Metrohm 785 DMP Titrino User manual

CH-9101 Herisau/Switzerland
Tel. [phone]
Fax [phone]
CompuServe 100031,3703
Internet http://www.metrohm.com
785 DMP Titrino
Instructions for Use
8.785.1003
99.07 Ti

Table of contents
785 DMP Titrino
Table of contents
1 Overview...................................................................................................................1
2 Manual operation .....................................................................................................4
2.1 Keypad.......................................................................................................................... 4
2.2 Principle of data input .................................................................................................. 5
2.3 Text input...................................................................................................................... 6
2.4 Configuration, key <CONFIG>................................................................................... 7
2.5 Selection of the mode, key <MODE>...................................................................... 13
2.6 Parameters, key <PARAM> ..................................................................................... 14
2.6.1 Parameters for DET and MET............................................................................. 14
2.6.2 Parameters for SET ............................................................................................. 24
2.6.3 Parameters for MEAS.......................................................................................... 33
2.6.4 Parameters for CAL............................................................................................. 35
2.6.5 Parameters for TIP............................................................................................... 37
2.7 Result calculations..................................................................................................... 38
2.8 Statistics calculation................................................................................................... 41
2.9 Common variables..................................................................................................... 43
2.10 Data output............................................................................................................... 44
2.10.1 Reports for the output at the end of a determination....................................... 44
2.10.2 Display of the titration curve.............................................................................. 47
2.11 User name, key <USER>....................................................................................... 48
2.12 TIP, Titration procedure............................................................................................ 49
2.13 Method memory, keys <USER METH> and <CARD>........................................ 53
2.13.1 Key <USER METH>......................................................................................... 53
2.13.2 Key <CARD> ................................................................................................... 55
2.14 Calibration data, key <CAL.DATA>........................................................................ 58
2.15 Current sample data, key <SMPL DATA>............................................................. 59
2.16 Silo memory for sample data................................................................................... 60
2.17 Storing determination results and silo calculations ................................................ 63
2.17.1 Storing determination results............................................................................ 63
2.17.2 Silo calculations................................................................................................. 64
3 Operation via RS232 Interface (green part)............................................................67
3.1 General rules.............................................................................................................. 67
3.1.1 Call up of objects................................................................................................. 68
3.1.2 Triggers................................................................................................................ 69
3.1.3 Status messages................................................................................................. 70
3.1.4 Error messages................................................................................................... 73
3.2 Remote control commands....................................................................................... 77
3.2.1 Overview.............................................................................................................. 77
3.2.2 Description of the remote control commands.................................................... 97
3.3 Properties of the RS 232 Interface........................................................................... 126
3.3.1 Handshake ........................................................................................................ 126
3.3.2 Pin Assignment.................................................................................................. 129
3.3.3 What can you do if the data transfer does not work?....................................... 131

Table of contents
785 DMP Titrino
4 Error messages, Troubleshooting...................................................................... 133
4.1 Error and special messages....................................................................................133
4.2 Diagnosis..................................................................................................................138
4.3 Initialize RAM............................................................................................................148
4.4 Releasing a locked spindle with inserted Exchange Unit.......................................149
5 Preparations......................................................................................................... 150
5.1 Setting up and connecting the instruments ............................................................150
5.1.1 Titrino with Stirrer or Titration Stand..................................................................150
5.1.2 Connection of a printer......................................................................................151
5.1.3 Connection of a balance...................................................................................152
5.1.4 Connection of a Sample Changer ....................................................................153
5.1.5 Connection of a computer.................................................................................154
5.1.6 Connection of a Remote Box............................................................................155
5.2 Connection of electrodes, preparing titration vessel...............................................158
6 Appendix .............................................................................................................. 161
6.1 Technical specifications...........................................................................................161
6.2 Pin assignment of the "Remote" socket...................................................................164
6.2.1 Lines of the "Remote" socket during the titration..............................................166
6.2.2 Possible configurations of the activate pulse in SET and CAL........................167
6.3 Titrino validation........................................................................................................168
6.3.1 Electronic tests ..................................................................................................168
6.3.2 Wet tests............................................................................................................168
6.3.3 Maintenance and adjustment of the Titrino......................................................168
6.4 Warranty and certificates..........................................................................................169
6.4.1 Warranty.............................................................................................................169
6.4.2 Certificate of Conformity and System Validation..............................................170
6.5 Scope of delivery and ordering designations..........................................................172
Index ........................................................................................................................ 175

