Fritsch analysette 22 ECONOMY, Operating Manual

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analysette 22 „ECONOMY“ Page 4
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The system is controlled by means of a mouse and monitor,
via keyboard or touchpad. You also have the option to
combine PC and process control system to complete indi-
vidually programmed measuring cycles including
ƒ background measurement
ƒ sampling
ƒ measuring (single and multiple measurements)
ƒ recording of the results
ƒ
rinsing and restart after a set delay.
This allows for routine processing, as the individual cycles
can be started by the pressing of a button. For ONLINE
measurements, you have the option to programme sam-
pling by extraction from a connected BY-PASS.
A dispersing unit for small liquid samples is available as
auxiliary device, allowing for the easy preparation of small
suspension samples. It allows for the analysis of small liq-
uid samples (approx. 100 ml).
You have the option to select any range between the
smallest measuring range (0.1µm to approx. 25µm) (meas-
uring cell at smallest possible distance to sensor) and the
largest range (10µm to 600µm, largest distance between
cell and detector) for your sample.
You can thus for example process a range of between
0.1µm and 600µm in one single measuring procedure by
combining up to 10 individual measuring cycles.
If you need a better resolution as regards particle size dis-
tribution, simply enter the number of desired measurement
channels for each multiple cycle.
After you have the defined the lower and upper limit of the
range, the measurement is divided into maximum 10 adja-
cent measuring ranges, while the sample is entered only
once prior to starting the procedure.
The result of such a procedure is subsequently available at
high resolution in up to 310 channels. This allows for a the
accurate analysis of for example highly inhomogeneous
samples that contain particles of various size. The high
resolution ensures an accuracy that is not achievable with
other methods.
High resolution output is also of interest for very fine parti-
cles: by means of multiple measurements within narrow lim-
its, e.g. 0.1µm and 60µm, a sample can be measured using
for instance 155 (or more) measuring channels.