5. Measurement
32
3
Sampling
z
Adjust sample/drain lever to “Sample.”
z
Adjust sampling speed controller to
slowest (scale 0).
z
Press “PUMP” to start sampling.
z
Slowly turn the controller until you reach
optimal speed for sampling.
z
Check through cell window to make sure
there is no air bubble in the cell.
z
Press “PUMP” again to stop sampling.
Hint
Be careful when sampling speed is increased abruptly (e.g.
scale 0
Æ
5), air bubbles may be formed.
Hint
For a series of measurements of the same sample, continue
sampling at the same speed. For a different type of sample,
start sampling by adjusting speed first.
4
Start measurement
z
Press “START”.
A message of “Measuring” will
appear.
5
Measurement ends
z
Once oscillation frequency
becomes stable, measurement
comes to an end and result
(density of sample) will be
shown.
Result will be printed out
when printer is connected.
Check air bubbles.
Summary of Contents for DA-640
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