Metrohm 730 Sample Changer User Manual Page 56

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3.6 User Methods
730 Sample Changer, Introduction
53
3.6 User Methods
The following pages contain the listing of user methods included with the instrument
with explanations of the important commands. A prerequisite for the use of these
methods is a correct configuration. In particular, for each sample rack used, the work
position, rinse position, shift position, special position, rack code and type as well as a
special beaker must be defined.
The specific titration or measurement method must be set in each case on the appro-
priate instrument. The correct cable connections can be found on page 14ff. For these
examples it is assumed that the measuring instruments are connected to the remote
control socket.
It is recommended to work through every new method step-by-step with the TRACE
function, making adjustments where necessary, before starting the method for the first
time.
The methods 760_1 to 760_4 can be deleted, if additional memory is required (see
page 93).
Method: Titrino
This is the most universal method for titrations with a Titrino and the 730 Sample
Changer. It may serve as a model for additional methods.
730 Sample Changer 0120/02 187 730.0013
parameters
method Titrino
number of samples: rack
>start sequence
1 CTL:Rm: INIT
>sample sequence
1 MOVE 1 : sample
2 LIFT: 1 : work mm
3 STIR: 1 : ON s
4 CTL:Rm: START device1
5 SCN:Rm : End1
6 STIR: 1 : OFF s
7 LIFT: 1 : rinse mm
8 PUMP 1.1 : 2 s
9 WAIT 5 s
>final sequence
1 MOVE 1 : spec.1
2 LIFT: 1 : work mm
>changer settings
rack number 0
lift rate 1 25 mm/s
lift rate 2 25 mm/s
shift rate 20
shift direction: auto.
beaker test mode: single
on beaker error: MOVE
>stirring rates
stirrer 1 3
stirrer 2 3
stirrer 3 3
stirrer 4 3
>dosing unit def.
>manual stop
CTL Rmt: STOP device1
CTL RS232:
------------
- report header with instrument identification and program
version
- method name
- number of samples to be processed (entire sample rack)
- initialize remote interface
- place first sample under lift 1
- place titration head at work position
- switch on stirrer 1
- start e.g. Titrino
- wait for end of titration
- switch off stirrer 1
- place titration head at rinse position
- rinse electrode for 2 sec
- let drip for 5 sec
- place conditioning beaker under lift 1
- immerse electrode
——— Settings for changer functions ———
- if a sample beaker is missing, the next one is automatically
selected
——— Stirring speeds ———
——— Settings for dosing instruments ——— (none)
——— Reaction to manual stop ———
- stop device 1
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