Metrohm 717 User manual

CH-9101 Herisau/Switzerland
Tel. [phone]
Fax [phone]
E-Mail [email protected]
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
2INSTALLATION ________________________________________ 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
4SWING 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

1.1 Side View
717 Sample Changer, Overview 1
1 Overview
1.1 Side View
Safety note:
Do not operate the 717 Sample Changer without splash protection
and plug cover being mounted. The plug cover prevents any con-
tamination of the connectors, caused by spilled solvents or chemi-
cals.
Splash protection
Plug cover
Rack
Lift
Pump
Guide chain
Tower
Connectors
Stirrer rail
Distribution
head
Valve

1.2 Rear View
717 Sample Changer, Overview
2
The Connectors (side view):
Remote
Control
1 2 3 4
The remote socket serves the connection of Metrohm- or other
measuring instruments that communicate via a serial cable.
1.2 Rear View
Made by Metrohm Herisau Switzerland
Type 1.717._
Address
External Bus 0020/02 187
Remote
socket
Stirrer
sockets
Guide chain
Mounting screw
for splash protection
Pump 1
Pump 2
Valves
Plug cover
Connectors
Distribution head

1.3 Sensors
717 Sample Changer, Overview 3
The Connectors (rear):
Made by Metrohm Herisau
Switzerland
Type 1.717._
Address
External Bus 0120/02 187
1.3 Sensors
Beaker test
Front view
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 ob-
ject is placed in correct posi-
tion.
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.
Splash protection
Beaker indicator
Rack
Magnetic indicator
Manufacturing number
Magnet holder
External Bus
socket External Bus
address selector

1.4 The Sample Changer Models
717 Sample Changer, Overview
4
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
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 1 Tower 2 Tower 1 Tower 2 Tower 1 Tower 2

2.1 Setting up the Instrument
717 Sample Changer, Installation 5
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 protec-
tion. These contain shock-absorbing foam linings. As only these
special packages guarantee damage-free transport of the instru-
ment, 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 acces-
sories list, page 29ff). In case of damage, see "Warranty",
page 24.
Setting up
The 717 Sample Changer is a rugged instrument and may be
used in rough environments such as laboratories and manufac-
turing 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.

2.2 Safety Considerations
717 Sample Changer, Installation
6
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 pre-
cautions are to be strictly adhered to:
Before opening the instrument disconnect it from all electri-
cal sources. Make sure that all main cables have been dis-
connected.
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 ac-
quainted 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 con-
nected have to be switched off, otherwise all instruments could
suffer damage.
If it becomes apparent that the instrument can no longer be oper-
ated safely, it must be put out of operation.

2.3 Arranging the Accessories
717 Sample Changer, Installation 7
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 dis-
tribution head may be dismounted in this case.
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 aspira-
tion 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 bor-
ing 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.

2.3 Arranging the Accessories
717 Sample Changer, Installation
8
The pump heads of the diaphragm pump, the fittings and the cou-
pling rings are made of PVDF. PVDF is resistant to many chemi-
cals. 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 sub-
stances, you should use the 772 Peristaltic Pump Unit in combina-
tion with the 731 Relay Box instead of the diaphragm pump inte-
grated 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
Magnetic stirrers 2.741.0010
may be placed in any
position on the stirrer rail
beneath the rack.
Rack
Stirrer rail

2.3 Arranging the Accessories
717 Sample Changer, Installation 9
2.3.4 Sample Racks
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.
Magnet holder
Magnetic sensor

2.3 Arranging the Accessories
717 Sample Changer, Installation
10
2.3.5 Mounting and Setting up the Titration Heads
Macro Titration head
6.1458.010 Micro Titration head 6.1458.020
Mounting screws
Aspiration tip M8
(also for Macro Titration head )
6.1543.170
Electrode
Rotating nozzle
6.2740.000
Burette tip
Rod stirrer
2.722.0020
M6 Spray nozzles
(also for Macro Titration head)
6.2740.020
SGJ14 sleeve
6.1236.020
M8 Thread stopper
4.658.0180
SGJ9 Guide sleeve
6.2709.070
Stirrer propeller
6.1909.020
Note on Macro Titration head
The arrow sign marks the slightly sloped SGJ boring, which enables to center a rod
stirrer or an electrode in a narrow titration vessel.
Use only the designated
Micro electrodes with the
Micro Titration head, see
accessory list, page 33.

