switches on the potential-free fault indication
contact for 2 seconds
The fault indication contact
the previous position for as long as the
user activates it for testing purposes.
Blanks fiber optic cable 1 for 1 second
is only held in
OF output 2
ERVICEMENU
+S
for maintenance tasks
d functional tests
an
fiber optic 2
+INSPECTION:
SIGMATAX switches to
service mode
+FUNCTIONSTEST
SIGMATAX switches
to service
mode
+ERROR STATUS
Blanks fiber optic cable 2 for 1 second
clean.samp. tube
cleaning probe
blowing probe
blowing valveAutomatically cleans the drain valve with air
compressor Activates compressor for 30 seconds
probe valve
ultrasonic
drain valve
filling errorCounter for filling errors that have occurred
delivery error Counter for delivery errors that have occurred
error reset Reset the counters to "0"
Cleans the sample tube (assisted by the
ogram)
pr
Cleans the sampling probe (assisted by the
ogram)
pr
Automatically cleans the sampling probe with
ai
r
Automatically open and close the
probe valve
Takes a new sample and
ultrasound for 30 seconds
Automatically opens and closes the drain
valve
activates
30
5.3Important instrument settings
5.3.1Switch on the heater
1. Press one of the function keys, F1 to F4, for 3 seconds.
Operation
2. Open
3. Pr
4. Se
5. Swit
6. Con
the +SETTINGS menu by pressing F2.
ess F4 to scroll to the [heating] menu item
lect this menu item by pressing F2.
ch the heater on or off by pressing F3 or F4.
firm by pressing F2 and exit this menu level by pressing F1.
5.3.2Set the processing interval
1. Press one of the function keys, F1 to F4, for 3 seconds.
2. Open
3. Press
4. Se
5. Set th
6. Con
the +SETTINGS menu by pressing F2.
F4 twice to scroll to the [interval] menu item.
lect this menu item by pressing F2.
e desired interval by pressing F3 and F4.
firm by pressing F2 and exit this menu level by pressing F1.
5.3.3Set the display contrast
1. Press one of the function keys, F1 to F4, for 3 seconds.
2. Open
3. Press
the +SETTINGS menu by pressing F2.
F4 four times to scroll to the [contrast] menu item.
4. Se
5. Set th
6. Con
lect this menu item by pressing F2.
e desired contrast by pressing F3 and F4.
firm by pressing F2 and exit this menu level by pressing F1.
5.3.4Switch on the pressure display
1. Press one of the function keys, F1 to F4, for 3 seconds.
2. Open
3. Press
4. Se
5. Swit
6. Con
STATUS UO
Open the probe0 to minimum –0.5 bar–
Close the probe 0 to minimum 1.3 bar–
Deliver the sample> 1.6 bar 10–16
Empty the probe0.1–0.5 bar–
the +SETTINGS menu by pressing F2.
F4 five times to scroll to the [press indic.] menu item.
lect this menu item by pressing F2.
ch the pressure indicator on or off by pressing F3 or F4.
firm by pressing F2 and exit this menu level by pressing F1.
31
Operation
5.3.5Access service mode
1. Press one of the function keys, F1 to F4, for 3 seconds.
2. Press F4 twice to scroll to the [+SERVICEMENU] menu.
3. Press F2 to open this menu.
4. When the [+INSPECTION] or [+FUNCTION TEST] menus are selected, the system
automatically switches to service mode.
Service mode means that:
•The instrument is no longer in operational mode
•The sampling probe and sample storage vessel are empty
•The system is depressurized
•The sampling probe is closed
•The fault indication contact remains in the last valid position
•The instrument will not switch back automatically to operational mode
32
Section 6Maintenance
The manufacturer recommends that an inspection contract be concluded. This contract
extends the warranty period to 5 years and makes sure that all inspection and
maintenance tasks are carried out by qualified experts.
Maintenance tasks for users are limited to regular visual inspections and, if necessary,
cleaning procedures.
Maintenance scheduleDOC273.72.04008.MRZ03
Type of
device:
Commissioning on:by:
◦ 10 m◦ 20 m◦ 30 mInstrument number:
Annually:
Seal membrane on relief valve
Every 1.5 years:
Replace compressor
Every 3 months:
Clean supply lines and
ng probe (interior)
sampli
Test pressure
Every 6 months:
Replace valve piston with seal
kit
Heat if there is a risk of
freezing!
