Metrohm 796 User Manual
CH-9101 Herisau/Switzerland
Phone +41 71 353 85 85
Fax +41 71 353 89 01
EMail info@metrohm.ch
http://www.metrohm.ch
796 Titroprocessor
Program version 5.796.0010
Instructions for use
8.796.1003 02/2000 dm
Table of content
Table of contentTable of content
1 Introduction 1
1.1 Range of applications ________________________________1
1.2 Application possibilities ______________________________1
1.3 Instrument description _______________________________3
1.3.1 Model versions............................................................................ 3
1.3.2 Front view....................................................................................3
1.3.3 Rear view..................................................................................... 4
1.3.4 Peripheral device connections.................................................... 4
1.3.5 Measuring interfaces / Measuring inputs....................................5
1.3.6 Data cards / Key cards................................................................ 5
1.3.7 The built-in thermal printer........................................................... 6
1.4 The keyboard _________________________________________7
1.4.1 Function keys (softkeys).............................................................. 7
1.4.2 Hotkeys........................................................................................ 7
1.4.3 Action keys..................................................................................8
1.4.4 Manual printing............................................................................ 8
1.4.5 Navigation and editing keys........................................................8
1.4.6 HELP key.....................................................................................9
1.4.7 The GLP key................................................................................ 9
1.4.8 Special key abbreviations............................................................ 9
1.5 Dialog _______________________________________________ 11
1.5.1 Dialog overview......................................................................... 11
1.5.2The main page...........................................................................11
1.5.3 The status window..................................................................... 12
1.5.4 The trace window...................................................................... 13
1.5.5 How to navigate......................................................................... 13
1.5.6 Field cursor................................................................................ 14
1.6 How to edit__________________________________________ 14
1.6.1 Navigation in edit mode ............................................................ 15
2 Installation 16
2.1 Instrument setup ___________________________________ 16
2.2 Mains supply ________________________________________ 16
2.3 Mains connection ___________________________________ 17
2.3.1 Fuses......................................................................................... 17
2.3.2 Mains cable and mains connection.......................................... 18
2.3.3 Setting up the thermal printer.................................................... 18
2.4 Data / key card handling (PC cards)________________ 19
2.5 Safety information __________________________________ 21
2.6 Connections ________________________________________ 22
2.6.1 System components and peripheral devices............................22
2.6.2 Dosing devices ......................................................................... 23
2.6.3 External bus............................................................................... 24
2.6.4 Sample changers...................................................................... 25
2.6.5 Sensors / Electrodes................................................................. 26
2.6.6 Connecting a balance...............................................................27
2.6.7 Connecting an external printer..................................................29
2.6.8 Connecting a bar-code reader.................................................. 30
2.6.9 Devices on the remote interface...............................................31
2.6.10 LIMS connection ..................................................................... 33
796 Titroprocessor, Instructions for use
Table of contentTable of content
3 Configuration 34
3.1 Basic settings _______________________________________34
3.2 Configuration of sample changers __________________ 38
3.2.1 Sample racks.............................................................................39
3.2.2 Special beakers.........................................................................42
3.2.3 Basic configuration of 717 Sample changer..............................43
3.3 Interface configuration______________________________ 44
3.3.1 Setting the RS232 interfaces......................................................45
3.3.2 Balances and printers................................................................45
3.3.3 Data communication settings....................................................45
3.3.4 Internal thermal printer ...............................................................46
3.3.5 Initializing the RS232 interfaces .................................................46
3.4 Buret units___________________________________________ 47
3.4.1 Tubing definitions.......................................................................48
3.4.2 700 Dosino, dosing units...........................................................49
3.4.3 685 Dosimat, exchange units ....................................................51
4 Manual operation 53
4.1 Overview_____________________________________________53
4.2 Dosing devices ______________________________________ 54
4.2.1 Automatic reagent check...........................................................54
4.2.2 Dosing device functions ............................................................55
4.2.3 Manual dosing ...........................................................................56
4.3 Sensors ______________________________________________57
4.3.1 Automatic sensor check............................................................57
4.3.2 Manual measurement ................................................................57
4.3.3 Calibration..................................................................................58
4.4 Sample changer _____________________________________ 63
4.4.1 Sample rack and lift functions....................................................65
4.5 Stirrer at measuring interface ______________________ 66
4.6 Remote lines (Input / Output) _______________________66
4.7 Print _________________________________________________67
4.7.1 The printer menu........................................................................67
4.7.2 General reports..........................................................................68
4.7.3 Determination reports ................................................................69
5 Methods and determinations 71
796 Titroprocessor, Instructions for use
5.1 General ______________________________________________71
5.2 Method editor________________________________________ 71
5.2.1 Load method..............................................................................72
5.2.2 Create new method ...................................................................72
5.2.3 Softkeys and their functions.......................................................74
5.2.4 Determination report..................................................................75
5.3 Determinations ______________________________________80
5.3.1 Carrying out a determination......................................................80
5.3.2 Individual determinations...........................................................81
5.3.3 System variables........................................................................85
5.3.4 Determination files .....................................................................85
5.3.5 Sample series............................................................................87
5.3.6 Course of a sample series.........................................................90
Table of contentTable of content
6 Sample data and sample silo 92
6.1 Sample data entry __________________________________ 92
6.1.1 Direct data transfer from balances............................................ 92
6.1.2 Bar-code reader........................................................................ 93
6.2 Sample silo _________________________________________ 93
6.2.1 Sample silo configuration..........................................................96
6.2.2 Automatic data input and output...............................................97
7 Titration and measuring modes 99
7.1 General _____________________________________________ 99
7.2 DET Dynamic equivalence point titration ________ 101
7.2.1 Measuring mode.....................................................................101
7.2.2 Reagent addition and measurement acceptance .................. 101
7.2.3 Automatic equivalence point recognition................................102
7.2.4 Fixed endpoints....................................................................... 102
7.2.5 Evaluation of pK and HNP values............................................ 102
7.3 MET Monotonic equivalence point titration ______ 104
7.3.1 Measuring mode.....................................................................104
7.3.2 Reagent addition and measurement acceptance .................. 104
7.3.3 Automatic equivalence point recognition................................105
7.3.4 Fixed endpoints....................................................................... 105
7.3.5 Evaluation of pK and HNP values............................................ 106
7.4 SET Titration to a preset endpoint _______________ 107
7.4.1 Measuring mode.....................................................................107
7.4.2 Reagent addition..................................................................... 107
7.4.3 Measuring point list.................................................................108
7.4.4 Switch-off criteria at the endpoint............................................ 108
