OPERA TING INSTRUCTION FOR PILCON DIRECT READING HAND
VANE TESTER
Remove plastic cover from instrument and screw in position the required vane
spindle, or if taking tests at greater depths than 150mm fit in the requisite
number of extension rods.
The point is to be rotated clockwise until it comes to rest against the 'dog
plate'.
The instrument is then ready for use and should be forced into the clay with
as little sideways movement as possible, to a depth of about 70-80mm.
Holding the instrument in one hand revolve the head clockwise at a speed
equivalent to a complete revolution in a minute. When the sample has
sheared, the pointer will remain set and a reading of shear strength
determined from the scale corresponding to the vane used.
The above procedure is then repeated for further testing.
The vanes and instrument after use should be wiped over with a damp cloth
only to remove dust and mud. The head requires no attention as the bearings
are of the oil retaining type.
Please state serial number of tester as shown on dial/DR/ ...... when ordering
spare parts, etc.
NOTE:
When coupling and uncoupling rods always use both spanners
To avoid straining the spring which could ruin the accuracy of
this individually calibrated instrument.
