Metrohm 730 Sample Changer - Manuel (Page 59)

3.6 User Methods
730 Sample Changer, Introduction 56
Method: prepare
This method shows the operating process when an auxiliary solution is to be added to
several samples before the titration. A Titrino and a 665 or 725 Dosimat are required
for this. Both are to be connected with the sample changer using the 6.2141.040 cable.
The volume to be added must be set on the Dosimat.
730 Sample Changer 0120/02 187 730.0013
parameters
method prepare
number of samples: 9
>start sequence
1 CTL:Rm: INIT
2 MOVE 1 : sample
3 LIFT: 1 : rinse mm
4 CTL:Rm: START dos1
5 WAIT 4 s
6 SAMPLE: + 1
7 MOVE 1 : sample
8 LIFT: 1 : rinse mm
9 CTL:Rm: START dos1
10 WAIT 4 s
11 SAMPLE: – 1
12 MOVE 1 : sample
13 LIFT: 1 : work mm
14 STIR: * : ON s
15 WAIT 40 s
16 CTL:Rm: START device1
17 SCN:Rm : Ready1
18 STIR: * : OFF s
19 LIFT: 1 : rinse mm
20 PUMP 1.1 : 3 s
21 WAIT 5 s
>sample sequence
1 SAMPLE: + 1
2 MOVE 1 : sample
3 SAMPLE: + 1
4 MOVE 1 : sample
5 LIFT: 1 : rinse mm
6 CTL:Rm: START dos1
7 WAIT 4 s
8 SAMPLE: – 1
9 MOVE 1 : sample
10 LIFT: 1 : work mm
11 STIR: * : ON s
12 CTL:Rm: START device1
13 SCN:Rm : Ready1
14 STIR: * : OFF s
15 LIFT: 1 : rinse mm
16 PUMP 1.1 : 3 s
17 WAIT 5 s
>final sequence
1 SAMPLE: + 1
2 MOVE 1 : sample
3 LIFT: 1 : work mm
4 STIR: 1 : ON s
5 CTL:Rm: START device1
6 SCN:Rm : Ready1
7 STIR: 1 : OFF s
8 LIFT: 1 : rinse mm
9 PUMP 1.1 : 3 s
10 WAIT 4 s
11 MOVE 1 : spec.1
12 LIFT: 1 : work mm
>changer settings
…
- 9 samples, effective number of samples – 2 (here using
the 12-place rack and 1 special beaker)
- first sample in front of tower 1
- lift in rinse position
- start dosing
- waiting time for Dos. must be adjusted (LEARN!)
- raise sample position by 1
- next sample in front of tower 1
- dosing
- waiting time
- lower sample position by 1
- first sample in front of tower 1
- lift in work position
- stirrer on
- waiting time
- start titration
- wait for end of titration (static 'ready'-line)
- switch off stirrer
- rinse electrode
- raise sample position by 1
- next sample in front of tower 1
- raise sample position by 1
- next sample in front of tower 1
- lift in work position
- start dosing
- waiting time for dosing
- lower sample position by 1
- next sample in front of tower 1
…
- start titration
- wait for end of titration
…
——— process last sample ———
…
- place conditioning beaker
- immerse electrode
see method "Titrino"
Remark: The first and last samples must be specially treated in the start and end se-
quences, respectively.