7.5 SEC Endpoint conditioning ________________________ 109
7.5.1 Control of the conditioning mode............................................ 109
7.6 KFT Karl Fischer titrations _______________________ 111
7.6.1 Measuring mode.....................................................................111
7.6.2 Reagent addition..................................................................... 112
7.6.3 Measuring point list.................................................................112
7.6.4 Switch-off criteria at the endpoint............................................ 112
7.7 KFC Karl Fischer conditioning_____________________ 114
7.7.1 Control of the conditioning mode............................................ 114
7.8 MEAS Extended measuring functions ____________ 115
7.8.1 Measuring modes...................................................................115
7.8.2 Standard measurement........................................................... 115
7.8.3 Multiple measurement.............................................................116
7.9 CAL Calibration of pH sensors ___________________ 117
7.107.10 Calculations / Formulas __________________________ 119
7.10.1 System variables ................................................................... 121
7.10.2 Mathematical functions ......................................................... 122
7.11 Reports ___________________________________________ 124
796 Titroprocessor, Instructions for use
Table of contentTable of content
8 Command Reference 128
8.1 Titration modes ___________________________________ 128
8.2 DET ________________________________________________ 129
8.2.1 [ * Param ] Specific parameters for DET modes.....................131
8.2.2 User adjustments.....................................................................137
8.2.3 EP recognition..........................................................................139
8.2.4 Curve display ...........................................................................142
8.3 MET ________________________________________________ 144
8.3.1 [ * Param ] Specific parameters for MET modes.....................144
8.3.2 User adjustments.....................................................................145
8.3.3 EP Recognition.........................................................................146
8.3.4 Curve display ...........................................................................148
8.4 SET_________________________________________________ 149
8.4.1 Specific parameters for SET modes [* Param ].......................149
8.4.2 Custom Adjustments................................................................152
8.4.3 Curve display with SET.............................................................154
8.5 SEC ________________________________________________ 155
8.5.1 Specific parameters for SEC modes [ * Param ].....................156
8.6 KFT_________________________________________________ 159
8.6.1 Specific parameters for KFT modes [ * Param ]......................159
8.6.2 Custom adjustments................................................................165
8.6.3 Curve display with KFT.............................................................167
8.7 KFC ________________________________________________ 168
8.7.1 Specific parameters for KFC modes [ * Param ].....................169
8.8 MEAS ______________________________________________ 172
8.8.1 Standard measurement ...........................................................175
8.8.2 Multiple measurement..............................................................176
8.8.3 Curve display in MEAS modes.................................................178
8.9 CAL ________________________________________________ 179
8.9.1 Simple calibration ....................................................................179
8.9.2 Specific CAL* mode parameters [ * Param ]..........................181
8.9.3 Automatic calibration................................................................182
8.10 Sample changer commands _____________________ 184
8.10.1 Sample changer commands.................................................184
8.11 Dosing commands _______________________________ 192
8.12 CASE sequences _________________________________ 195
8.13 Communication functions _______________________ 200
8.13.1 Application mode of operation of CTRL and SCAN...............200
8.13.2 Remote connections..............................................................200
8.13.3 RS 232 interfaces...................................................................203
8.13.4 Other communication commands.........................................206
8.14 Auxiliary commands _____________________________ 207
9 Results and statistics 213
796 Titroprocessor, Instructions for use
9.1 Results page_______________________________________ 213
9.1.1 Statistics...................................................................................216
9.2 The <RESULT> key ________________________________ 218
Table of contentTable of content
10 Curves and re-evaluation 219
10.1 Single curves _____________________________________ 219
10.2 Overlapping curves _______________________________ 222
10.3 Curve presentation _______________________________ 223
10.4 Re-evaluation _____________________________________ 225
11 File manager 226
11.1 File list____________________________________________ 226
11.2 File operations____________________________________ 227
11.3 Format data card _________________________________ 228
11.4 File backup _______________________________________ 229
12 Troubleshooting 231
12.1 Error messages___________________________________ 231
12.2 Remedying storage errors________________________ 257
12.2.1 Titroprocessor new start........................................................ 257
12.2.2 RAM initialization (original initialization) ................................. 257
12.2.3 Clearing up memory errors in the data memory.................... 257
13 Appendix 260
13.1 Diagnosis _________________________________________ 260
13.2 Common variables________________________________ 270
13.3 Key cards and access control____________________ 272
13.3.1 Configuration of the softkey bars........................................... 273
13.3.2 Status definitions...................................................................274
13.3.3 Creating a key card...............................................................276
13.3.4 Modifying an existing Access Control file.............................. 277
13.3.5 Monitoring a key card............................................................277
13.4 Remote operation / Key simulation ______________ 278
13.5 Validation / GLP __________________________________ 280
13.5.1 Maintenance intervals............................................................ 280
13.5.2 Sensor test ............................................................................ 280
13.5.3 System validation................................................................... 283
13.5.4 Preparing for a validation....................................................... 284
13.6 Technical specifications _________________________ 288
13.7 Warranty and certificates ________________________ 292
13.7.1 Warranty................................................................................. 292
13.7.2 EC Declaration of conformity................................................. 293
13.7.3 Certificate of conformity and system validation..................... 294
13.8 Scope of delivery and accessories Scope of delivery and accessories ______________ 295
13.8.1 Titroprocessors ..................................................................... 295
13.8.2 Options..................................................................................296
14 Index 299
796 Titroprocessor, Instructions for use
1 Introduction
1.1 Range of applications
The Metrohm 796 Titroprocessor is a very versatile analytical instrument. It
has been designed exclusively for use in production plant and laboratories
where it covers a wide range of applications. Together with the Metrohm 717
Sample changer it is very useful when processing large series of samples
covering the whole field of titrations or for different measurement tasks.
1. Introduction
Designed as a stand-alone precision titrator and the central unit of a comprehensive high-performance analytical system, it is predestined for mastering even the most complex applications with its various measuring inputs
and dosing device interfaces. As a result of its extensive communications
possibilities it does not just work with the wide range of Metrohm titrators,
measuring instruments and dosing units, but can also control or be controlled by any other instruments equipped with a suitable communications
interface. These capabilities mean that it is the right instrument for all automation tasks imaginable in a modern laboratory and it also offers the possibility of transferring the measuring data and results it produces to an existing laboratory information management system (LIMS).
Thanks to its extremely adaptable dialog structure and its versatile range of
functions it is not only used by experts for working out complex methods,
but also by routine analysts who wish to make their work easier with predefined methods and as simple a user interface as possible.
1.2 Application possibilities
The 796 Titroprocessor is completely designed for communication:
• Two RS 232C interfaces provide rapid communication with a balance,
PC or LIMS. A parallel interface is available for use with an external
printer.
• GLP-conform printout on the built-in thermal printer or, for versions without printer, on almost any commercially available printer.
796 Titroprocessor, Instructions for use
11
1.2 Instrument description
• Up to twelve Dosinos or Dosimats can be addressed for titrating or dos-
• The 796 Titroprocessor has a connection for a bar-code reader for en-
• External instruments such as conductivity meters, dosing units, ion me-
• A measuring group on the 796 Titroprocessor comprises two high-
The run sequences for processing the individual samples can be freely defined within wide limits and can be stored as methods both in the internal
memory of the Titroprocessor or separately on a separate data card and be
transferred to other instruments of the same type.