Overview
785 DMP Titrino 1
1 Overview
Front view of instrument: Rear view of instrument:
Remote 1.785
Nr.
E
B
Made by Metrohm
Herisau Switzerland
100 - 240 V
f = 50 - 60 Hz
S = 15 W
Pol
Ref
Ind I
Ind II
Pt 100/1000
Key-
board
C
A
1
A2
RS 232
1
2
3
4
5
6
7
8
9
10
11
12
13

Overview
785 DMP Titrino
2
Front view of instrument:
1Exchange Unit
2Display
3Control keys and indicator lamps on the Titrino
Key < > Power switch
Key < 4> Switching stirrer ON/OFF
Key <DOS> Dosing key. Dispensing is performed as long as
<DOS> is being pressed. Used e.g. to prepare
the Exchange Unit. The dispensing rate can be
set with potentiometer (5).
Key <STOP/FILL> - Stops procedures, e.g. titrations, conditioning.
- Filling after manual dosing with <DOS>.
Key <START> Starts procedures, e.g. titrations, conditioning.
Identical with key <START> of the separate
keypad.
Indicator lamps:
"COND." Lamp flashes when conditioning is performed
and the titration vessel is still wet. It is on if con-
ditioning is ok.
"STATISTICS" Lamp is on when the "statistics" function
(calculation of mean and standard deviation) is
on.
"SILO" Lamp is on when silo memory (for sample data)
is on.
4Setting of display contrast
5Controls the dosing rate during manual dosing with <DOS> and
subsequent filling
6Opening for the memory card

Overview
785 DMP Titrino 3
Rear view of instrument:
7RS232 interfaces
2 separate interfaces for the connection of printer, balance, and com-
puter
8Remote lines (input/output)
for the connection of the Remote Box, Sample Changers, robots etc.
9Connection of electrodes and temperature sensor
• 2 high-impedance measuring inputs for pH and U measurements.
They can either be used separately or for differential potentiometry,
see page 158.
Important: If you work with both measuring inputs in the same ves-
sel, the same reference electrode must be used.
• 1 measuring input for polarized electrodes, e.g. KF electrode
• 1 measuring input for PT100 or Pt1000 temperature sensor
10 Connection for separate keypad
11 Connection for power cable
With power supplies where the voltage is subject to severe HF distur-
bances, the Titrino should be operated via an additional power filter,
e.g. Metrohm 615 model.
12 Connection for stirrer
728 Magnetic Stirrer, 722 Rod Stirrer, 703 or 727 Ti Stand
Supply voltage: 10 VDC (I ≤200 mA)
13 Rating plate
with fabrication, series and instrument number

2.1. Keypad
785 DMP Titrino
4
2 Manual operation
2.1 Keypad
6.2132.070
The third functions (inscriptions in the triangle) on the keys of the keypad are used for
formula entry, see page 38.
SILO
–
9
STATISTICS
EP
7
MEAS/HOLD
+
8
USER
SMPL
DATA
PARAMCONFIG
→
↑
←
CLEAR ENTER
↓
STOP
START
QUIT
CARD
/
6
CAL.DATA
*
5
RS
4
USER METH
)
3
DEF
(
2
C-FMLA
C
1
MODE
;
–
REPORTS
ABC
.
PRINT
MN
0
CONFIG Configuration.
PARAM Parameters.
SMPL DATA Sample data.
STATISTICS ON/OFF switching of statistics calcu-
lations of consecutive determination,
see page 41.
MEAS/HOLDON/OFF switching of measurements
between titrations and hold during ti-
trations.
SILO ON/OFF switching of silo memory for
sample data, see page 60.
CAL.DATA Calibration data, see page 58.
CARD Management of memory card, see
page 55.
C-FMLA Calculation values, see page 40.
DEF Formulas, data output, sequence for
TIP, see page 38ff.
USER METH Management of internal method mem-
ory, see page 53.
PRINT Printing of reports, see page 45.
REPORTS Result output.
MODE Mode selection, see page 13.
USER User name, see page 48.
CURVE Switching result/curve display.
←,→Selection of special values (dialog
marked with ":")
↑,↓Cursor key for navigation.
CLEAR Clears values, set special values.
ENTER Stores values.
STOP Stops methods.
QUIT Quits inquiries, waiting times, printing.
START Starts methods.
CURVE

