Metrohm 746 VA Trace Analyzer User Manual
Page 174
5.3.2 STAND
746 VA Trace Analyzer / 747 VA Stand
5-23
Softkeys
Meaning
695 Auto
sampler
Switch to 695 Autosampler and VA Stand 3
For operation of a 695 Autosampler with the 746 VA Trace Analyzer, a
747 VA Stand with stand address
3
is needed. This softkey is used to
switch to the 695 Autosampler and to the VA Stand with address
3
.
The stand currently selected is displayed in the title line:
Manual Address 1
VA Stand with address 1
Manual Address 2
VA Stand with address 2
Automatic Address 3
VA Stand for Autosampler with address 3
717 Smpl
Changer
Switch to 717 Sample Changer
Reserved for future applications. This softkey will be used to switch to
the initialization and manual operation of the 717 Sample Changer via
746 VA Trace Analyzer.
Rinsing
Dosinos
Switch to rinsing Dosinos
The measuring vessel at the 747 VA Stand can be rinsed by means of
two 700 Dosinos with 50 mL dosing units screwed to supply contain-
ers, one of which adds the rinsing solution while the other siphons off
the wash solution into the waste container. The rinsing Dosinos must
be attached to the 746 VA Trace Analyzer and initialized according to
section 3.10.5. This softkey is used to switch to the manual operation
of the two rinsing Dosinos. The following functions are available:
Rinse
meas.v.
Rinse measuring vessel
After this softkey has been pressed, the measuring vessel is auto-
matically rinsed as follows:
•
The solution in the measuring vessel is siphoned off.
•
The measuring vessel is filled with the volume of rinsing solu-
tion defined as
V.rinse
.
•
The rinsing solution is siphoned off.
•
The measuring vessel is filled with the volume of rinsing solu-
tion defined as
V.standby
(conditioning solution).
Prime
Dosinos
Initialize rinsing Dosinos
The burette cylinders of the rinsing Dosinos and all connecting tubing
up to the measuring vessel are automatically filled with rinsing solu-
tion.
Empty
Dosinos
Empty rinsing Dosinos
The burette cylinders of the rinsing Dosinos and all connecting tubing
up to the measuring vessel are emptied.
Exchange
position
Switch rinsing Dosinos to exchange position
The current position of the two rinsing Dosinos is shown in the pa-
rameter
Rinse unit pos.
:
exch.
Exchange position (dosing unit can be changed)
rinse
Rinse position
To fill or empty the containers or to remove the dosing units from the
Dosinos, the Dosinos must be in the
exch.
position. If the Dosinos
are in the
rinse
position, they have to be switched to the exchange
position by pressing
.
2