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Preparing the measurement
Open fill cock and fill burette.
Close fill cock, open burette cock and
flood the measuring dome.
Close burette cock.
Take the soil sample out of the trough and
move it horizontally to the device.
Put the sample slightly tilted on the water
lense, to make sure air can escape.
Put the crown on the sample ring.
Fix the measuring set up with the screw cap.
Fill burette again.
Open burette cock until water drains
off through the discharge.
Clay samples may be „watered"
to reduce time.
Fill burette with up to 5 cms (2 in) water
column.
Open burette cock and check if sink rate
is approx. 0.1 cm/10 sec (0.1 in/20 sec).
If it is significantly less you may add water
into the burette to increase the driving
pressure and to reduce measuring time.
Note: burette vs screen reading
The measuring setup is tight if the meniscus is at zero after the water has drained off.
The pressure reading on the screen may slightly differ by ± 0.1 cm (approx. 0.05 in).
A water lense is visable.
for clay only
5
0.1 cm/10 sec
(0.1 in/20 sec)
0
water
drains off
Measuring | 5
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