Metrohm 765 Dosimat User Manual download pdf (Page 14)

2.2. Modes

765 Dosimat

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

<GO>, 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 <GO> 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 <GO>, 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

↓

<GO>

↓

PIP prep.

↓

PIP 1 0.100 ml

↓

<GO>

↓

PIP 2 0.100 ml

↓

<GO>

↓

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 65 66

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Metrohm 765 Dosimat User Manual Page 14

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