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5.5 Compartmentized Probe Tip Inspection
This inspection is best done with the probe lowered near ground level.
A. While keeping the hands clear of the Probe, have someone OPEN and CLOSE the probe tip through several
cycles. The inner tube should rotate smoothly and evenly within the outer tube.
B. The plastic cap on the end of the probe tip should be in good condition. A damaged cap should be replaced
at once; otherwise it will leak, reducing the vacuum drawn in the probe tip.
C. With the probe tip OPEN, the inner tube should be clear and free of any obstructions.
D. The probe tip should pivot freely on the end of the boom without side play.
5.6 Core Probe Vacuum Pressure Equalization
The Core Probe is designed to be a balanced system such that air is neither being pulled into or pushed out of the
sampling end of the tip. Check for correct air balance as follows.
A. Turn the vacuum motor on.
B. Place a three inch square piece of paper over the sample opening.
C. The paper should stay in place without being sucked into the opening.
D. To correct air imbalance, loosen the vacuum hose where it connects to the probe tip.
E. To increase suction slide hose up to expose some of the existing relief holes.
F. To decrease suction slide hose down to cover up some of the relief holes.
G. Check for proper balance again & re-adjust if necessary.
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General