Metrohm 711 Liquino - Manual (Page 116)

4.8 SMPL mode - fully automatic sampling
711 Liquino, Instructions for use 110
4.8.1 Sampling process in detail
The SMPL mode procedure is laid down. It can be adapted to existing peripheral units.
Aspirate measuring cell
empty
cylinder
aspirate
air bubble
aspirate
meas. cell
start
sample changer START >>
• The dosing cylinder is emptied. Its contents are dis-
charged into the waste bottle (at port 4).
•
If a sample changer is used (with 'Changer start on'),
then this will receive a start signal (with a remote con-
nection) or a start command (with an RS232 connec-
tion).
• A separating bubble is aspirated. If 'Manual sampling'
is set (e.g. for individual, different determinations)
then the tubing must be removed from the sample
vessel and then re-immersed.
• The measuring cell is emptied. This can be carried
out by the Dosino (with 'External pump off') and re-
quires the input of the aspiration volume in mL. This
can also be carried out with a pump (with 'External
pump on'), e.g. a Metrohm 683 Pump. In the latter
case the aspiration time must be entered (in
HH:MM:SS).
Rinsing system
rinse
meas. cell
repeat
rinsing
aspirate
meas. cell
• The measuring cell is rinsed. Solvent is added. This
can be carried out by the Dosino (with 'External pump
off') and requires the input of the aspiration volume in
mL. This can also be carried out with a pump (with
'External pump on'), e.g. a Metrohm 683 Pump . In the
latter case the rinsing time must be entered (in
HH:MM:SS).
• The measuring cell is again emptied, see above.
• The rinsing procedure can be repeated up to 10
times. (Recommendation: rinse twice.)