Methods can include up to 99 command steps, of which up to five can be
titration or measuring modes whose measuring data and results can be
printed out directly, transferred to a LIMS system or stored. The measuring
data produced can be reloaded at a later date and re-evaluated and recalculated.
ing tasks.
tering sample-specific data available in bar-code format.
ters or any other peripheral devices can be operated both via the two
serial RS 232C interfaces as well as via the "Remote" socket of the Titroprocessor and the "remote" socket(s) of the 717 Sample changer(s) (two
717 Sample changers can be connected at the same time). In the full
version there are 36 output lines and 24 input lines available which can
be individually set or monitored.
impedance measuring inputs for pH, redox or ISE sensors as well as an
input for a separate reference electrode. These inputs can also serve as
differential amplifier connections. A measuring input for polarized electrodes with a polarizer also forms a part of a measuring group, as does a
measuring input for Pt 1000 or Pt 100 temperature sensors.
The instrument versions with two measuring groups have twice the number of measuring connections mentioned above.
For complex automation tasks numerous functions for operating the 717
Sample changer are available. Two sample changers can be connected at
the same time; however, in an automatic method run only one of them can
be operated at once.
If series of samples are to be processed then special start and finish sequences (OMOVE and CMOVE sequences) can be defined, each of which
is processed once only at the start and finish of a series of samples. This
means that for a series of titrations the electrodes can be conditioned or
calibrated with a specific series of buffers.
The 717 Sample changer itself offers all the functions necessary for a powerful automated system. Operation of the turntable, titrating heads, pumps
and stirrers, even the 'Remote' interface of the sample changer can be carried out directly from the Titroprocessor.
Interchangeable standard sample racks are available for many sizes of
sample vessels. Freely definable "special beaker" positions can be defined
for each rack. These are used to locate the position of rinsing or conditioning beakers in the rack; these can be selected in any part-sequence.
Key cards enable every user of the 796 Titroprocessor to have his own working environment, which includes individual status settings, his own specific
methods on the card and a customized user dialog, which means, only the
dialog pages are accessible that he needs.
22
796 Titroprocessor, Instructions for use
1. Introduction
1.3 Instrument description
1.3.1 Model versions
The 796 Titroprocessor is available in four versions.
Versions with 1 measuring group:
2.796.0010 with complete accessories, without built-in printer, but with parallel
interface for an external printer
2.796.0020 as 2.796.0010, but with built-in space-saving thermal printer
(DIN A4), without additional parallel interface for a printer
Versions with 2 measuring groups:
2.796.0110 with complete accessories, without built-in printer, but with parallel
interface for an external printer
2.796.0120 as 2.796.0110, but with built-in space-saving thermal printer
(DIN A4), without additional parallel interface for a printer
1.3.2 Front view
Model 2.796.0010 of the 796 Titroprocessor without built-in printer.
796 Titroprocessor, Instructions for use
33
1.3 Instrument description
1.3.3 Rear view
Serial number
Bar-code
connector
Stirrer Int A
connector
Measuring
interface A
External bus
connector
Remote socket
Ind A2 Ind A1 Ref Pol Pt100/1000 Ind B2 Ind B1 Ref Pol Pt100/1000
External Bus
B
Dosing unit
connectors
Printer connector
(parallel interface)
Bar Remote Printer
Code
D E F
Sensors A Sensors B
Dos. A1
Dosing Units
Dos. A2
Made by Metrohm Herisau Switzerland 50-60Hz 160VA
21
CC
Dos. A3
RS 232 Interface 1
Dos. A4
A
G
RS 232 Interface 2
2A(TH)
115V230V
Reset
Type 1.796.0010
1
0
Reset
button
RS 232 communi-
cation interface
Fuse holder
Mains switch
Mains connector
1.3.4 Peripheral device connections
Instrument Interface designation Label
Balance RS 232 interface 1 or 2 G
Indicator electrodes Sensors A or B (Ind A1, Ind A2, ..) C
Indicator electrodes Sensors A or B (Ref) C
Temperature sensors Sensors A or B (Pt100/1000) C
Stirrer Sensors A or B C
Dosing devices Dosing units A
Sample changer External bus B
Dosing interface 729 External bus B
Printer (Centronics) Printer F
Printer (serial) RS 232 interface 1 or 2 G
Bar-code reader Bar-code D
Personal computer/LIMS RS 232 interface 1 or 2 G
Auxiliary instruments Remote E
44
796 Titroprocessor, Instructions for use
1. Introduction
Notch
1.3.5 Measuring interfaces / Measuring inputs
The 796 Titroprocessor models 2.796.0110 and 2.796.0120 are equipped
with 2 measuring interfaces (Sensors A and Sensors B).
The diagram below shows where the sensors are to be connected to measuring interface A, which is found on all 796 Titroprocessor models.
Stirrer Int A con-
nector
Indicator electrode
Polarized
electrode
Pt100 / Pt1000
Temperature sensor
1
Ind A2 Ind A1 Ref Pol Pt100/1000
Sensors A
A2
Indicator electrode
A1
1.3.6 Data cards / Key cards
Data cards can be used to store methods or measuring data and to transfer
them from one instrument to another. They are an excellent mobile storage
medium.
Key cards enable every user to have his own specific methods and user interface settings.
Data cards or key cards are to be insertet in the memory card slot on the
right hand side of the 796 Titroprocessor.
Reference
electrode
796 Titroprocessor, Instructions for use
Right-hand side of housing
Eject button
Data
card
Attention must be paid to several points when handling data cards.
55
1.3 Instrument description
So-called PC cards which meet the Standard PCMCIA 2.x (68 Pins) / JEIDA
4.x can be used.
Flash cards can be read but not written on, e.g. the application card
SRAM cards can be read and written on.
Card battery
Data cards are battery-buffered storage media. The battery must be
changed periodically in order to avoid data loss. Make a note of the expiry
date of the battery which is given on the leaflet accompanying the card.
Important:
The expiry date of the battery refers to a storage temperature of 25°C. At
higher storage temperatures the working life of the battery is shorter. Do not
carry the card next to your body; do not store it near a heater or expose it to
direct sunlight. The battery has to be replaced while the card is inserted in
the instrument.
1.3.7 The built-in thermal printer
(Order. no. 6.6038.000) supplied with the Titroprocessor
Capacity: 128 KB (Order no. 6.2245.010) to 2 MB (Order
no. 6.2245.030).
Titroprocessor models with built-in printer (2.796.0020 and 2.796.0120) can
additionally have a second printer (or two) connected to an RS 232 interface. However, an additionally connected printer must have a serial interface
as Titroprocessor models with built-in thermal printers do not have a parallel
printer interface.
66
796 Titroprocessor, Instructions for use
1.4 The keyboard
1. Introduction
QUIT PRINT
ON
GLP
CAPS LOCK
OFF
STOP FORM
STOP
PG UP
NEXTDELAYSKIP
START
MAN
CONTROL
STATUS
METHOD
SAMPLE
RESULT
LINE
PRINT
FEED
SCREEN
F1 F2 F3 F4 F5 F6 F7 F8 F9
#@!
