Metrohm 717 User Manual
CH-9101 Herisau/Switzerland
Tel. +41 71 353 85 85
Fax +41 71 353 89 01
E-Mail sales@metrohm.ch
Internet http://www.metrohm.ch
717 Sample Changer
Instructions for use
8.717.1003
98.03 sn
Table of Contents
Page
1 OVERVIEW ___________________________________________ 1
1.1 Side View _______________________________________ 1
1.2 Rear View _______________________________________ 2
1.3 Sensors _________________________________________ 3
1.4 The Sample Changer Models _______________________ 4
2 INSTALLATION ________________________________________ 5
2.1 Setting up the Instrument __________________________ 5
2.2 Safety Considerations _____________________________ 6
2.3 Arranging the Accessories _________________________ 7
2.3.1 Setting up the Rinsing Equipment .................................7
2.3.2 Tubing Fixation ..............................................................8
2.3.3 Magnetic Stirrers ...........................................................8
2.3.4 Sample Racks ...............................................................9
2.3.5 Mounting and Setting up the Titration Heads ..............10
2.4 Remote Connections _____________________________ 11
2.5 External Bus Connections ________________________ 13
3 SAMPLE RACKS ______________________________________14
4 SWING HEAD ________________________________________ 16
4.1 Prerequisites ___________________________________ 16
4.2 Installing the Swing Head _________________________ 16
4.3 Accessories for the Titration Head _________________ 18
5 APPENDIX __________________________________________ 20
5.1 Technical Specifications __________________________ 20
5.1.1 717 Sample Changer ..................................................20
5.1.2 759 Swing Head ..........................................................22
5.2 Servicing and Maintenance _______________________ 23
5.3.1 Servicing ......................................................................23
5.3.2 Maintenance / Attendance ...........................................23
5.3 Warranty and Conformity _________________________ 24
5.3.1 Warranty ......................................................................24
5.3.2 Certificate of Conformity and System Validation
for the 717 Sample Changer ...............................25
5.3.3 Certificate of Conformity and System Validation
for the 759 Swing Head .......................................27
5.4 Accessories ____________________________________ 29
5.5 Index __________________________________________ 34
1 Overview
1.1 Side View
1.1 Side View
Splash protection
Rack
Guide chain
Lift
Distribution
head
Pump
Valve
Tower
Stirrer rail
717 Sample Changer, Overview
Connectors
Plug cover
Safety note:
Do not operate the 717 Sample Changer without splash protection
and plug cover being mounted. The plug cover prevents any contamination of the connectors, caused by spilled solvents or chemicals.
1
1.2 Rear View
The Connectors (side view):
The remote socket serves the connection of Metrohm- or other
measuring instruments that communicate via a serial cable.
1.2 Rear View
Stirrer
sockets
1 2 3 4
Remote
socket
Remote
Control
Guide chain
Distribution head
Plug cover
Pump 1
Valves
External Bus
Address
0020/02 187
Type 1.717._
Made by Metrohm Herisau Switzerland
Mounting screw
for splash protection
Pump 2
Connectors
2
717 Sample Changer, Overview
1.3 Sensors
The Connectors (rear):
External Bus
External Bus
socket
1.3 Sensors
Beaker test
Splash protection
Beaker indicator
Address
Manufacturing number
External Bus
address selector
Type 1.717._
Made by Metrohm Herisau
0120/02 187
Each tower of the 717 Sample
Changer is equipped with a
beaker indicator to detect the
presence of a beaker in front
of the particular tower. This
infrared sensor detects many
different materials, if any object is placed in correct position.
Rack
Magnet holder
Magnetic indicator
Front view
Magnetic rack code indicator
The magnetic sensor to detect
the individual rack codes is
mounted below the sample
changer's turntable.
The 717 Sample Changer
should be initialized right after
every rack change, because the
magnetic binary code of the
racks can only be read, if the
rack is in initial position and
therefore the magnet holder is
in accurate position right above
the rack code indicator.
717 Sample Changer, Overview
3
1.4 The Sample Changer Models
11.4 .4 The Sample Changer Models
Model 2.717.0010 Model 2.717.0020 Model 2.717.0030
1 tower, 1 pump 1 tower, 2 pumps 1 tower, no pumps
2 stirrer connections 2 stirrer connections 2 stirrer connections
Tower 1
Tower 2
Tower 1
Tower 2
Tower 1
Model 2.717.0110 Model 2.717.0120 Model 2.717.0130
2 towers, 2 pumps 2 towers, 4 pumps 2 towers, no pumps
4 stirrer connections 4 stirrer connections 4 stirrer connections
Tower 2
4
717 Sample Changer, Overview
2 Installation
2.1 Setting up the Instrument
Packaging
The 717 Sample Changer is supplied with the accessories in
separate special packages designed to ensure maximum protection. These contain shock-absorbing foam linings. As only these
special packages guarantee damage-free transport of the instrument, it is essential you store them in a safe place.
