Metrohm 799 GPT Titrino User Manual
799 GPT Titrino, Short instructions for use
CH-9101 Herisau/Switzerland
E-Mail info@metrohm.com
Internet www.metrohm.com
799 GPT Titrino
Short Instructions for Use
8.799.1023 04.2002 / pkl
799 GPT Titrino, Short instructions for Use
Table of contents
1. Getting started .........................................................................1
1.1 Principle of data input ...........................................................2
1.2 Development of a method.....................................................3
1.3 Storing methods....................................................................7
1.4 Working with several dosing units ...................................... 10
2. Titration, dosing and measuring modes...............................12
2.1 Survey of the titration modes .............................................. 12
2.2 Mode DET and MET, parameters .......................................14
2.3 Mode SET, parameters .......................................................15
2.4 Mode KFT, parameters........................................................ 16
2.5 Mode STAT, parameters .....................................................17
2.6 Mode DOS, parameters ......................................................19
2.7 Mode DOC, parameters ......................................................20
2.8 Mode MEAS and CAL, parameters ..................................... 21
2.9 Mode TIP, parameters.........................................................22
2.10 Calculations ....................................................................... 23
3. Other functions ......................................................................25
3.1 Method memory ..................................................................25
3.2 User name, key <user> ..................................................... 27
3.3 Sample data, keys <smpl data> and <silo>.................... 27
3.4 Configuration, key <configuration>................................... 28
Index...........................................................................................30
1.1 Principle of data input
799 GPT Titrino: Getting started
1
Summary of the most important signs
Signs in the Titrino dialog:
> Title of inquiry groups. Press <ENTER> to go to
the inquiries.
: Values can be chosen with keys <←> or <→>.
Signs that are used in the instructions for use
<> sign for "key", e.g. <ENTER> or <←>.
1.1 Principle of data input
799 GPT Titrino: Getting started
2
1 Getting started
This is a step by step introduction into the operation of
the Titrino.
You learn how to go round with the Titrino and you get
an idea of the possibilities that the Titrino offers you.
1.1 Principle of data input
<CONFIG>
<↓>
<ENTER>
<←> or <→>
<ENTER>
2 x <QUIT>
Press <STOP> if the Titrino is busy. It is now in the inactive standby state.
Then press the <CONFIG> key.
The first line indicates the "path", which means the place
where you are right now: You pressed the <CONFIG>
key and are now in the "configuration" inquiries.
In the next lines you find a list of the inquiry groups of
key <CONFIG>. They are all marked with ">". This sign
means that you get to the inquiries with <ENTER>.
The inquiry group ">monitoring" is inverted, which
means that the cursor is placed on this line. You can
move the cursor up and down with the <↑> and <↓>
keys.
Set the cursor to ">auxiliaries" and open this inquiry
group with <ENTER>.
The arrow in the lower right corner means that there are
more inquiries. They appear if you move the cursor below.
Set the cursor to the inquiry "dialog:". You may select a
different dialog language with the keys <←> or <→>
(Key <→> "turns" forward, <←> backward).
Select any language and press <ENTER>.
Note the sign ":" in the text "dialog:". If you see this sign
in the dialog text you can always use the <←> or <→>
keys to select a value.
Readjust the language to "english" again.
Quit the inquiries in the <CONFIG> key pressing
<QUIT> twice.
configuration
>auxiliaries
dialog: english
date 2002-04-08
time 15:23
run number 0
auto start OFF
start delay 0 s ↓
configuration
>monitoring
>peripheral units
>auxiliaries
>RS232 settings COM1
>RS232 settings COM2
>common variables
>prep.dosing elements
1.2 Development of a method
799 GPT Titrino: Getting started
3
1.2 Development of a method
You learn how to elaborate a method .
First you select a titration mode. A general survey of the
different titration modes is given on page 12.
Selecting the mode
<MODE>
<←> or <→>
<ENTER>
<START>
<STOP>
Press the <MODE> key.
Select the mode DET with <←> or <→> keys, press
<ENTER>, select the measured quantity "pH" and press
<ENTER> again.
DET stands for Dynamic Equivalence point Titration. In
this titration, the size of the volume increments vary as a
function of the slope of the titration curve. After each
increment, a preset measured value drift (or time) is
awaited until the next increment is added (so called
"equilibrium titration"). After the titration, the equivalence
points are evaluated automatically.
You are now ready to titrate. You titrate with the internal
dosing unit D0, i.e. the Exchange Unit on the Titrino.
Mount an Exchange Unit with NaOH, c=0.1 mol/L on the
Titrino.