&
^$
)
(*
+
=-0987654321
µ
°
ENTER
REWQ
T
LKJHGFDSA
;
><
ALTALT
][POIUY
|":
,
\
?
/.,MNBVCXZ
HOLD
HELP
CONT
HOME
INS
DEL END PG DN
The PC-like keyboard allows comfortable editing and data input in method
development and routine use.
1.4.1 Function keys (softkeys)
F1 F2 F3 F4 F5 F6 F7 F8 F9
The blue function keys are used for navigation within the window-oriented
operator dialog system. The function of these keys depends on the dialog
page and the particular window. The softkey bar at the lower edge of the
screen always shows the possible functions.
MAN
CONTROL
STATUS
METHOD
SAMPLE
RESULT
1.4.2 Hotkeys
The yellow hotkeys allow direct access to the most important functions or
dialog pages of the 796. Hotkeys can be used anywhere in dialog except
during the 'live' display of a curve while a determination is being carried out.
MAN CONTROL - opens the dialog page for manual operation
STATUS - displays the status information as shown on the main page
METHOD - opens the method selection window
SAMPLE - opens the sample input window or the sample silo
RESULT - opens a window which shows short result reports and statistics
796 Titroprocessor, Instructions for use
77
1.4 Instrument description
1.4.3 Action keys
The action key have an immediate effect on the course of a method. The
<START> key starts a method; the <STOP> key ends it. The <HOLD /
CONT> key can be used to interrupt a method or to resume it.
If the <Shift> key is pressed at the same time as an action key the processing of a series of samples can be controlled directly (with Autostart 'on').
<Shift><START> (=NEXT) ends the processing of the current sample and
starts processing the next sample in the series.
<Shift><STOP> (=DELAY) stops the sample series after the current sample has been processed.
<Shift><HOLD> (=SKIP) ends the execution of the current command and
jumps to the next command line of the loaded method.
1.4.4 Manual printing
HOLD
CONT
STOP
NEXTDELAYSKIP
START
QUIT
STOP FORM
PRINT
FEED
LINE
PRINT
SCREEN
The built-in A4 thermal printer or any other connected printer can be operated manually with the yellow printer keys.
The <PRINT> key opens the printer menu where the type of report can be
selected. Global reports and determination reports (if a determination report
is present in the working menu) can be selected.
<Shift><PRINT> (= STOP PRINT) interrupts a printout immediately.
<LINE FEED> executes a line feed on the connected printer.
<Shift><LINE FEED> (= FORM FEED) executes a form feed on the con-
nected printer.
<PRINT SCREEN> prints the current screen contents.
1.4.5 Navigation and editing keys
The <QUIT> key closes an editing field, a window or a dialog page and accepts previous parameter modifications. The dialog switches to the next
higher level.
<INS> (= Insert) switches the insert mode on/off for editing an entry
<DEL> (= Delete) deletes the character to the right of the cursor position
<Shift><DEL> deletes a complete editing field.
<HOME> places the cursor on the first editing field of a dialog window (in
navigation mode).
<END> places the cursor on the last sample silo line or command line (in
method editor).
88
796 Titroprocessor, Instructions for use
1. Introduction
HOME
INS
DEL END PG DN
PG UP
<PG UP> moves the field cursor in the sample silo or method editor up by
one page.
<PG DN> moves the field cursor in the sample silo or method editor down
by one page.
<Cursor up> moves the cursor up by one line.
<Cursor down> moves the cursor down by one line.
<Cursor left> moves the cursor one field (in navigation mode) or one char-
acter (in editing mode) to the left.
<Cursor right> moves the cursor one field (in navigation mode) or one
character (in editing mode) to the right.
1.4.6 HELP key
HELP
The <HELP> key opens a page with help texts which refer to the opened
dialog page or window. In the editing mode it opens a help window for parameter input.
1.4.7 The GLP key
GLP
The GLP key opens the dialog pages in which the basics functions for validating the Titroprocessor as an analytical system and for checking sensors
(sensor test) can be carried out.
1.4.8 Special key abbreviations
For certain functions special key combinations have been provided; these
are listed below.
ALT+↑↑ increase display contrast
ALT+↓↓ reduce display contrast
ALT+A opens a dialog window to enter the access control page
ALT+T transfer screen contents via the communications interface
(printscreen to RS 232 interface)
ALT+X transfer screen contents via the communications interface
(with screen attributes line by line)
ALT+U transfer screen contents via the communications interface
(with screen attributes character by character)
796 Titroprocessor, Instructions for use
ALT+V transfer field contents of a selected editing field via the
communications interface
SHIFT+ALT
+DEL Titrator restart (mains on)
99
1.4 Instrument description
Entry of special characters
In the editing mode any character contained in the ASCII character set can
be entered. This is carried out by first entering the character ^ and then the
3-place number of the required character. This is then displayed immediately.
Examples:
αα →→ ^224
ββ →→ ^225
≈≈ →→ ^247
≥≥ →→ ^242
≤ ≤ →→ ^243
±± →→ ^241
The complete table of the characters which are possible and their character numbers:
032 048 0 064 @ 080 P 096 ``112 p 128 Ç 144 É 160 á 176 °° 192 ÀÀ 208 ÐÐ 224 αα 240 ≡≡
033 ! 049 1 065 A 081 Q 097 a 113 q 129 ü 145 æ 161 í 177 ±± 193 ÁÁ 209 ÑÑ 225 ββ 241 ±±
034 "" 050 2 066 B 082 R 098 b 114 r 130 é 146 Æ 162 ó 178 ²² 194 ÂÂ 210 ÒÒ 226 ΓΓ 242 ≥≥
035 # 051 3 067 C 083 S 099 c 115 s 131 â 147 ô 163 ú 179 ³³ 195 ÃÃ 211 ÓÓ 227 ππ 243 ≤≤
036 $ 052 4 068 D 084 T 100 d 116 t 132 ä 148 ö 164 ñ 180 ´´ 196 ÄÄ 212 ÔÔ 228 ΣΣ 244 ⌠⌠
037 % 053 5 069 E 085 U 101 e 117 u 133 à 149 ò 165 Ñ 181 µµ 197 ÅÅ 213 ÕÕ 229 σσ 245 ⌡⌡
038 & 054 6 070 F 086 V 102 f 118 v 134 å 150 û 166 ª 182 ¶¶ 198 ÆÆ 214 ÖÖ 230 µµ 246 ÷
039 '' 055 7 071 G 087 W 103 g 119 w 135 ç 151 ù 167 º 183 ·· 199 ÇÇ 215 ×× 231 ττ 247 ≈≈
040 ( 056 8 072 H 088 X 104 h 120 x 136 ê 152 ÿ 168 ¿ 184 ¸¸ 200 ÈÈ 216 ØØ 232 ΦΦ 248 °°
041 ) 057 9 073 I 089 Y 105 i 121 y 137 ë 153 Ö 169 ©© 185 ¹¹ 201 ÉÉ 217 ÙÙ 233 ΘΘ 249 ••
042 * 058 : 074 J 090 Z 106 j 122 z 138 è 154 Ü 170 ªª 186 ºº 202 ÊÊ 218 ÚÚ 234 ΩΩ 250 ⋅⋅
043 + 059 ; 075 K 091 [ 107 k 123 { 139 ï 155 ¢ 171 ½ 187 »» 203 ËË 219 ÛÛ 235 δδ 251 √√
044 ,, 060 < 076 L 092 \ 108 l 124 ¦ 140 î 156 £ 172 ¼ 188 ¼¼ 204 ÌÌ 220 ÜÜ 236 ìì 252 üü
045 -- 061 = 077 M 093 ] 109 m 125 } 141 ì 157 ¥ 173 ¡ 189 ½½ 205 ÍÍ 221 ÝÝ 237 ø 253 ²
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1010
796 Titroprocessor, Instructions for use
1.5 Dialog
1. Introduction
1.5.1 Dialog overview
The user dialog of the 796 Titroprocessor consists of 10 dialog pages,
which contain hierarchically structured subwindows.