2.4 Remote Connections
717 Sample Changer, Installation 11
2.4 Remote Connections
Remote
Dosimat
717 Sample Changer
665
725
711 Liquino
759 Swing Head
731 Relay Box
Valves
Pumps,
e.g. 772
Connecting peripheral instruments to the 717 Sample Changer re-
quires Metrohm cables. Otherwise a safe data transmission may
not be guaranteed.
All instruments have to be switched off, before they are con-
nected. Otherwise the instruments could suffer from damage.
14 lines (Output 0–13) are available for the emission of signals.
For receiving signals 8 lines are provided (Input 0–7).
Pin assignment of the Remote socket:
Output6
Output7
Output4
Output2
Output0
Output8
Output9
Output10
Input1
Input3
Input5
Input7
Output11
0Volt
+5Volt
Output5
Output3
Output1
Output12
Output13
Input0
Input2
Input4
Input6
0Volt
The +5 V supply line may by charged with 20 mA maximally.
Inputs
Outputs
+5V
active = low
inactive = high
active = low
inactive = high

2.4 Remote Connections
717 Sample Changer, Installation
12
The required cables are listed in the following table. Details about
the control commands are given in the Instructions for use of the
corresponding instrument.
Instrument Cable
665/725 Dosimat 6.2139.000
711 Liquino 6.2141.020
731 Relay Box 6.2125.100
717 Sample Changer with 759 Swing Head
In order to increase the number of samples, the 759 Swing Head
with a titration head (2.759.0020) or a transfer head (2.759.0010)
can be installed in place of a normal titration head. In this way the
titration head can be moved very accurately to the individual ves-
sels located in several rows on the sample rack. You will find a
more detailed description in the chapter "Swing Head", page 16.
730
The 759 Swing Head is connected via the remote interface with a
special cable. Using the remote cables for the sample changer,
additional instruments can be connected to the remote socket,
while four lines (Input 7 and Output 11–13) are occupied by the
swing head. These four lines are ignored when the swing head is
switched on in the configuration, they are not continued in the
plug.
Connection of further
instruments via the
remote interface

2.4 Remote Connections
717 Sample Changer, Installation 13
2.4.1 External Bus Connections
Via the "External Bus" the 717 Sample Changer is operated by a
control instrument, e.g. the 726 Titroprocessor.
Four dosing instruments (Dosimat 685 or Dosino 700) may be
connected to the "External Bus" interface using a 729 Dosimat
Interface. Up to two Dosimat Interfaces may be connected in line
(daisy chaining) and be assembled with dosing instruments. Each
interface must be addressed correctly.
Before the instruments are connected, all devices have to be
switched off.
717 700685
729
Dos.2
Dos.1
729
EBus
Adress 2
Dos.3
Dos.4
EBus
Adress 1
700
685
Dos.1...4
EBus
Adress 1
EBus
Adress 0
Devices such as sample changers which consume a lot of current
should be connected in the first position of the EBus chain behind
the control instrument.
Addresses:
"External Bus"-
Address
Dosing Unit
Control instrument 0Dos. 1 … Dos. 4
1. 717 Sample Changer 1
2. 717 Sample Changer 2
1. Interface 1Dos. 1 … Dos. 4
2. Interface 2Dos. 1 … Dos. 4
The corresponding EBus address can be set with a screwdriver on
the EBus address selector that is located on the rear panel of the
device (see p. 3).
Cable 6.2135.000
Cable 6.2134.000
Control instrument

3 Sample Racks
717 Sample Changer, Sample Racks
14
3 Sample Racks
A sample rack is a sort of turntable for the positioning of beakers
which are to be placed on the 717 Sample Changer. Because for
titration, various sizes of beakers are common or required, many
kinds of racks can be used and are easily interchangeable. The
rack offers space for various numbers of samples depending on
the diameter of the beakers. Metrohm delivers the following pre-
defined types of standard racks:
*) Parallel titration at two towers possible.
If desired, other user-defined racks can be delivered. Irregular ar-
rangements of beaker positions are also possible.
Every single rack can be identified by a unique magnetic code.
Rod magnets which are attached to the bottom of the rack can be
combined to form a 6-place binary code. The sample changer can
then automatically recognize the mounted rack. This is possible
when the rack is positioned with the first rack position in front of
tower 1. When changing a rack, the sample changer should first
be reset to the normal position. This way the save recognition of a
rack and therefore the correct beaker positioning is made possi-
ble. An internal position table containing the unambiguous defini-
tion of the turning angles and beaker positions is assigned to each
rack type.
This position table is stored in the control device.
Type Number of
beakers
Type of beaker Predef.
Code
Order
Number
M12-0 12 *) 250 mL Metrohm glass beaker 000001 6.2041.310
M12-0 12 *) 150 mL glass beaker or
200 mL disposable beaker (Euro)
100000 6.2041.360
M14-0 14 200 mL disposable beaker (Euro) 000011 6.2041.370
M14-0 14 8 oz disposable beaker PP (US) 000101 6.2041.380
M16-0 16 150 mL glass beaker 000010 6.2041.320
M16-0 16 120 mL disposable beaker (US) 100001 6.2041.390
M24-0 24 *) 75 mL Metrohm glass beaker 001000 6.2041.340
M48-1 48 75 mL Metrohm glass beaker 010000 6.2041.350
M128-2 126
2
15 mL test tubes
250 mL Metrohm glass beaker
001010 6.2041.400

