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II. GENERAL INFORMATION
2.1 System Description
The Truck Probe is designed to collect a representative sample of granular, pellet, chip, flake or other materials from
an open top hopper truck. Figure 2-1 illustrates a typical Truck Probe installation.
Sample collection is initiated in response to the operator's manual command generated by controller logic. A sample
cycle begins when the operator positions the probe tip for insertion into the truck by rotating the boom and stroking it
in or out to the desired sampling position. The vacuum system is turned on and then the probe tip is inserted down
into the hopper truck with the sampling ports closed. The sampling ports are opened to receive a sample and then
closed to dump the sample in the vacuum conveying chamber of the probe tip. The probe tip is raised and re-inserted
into the material in a different location. This is repeated as required by the FGIS or other regulating guidelines.
Once the truck has been properly sampled and sufficient time has elapsed for the sample to be thoroughly conveyed
to the collection cabinet the operator will shut off the vacuum system. The sample can now be emptied from the
collection cabinet to be analyzed.
FIGURE 2-1, TYPICAL INSTALLATION, TRUCK PROBE SYSTEM
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General