Plug a combined pH glass electrode into measuring
input ("Ind I").
Pipette 2 mL HCI, c =0.1 mol/L into the titration vessel,
dilute it with ca. 20 mL. dist. water, adjust the stirrer and
press <START>.
During the titration the titration curve is displayed. To the
left of the curve, the current measured values (pH and
volume) are displayed.
As soon as the Titrino has found an equivalence point, it
will also be shown the left.
Let the titration continue for a short while, e.g. until ca.
pH=11.50. Now stop it with <STOP>.
The equivalence point is displayed.
DET pH D0a ********
mode
mode: DET
measured quantity: pH
DET pH D0a ********
EP1 2.083 ml pH 7.64
1.2 Development of a method
799 GPT Titrino: Getting started
4
Calculation of the result, entry of a formula
<DEF>
<ENTER>
<1>
<ENTER>
2 x <QUIT>
You may calculate results with the equivalence point.
Press <DEF>.
Press <ENTER> to move on to the formula entry. The
display now shows "RS? ".
Press "1", i.e. the first formula.
You can now enter a formula. Note here the inscriptions
in the right corner of the keys and the numbers.
You can use mathematical operations, parentheses as
well as the following symbols:
EP# EP’s with 1-digit number, e.g. EP1.
RS# Previously calculated results, e.g. RS1 in the sec-
ond formula.
C## Calculation values, e.g. C01. C00 is reserved for
the sample size. The meaning of the different cal-
culation values is given on page 24.
Calculate the content of your hydrochloric acid in g/L:
RS1=EP1*C01*C02/C00
EP*conc(titrant)*molar mass/sample size
If you made a typing mistake, you can delete the symbols one by one with <CLEAR>.
Confirm the formula with <ENTER>.
You may enter a text for the result output, see page 7.
Enter the desired number of decimal places for the result.
Select the unit g/I with <←> or <→> or enter a text as
unit.
Quit the formula entry by pressing <QUIT> twice.
Instead of the equivalence point, the calculates result will
be displayed. It is 0 because the calculation values C01
and C02 are still zero.
Entry of the calculation constants
<C-FMLA>
Press <C-FMLA>, to enter the calculation values.
The constants which have been used in the formula are
requested:
C01: Concentration of your titrant = 0.1 mol/L
C02: Molar mass of HCI = 36.47 g/mol
The result is recalculated.
def
>formula
RS1=EP1*C01*C02/C00
RS1 text RS1
RS1 decimal places 2
RS1 unit: g/l
RS1 limit control: OFF
def
>formula
RS1=EP1*C01*C02/C00
def
>formula
>silo calculations
>common variables
>report
>mean
>temporary variables
C-fmla
C01 0.0
C02 0.0
1.2 Development of a method
799 GPT Titrino: Getting started
5
Entry of the sample size
<SMPL DATA>
You also need the sample size for the calculation of your
result. Enter it with the <SMPL DATA> key:
Place the cursor to "smpl size" and enter 2.
Select the unit "ml" for the sample size using the <←>
or <→> keys and confirm with <ENTER>.
The result is recalculated.
Viewing the titration curve
<←> or <→>
<←> or <→>
You can view the titration curve after the titration using
the <←> or <→> keys.
With the <↑> and <↓> you can trace the curve. To the
left the measured values of the current point are dis-
played. On the first line you will find the index of the
point.
At the equivalence point, you find its ERC (see Instruc-
tions for Use page 21, 22) and its volume.
Quit the curve display with <←> or <→> key.
Selection of the automatic report output
<DEF>
<↓>
<ENTER>
<←> or <→>
<ENTER>
2 x <QUIT>
If you have a printer connected, you can select the re-
port blocks to be printed out automatically at the end of
the titration.
Press <DEF> and place the cursor to ">report".
Press <ENTER> to define the report output.
(If you have your printer connected to COM2 press
<ENTER> once again.)
Select the individual report blocks with the <←> or
<→> keys. Use a ";" as delimiter between the report
blocks. If you wish to print out a curve and a full result
report, set "curve;full".
Confirm the entry with <ENTER> and quit the inquiries
with <QUIT>
smpl data
id#1 or C21
id#2 or C22
id#3 or C23
smpl size 1.0 g
smpl unit: g
def
>report
report COM1:curve;full
1.2 Development of a method
799 GPT Titrino: Getting started
6
Press <PRINT> <REPORTS> <ENTER> to print your reports. Your printout will look as follows:
Identification of report type (cu = curve)
Start volume and method identification
Scaling of curve axis
Instrument type with identification and program version
Initial pH
Volume and pH value of EP1
Calculated result
Entry of a stop criterion
<PARAM>
<↓>
<ENTER>
Entries <ENTER>
2 x <QUIT>
You don't want to stop your titration manually each time.
