EMD Aquastar AQV21 Service manual

Volumetric Titrator
AQUASTAR®AQV21
Installation Information

Table of contents
Volumetric Titrator 3
Table of contents
1 Introduction 5
2 Measures for your protection 6
3 Standard equipment 7
4 The titrator 10
4.1 Titrator conguration 10
4.2 Titrator rear panel connections 11
4.3 Openings on the titration vessel 11
5 Installation (components) 13
5.1 Connecting the power supply 13
5.2 Titration stand 14
5.2.1 Installing the titration stand 14
5.2.2 Installing the solvent bottle 15
5.2.3 Installing the waste bottle 16
5.2.4 Connecting the measuring electrode 17
5.3 Inserting a burette 17
5.4 Internal magnetic stirrer 17
6 Optional accessories 18
7 Technical data 24
7.1 Titrator 24
7.2 Supported devices (periphery) 27
8 Service and maintenance 29
8.1 Cleaning 29
8.2 Transporting the titrator 29
9 Declaration of system validation 30
10 Product life cycle model 31

1 Introduction
Simple and compact
The AQUASTAR® Compact Titrators are modern, titrators for use in a wide variety of application areas.
They can be used, for example, in quality control as well as in research and development and satisfy the
most demanding of requirements.
The AQUASTAR® titrators perfectly combine simple, easy-to-understand operation with an extremely high
lev el of precision and outstanding reliability. Thanks to automatic titrant recognition (Plug & Play bu-
rettes), the titrator independently identies which titrant is required without intervention from the oper a tor.
Settings no longer need to be adjusted manually, even when connecting a printer.
The instruments can either be controlled by Touchscreen or by using LabX PC software. The large color
Touch screen allows intuitive control by the user and exibility in its adjustment options. All functions can
be activated directly from the Homescreen via Shortcuts which can be freely created, making everyday
use extremely easier. Controlling the titrator by Touchscreen and all adjustable parameters are described
sep a rate ly and in detail in the operating instructions on the Tutorial CD.
This installation information explains all the steps necessary for installing and commissioning your de-
vice. The "Quick Guide" will then guide you through the rst titration process using a practical exam ple. If
you have any additional questions, EMD is always available to assist you.
Volumetric Titrator 5
Introduction

2 Measures for your protection
The instruments have been tested for the experiments and intended purposes documented in the appro-
pri ate Operating Instructions. However, this does not absolve you from the responsibility of performing
your own tests of the products supplied by us regarding their suitability for the methods and purposes
you intend to use them for. You should therefore observe the following safety measures.
Measures for your protection
Risk of electric
shock
●Only use the power supply unit that was included with the instrument.
●Ensure that you plug the power cable supplied into a receptacle outlet that is
ground ed. In the absence of grounding, a technical fault could be lethal.
Risk of explosion
●Never work in an environment subject to explosion hazards! The housing of
the instrument is not gas tight (explosion hazard due to spark formation, cor-
ro sion caused by the ingress of gases).
Risk of corrosion
●Always test the titration vessel for rm seating in the titration head. If it falls off,
you could injure yourself if working with toxic titrants and solvents or strong
acids or bases.
●When using chemicals and solvents, comply with the instructions of the pro-
duc er and the general lab safety rules!
All Karl Fischer reagents are readily ammable and toxic.
●In the case of skin contact, immediately wash off with copious amounts of wa-
ter!
●If eye contact occurs, rinse intensively with copious amounts of water and
con sult a physician!
Measures for your operational safety
Caution
●Have the instrument serviced only by METTLER TOLEDO Service!
●Any spillage should be wiped off immediately! Some solvents might cause cor-
ro sion of the housing.
●Exclude the following environmental inuences:
•Powerful vibrations,
•direct sunlight,
•atmospheric humidity greater than 80%,
•temperatures below 5 °C and above 40 °C,
•powerful electric or magnetic elds!
Volumetric Titrator6
Measures for your protection