2.2 Principle of data input
785 DMP Titrino 5
2.2 Principle of data input
• If you press a key you will find a group of inquiries in
the display.
Example key <CONFIG>:
In the first line you see where you are: You pressed
key <CONFIG> and you are now in the inquiries
"configuration".
• The cursor is inverted. In our example the cursor is
on the inquiry ">monitoring". You can move the cur-
sor up and down with keys <↑> and <↓>.
• If a dialog text is marked with ">", it contains a
group of inquiries itself. You go to this group press-
ing <ENTER>.
Example inquiries of "peripheral units":
The first two lines indicate again where you are.
Then you find the inquiries.
If a dialog text of an inquiry is marked with ":", you
can select a value with keys <←> and <→>
(forward/backward).
• A value is stored with <ENTER> and the cursor
moves to the next inquiry.
• With key <QUIT> you move one level up, in our ex-
ample you go back to ">peripheral units".
If you press <QUIT> once more you quit the in-
quiries in "configuration" altogether.
• If you can scroll, ↓or ↑appear in the right lower or
upper corner of the display.
configuration
>monitoring
>peripheral units
>auxiliaries
>RS232 settings COM1
>RS232 settings COM2
>common variables
configuration
>peripheral units
send to COM1: IBM
send to COM2: IBM
man.reports to COM: 1
balance: Sartorius
stirrer control: OFF
remote box: OFF
configuration
>monitoring
>peripheral units
>auxiliaries
>RS232 settings COM1
>RS232 settings COM2
>common variables

2.3. Text input
785 DMP Titrino
6
2.3 Text input
<CLEAR>
<QUIT>
<ENTER>
Example storing a method:
• Press key <USER METH>.
Place the cursor to ">store method" and press
<ENTER>.
The name of the method which is currently in the
working memory is displayed.
• Delete this name with <CLEAR>.
• Open the "text writing mode" with key <ABC>.
You can now select the desired character by means
of the cursor keys, then confirm this character. Se-
lect the next character...
When you confirmed the last character, i.e. your
name is complete, you quit the text writing mode
with <QUIT>.
Confirm now the name with <ENTER>.
• During text input you can correct typing errors with
<CLEAR>:
<CLEAR> deletes the characters one by one.
• If you wish to modify an existing name (e.g. if you
have names like Text 1, Text 2, Text 3), do not de-
lete the existing name before you start the text input
mode. Proceed then as follows:
1. Press <USER METH>, place the cursor to
">store method" and press <ENTER>.
2. Open the text writing mode directly: Press key
<ABC>.
3. <CLEAR> now deletes the characters one by
one or you can add additional characters.
4. If your text is complete, leave the text writing
mode with <QUIT> and confirm the text with
<ENTER>.
REPORTS
ABC
.
user methods
>store method:
method name:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
µ°!"#$&'()*+,-./ 0123456789
user methods
>store method
method name: Text
user methods
>store method
method name: ********