Control
Immediately following delivery, check that the consignment is
complete and undamaged (compare with delivery note and accessories list, page 29ff). In case of damage, see "Warranty",
page 24.
2.1 Setting up the Instrument
Setting up
The 717 Sample Changer is a rugged instrument and may be
used in rough environments such as laboratories and manufacturing plants. It must not be exposed to a corrosive atmosphere.
If the sample changer is operated in a rough environment, regular
maintenance is strongly recommended.
717 Sample Changer, Installation
5
2.2 Safety Considerations
2.2 Safety Considerations
If failure or malfunctioning occurs during operation of the
717 Sample Changer, the Metrohm Service Department should be
consulted.
If opening the instrument is unavoidable, the following safety precautions are to be strictly adhered to:
Before opening the instrument disconnect it from all electrical sources. Make sure that all main cables have been disconnected.
Only in exceptional cases should the instrument be opened while it
is switched on. Because parts that conduct current are exposed in
this case, this should only be undertaken by an expert who is acquainted with the associated dangers.
Electronic components are sensitive to static electricity and can be
destroyed by discharge. Before touching any components inside
the instrument, both the person and his tools should be grounded
by grasping a grounded object (for example: a metallic part of the
casing of the instrument or a radiator) in order to eliminate any
static electricity.
When peripheral instruments are connected to the 717 Sample
Changer, the sample changer and the instruments to be connected have to be switched off, otherwise all instruments could
suffer damage.
If it becomes apparent that the instrument can no longer be operated safely, it must be put out of operation.
6
717 Sample Changer, Installation
2.3 Arranging the Accessories
2.3.1 Setting up the Rinsing Equipment
To mount the PTFE tubings to the pump inlets or outlets enlarge it
carefully using a screwdriver, a pen or another appropriate tool. A
piece of sand paper facilitates grasping of the tubing.
The arrangement of the tubing depends on the rinsing equipment.
Rotating nozzle
Using a changer model with one pump per tower only, the rotating
nozzle (6.2740.000) is recommended for rinsing. The Teflon tubing
is then directly connected to the rinsing pump (pump 1). The distribution head may be dismounted in this case.
2.3 Arranging the Accessories
Place the rotating nozzle vertically in the titration head with the aid
of a SGJ14/12 mm sleeve.
Spray nozzles
When using a changer model with two pumps per tower, spray
nozzles (6.2740.020) may be used in combination with an aspiration tip M8 (6.1543.170). Insert the spray nozzles into the sloped
borings of the titration head. Use Teflon tubings to connect them
to the distribution head. Each of the four outlets of the distribution
head must be plugged. Plug unused outlets with an M6 thread
stopper (6.1446.040) to avoid splashing of liquid during rinsing.
Fix the tubings in the guide chain. Chain links may be removed if
necessary (see below).
Insert the aspiration tip vertically into a boring (SGJ9) of the Macro
Titration head. The Micro Titration head offers also a vertical boring for the placement of the aspiration tip. Connect the tip with the
Teflon 4/6 tubing (6.1805.510) and a screw connector 4/6 mm
(6.1820.030) to pump 2 (valve marked with 'ê'). During the rinsing
procedure, first the sample is sucked off then the electrode is
rinsed in the empty vessel.
717 Sample Changer, Installation
7
2.3 Arranging the Accessories
The pump heads of the diaphragm pump, the fittings and the coupling rings are made of PVDF. PVDF is resistant to many chemicals. Acetone, acetanhydride or dimethylformamide (DMF) should
not be used. The diaphragm, and the inner parts of the valves
consist of PTFE and are resistant to most chemicals.
If your samples contain solids (e.g. silver chloride) or sticking substances, you should use the 772 Peristaltic Pump Unit in combination with the 731 Relay Box instead of the diaphragm pump integrated into the changer.
The PE canisters (6.1621.000) are suitable for aqueous solutions.
2.3.2 Tubing Fixation
In order to fix the tubing in
the guide chain any chain link
may be opened with a screw
driver or another appropriate
tool.
2.3.3 Magnetic Stirrers
Rack
Stirrer rail
Magnetic stirrers 2.741.0010
may be placed in any
position on the stirrer rail
beneath the rack.
8
717 Sample Changer, Installation
2.3.4 Sample Racks
Magnet holder
Magnetic sensor
2.3 Arranging the Accessories
After placing the rack on the
turntable, the sample
changer must be initialized to
enable the safe reading of
the magnetic rack code.
This can only be done if rack
position 1 is directed to
tower 1.
717 Sample Changer, Installation
9
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