Eppendorf Research pro - Manual (Page 8)

8
The Research pro is a microprocessor-controlled pipette which executes the piston movement
with the aid of a stepper motor. The power supply is a rechargeable nickel-metal hydride
battery.
Dispensing and Reverse Pipetting require a different basic position than that for Pipetting. The
request to change the basic position is indicated in the display by
.
Ejector with extension
The force translation of the ejector for pipette tips ensures that tips are ejected
very easily. The extension can be individually adjusted to accommodate left-
and right-handed users as well as different hand sizes. Select the desired
setting by simply sliding the extension into the position as required.
Hook on the hand rest
Loosening the screw enables the hook on the rear of the pipette to be adjusted to suit all hand
sizes.
Contact surface on the rear of the pipette
Both upper surfaces are required for charging the nickel-metal hydride battery.
The lower surfaces are the data interfaces for the Service Department.
The contact to the charging adapter or the charging stand cannot be confused with any other
contacts.
Acoustic signals
Certain signals assist the user for different operations:
– Short signal to acknowledge that the keypad has been pressed.
– Slightly higher tone to indicate that the function for which the key has been pressed cannot
be executed.
– Louder tone to indicate that a piston movement has ended.
– Longer tone to indicate that a specific sequence of steps (e.g. Dispensing) has ended.
– Louder tone to indicate an error message.
The acoustic signals are a great help when you are familiarizing yourself with the operating
procedure of the Research pro. They can also be switched off if required (see Sec. 5.11).
For sample aspiration, the
piston moves upwards from
the basic position.
The sample is aspirated into
the pipette tip. Return to the basic position
– via short single steps
= Dispensing
– entire path = Pipetting.
Residual liquid
discarded via
blow-out (BLOW).
4.2 Function units
Upper end position
Basic position
End of blow-out
R
Extension
Ejector
4 Operating principle
Operating principle
4
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