Main
page
Sub-
window
Load
method
window
Sub-
Files
page
Sub-
window
Method
page
Sub-
window
sub-
window
Curves
page
Results
page
Samples
page
Card
Sign on
Configuration
page
Sub-
window
The main page of the 796 Titroprocessor is the entry to the user dialog. All
other pages can be accessed by using the corresponding softkeys (<F1>
to <F9>).
1.5.2 The main page
The main page in standard user level.
Date and time
ЪДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД¿
³ 2000-02-21 08:31:19 MAIN PAGE 796 Titroprocessor * ready * ³
³ ³
³ Method Tutorial.mth Simple acid/base titration ³
³ ДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД³
³ ³
³ ЪДДДДДДДДДД Application Note ДДДДДДДДДДДДДДД¿³
³ User B. Miller ³ ³³
³ ³ This is a simple application method for ³³
³ ³ acid or base titrations. ³³
³ ³ ³³
³ ³ Example: ³³
³ ³ ------------------------------------------³³
³ ³ Weigh 150 mg TRIS in a beaker, dilute in ³³
³ ³ 70-80 mL dist. water and titrate with ³³
³ ³ c(HCl)=0.1 mol/L. ³³
³ ³ Use a comb. pH electrode as sensor. ³³
³ ³ ³³
³ АДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДЩ³
³ ³
³ Ident1 Ident2 Ident3 Size Unit ³
³ Sample ³
³ ³
³ Remark ³
³ ³
³ ЪДДДДДДДВДДДДДДДВДДДДДДД¿ ЪДДДДДДДВДДДДДДДВДДДДДДД¿ ЪДДДДДДДВДДДДДДДВДДДДДДД¿ ³
³ ³Config.³Load ³File ³ ³Edit ³Show ³Results³ ³Sample ³Card ³Common ³ ³
³ ³ ³method ³manager³ ³method ³curves ³ ³ ³silo ³Sign on³vars ³ ³
³ АДДДДДДДБДДДДДДДБДДДДДДДЩ АДДДДДДДБДДДДДДДБДДДДДДДЩ АДДДДДДДБДДДДДДДБДДДДДДДЩ ³
АДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДЩ
Sample data
Instrument state
Method name and comment
Application note
and trace window
Softkey bar
Variables
page
796 Titroprocessor, Instructions for use
1111
1.5 Instrument description
The main page in expert user level.
Date and time
ЪДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД¿
³ 2000-02-02 09:24:13 MAIN PAGE Titroprocessor 796 * ready * ³
³ ³
³ Method 3455.mth Chloride in Tap Water ³
³ ДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД³
³ ³
³ Auto save on 1.7 % free ³ Pipet accurately 100.00 mL of sample in a ³³
³ Destination Data card ³ 150 mL beaker. ³³
³ Determ.name ³ ³³
³ ³ Reagent: c(HNO3)=2 mol/L Dos A2 ³³
³ Auto start on 1 of 10 ³ Titrant: c(AgNO3)=0,01 mol/L Dos A1 ³³
³ Silo on in# 12 out# 1 ³ Sensor : Ag-Titrode 6.0430.100 Ind A1 ³³
³ Changer 1 Sample pos. 1 ³ ³³
³ АДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДЩ³
³ ³
³ Ident1 Ident2 Ident3 Size Unit ³
³ Sample 001120/1 12 3455 100 mL ³
³ ³
³ Remark ³
³ ³
³ ЪДДДДДДДВДДДДДДДВДДДДДДД¿ ЪДДДДДДДВДДДДДДДВДДДДДДД¿ ЪДДДДДДДВДДДДДДДВДДДДДДД¿ ³
³ ³Config.³Load ³File ³ ³Edit ³Show ³Results³ ³Sample ³Devices³Common ³ ³
³ ³ ³method ³manager³ ³method ³curves ³ ³ ³silo ³ManCtrl³vars. ³ ³
³ АДДДДДДДБДДДДДДДБДДДДДДДЩ АДДДДДДДБДДДДДДДБДДДДДДДЩ АДДДДДДДБДДДДДДДБДДДДДДДЩ ³
АДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДЩ
³ ЪДДДДДДДДДД Application note ДДДДДДДДДДДДДДД¿³
³ User B. Miller ³ Chloride in Tap Water ³³
³ Run number 000 ³ ------------------------------------------³³
³ Statistics on 0 of 10 ³ Sample preparation: ³³
Status
³ ³ ³³
Area
Sample data
Instrument state
Method name and comment
Application note
and trace window
Softkey bar
The settings of the status area are the same as in the status window
(<STATUS>key). See below for details.
1.5.3 The status window
In the standard user level the status settings are available only in the status
window. The <STATUS> key on the keyboard will open the status window.
ЪДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД¿
АДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДЩ
³ 2000-02-10 14:04:05 MAIN PAGE 796 Titroprocessor * ready * ³
³ ³
³ Method Acid.mth Acid titration c(HCl)=0.1 mol/L ³
³ ДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД³
³ ³
³ ЪДДДДДДДДДД Application Note ДДДДДДДДДДДДДДД¿³
³ UseЪДДД Status ДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД¿ ³³
³ ³ ³ ³³
³ ³ Run number 000 Determination name ³------³³
³ ³ ³te in ³³
³ ³ Sample silo on Next sample in silo line 1 ³th ³³
³ ³ Sample entry in silo line 1 ³ ³³
³ ³ ³ ³³
³ ³ Auto start on Current sample 0 of 9999 ³ ³³
³ ³ ³ ³³
³ ³ Statistics on Data records 0 of 2 ³ ³³
³ ³ ³ ³³
³ ³ Save determ. data on Destination Data card ³ДДДДДДЩ³
³ ³ Free Memory 1.6 % ³ ³
³ ³ ³ ³
³ Sam³ Sample changer 1 First rack position 1 ³ ³
³ ³ ³ ³
³ RemАДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДД QUIT ДЩ ³
³ ³
³ ЪДДДДДДДВДДДДДДДВДДДДДДД¿ ЪДДДДДДДВДДДДДДДВДДДДДДД¿ ЪДДДДДДДВДДДДДДДВДДДДДДД¿ ³
³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³
³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³ ³
³ АДДДДДДДБДДДДДДДБДДДДДДДЩ АДДДДДДДБДДДДДДДБДДДДДДДЩ АДДДДДДДБДДДДДДДБДДДДДДДЩ ³
1212
796 Titroprocessor, Instructions for use
1. Introduction
command with line number
quantity
Measured value
1.5.4 The trace window
During the course of a method the display window of the application note
changes to a trace window, showing the state of the currently executed
command. The display format depends on the current command or mode.
