Parker SciLog LabTec Installation, Operating, & Maintenance Instructions page 13

Program Editing and Execution:
1. From the main menu, press "Up" or "Down" to scroll between the modes until you reach
"WT RATIO", and "Select" it.
2. From this screen, you can now "Prime" the system with fluid, or enter either an "Exec"
(Execute) or "Edit" mode.
The LabTec™ will allow you to Edit, store and Execute ten different sets of dilution parameters
depending on your needs.
3. 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. We strongly suggest
that you use #24 Silicone tubing and these defaults initially, and then optimize your system after a
review of your results during the first few days of operation.
WGT FACTOR: Defines the weight ratio (multiplier) that is applied to the actual sample weight, as
determined by the scale, to arrive at the required diluent weight. WGT FACTOR = 9.00 is the default,
and will yield a 10-fold dilution. You may increase or decrease this to any ratio desired. Select a
WGT FACTOR = 99.00 if you want a 100-fold dilution.
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. When a filter is in use it will
relieve the pressure so it does not drip. Select SNIFFLE = 0.3. (The default is 0.0.)
SLOW FACTOR: Defines the diluent weight that is dispensed slowly at the end of the dispensing
cycle.The default SLOW FACTOR = 25.0 grams. This may be adjusted if 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 pup speed (0% to 100%) with which the diluent is being
dispensed. The default PUMP RATE = 80%. This may be adjusted as needed. Higher speeds are
not recommended.
TIME DELAY: Not used in Weight Ratio Dispensing mode. Defines the time interval, in seconds,
between dispensing cycles. (Default = 00.01)
COUNT: Not used in Weight Ratio Dispensing mode. Defines how often the dispensing cycle will
be repeated. For example, when COUNT = 10, then the selected DISP. WEIGHT will be dispensed 10
times. (Default = 1)
- WEIGHT RATIO -
Up Down
A B
Select
C
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