3 Standard equipment
All parts are specied with their ordering code and quantity in cases where more than one part is includ-
ed. When ordering, some parts are only available in a minimum order quantity. In such cases, the cor re-
spond ing minimum order quantity is quoted. The standard equipment and optional accessories are listed
in the appropriate operating instructions.
Description Order number
Karl Fischer titrator -
Separate power supply (100 – 240 Volt) 51105795
Power cable (country-specic) -
Protective cover for touchscreen 51105567
Threaded ring 51107459
Cover with:
●Three hole adapter (23982) incl. NS 10, NS 7.5 and
pin hole stopper
●NS 7.5 stopper (23452) (minimum order quantity 5
pcs.)
●Connecting piece (23957)
51107462
O-ring 51190366
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Standard equipment

Titration vessel 51107463
Fastening screw (for measuring cell) 51107474
Magnetic stirrer bar 51191159
5 ml interchangeable burette set DV1005
Silicone tube
133 mm
51107480
Drying tube holder 23915
3 Drying tube with cover 23961
Seal (titration stand drying tube) 51107492
Volumetric Titrator8
Standard equipment

Solvent Manager set with:
●Silicone tube 850 mm (51105581)
●Silicone tube 170 mm
●Drying tube with cover (23961)
●2 at seals (23981) (minimum order quantity 5 pcs)
51105600
Brown glass bottle
1 l
71296
2 Flat seals (minimum order quantity 5 pcs.) 23981
Screw top (for bottles) 23937
2 Draining tube / Dispensing tube 51107481
Adapter for immediate draining 51105594
Dual platinum pin electrode
DM143-SC
51109299
Triaxial SC LEMO cable
72 cm
89601
Molecular sieve
250 g
71478
Volumetric Titrator 9
Standard equipment

4 The titrator
4.1 Titrator conguration
Part Description
A Titrant bottle drying tube
BSolvent bottle drying tube
CWaste bottle drying tube
D Solvent manager
EWaste bottle
F Solvent bottle
GTitration arm
H Titration beaker
IInternal magnetic stirrer
JOn/Off button
K Indicator light (LED)
L Touchscreen
M Burette drive
nBurette arrestment knob
oBurette 5 mL
Volumetric Titrator10
The titrator

Part Description
pDrying tube for the titration beaker
Q Double platinum pin electrode
RTitrant bottle
4.2 Titrator rear panel connections
Socket Use Example
STIRRER PUMP Stirrer / pump Solvent manager/stirrer
SENSOR Measuring electrode DM143-SC
TTL-I/O
POWER SUPPLY Power supply Power supply
COM Balance XS analytical balance
ETHERNET Network Link to LabX PC software via network
PC PC connection via USB Link to LabX PC software via USB
interface
USB1 Printer / barcode reader / memory
stick / USB hub
USB-P25 compact printer
USB2 Printer / barcode reader / memory
stick / USB hub
Barcode reader
CAN OUT CAN connection For service use
4.3 Openings on the titration vessel
The titration vessel lid is normally connected as illustrated.
Volumetric Titrator 11
The titrator

Part Connection
A Solvent bottle dispensing tube
BBurette dispensing tube
CMeasuring electrode
DStopper
E Silicone tube of drying tube
F Waste bottle draining tube
G Three hole adapter
Volumetric Titrator12
The titrator

5 Installation (components)
Installation for all titrator types is described in this chapter. Standard equipment for the various types of
titra tors varies and also depends on the optional accessories. For this reason, installation steps may
vary.
5.1 Connecting the power supply
The titrator is operated by a separate power supply. The On/Off switch is tted with an LED and mounted
on the front of the titrator. The LED displays the operating status. The titrator is switched on by pressing
the On/Off button. The LED ashes as the system starts up and then remains permanently lit. The titrator
is switched off by pressing the On/Off button again. All current tasks are interrupted and the LED starts to
ash until the system has shut down, which can take up to 60 seconds. The LED then goes out.
a) Connect the power supply unit to the "POWER SUPPLY" socket on the rear of the titrator and to the
mains supply.
b) Secure the connection at the titrator by screwing the plug connector rmly into place.
The power supply is suitable for all supply voltages ranging from 100–240 VAC ±10% and 50–60 Hz.
Volumetric Titrator 13
Installation (components)

