Fritsch ANALYSETTE 3 - Sieving Parameters; Wetting Agents; Feeding the Rinsing Liquid

6.3.1 Sieving parameters
Parameters Average High percentage of
ne ground material
Sieving me 3...10 min approx. 15 min
Amplitude 2...2.5 mm
6.3.2 Weng agents
Weng agents improve dispersion.
n Add tensides in liquid form (washing-up liquid, Dusazin etc.) in small
amounts only (dropwise), to prevent frothing.
n Add inorganic or organic salts like tetrasodium diphosphate or
sodium lauryl sulfate and poly salts in amounts of 0.1 - 0.5 %.
6.3.3 Feeding the rinsing liquid
At the quick-release coupling (N) on the plexiglas clamping lid with 2
rotaon nozzles, connect a hose (with hose clamp), through which the
rinsing liquid c
an be fed. Feed just enough water or alcohol (only possible
with addional pump) to prevent a backup in the sieve set.
The maximum amount of liquid is determined by 2 rotang nozzles on
the clamping lid (approx. 1.5 l/min at approx. 2 bar).
Make sure that the liquid ows evenly out of the wet sieve pan - this is a
sign of good distribuon of sieving stock and liquid.
If the liquid stops owing, it indicates that there is a backup in one of the
sieves. Close the inlet and check the sieves for a possible backup. The
overpressure caused by the backup in the sieve stack can cause irrepar-
able damage to the sieve mesh wire.
If there is a backup in the sieve set, we recommend
reducing the sample quanty, switching on the
"In
terval" mode or using the intermediate sieve ring
(see
Ä Chapter 6.3.5 „Tips for wet sieving of dicult
sieving stock“ on page 28).
Make sure that the small opening (O) in the wet clamping lid is open -
only then does it prevent overpressure from developing and possible
damage to the sieve mesh wire.
Through this opening (O) in the wet clamping lid, it is also possible to
rell weng agent if necessary (e.g. with a pipee), as weng agent
gets washed out during lengthy sieving mes.
Using the device
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