Line time
Measuring
Control indicator
ЪДДДДДДДДДДДДДДДДД Trace ДДДДДДДДДДДДДДДДДДД¿
³ 0s 1. DET_PH* Titr. ³
³ ³
³ ЬЫЫЫЬ ЬЫ ЬЫ ³
³ Ы Ы Ы Ы ЫЯЫ ЫЯЫ ³
³ Ы Ы ЯЫЫЫЫ Ы ЫЯ Ы ³
³ ЫЫЫЬ ЫЫЫЫЫ Ы Ы Ы Ы ³
³ Ы Ы Ы Ы Ь Ы Ы ЫЫЫЫЫ ³
³ ЫЫЫЯ Ы Ы ЯЫЫЫЯ Ы ЫЫЫЫ Ы ³
³ Ы ³
³ Ы ³
³ 2.991mL 1 EP's ³
АДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДЩ
or
ЪДДДДДДДДДДДДДДДДД Trace ДДДДДДДДДДДДДДДДДДД¿
³ 0s 1. SET_PH* Titr. ³
³ ³
³ ЬЫ ЬЫЫЫЬ ЬЫЫЫЬ ЬЫЫЫЬ ³
³ ЫЯЫ Я Ы Ы Ы Ы Ы Ы ³
³ Ы ЫЫЯ ЯЫЫЫЫ ЯЫЫЫЫ Ы ³
³ Ы ЯЫ Ы Ы ЫЫЬЫЬ Ы ³
³ Ы Ь Ы Ь Ы Ь Ы Ы Ы Ы Ы ³
³ ЫЫЫЫ Ы ЯЫЫЫЯ ЯЫЫЫЯ ЯЫЫЫЯ Ы Ы Ы ЫЫЫЫ ³
³ ³
³ ЫЭЭЭЭЭЭ.............. ³
³ pH 9.81 ³
АДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДДЩ
Dispensed volume
Status
Measured value
Equivalence points
found
Dispensed volume
1.5.5 How to navigate
To navigate from page to page or from subwindow to subwindow you can
use the blue function keys <F1> to <F9> . These function keys alter their
meaning or functionality, depending on the dialog page or window that is
shown on the screen. The function of the corresponding function key is always shown at the bottom of the screen. It is called the softkey bar. The
function keys (<F1> to <F9>) are called softkeys.
ЪДДДДДДДВДДДДДДДВДДДДДДД¿ ЪДДДДДДДВДДДДДДДВДДДДДДД¿ ЪДДДДДДДВДДДДДДДВДДДДДДД¿
³Config.³Load ³File ³ ³Edit ³Show ³Results³ ³Sample ³Card ³Common ³
³ ³method ³manager³ ³method ³curves ³ ³ ³silo ³Sign on³vars ³
АДДДДДДДБДДДДДДДБДДДДДДДЩ АДДДДДДДБДДДДДДДБДДДДДДДЩ АДДДДДДДБДДДДДДДБДДДДДДДЩ
F1
F9F8F7F6F5F4F3F2
A dialog page or window can be left or closed by pressing the <QUIT> key.
Any prior modifications of parameters will be accepted.
796 Titroprocessor, Instructions for use
1313
1.6 Instrument description
The shortcut keys of the rightmost key column on the keyboard allow direct
access to some important dialog windows or features.
The shortcut keys are: <MAN CONTROL>, <STATUS>, <METHOD>,
<SAMPLE>, <RESULT>.
1.5.6 Field cursor
To navigate on a page or in a dialog window you can use the cursor keys
<ç>, <è>, <é> or <ê>. The position of the so called field cursor is
indicated by the black field background of the edit field the cursor is pointing to. To navigate right or left within a line you can use the <TAB> key or
the <Shift><TAB> key combination, respectively. The <HOME> key sets
the field cursor to the first edit field of a page or dialog window.
1.6 How to edit
To edit an entry of an edit field just type in the new value or press the
<SPACE> key. In most cases a picklist is shown, from which you can select
a given value by using the cursor keys <êê> and <éé>. The selection must
be confirmed with <ENTER> or the picklist may be closed by pressing the
<QUIT> key. The field cursor will turn into a block cursor which indicates the
edit mode.
The PC-like keyboard allows comfortable editing of text or numeric entries.
To erase any character use the <DEL> (forward deletion) or the
<BACKSPACE> key (<[ çç ]> backward deletion). The <INS> key switches
the insert mode to the overwrite mode and vice versa.
In this mode a special softkey bar is shown.
ЪДДДДДДДВДДДДДДДВД … ДВДДДДДДД¿
³Help on³Select ³ … ³Cancel ³
³entry ³ ³ … ³ ³
АДДДДДДДБДДДДДДДБД … ДБДДДДДДДЩ
• The [Help on entry] softkey may be used to open a window with a short
explanation of the meaning or the content of the entry field to be edited.
The entry range and one or more examples for entry values will be
shown.
• The [Select] softkey opens the picklist of the selected entry field. If no
picklist is available, the [Select] softkey is displayed in gray letters to indicate that its function is not available.
• The [Cancel] softkey rejects any modifications and resets the former
field content. The edit mode will be canceled as well.
Modifications of field contents are to be confirmed with the <ENTER> or the
<QUIT> key. The latter will terminate the edit mode.
1414
796 Titroprocessor, Instructions for use
1. Introduction
Tip:
If the edit mode (entry on the configuration page, or press the <INS>key) is
set to 'overwrite', you can simply type in the first letter or the first two letters
of an entry item and press <ENTER> to change the content of an entry field
with a selector list. If this entry can be uniquely assigned to an item of the
selector list, it will be automatically completed.
Example:
To change the destination memory of data files for use with the auto save
function, set the field cursor to the destination field on the Titroprocessor's
main page. Type 'd' then and press the <ENTER>key. The entry of the de-
stination field will be set automatically to 'Data card'.
This is the quickest way to modify entry fields .
1.6.1 Navigation in edit mode
In edit mode the cursor keys <çç> and <èè> allow the navigation within an
entry field. To access other fields in the same line use the <TAB> key or the
<Shift><TAB> key combination, respectively. The cursor keys <êê> and
<éé> allow vertical navigation.
