18
Program Editing and Execution
At this point, you need to consider the parameters of the dispensing that you are going to do. The
following is a list of the various parameters available, and their defaults. Adjust these parameters
based on the volume that you are dispensing.
DISPENSE VOLUME: Defines the volume to be dispensed in milliliters. (The default volume is 10.0
mL).
PUMP TUBING: This choice exists if a peristaltic head has been installed. Choices are 13, 14, 16,
25, 17, 18, (thin-walled, 1081 Head) 15, 24, 35 (thick-walled, 1082 Head). The built in master
calibration for that tubing is then utilized. (Default = 13)
SNIFFLE: The sniffle function consists of a brief pump reversal at the end of the dispensing cycle
to suck in the droplet that typically hangs at the end of the dispensing tip. It also will relieve the
pressure on a filter if you are using one so that it does not drip. (The default Sniffle = 0.3, please
start at 0.0 if not using a filter.)
SLOW FACTOR: Defines the solution volume that is dispensed slowly at the end of the dispensing
cycle. This should be set between 1-10 mL depending the volume being dispensed and the tubing
size to avoid overshooting the target volume. For example, if you’re using #15 tubing, and the target
volume is 100 mL, a slow factor of 1 or 2 mL will work fine. The default Slow Factor = 1.00 mL. This
may be adjusted as necessary.
DIRECTION: Defines the rotation of the pump head, this parameter can be changed from clockwise
(CW) to counter clock-wise (CCW). (Default = CW).
PUMP RATE: Defines the relative pump speed (0% to 100%) with which the solution is being
dispensed. The default Pump Rate = 100%. This may be adjusted as needed, slower pump rates
may be desirable to increase precision and minimize back splashing.
TIME DELAY: Defines the time interval, in seconds, between dispensing cycles. (Default = 1.0).
COUNT: Defines how often the dispensing cycle will be repeated. For example, when COUNT = 10,
then the selected Dispense Volume will be dispensed 10 times. (Default = 1).
1.
For this example, the tubing will be #24, and a dispense volume of 100.00 mL. From the Mode
Select screen, use “A” or “B” to go up or down to the “Volume” mode, and Press “C” to select it.
The Volume mode will give you the following display.
- VOLUME DISPENSE -
Exec
Edit Prime
A B C
2.
Press “B” to enter the Edit Menu, and use “A” or “B” to scroll to “EDIT 1”.
Up
- E D I T 1 -
Down
Select
A B C
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