2.4 Configuration, key <CONFIG>
785 DMP Titrino 7
2.4 Configuration, key <CONFIG>
Key <CONFIG> serves to enter device specific data.
The set values apply to all modes.
monitoring:
Monitoring of instrument validation, pH calibration,
service interval and printout of diagnostic report.
peripheral units:
Selection of printer, balance, stirrer control and COM
for manual report output.
auxiliaries:
e.g. setting of dialog language, date time, type of result
display.
RS232 settings COM1 and 2:
RS parameters for the COM's.
common variables:
Values of common variables.
The display texts of the Titrino are shown to the left.
The values are the default values.
>monitoring
validation: OFF
time interval 365 d
time counter 0 d
calibration: OFF
meas.input: 1
time interval 7 d
time counter 0 d
Monitoring functions
Monitoring the validation interval (ON, OFF)
Monitoring is carried out at the end of the titrations and
when the Titrino is switched on. If the monitoring
responds the message "validate instrument" appears.
The message vanishes with <CLEAR>. At the same
time the counter is reset to zero.
If "on" has been set:
Time interval for validation (1...9999 d)
see also page 168.
Time counter (0...9999 d)
Counts the number of days since the last time the
counter was reset.
Monitoring the pH calibration interval (ON, OFF)
Monitoring is carried out at the end of the titrations and
when the Titrino is switched on if the measuring input
has a current calibration date. If the monitoring
responds the message "calibrate electrode" appears.
The counter will be reset to zero on the next pH
calibration of this input.
If "on" has been set:
Measuring input (1, 2, diff.)
Time interval for validation (1...9999 d)
Time counter (0...9999 d)
Counts the number of days since the last time the
counter was reset.
CONFIG
configuration
>monitoring
>peripheral units
>auxiliaries
>RS232 settings COM1
>RS232 settings COM2
>common variables

2.4. Configuration, key <CONFIG>
785 DMP Titrino
8
service: OFF
next service YYYY-MM-DD
system test report: OFF
Monitoring the service interval (ON, OFF)
Monitoring is carried out after the Titrino has been
switched on. If the monitoring responds the message
"Service is due" appears. The message vanishes with
<CLEAR>.
If "on" has been set:
Date of next service (YYYY-MM-DD)
System test report printout (ON, OFF)
With "on" the report of the system test is printed out
after the Titrino has been switched on, see also page
168.
>peripheral units
send to COM1: IBM
send to COM2: IBM
man.reports to COM: 1
balance: Sartorius
stirrer control: OFF
Settings for peripheral units
Selection of printer (Epson, Seiko, Citizen, HP, IBM) at
the Titrino COM1
"Epson", for Epson
"Seiko", e.g. for DPU-414
"Citizen", e.g. for iDP 562 RS
"HP" e.g. for Desk Jet types. Place curves always at the
beginning of a page as you cannot have them over 2
pages.
"IBM" for all printers with IBM character set Table 437
and IBM graphics, as well as for the data transmission
to a computer or a data system.
COM of Titrino for the output of manually triggered
reports (1, 2, 1&2)
Manually triggered reports e.g. with <PRINT> .... .
Exception <PRINT><REPORTS>: These reports are
outputted on the COM as defined in the method.
Selection of balance (Sartorius, Mettler, Mettler AT,
AND, Precisa)
Sartorius: Models MP8, MC1
Mettler: Models AM, PM and balances with 011,
012, and 016 interfaces
Mettler AT: Model AT
AND: Models ER-60, 120, 180, 182, FR-200, 300
and FX-200, 300, 320
Precisa: Models with RS232C interface
Automatic switching ON/OFF of the stirrer in the titration
sequence (ON, OFF)
If stirrer control is ON, the stirrer will be switched on at
the beginning and switched OFF at the end of a de-
termination. For SET with conditioning the stirrer will be
switched off in the inactive state.
In the modes MEAS, CAL, and TIP the stirrer is not
switched automatically.
For stirrer control the red switch on the stirrer unit must
be ON.