796 Titroprocessor, Instructions for use
1515
2.1 Safety information
2 Installation
2.1 Instrument setup
Packaging
The 796 Titroprocessor is supplied together with the specially packed accessories in packaging containing shock-absorbing foam which provides
excellent protection. Please store this special packaging as it guarantees
damage-free transport of the instrument.
Checks
Please check immediately on receipt whether the shipment is complete and
undamaged (compare with delivery note and list of accessories on page
290). If transport damage is established see section 13.7 Warranty and
certificates (p. 292).
Location
Place the 796 Titroprocessor in a convenient working position in the laboratory; this should be vibration-free and not exposed to corrosive atmospheres or contamination by chemicals.
2.2 Mains supply
Follow the instructions given below for connection to the mains
supply. If the instrument is operated with the mains voltage incorrectly set and/or the wrong mains fuse there could be a danger of
fire!
Setting the mains voltage
Before switching on the 796 Titroprocessor for the first time check that the
mains voltage set on the instrument (can be seen in the mains voltage selector) corresponds to the local mains voltage. The mains voltage selector is
located on the rear panel of the instrument: please refer to following page.
If the mains voltage is incorrectly set then it must be set correctly by sliding
the mains voltage selector with the help of a screwdriver:
1616
230V
230V: 220V ... 240 V ± 10%
115V: 100V ... 120 V ± 10%
115V
796 Titroprocessor, Instructions for use
Earth socket
115V: 100V...120V 10%
230V: 220V...240V 10%
230V
22. . InstallationInstallation
Mains voltage selector
S1
2A(TH)
Mains switch
115V
230V
Mains connection
50-60Hz 160VA
2.3 Mains connection
2.3.1 Fuses
Two fuses S1S1 and S2S2 are built into the 796 Titroprocessor as standard;
both are type 2 ATH (2 A, slow-blow, with high switching capacity, Metrohm
order no. U.600.0107).
Make sure that the instrument is never operated with any different type
of fuse as otherwise there is a fire hazard!
S2
Fuse holder
Rear view
For continued protection replace only
WARNING - Fire Hazard -
with the same type and rating of fuse
To change blown fuses proceed as follows:
Exchange fuse S1 (zero conductor, 2 ATH)
• Remove mains cable from mains connector.
• Use a screwdriver to turn fuse holder S1S1 to the left until it can be pulled
out.
• Pull out the fuse holder, remove the blown fuse and replace it with a
spare fuse (2 ATH).
• Insert the fuse holder in the instrument, press it down with a screwdriver
and then turn it to the right to fix it in position.
Exchange fuse S2 (phase, 2 ATH)
• Remove mains cable from mains connector.
• Use a screwdriver to push fuse holder S2S2 upwards until it can be pulled
out.
• Pull out the fuse holder, remove the blown fuse and replace it with a
spare fuse (2 ATH).
• Insert the fuse holder in the instrument and push until it clicks into place.
796 Titroprocessor, Instructions for use
1717
2.3 Safety information
2.3.2 Mains cable and mains connection
The instrument is supplied with one of three types of cable:
• 6.2122.020 with plug SEV 12 (Switzerland, …)
• 6.2122.040 with plug CEE(7), VII (Germany, …)
• 6.2133.070 with plug NEMA 5-15 (USA, …)
which has three leads and is fitted with a plug with an earthing pin. If a different plug has to be fitted then the yellow/green lead (IEC standard) must
be connected to the earth (protection class 1). If no earthed socket is available then a proper earth connection must be made via the earthing socket
of the instrument.
Any break in the earthing lead, whether inside or outside the instrument, can cause the instrument to become a hazard!
Insert the mains cable into the mains connector of the 796 Titroprocessor.
2.3.3 Setting up the thermal printer
Insert paper (only for the built-in printer)
The thermal printer of the Titroprocessors (models 2.796.0010 and
2.796.0110) is supplied without inserted paper. The thermal paper
6.2237.040 included with the accessories (roll approx. 40 m ≅ 130 A4
pages) is inserted into the printer as follows:
Preparations
• Switch on 796 Titroprocessor.
• Lift up the printer cover.
• Make sure that the roll of thermal paper 6.2237.040
has a straight edge; if necessary, carefully tear off the
paper at the first perforation.
• Remove any scraps of paper or dust from the paper
storage compartment. Check the new paper roll for
scraps, too.
Insertion
• Insert paper spool 6.2241.020 in thermal paper roll 6.2237.040.
• Place the roll of paper with the paper spool in the two recesses at the
sides of the printer so that the paper leaves the roll from the rear and the
file hole margin is on the left-hand side when seen from the front.
• Carefully insert the straight-edged paper manually into the paper guide
slot to the limit stop and hold it there.
1818
Paper transport
• Press the two keys <Shift> and <FORM/LINE FEED>. The paper will
be fed in automatically and transported to the correct position.
• Close the cover of the paper storage compartment.
796 Titroprocessor, Instructions for use
2.4 Data / key card handling (PC cards)
The 796 Titroprocessor can write data onto SRAM storage cards and read
this data in at a later date. It is not possible to use FLASH cards others than
the one delivered with the instrument. The following SRAM cards can be
used as storage or key cards:
• 6.2245.030 Metrohm Data card (capacity 2 MB)
• 6.2245.010 Metrohm Data card (capacity 128 kB)
• Commercial SRAM cards of any capacity (up to 4 MB) with the hardware
format JEIDA 4.0 (68 pin) as well as PCMCIA cards based on them
Because of different file systems PCMCIA cards cannot be used at
the same time for the 796 Titroprocessor and PCs.
When handling data cards with the 796 Titroprocessor the following points
are important:
SRAM card preparation
The following preparations are necessary before data cards (or key cards)
are used for the first time:
22. . InstallationInstallation
• New SRAM cards are supplied with a separately included battery. This
should be inserted in the memory card according to the accompanying
description.
• Data cards can only be inserted in the instrument in the position shown
below. The included label should be attached to the top of the data card.
Label
• The SRAM card battery has a limited lifetime; this is given in the accompanying leaflet. In order to avoid accidental loss of data, the date when
the battery is due to be exchanged should be written on the data card
label.
• Before data can be stored on the SRAM card it must be formatted. Proceed as follows:
• Insert card in the 796 Titroprocessor (see above drawing).
• Select file manager with the softkey [File manager] on the main
page. Change the memory area with the softkey [Change storage],
select 'data card' with the cursor keys and press <ENTER>.
Notch
796 Titroprocessor, Instructions for use
• If an unformatted SRAM card has been inserted a system window
appears on the display. Enter <f> to format the card.
• A query about the card name is then made. A name with max. 20
characters can be entered; this will now be displayed in the file manager whenever the card is inserted. When the entry has been completed the data card is formatted with <Enter>.
1919
2.4 Safety information
Data card insertion and removal
• The data card can only be inserted in den 796 Titroprocessor in one
particular position (see above illustration). It must be pressed firmly
into the slot provided until the eject button fully protrudes.
