Metrohm 765 Dosimat - Manual (Page 14)

2.2. Modes
765 Dosimat
10
2.2.4 Mode PIP, Pipetting
Aspirating and subsequent expelling of a stored pipetting volume.
V-PIP 0.1 ml Pipetting volume
Input range depends on the volume of the exchange unit:
1 mL
0.001... 0.900 mL
5 mL 0.001... 4.900 mL
10 mL 0.001... 9.800 mL
20 mL 0.002... 19.700 mL
50 mL 0.005... 49.500 mL
Note: The liquid of the exchange unit is mixed with the
pipetted liquid if it is aspirated into the burette cylinder!
The aspiration tube must contain V-PIP!
Expelling and filling rate see page 6.
If mode PIP is loaded, the display shows
PIP * 0.000 ml
.
The sign * in the display means that mode "PIP" is not yet ready to be used. With a first
, a preparation step is carried out which is marked in the display with
PIP prep.
. This preparation step includes the formation of an air bubble which
serves to separate the transfer solution of the exchange unit from the sample.
Then display shows
PIP 1 0.100 ml
, i.e. the Dosimat is ready to aspirate the pipetting
volume (0.1 mL). With the pipetting volume is aspirated and display shows
PIP 2 0.100 ml
which means that the Dosimat is ready to expel the pipetting volume.
With the next , the volume is expelled and the Dosimat is then ready to aspirate
the next pipetting volume without any preparation step.
If the pipetting volume is changed, a new preparation step is always carried out.
Sequence of PIP
Standard mode PIP.
Preparation step: Hold burette tip free at working
height.
Ready to aspirate the pipetting volume: Immerse
burette tip.
Ready to expel the pipetting volume: Hold
burette tip for pipetting.
Note
VOLUME
RATE
PIP * 0.000 ml
↓
↓
PIP prep.
↓
PIP 1 0.100 ml
↓
↓
PIP 2 0.100 ml
↓
↓