Weekly:
Clean sample storage vessel
Visually inspect sample quality
Every 1–4 weeks:
Check/clean sampling probe
Clean sample tube
(semi-au
tomatic)
33
Maintenance
6.1Maintenance tasks
6.1.1After 1–4 weeks (as necessary)
Potential dangers with contact with chemical/biological substances.
Working with chemical samples, standards and reagents is linked with dangers.
Make yourself familiar with the necessary safe
chemicals before the work and read and follow all relevant safety data sheets.
Before handling these substances observe all danger notes and safety information printed on the
containers of the original solutions and in the safety data sheet.
Dispose of all consumed solutions in accordan
Select the type of protective equipment suitable to the concentration and quantity of the
dangerous material being used.
Clean the sample tube
DANGER
ty procedures and the correct handling of the
WARNING
ce with the national regulations and laws.
1. In the [+SER
VICEMENU] menu, open the [+INSPECTION] submenu and the
[clean.samp. tube]menu item.
2. The
individual steps are specified here and carried out with the support of the
program (see table).
Display text Description/action
clean. samp. tubeBegin the cleaning tasks supported by the
by pressing F4
clean. samp. tubeConfirmation prompt; confirm by pressing F4
cleaning glass inserted?Replace the sample storage vessel with the
chlorine bleach (sodium hypochlorite), and confirm by pressing F4.
sample tube advanced?Feed the sample tube through to the base of the cleaning vessel and confirm
ressing F4.
by p
opening probe cleaning
emptying probe cleaning
affecting
tube xx sec
please wait xx sec
sample glass inserted?Insert the sample storage vessel again and confirm by pressing F4
sample tube retractedRetract the sample tube and confirm by pressing F4
from cleaning toAt this point, it is possible to choose whether SIGMATAX calls up the
meantime, the sample storage vessel can be cleaned using a paper towel
and, if necessary, a little window cleaning solution or diluted hydrochloric
acid.
SERVICEMENU] menu and remains in SERVICE mode, or whether it
[+
switches to operational mode.
The program runs through an automatic rinsing function to remove the
esidual cleaning solution by repeatedly filling and emptying the system.
r
program for the sample tube; start
cleaning vessel, which contains
for 60 seconds. In the
34
6.1.21×/month (or as necessary)
Potential dangers with contact with chemical/biological substances.
Working with chemical samples, standards and rea
Make yourself familiar with the necessary safety procedures and the correct handling of the
chemicals before the work and read and follow all relevant safety data sheets.
Before handling these substances observe all danger notes and safety information printed on the
containers of the original solutions and in the safety data sheet.
Dispose of all consumed solutions in accordance with the national regulations and laws.
Select the type of protective equipment suitabl
dangerous material being used.
Clean the sampling probe
Maintenance
DANGER
gents is linked with dangers.
WARNING
e to the concentration and quantity of the
1. In the [+SER
VICEMENU] menu, open the [+INSPECTION] submenu and the
[cleaning probe] menu item.
2. Th
e individual steps are specified here and carried out with the support of the
program (see table).
Display text Description/action
cleaning probeBegin the cleaning tasks supported by the program
start by pressing F4
cleaning probeConfirmation prompt; confirm by pressing F4
probe in clean.solution?Immerse the sampling probe in a bucket containing cleaning solution (rinsing
The sampling probe is automatically filled with cleaning solution.
You can assist the cleaning process mechanically. To do this, simply shake
the prob
The sampling probe empties automatically and rinses the removed solids out
in
pressin
[+SERVICEMENU] menu and remains in SERVICE mode, or whether it
switches to operational mode.
The program runs through an automatic rinsin
the system to remove the residual cleaning solution.
e and confirm by pressing F4
to the bucket with the cleaning solution.
g F4
se whether SIGMATAX calls up the
for the sampling probe;
g function, filling and emptying
35
Maintenance
36
Section 7Troubleshooting
As soon as a fault leads to an interruption in operation, SIGMATAX 2 immediately
switches to service mode. Corresponding error messages are shown both on the
SIGMATAX 2 display and on the displays of the connected process photometers.
e sampling probe and sample storage vessel are empty
e system is depressurized
e sampling probe is closed
e fault indication contact is held in the last valid position
not return automatically to operational mode
Select [clean.samp. tube]and carry
necessary, blow air through the sample line using the
compressor. Inspect the upper level indication sensor.