2.4 Configuration, key <CONFIG>
785 DMP Titrino 9
remote box: OFF
keyboard: US
barcode: input
Connection of a remote box (on ,OFF)
To the remote socket for PC keyboard and barcode
reader, see page 155.
If "on" has been set:
Type of PC keyboard (US, German, French, Spanish,
Swiss.)
The PC keyboard is used as an input aid, see page
156.
Target for barcode reader (input, method, id1, id2, id3,
smpl size)
The barcode reader is used as an input aid, see page
155.
Input: The barcode string goes to the entry field in
which the cursor is currently located.
Method: The barcode string goes to the entry field
"Methods" in the silo memory.
Id1: The barcode string goes to the entry field
"Id1". (Similar for Id2 and Id3.)
Smpl size: The barcode string goes to the entry
field "smpl size".
>auxiliaries
dialog: english
date 1998-04-23
time 08:13
run number 0
auto start OFF
start delay 0 s
result display: bold
General settings
Selection of dialog language (english, deutsch,
francais, español, italiano, portugese, svenska)
Current date (YYYY-MM-DD)
Format: Year-month-day, entry with leading zeros.
Current time (HH-MM)
Format: Hours-minutes, entry with leading zeros.
Current run number for result output (0...9999)
The sample number is set to 0 when the instrument is
switched on and incremented on every determination.
Automatic starts of titrations. (1...9999, OFF)
Number of automatic starts ("number of samples").
Used for instrument interconnections in which the
external instrument does not initiate a start. Not
advisable in connections with Sample Changers.
Start delay (0...999 999 s)
Delay time after start of methods. Abort start delay time
with <QUIT>.
Type of result display at the end of the determination
(bold, standard)
bold: The calculated results are displayed in bold
characters.
standard: Displays the whole information, e.g. results,
endpoints, messages etc.

2.4. Configuration, key <CONFIG>
785 DMP Titrino
10
dev.label.
program 785.0010
Individual identification of devices (up to 8 ASCII
characters)
Will be printed in the result report, see page 45.
Display of program version
>RS232 settings COM1
baud rate: 9600
data bit: 8
stop bit: 1
parity: none
handshake: HWs
Settings of RS232 interface
see also page 126. Identical for COM2.
Baud rate (300, 600, 1200, 2400, 4800, 9600, 19200,
38400, 57600, 115200)
Data bit (7, 8)
Stop bit (1, 2)
Parity (even, odd, none)
Handshake (HWs, SWline, SWchar, none)
see page 126.
>common variables
C30 0.0
etc.
Values of the common variables
Common variables C30...C39 (0.. ±999 999)
The values of all common variables are displayed. For
creating of common variables see page 43.

2.4 Configuration, key <CONFIG>
785 DMP Titrino 11
Settings with key <CONFIG> and power ON
Proceed as follows:
1. Switch the Titrino OFF.
2. Press <CONFIG> and keep it pressed during switching the Titrino ON.
The display shows the following:
lock:
Locking keys <CONFIG>, <PARAM> and <SMPL
DATA>, and the functions "recall method", "store
method" and "delete method" of the internal method
memory in the Titrino.
curve:
Changes the appearance of the curve printout.
>lock
<configuration>: OFF
<parameters>: OFF
<smpl data>: OFF
recall method: OFF
store method: OFF
delete method: OFF
lock
"ON" means that the corresponding function is not
accessible anymore.
The corresponding key is locked.
The corresponding function in the internal method
memory of the Titrino is locked.
Setup
>lock
>curve

2.4. Configuration, key <CONFIG>
785 DMP Titrino
12
>curve
grid: ON
frame: ON
scaling: Full
width 0.75
length 0.1
curve
The settings are valid for COM1 and COM2.
If you change the printer type, the following settings are
initialized according to the printer.
Grid drawing (ON, OFF)
Frame drawing (ON, OFF)
Type of scaling (Full, Auto)
Full: The scaling goes from the greatest to the smallest
value.
auto: The scaling from tick to tick, e.g. the
smallest/greatest values lie in between the first/last tick.
Width (0.2...1.00)
1 is greatest width. If you set 1 you may loose the label
at the right margin.
Length (0.01...1.00)
Volume axis Curve length per cylinder volume
0.01 100 cm
0.1 10 cm
0.5 2 cm
11 cm
Time axis:Curve length
0.01 100 cm
0.1 10 cm
0.5 2 cm
11 cm