3 Sample Racks
717 Sample Changer, Sample Racks 15
The standard racks provided by Metrohm are already equipped
with a predefined magnetic code for every rack type. If several
racks of the same type are used, the magnet rods can be ar-
ranged differently so that a unique identification of a sample rack
is possible, if this is desired.
Format of a magnetic code (example):
000001 i.e. only one magnet is inserted, bit 0
000101 i.e. two magnets are inserted, bit 0 and 2
63 different combinations are possible. The code 000000 stands
for "no code defined".
bottom view
Magnets inserted
In this example the
code is: 000110

4.1 Prerequisites
717 Sample Changer, Swing Head
16
4 Swing Head
To ensure that the individual vessels are approached with preci-
sion even when using multiple-row sample racks, a 759 Swing
Head can be installed instead of the normal titration head. The
swing head is fitted with either a titration head (2.759.0020) or a
transfer head (2.759.0010) for pipetting the sample from the sam-
ple vessel into a bigger titrating vessel.
4.1 Prerequisites
The 759 Swing Head can be used in combination with the follow-
ing racks:
Sample rack 759 model Number of
towers
Titration 48 x 75 mL for direct titration
Article No. 6.2041.350
Article No.
2.759.0020
1, 2
Pipetting 126 x 15 mL and
2 x 150 mL for pipetting
Article No. 6.2041.400
Article No.
2.759.0010
2
If the two-row sample rack with 48 beakers is used on the 2-tower
model for direct titration, sample beakers cannot be approached
with tower 2. If the rack is used for transferring samples from 126
test tubes into two central measuring/rinsing vessels (special
beakers), all the positions can be approached with tower 1,
whereas tower 2 can only approach the two special beakers.
The swing head cannot be used in combination with other stan-
dard rack types.
4.2 Installing the Swing Head
The best procedure for installing the swing head is described be-
low. The swing head will normally be installed by our service per-
sonnel.
If a 2-tower sample changer is used, the swing head must al-
ways be connected to tower 1 (see page 4)!
With 2-tower sample changers, tower 1 is first moved into a cen-
tral lift position and tower 2 is moved into the rest position.
Turn off all mains power switches.
Install the new titration head (6.1462.020) or transfer head
(6.1462.010) on the underside of the swing head.

4.2 Installing the Swing Head
717 Sample Changer, Swing Head 17
Disengage the guide chain
Use a screwdriver to open
the guide chain in-between
two links to facilitate the
process of disassembling the
titration head and installing
the swing head.
Connect the swing head to Tower 1
Loosen screws A on both
sides and remove the titration
head together with the
mounting plate and the
lowest link. Use an angled
screwdriver for recessed-
head screws for 2-tower
sample changers. Then
loosen screws B and C and
connect the new mounting
plate for the swing head
(6.2058.000) to the bottom
link (screws C).
Before fixing the swing head to tower 1, rotate screws A a few
times in the appropriate holes to cut a thread into the plastic.
The swing head can now be
installed on the mounting
plate (screws B). Ensure that
the lead runs in the guide
chain. After screwing the
swing head and mounting
plate into place on the tower,
the bottom link is re-engaged
The splash protection supplied with the pipetting swing head
(2.759.0010) is connected to tower 2. The splash shield supplied
with the titration swing head (2.759.0020) is connected to tower 1
when used with the 2-tower model.
759 Swing
head
Titration or
transfer head
A
B
C

4.3 Accessories for the Titration Head
717 Sample Changer, Swing Head
18
The 759 swing head can now be connected to the remote socket
of the sample changer (see page 12).
The configuration of the sample changer is carried out in the con-
trol instrument.
4.3 Accessories for the Titration Head
The titration head can be
fitted with a 722 Propel-
ler Rod Stirrer, up to two
Micro electrodes, three
burette tips and three
spray nozzles.
722 Rod stirrer
2.722.0020
Micro electrode
Burette tips
M6 spray nozzle
6.2740.020
Stirring propeller
6.1909.030
M8 Aspiration tip
M6 spray nozzles
6.2740.020
M8 Thread stopper
4.658.0180
for Micro electrode or
burette tip