• A data card inserted into the Titroprocessor slot can be ejected by
pressing the eject button and then removed manually.
SRAM cards are sensitive to electrostatic charges. Make sure that
you are earthed each time you insert or remove a data card (e.g.
by previously touching the earthed green 796 Titroprocessor
housing).
Changing the battery
• The battery of the SRAM card has a limited working life which is given
in the leaflet accompanying the card. Please note that the working life
of batteries depends on the storage temperature. Data cards or
spare batteries should therefore be stored as cool as possible (in any
case below 25°C).
• The date for the next battery change should be marked on the data
card label (see above). In order to avoid accidental data loss the
battery should be replaced by this date at the latest.
• Insert the data card in the 796 Titroprocessor.
The battery must only be exchanged with the card inserted in the
instrument, as otherwise the data stored on the card will be lost.
The card is powered by the Titroprocessor while the battery is being changed.
• Change the battery according to the accompanying description.
• Mark the data card label with the new date for the next battery
change (see under ”data card preparation” above).
2020
796 Titroprocessor, Instructions for use
2.5 Safety information
If failure or malfunctioning occurs during operation of the 796 Titroprocessor
we recommend that the diagnostic functions are first used to try and determine the cause (see page 260). If this does not help to rectify the failure or if
the cause of the malfunction cannot be remedied then please consult the
service department of your local Metrohm agency.
If opening the instrument cannot be avoided then the following safety
measures must be strictly observed:
The instrument must be disconnected from all electricity supplies before opening. Make sure the mains plug has been pulled
out.
Only in exceptional cases should the instrument be opened while it is
switched on. As this exposes current-conducting components it should only
be undertaken by an expert who is familiar with the associated dangers.
22. . InstallationInstallation
Electronic components are sensitive to static electricity and can be destroyed by discharges. Before touching any components inside the instrument both the person and his tools should be earthed by grasping an
earthed object (e.g. the instrument housing or a radiator) in order to eliminate any static electricity.
If it becomes apparent that the instrument can no longer be operated safely
then it should not be used at all.
796 Titroprocessor, Instructions for use
2121
2.6 Safety information
Dosinos /
external
2.6 Connections
2.6.1 System components and peripheral devices
717 Sample changer
external
71
796
devices
External bus
700 Dosinos
700
700
71
729
729 Dosimat
interface
bar-code reader
devices
external
devices
700
700
729
729 Dosimat
interface
685 Dosimats
685
685
printer
685 685
Dosimats
700685 700685
sensors
balance
PC / LIMS
The 796 Titroprocessor can be extended to provide an automated and
comprehensive analytical system.
Metrohm cables should always be used to connect Metrohm instruments
and accessories, as only these guarantee interference-free data transmission. For instruments from other manufacturers please observe the manufacturer's recommendations.
The Titroprocessor offers the following connections:
• 4 dosing devices, further (up to 8) dosing devices can be connected via
the 'External bus' (see below).
• 2 measuring groups (models 2.796.0010 and 2.796.0020 have only 1
measuring group) each with measuring inputs for 2 indicator electrodes
(or combined measuring electrodes), 1 reference electrode, 1 polarizable electrode (voltammetry/amperometry, KF titrations), 1 Pt100/Pt1000
temperature sensor connection, 1 stirrer connection
• 1 'External bus' connection for up to two 717 Sample changers and/or
up to 8 dosing devices, to be connected via Dosimat interfaces 729 (4
dosing devices per interface)
• 2 serial RS 232 connections (25-pole) for balance, printer or personal
computer (LIMS, automatic data storage or remote control of the 796 Titroprocessor)
2222
796 Titroprocessor, Instructions for use
• 1 parallel printer connection for any external printer (only for models
• 1 bar-code reader connection (9-pole) for entering sample data
• 1 remote connector (25-pole) with 8 input and 8 output leads for control-
2.6.2 Dosing devices
22. . InstallationInstallation
2.796.0010 and 2.796.110)
ling external peripheral devices (e.g. Relay Box, KF Oven, etc.). Each
717 Sample changer has a further remote connector (25-pole) with 8 input and 14 output leads which can be directly addressed from the 796
Titroprocessor.
Dos. A1
Dos. A3
Up to 4 dosing devices can be
directly connected to the rear panel
of the Titroprocessor. For connecting a 685 Dosimat you need a
6.2134.000 cable.
Dos. A2
Dosing Units
A
Dos. A4
Dosing devices are recognized by
the addresses A1 to A4.
Two different types of Metrohm dosing device are available for selection:
• 685 Dosimat, with the normal exchange units.
• 700 Dosino, with 710 dosing unit
700 Dosino
10 ml
Dosinos are operated by the 796 Titroprocessor
in the standard configuration, i.e. the reagent is
drawn in from the bottle via Dosino port 2 (filling
port) and added via port 1 (dosing port). The port
occupancy cannot be changed when a Dosino is
used with the 796 Titroprocessor.
796 Titroprocessor, Instructions for use
685 Dosimats and 700 Dosinos can be combined
as required.
Switch off the 796 Titroprocessor before connecting an instrument
to it. When it is switched on again the Titroprocessor automatically
recognizes the new instrument.
If more than four dosing devices are to be connected then the additional
dosing devices should be connected via 729 Dosimat interface to the
'External bus' (for connections see sample changer below).
729
Plug the 729 Dosimat interface directly into the 'External bus' socket of the
Titroprocessor or, if installed, into the corresponding socket of the
717 Sample changer.
2323
2.6 Safety information
2.6.3 External bus
The external bus allows external instruments to be controlled by the 796 Titroprocessor. Sample changers and dosing devices such as the 685 Dosimat or the 700 Dosino can communicate bi-directionally with the Titroprocessor (=bus master).
External devices must be connected with EBus cables according to the following scheme:
Bus master
Each external instrument is identified by an EBus address. When the Titroprocessor is switched on they are automatically identified. An EBus address
must be set for each external device (1…9, A…F; 0 stands for the bus
master).
External device EBus
Sample changer 1
External device External device
External bus
Address selector
The corresponding EBus address can be set with
a screwdriver. The EBus address selector is usually located on the rear panel of the external device.
Corresponding
address
1
1…2 lifts, 0…4 pumps,
1…4 stirrers
peripherals
2424
Sample changer 2
Dosimat interface 1
Dosimat interface 2
Devices such as sample changers which consume a lot of current should
be connected in the first position of the EBus chain. This is particularly important if the relevant sample changer is equipped with more than one
pump. The 729 Dosimat interfaces should be connected to the 717 Sample
changer.
The 796 Titroprocessor and the Dosimat interfaces must be connected to
the same earth. A line distributor should be used to supply all devices on
the external bus.
The 796 Titroprocessor must be switched off before a peripheral device is connected.
2
1
2
1…2 lifts, 0…4 pumps,
1…4 stirrers
1…4 Dosimats (B1…B4)
1…4 Dosimats (C1…C4)
796 Titroprocessor, Instructions for use
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