2.5 Selection of the mode, key <MODE>
785 DMP Titrino 13
2.5 Selection of the mode, key <MODE>
Press key <MODE> until the desired mode is
displayed and confirm with <ENTER>.
Select the measured quantity pH, U, Ipol, Upol, (T) with
<←> or <→> and confirm it also with <enter>.
The following modes can be selected:
• DET: Dynamic Equivalence-point Titration
• MET: Monotonic Equivalence-point Titration
• SET: Set Endpoint Titration.
• CAL: pH Calibration.
• MEAS: Measuring.
• TIP: Titration Procedure. Linking of various
commands and methods to a titration procedure.
These standard modes are equipped with a set of
standard parameters. They only need few settings in
order to be ready to work.
TIP is an empty "shell". The TIP sequence has to be
defined with <DEF>, see page 49.
You will find a survey of the modes in the short
Instructions for use, page 10.
MODE
;
–
mode
mode: DET
measured quantity: pH

2.6. Parameters, key <PARAM>
785 DMP Titrino
14
2.6 Parameters, key <PARAM>
The key <PARAM> is used for the entry of values that
determine the modes. Values marked with "cond." are
accessible during the conditioning in the SET mode.
"**titr." means that these values can be changed dur-
ing the titration. They influence the ongoing determina-
tion. Other values can only be changed in the inactive
state.
The display texts of the Titrino are shown to the left.
The values are the default values.
2.6.1 Parameters for DET and MET
titration parameters
determine the course of the titration and measured
value acquisition.
stop conditions:
Parameters for the automatic termination of the titra-
tion.
statistics:
Calculation of mean values and standard deviation,
see page 41.
evaluation:
Parameters for the evaluation of EP's, fix EP's, and
pK/HNP.
preselections:
ON/OFF of various auxiliary functions such as auto-
matic requests after the start and activate pulse.
>titration parameters
meas.pt.density 4
DET
min.incr. 10.0 ul
DET
V step 0.10 ml
MET
General titration parameters
Measuring point density (0...9)
0 means highest density, 9 lowest. Selection of the
meas.pt.density, see page 20.
Minimum increment (0...999.9 uL)
The increment is dispensed at the beginning of the
titration and in the region of the equivalence point.
Size of volume increment (0...9.999 mL)
Dosing step. Small volume increments are needed to
determine blank values or to assure accuracy with
highly unsymmetrical curves. Selection of size of the
increment, see page 20.
PARAM
parameters
>titration parameters
>stop conditions
>statistics
>evaluation
>preselections

2.6 Parameters, key <PARAM>
785 DMP Titrino 15
dos.rate max. ml/min
**titr.
signal drift 50 mV/min
**titr.
equilibr.time 26 s
**titr.
start V: OFF
start V 0.0 ml
factor 0
dos.rate max. ml/min
**titr.
Dosing rate for volume increments (0.01...150 mL/min,
max.)
<CLEAR> sets "max.".
The maximum rate depends on the Exchange Unit:
Exchange Unit max.
5 mL 15 mL/min
10 mL30 mL/min
20 mL 60 mL/min
50 mL 150 mL/min
Drift criterion for measured value acquisition. (input
range depends on the measured quantity:
pH, U, Ipol: 0.5...999 mV/min, OFF
Upol: 0.05...99.9 uA/min, OFF)
<CLEAR> sets "OFF".
This type of measured value acquisition is often called
an equilibrium titration.
"OFF" means that the measured value is acquired after
an equilibration time. This may be useful for slow
titration reactions or when the response of the
electrode assembly is slow.
Waiting time for measured value acquisition. (0...9999 s,
OFF)
<CLEAR> sets "OFF".
If no new equilibration time has been entered, the
Titrino calculates an equilibration time appropriate to
the drift, see page 19. The measured value is acquired
as soon as the first criterion (drift or time) has been
met.
Type of start volume (OFF, abs., rel.)
"OFF": start volume switched off
"abs": absolute start volume in mL
"rel.": relative start volume to sample size.
If "abs." is set:
Absolute start volume (0...999.99 mL)
If "rel." is set:
Factor for relative start volume (0...±999 999).
Calculated as: start V in mL = factor * sample size
Dosing rate for start volume (0.01...150 mL/min, max.)
<CLEAR> sets "max.".
Maximum rate depends on the Exchange Unit:
Exchange Unit max.
5 mL 15 mL/min
10 mL 30 mL/min
20 mL 60 mL/min
50 mL 150 mL/min