Let us enter an automatic stop criterion.
Press <PARAM> and place the cursor to ">stop conditions". Press <ENTER> to go to this inquiry group.
The absolute stop volume. It can be used as a safety
volume to prevent overflow of the titration vessel.
Enter a value for the stop volume that appears suitable
for your titration vessel.
Set the pH value, e.g. 11.5 as stop criterion.
If several stop criteria have been set, the one that is
reached first, applies.
Confirm the input with <ENTER> and quit the inquiry
with <QUIT>.
Try another titration with this method.
parameters
>stop conditions
stop V: abs.
stop V 99.99 ml
stop pH aus
stop EP 9
filling rate max. ml/min
'cu
799 GPT Titrino 01102 799.0010
date 2002-04-08 time 09:07 1
Start V 0.000 ml DET pH ********
1.0 ml/div dpH=2.0/div
−−−−−−−−−−−−−−−−
'fr
799 GPT Titrino 01102 799.0010
date 2002-04-08 time 09:07 1
pH(init) 2.88 DET pH ********
smpl size 2 ml
EP1 2.083 ml 7.64
RS1 3.80 g/l
manual stop
−−−−−−−−−−−−−−−−
1.3 Storing methods
799 GPT Titrino: Getting started
7
1.3 Storing methods
You learn how to operate the method memories.
The Titrino offers 2 types of method memories:
• Internal method memory, key <USER METH>
• External method memory on the card, key <CARD>
Storing a method in the internal method memory
<USER METH>
<↓>
<ENTER>
Entries <ENTER>
<QUIT>
<ENTER>
Press <USER METH>, place the cursor to ">store
method" and press <ENTER>.
Press <CLEAR> to delete the existing method name
(********).
Open text entry with key <ABC>.
A field with letters and symbols appears. You can select
a letter with the cursor keys and confirm this letter with
<ENTER>. The letter then appears in the input field of
the method name.
Enter an identification for your method, e.g. HCl:
If you made a typing error you can delete the characters
one by one with <CLEAR>.
Quit the text input with <QUIT> when you completed
your name.
Confirm the name with <ENTER>. The method will be
stored in the internal method memory.
The method runs now under the identifier "HCl".
A list of contents of the method memory can be printed
with the key sequence <PRINT><USER
METH><ENTER>.
'um
799 GPT Titrino 01102 799.0010
date 2002-04-08 time 07:49
user methods bytes
DET pH Titer_pH D0 190
DET U Blank D0 178
DET U Chloride D0 234
MET U Diazo D0 208
MET Ipol Br-Index D0 226
DET U Perox.No D0 172
DET pH HCl D0 108
remaining bytes 98684
------------
mode and
meas.quantity
method
name
dosing unit, that
is being used
user methods
>store method
method name:
ABCDEFGHIJKLMNOPQRSTUVWXYZ
abcdefghijklmnopqrstuvwxyz
µ°!"#$&'()*+,-./ 0123456789
1.3 Storing methods
799 GPT Titrino: Getting started
8
Recall a method from the internal method memory
<USER METH>
<ENTER>
<←> or <→>
<ENTER>
Stored methods can always be recalled into the working
memory.
Press <USER METH> and <ENTER> to go to ">recall
method".
You can select a method with <←> or <→> or enter its
name directly.
Recall the method with <ENTER>.
The method is now ready to work.
Method memory on the card
The card offers additional memory space for methods. It
may be used e.g.
• as a backup-medium for the internal method memory
• as an extended method memory, where the methods
can be organized in various directories
• if every user wants to store his methods on his own
card
• for exchanging methods between various laboratories, apparatus, and/or users
The card has a battery, which should be exchanged periodically, see page 91 of the Instructions for Use.
As an example, perform a backup from the internal
method memory to the card. If the card is not formatted,
see page 91 of the Instructions for Use.
<CARD>
<↓>
<ENTER>
<←> or <→>
<ENTER>
Press <CARD> and place the cursor to ">backup".
Confirm this function with the key <ENTER> and give a
name for the backup directory.
If you wish to overwrite an existing directory, choose a
name with <←> or <→>. Then press <ENTER>
The backup will be effected.
user methods
>recall method
method name: ********
user meth.
>backup
dir.name: Backup
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