BRAND HandyStep touch, Operating Manual

Page: 80 / 234

80
Handling remaining liquids
If the entire volume has been dispensed, a volume remains in the tip. You
can then decide whether to drain the tip or continue filling. For informati-
on on handling residual volumes, see
„Switching to emtying“ → 71
and
„Aspirating liquid“ → 70
.
Sequential Dispensing (SEQ-DISP)
For information on the function of this mode, see
„Overview of modes“
→ 65. For information on setting the volume, speed, and other operating
steps found in all modes, see
„Operation“ → 67.
Sequential Dispensing in detail
4
3
2
1
5
6
7
1. Total volume of the aliquot list.
2.
STEP previously dispensed.
3. STEP now being dispensed.
4. STEP to be dispensed next.
5. STEP number to be dispensed next.
6. Number of STEPs that you have designated in the aliquot list.
7.
Present volume in the tip.
In the Sequential Dispensing operating mode, you dispense a defined
sequence of different or equal volumes of liquid. These volumes are called
aliquots and are defined via the aliquot list (1 ... 10 aliquots). In the opera-
ting mode, you then see up to 3 entries of the aliqout list. These entries –
specifically, the previous, current and next entry – are indicated by a number
sign (#). If an aliquot is dispensed, the display moves down the list (
1
, #2,
 #1,
2
, #3  #2,
3
, #4 ... #10). It can only be dispensed if a sufficient
volume has been aspirated.
If the aliquot amount exceeds the tip volume, you can aspirate liquid again
and then continue dispensing.
If the aliquot amount is less than the tip volume, as much liquid is aspirated
as is needed for the given aliquot list.
If you cancel an aliquot (X button on the display), this aliquot is counted
as not dispensed. In this case, an event message is output. The program
jumps to the next aliquot in the list. If there is not enough liquid in the tip at
the end of aliquoting, the device aspirates exactly the required amount of
liquid, in order to complete aliquoting.
The aliquot list can no longer be changed when the first aliquot has been
dispensed. You can edit the aliquot list again only after you have completed
dispensing.