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| Penetrability Measurement (with Precision Universal Penetrometer) | to Top |
2.Change weight(s) on loading rod, if necessary. (Note weights used and be consistent in a given series of measurements.)
3.Level instrument if bubble gauge indicates the need. (Leveling screws are in the base.)
4.With the hand under the cone, release the clutch (depress lever below the dial.) With the clutch released, raise the test rod to its top position (push up on cone). Allow lever to return to its initial position.
5.Check the position of the pointer. If not on zero, adjust with the screw under the instrument head.
6.Center the sample on the base under the cone.
7.With the knob on the right side of the support rod, rack the instrument head downward until the tip of the cone just barely contacts the sample surface.
8.Note the exact time while releas@ the clutch, permitting the cone to penetrate the sample. Keep the lever depressed for the exact time of measurement; release.
9.Push the depth gauge at the top center of the instrument down gently as far as it will go. Read the depth of penetration in mm. (Dial reads in tenth-millimeters; move decimal point one place to the left).
10.Rack head upward so that sample cup can be removed.
11.Return the test rod to its top position as in 4. Note that the pointer is returned to zero.
12.Clean cone with damp paper towel if necessary before making next measurement.
13.When measurements have been completed, remove cone and wash thoroughly.
| REFERENCES | to Top |
´ ´ Updated: Wednesday, October 31, 2007.