The US VATSA-01 is a computerized laboratory instrument for
the simple and rapid determination of the size frequency
distribution of sediment samples containing particles from 62
microns to 2 millimeters. The instrument operates on the same
principles of operation as the original US VATSA-53 but uses a
digital linear encoder with a Campbell CR-10X data logger to
eliminate the chart drum recorder. The VATSA-01 produces a
time based, size frequency distribution of sediment particle
size that gives a scalable array of data for digital
processing on a PC. The sedigraph software program is provided
for the analysis and presentation of data.
The Advanced Sand Sedimentation Analyzer can measure the
sedimentation velocity distribution, and its data processing
program, sedigraph, convert it into a distribution of other
sedimentation variables, such as shape-specified grain size.
For the conversion, the equation for drag coefficient as a
function of Reynolds' number and grain shape is utilized.
Distributions of the following sedimentation variables are
available:
- Sedimentation velocity
- Shape-specified grain size
- Grain shape
- Grain density
- Reynolds' number
Each of the grain parameters density and shape can also be
quantified as a distribution. This is possible for samples of
nearly equal grain size such as narrow sieve fractions.
503-190 US
VATSA-01 105 lbs.
Size Analyzers