Check the compressor in the [
menu
Remove probe, extract blockages and inspect the
valve and drain valve.
probe
out a full clean; if
+FUNCTIONTEST]
37
Troubleshooting
38
Section 8Replacement parts and accessories
8.1Product contents
DescriptionCat. No
Control unitLXV215
10 m (393.7 in) connection tube + sampling probe
20 m (787.4 in) connection tube + sampling probeLXV232
30 m (1181.1 in) connection tube + sampling probe
Storage vesselLZX394
Drain fitting
Maintenance scheduleHDF 167
Cleaning vessel
2× drain tube 2 m (78.7 in)LZX278
Screw set
Lid for sample storage vessel with level indicator pipe
Sampling pipe
PG 16 screw connection
Works test certificate
User manual
LXV231
LXV282
LZX389
LZX397
LZX355
8.2Further accessories
DescriptionCat. No
Pole mount for the probeLZX414.00.00000
User manual
Second mounting point (for vibrations)LZX456
BDA361
8.3Replacement and wear parts
DescriptionCat. No
230 V membrane compressor (for approximately 1,5 years)LZX376
Sample storage vessel
Valve pistonLZX267
Wear part set for probe valve (for approximately 6 months)
Complete drain valveLZX266
Complete air filter
Air filter without fittings (for approximately 12 months)LZX299
Sample storage vessel lid
Accessory set for lid of sample container vesselLZX385
Maintenance schedule
Sampling nozzle (inside the probe)LZX271
Filter for air outlet
Level indicator pipe with O-ringLZX386
Complete probe valve
Straight sampling pipeLZX305
Bent sampling pipe
Sampling vessel (probe body)LZX294
Sample tubes 1.5 m (59 in) and 2 m (78.7 in)
Cleaning vesselLZX397
LZX394
LZX306
LZX300
LZX381
HDF167
LZX295
LZX269
LZX293
LZX275
39
Replacement parts and accessories
8.3Replacement and wear parts
DescriptionCat. No
Probe line 10 m (393.7 in) LZX393
Probe line 20 m (787.4 in) LZX398
Probe line 30 m (1181.1 in) LZX411
Bottom overflow fittingLZX388
Complete ultrasound transducerLZX284
40
Section 9Warranty and liability
The manufacturer warrants that the product supplied is free of material and manufacturing
defects and undertakes the obligation to repair or replace any defective parts at zero cost.
The warranty period for instruments is 24 months. If a service contract is taken out within
6 months of purchase, the warranty period is extended to 60 months.
With the exclusion of the further claims, the supplier is liable for defects including the lack
of assured properties as follows: all those parts that, within the warranty period calculated
from the day of the transfer of risk, can be demonstrated to have become unusable or that
can only be used with significant limitations due to a situation present prior to the transfer
of risk, in particular due to incorrect design, poor materials or inadequate finish will be
improved or replaced, at the supplier's discretion. The identification of such defects must
be notified to the supplier in writing without delay, however at the latest 7 days after the
identification of the fault. If the customer fails to notify the supplier, the product is
considered approved despite the defect. Further liability for any direct or indirect damages
is not accepted.
If instrument-specific maintenance and servicing work defined by the supplier is to be
performed within the warranty period by the customer (maintenance) or by the supplier
(servicing) and these requirements are not met, claims for damages due to the failure to
comply with the requirements are rendered void.
Any further claims, in particular claims for consequential damages cannot be made.
Consumables and damage caused by improper handling, poor installation or incorrect use
are excluded from this clause.
The manufacturer process instruments are of proven reliability in many applications and
are therefore often used in automatic control loops to provide the most economical
possible operation of the related process.
To avoid or limit consequential damage, it is therefore recommended to design the control
loop such that a malfunction in an instrument results in an automatic change over to the
backup control system; this is the safest operating state for the environment and the
process.