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Part B: LabTec™ Software
1.0 Software Overview: Main Menu
The main menu of the LabTec™ consists of five (5) operational modes as shown on the next page.
By using the “Up” and “Down” keys, one can readily scroll through the main menu. Press the “Select”
key to enter a chosen operational mode, i.e. WGT RATIO (Weight Ratio). By pressing the “Select” key
the first level submenu is entered, which provides access to the “Exec” and “Edit” functions. In the
“Edit” submenu, the parameters for the dispensing application are selected. The LabTec™ has three
(3) dispensing modes, namely, Weight Ratio Dispensing, Volume Dispensing and Weight Dispensing.
WGT RATIO: In the Weight Ratio Dispensing mode, the LabTec™ is connected to an electronic,
top-loading scale and allows automatic sample weighing and dilution: The LabTec™ will tare the
scale after the sample container has been placed onto the scale. The sample to be diluted is then
placed into the container and the sample weight is captured and displayed by the LabTec™. The
diluent is automatically dispensed by the LabTec™ based on the user-defined sample to diluent
weight ratio. Monitoring and Alarm of backpressure is available in this mode.
VOLUME: In the Volume Dispensing mode, the LabTec™ dispenses user-defined volumes. In this
operational mode, the LabTec™ utilizes factory installed master calibration curves. These
calibrations are valid for a given pump head, motor and pump tubing combination. Typically the
calibration is carried at or near 100% motor speed although a lower pump speed setting may be
advisable for smaller volumes. A Re-Cal feature, available from the front panel, is used to fine-tune
this calibration, and to compensate for pump output changes due to peristaltic pump tube wear. Both
the Slow Factor and the Sniffle functions are available in the Volumetric Dispensing mode, as well as
Monitoring and Alarm of backpressure.
WEIGHT: In the Weight Dispensing mode, the LabTec™ is connected to an electronic, top-loading
scale while dispensing solutions by weight. In this operational mode, the LabTec™ does not require
calibration since dispensing by weight involves an already calibrated scale. Typically, dispensing by
weight is somewhat slower than dispensing by volume. The main reason for this slow-down lies with
the limited response speed of electronic scales. Both the Slow Factor and the Sniffle functions are
available in the Weight Dispensing mode, as well as Monitoring and Alarm of backpressure.
MANUAL: Allows manual pump speed control.
SETUP: This operational mode allows selection of various user preferences and interface options.
Note: Monitoring and Alarm of backpressure is available in this mode, but no data output is
available.
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