Humboldt H-4340 Sand Equivalent Test Set with Case - Manual (Page 4)

Perform the test at a location free from vibration. Excessive vibration may cause the
suspended material to settle at a greater rate than normal.
Do not expose the plastic cylinders to direct sunlight any more than is necessary.
Occasionally it may be necessary to remove a fungus growth from the working calcium
chloride solution container and from the inside of the flexible tubing and irrigator tube.
This fungus can easily be seen as a slimy substance in the solution.
1. To remove this growth, prepare a cleaning solvent by diluting sodium hypochlorite
solution (household chlorine beach) with an equal quantity of water.
2. Fill the solution container with the prepared cleaning solvent, allow about 1 litre of
the cleaning solvent to flow through the Siphon assembly and irrigator tube, then
place the pinch clamp on the end of the tubing to cut off the flow of solvent and to
hold the solvent in the tube. Refill the container and allow to stand overnight.
3. After soaking, allow the cleaning solvent to flow out through the siphon assembly
and irrigator tube.
4. Remove the siphon assembly from the solution container and rinse both with clear
water. The irrigator tube and siphon assembly can be rinsed easily by attaching a
hose between the tip of the irrigator tube and water faucet and backwashing fresh
water through the tube.
Occasionally the holes in the tip of the irrigator tube may become clogged by a particle
of sand. If the obstruction cannot be freed by any other method, use a pin or other sharp
object to force it out using extreme care not to enlarge the size of the opening.
Apparatus
A graduated transparent acrylic plastic cylinder, rubber stopper, irrigator tube, weighted
foot assembly and siphon assembly all conforming to the respective specifications.
Measuring Tin: A tinned box approximately 2¼ in. (57 mm) in diameter having a capacity
of 85 ± 5 ml.
No. 4 (4.75 mm) Sieve, conforming to the requirements of Specification E 11.
Funnel, wide-mouth, for transfering test specimens into the graduated cylinder.
Bottles, two 1 gal (3.78 litres), to store stock solution and working solution.
Flat Pan for mixing.
Clock or Watch, reading in minutes and seconds.
Mechanical Sand Equivalent Shaker, having a throw of 8 ± 0.04 in. (203.2 ± 1.02 mm)
and operating at 175 ± 2 cpm.
NOTE 2: Moving parts of the mechanical shaker should be provided with a safety guard
for protection of the operator.
Manually 0perated Sand Equivalent Shaker (optional) or equivalent, capable of
producing an oscillating motion at a rate of 100 complete cycles in 45 ± 5 sec, with a
hand-assisted half stroke length of 5 ± 0.2 in. (127 ± 5.08 mm).