5.2 Titration stand
5.2.1 Installing the titration stand
When delivered, the titration vessel is already assembled
com plete with O-ring, lid and threaded ring. The seal is se-
cured in the titration stand. If you wish to change the lid or re-
place the O-ring, the illustration can be used as a guide. The
titration arm can be pivoted in both directions.
a) Carefully slide the magnetic stirring rod supplied into the
titra tion vessel.
b) Place the titration vessel in position by inserting the lobe
on the threaded ring into the center groove of the titration
arm and then pressing down onto the magnetic stirrer.
Tight en the fastening screw.
c) Place the three hole adapter, NS stopper and connecting
piece into the lid openings.
d) Fill a drying tube tted with a molecular sieve, close with
the lid and press into the titration stand so that leak tight-
ness is ensured. Use the silicone tube to connect the lid
to the connecting piece.
Part Description
aSilicone tube (133 mm)
BThreaded ring
CLid
D Connecting piece
ENS 7.5 stopper
F Three hole adapter
G O-ring
H Titration vessel
ILid
JFastening screw
K Drying tube
L Groove in the titration arm
MTitration arm
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Installation (components)

5.2.2 Installing the solvent bottle
a) Open the solvent bottle, place the at seal in position
and screw on the screw top.
b) Loosen the threaded sleeve on the screw top, push the
dis pens ing tube through the screw top and down to the
bot tom of the bottle and tighten the threaded sleeve. (An
O-ring is located in the bushing to guarantee leak tight-
ness.)
c) Screw the other end of the dispensing tube with the
adjust ing sleeve into the left-hand opening of the three
hole adapter, at the titration stand.
d) Fill a drying tube tted with a molecular sieve and press
into the screw top of the bottle.
Part Description
A Drying tube
BThreaded sleeve
CScrew top
D Flat seal
E Dispensing tube
F Adjusting sleeve
G Teon seal
Check all drying tubes and closing points once again for rm seating in order to ensure that the system
is leaktight.
Volumetric Titrator 15
Installation (components)

5.2.3 Installing the waste bottle
a) Place the at seal in position and screw the solvent man-
ag er onto the waste bottle.
b) Loosen the threaded sleeve on the Solvent Manager,
push in the extraction tube so that it is just below the
screw top and tighten the threaded sleeve. (An O-ring is
locat ed in the bushing to guarantee leaktightness.)
c) Push the adjusting sleeve and teon ring back a little on
the other end of the extraction tube. Take the adapter for
imme di ate draining and carefully insert it into the drain-
ing tube. (The instrument can also be operated with-
out this adapter. When emptying the titration beaker, you
must push the draining tube to the bottom of the con tain-
er in this case.)
d) Screw the draining tube into the right-hand opening of
the three hole adapter and adjust the height so that the
adapter just touches the bottom of the titration beaker.
e) Fill a drying tube tted with a molecular sieve and press
into the appropriate opening of the solvent manager.
f) Using the silicone tube (170 mm), connect the drying
tube to the appropriate connection on the Solvent Man-
ag er.
g) Using the silicone tube (850 mm), connect the drying
tube of the solvent bottle to the appropriate adapter of the
Sol vent Manager. The silicone tube can be shortened to
any length, if required, using a pair a scissors.
h) Connect the cable of the Solvent Manager to the "STIR-
RER/PUMP" socket on the rear of the titrator.
Part Description
A Draining tube
BSilicone tube (170 mm)
CThreaded sleeve
D Drying tube
E Solvent Manager
F Connecting cable
G Silicone tube (850 mm)
H Flat seal
IAdjusting sleeve
JTeon seal
K Adapter for immediate draining
●Do not use the adapter for immediate draining in connection with samples which cannot be fully dis-
solved. Risk of blockage.
●Do not use the adapter for immediate draining in connection with a homogenizer. This could destroy
the adapter.
●Check all drying tubes and closing points once again for rm seating in order to ensure that the sys-
tem is leaktight.
Volumetric Titrator16
Installation (components)