2.6. Parameters, key <PARAM>
785 DMP Titrino
16
pause 0 s
**titr.
meas.input: 1
I(pol) 1 uA
U(pol) 400 mV
electrode test: OFF
temperature 25.0 °C
Waiting time (0...999 999 s)
Waiting time, e.g. for equilibration of the electrode after
the start or reaction time after dosing of start volume.
The pause can be aborted with <QUIT>.
Measuring input for pH and U (1, 2, diff.)
Request for measuring input for pH and U.
Measuring input 1 or 2 or differential amplifier;
connection of electrodes, see page 158.
With polarized electrodes, instead of the measuring
input the
polarization current (-127...127 uA)
or the
polarization voltage (-1270...1270 mV, in steps of 10
mV)
is inquired.
Electrode test (OFF, ON)
Test for polarized electrodes. Performed on
changeover from the inactive standby state to a
measurement. "OFF" means that the test is not
performed.
Titration temperature (-170.0...500.0 °C)
The temperature is continuously measured if a T
sensor is connected. This parameter is used for
temperature compensation in pH titrations.
>stop conditions
stop V: abs.
**titr.
stop V 99.99 ml
**titr.
factor 999999
**titr.
stop pH OFF
**titr.
Stop conditions for the titration
If several stop conditions have been set, the criterion
which is met first applies.
Type of stop volume (abs., rel., OFF)
"abs.": absolute stop volume in mL.
"rel.": relative stop volume to sample size.
"OFF": stop volume switched off. Stop volume is not
monitored.
If "abs." is set:
Absolute stop volume (0...9999.99 mL)
If "rel." is set:
Factor for relative stop volume (0...±999 999)
Calculated as: Stop V in mL = factor * sample size
Stop at measured value (input range dependent on
measured variable:
pH: 0... ±20.00, OFF
U, Ipol: 0... ±2000 mV, OFF
Upol: 0... ±200.0 uA, OFF)
<CLEAR> sets "OFF".
"OFF" means that the criterion is not monitored.

2.6 Parameters, key <PARAM>
785 DMP Titrino 17
stop EP 9
**titr.
filling rate max. ml/min
**titr.
Stop after a number of EP's have been found (1...9,
OFF)
<CLEAR> sets "OFF".
"OFF" means that the criterion is not monitored.
Filling rate (0.01...150 mL/min, max.)
<CLEAR> sets "max.".
The maximum rate depends on the Exchange Unit:
Exchange Unit max.
5 mL 15 mL/min
10 mL 30 mL/min
20 mL 60 mL/min
50 mL 150 mL/min
>evaluation
EPC 5
EP recognition: all
low lim.1 pH -20.00
up lim.1 pH 20.00
EP evaluation/recognition
See page 20 ff.
Equivalence point criterion (input range depends on
mode.
For DET:
0...200
For MET:
pH: 0.10...9.99
U, Ipol: 1...999 mV
Upol: 0.1...99.9 uA)
Threshold for the size of the jump, see page 22.
Recognition of EP's which fulfill the EP criterion. (all,
greatest, last, window, OFF)
Selection of equivalence point recognition:
"all": All equivalence points are recognized.
"greatest": Only the greatest (steepest) equivalence
point is recognized.
"last": Only the last equivalence point is
recognized.
"window": Only EP's in specified windows are
recognized.
"OFF": Evaluation switched off.
If "window" is selected, lower and upper limits of
windows are inquired.
Lower limit of window 1
and
upper limit of window 1
(Input ranges for both inquiries depend on the
measured quantity):
pH: 0...±20.00, OFF
U, Ipol: 0...±2000 mV, OFF
Upol: 0...±200.0 uA, OFF)
<CLEAR> sets "OFF".
Only equivalence points are recognized which lie within
the set lower and upper limits. The equivalence point
numbering is defined with the windows, see page 22.
Window inquiries continue until the lower limit is set to
"OFF". Up to 9 possible windows.
Always set both limits to ≠OFF for a valid window.