5.2.4 Connecting the measuring electrode
a) Place the measuring electrode into the appropriate opening of the cell
b) Using the triaxial cable, connect the measuring electrode to the "SENSOR" socket on the rear of the
titrator.
5.3 Inserting a burette
Current generation burettes are tted with a RFID transponder chip on the holder (can be recognized by
the small cover C, represented in black). This chip is used for reading and writing properties such as
titrate name, concentration or usable life.
a) Install the burette with holder on the titrant bottle (see bu-
rette operating instructions).
b) Turn the arrestment knob in the opposite direction to the
arrow.
c) Take the burette from the holder and push it onto the
titra tor from the left hand-side, as illustrated:
The recesses on the driver arm Amust be parallel to
the slide-on part of the burette.
The piston rod B must be in the home position.
d) Turn the arrestment knob in the direction of the arrow to
secure the burette.
e) Insert the dispensing tube into the next available opening
in the titration stand D, which is located coun ter clock-
wise from the electrode E.
When rinsing burettes and tubes, place the tips of dispensing tubes into a waste container.
5.4 Internal magnetic stirrer
A magnetic stirrer is standard on all models and tted at the top of the housing, underneath the pivoted
titra tion arm. Both On/Off switching and the stirrer speed are controlled by the software.
Volumetric Titrator 17
Installation (components)

6 Optional accessories
All parts are specied with their ordering code and quantity in cases where more than one part is includ-
ed. When ordering, some parts are only available in a minimum order quantity. In such cases, the cor re-
spond ing minimum order quantity is quoted. The standard equipment and optional accessories are listed
in the appropriate operating instructions.
Description Order number
Titration software
●LabX light titration
●LabX pro titration
●Instrument licenses for titrators
LabX
Threaded ring 51107459
Cover with:
●Three hole adapter (23982) incl. NS 10, NS 7.5 and
pin hole stopper
●NS 7.5 stopper (23452) (minimum order quantity 5
pcs.)
●Connecting piece (23957)
51107462
O-ring 51190366
Stopper for three hole adapter
(1 set: 1 NS 10, 1 NS 7.5, 6 pin hole stopper)
25883
Septum stopper (10 pcs.)
NS 10
NS 24
23949
23950
Titration vessel 51107463
Volumetric Titrator18
Optional accessories

Tempering beaker 51107497
Fastening screw (for measuring cell) 51107474
Magnetic stirrer bar 51191159
Solvent Manager set with:
●Silicone tube 850 mm (51105581)
●Silicone tube 170 mm
●Drying tube with cover (23961)
●2 at seals (23981) (minimum order quantity 5 pcs)
51105600
Silicone tube (pressure tube to solvent manager)
850 mm
51105581
Silicone tube
170 mm
51105578
Draining tube / Dispensing tube 51107481
Adapter for immediate draining 51105594
Drying tube holder 23915
Volumetric Titrator 19
Optional accessories

Drying tube with cover 23961
Seal (titration stand drying tube) 51107492
Brown glass bottle
1 l
71296
Flat seal (minimum order quantity 5 pcs.) 23981
Screw top (for bottles) 23937
O-ring (4 pcs.)
for screw tops
51107496
Molecular sieve
250 g
71478
Adapter for bottles made by
Merck, Germany
Fisher, USA
23774
23787
Dual platinum pin electrode
DM143-SC
51109299
Volumetric Titrator20
Optional accessories