Gilson Company, Inc.
GilSonic AutoSiever: GA-6
Page 10
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When dry, store Precision Sieves in their plastic jewel cases
until ready for next use.
•
Never touch the mesh of Precision Sieves with the fingers.
Acids and oils on the skin will quickly discolor and corrode
the mesh.
8.2 Standard Sieves
Sieves with woven-wire mesh are generally more robust than
Precision Sieves, but must still be handled with care to maintain
their effectiveness as testing instruments.
•
Do not subject sieves to temperatures higher than 120˚F
(49˚C).
•
Coarser sieves may be gently brushed to clean; finer sieves
should be immersed in an ultrasonic cleaner as noted
above.
•
Do not use compressed air to clean sieves.
9.0 MONITORING PERFORMANCE
While it is not practical to attempt to “calibrate” the AutoSiever
device itself, performance of the unit as related to particle
separation can be monitored. Tracking ongoing performance
and repeatability can be an important part of a QC/QA program
and should be done periodically for any testing device.
7.0 PERFORMING A TEST
A. To perform a test with the AutoSiever, start by following the
steps in Section 5.0, Preparing the Sieve Stack Assembly.
Place the Stack Assembly with the sample into the unit and
close the door.
B. Turn the power switch on and either enter amplitude and
phase time values as described in Section 6.2 C through J,
or select a previously stored program from one of the ten
memory locations by pressing REC/
and the memory
location.
C. Press the RUN/STOP button to initiate the test. The
AutoSiever will execute the program and automatically stop
at completion.
D. Remove and disassemble the stack assembly and weigh the
individual sieves with the separated fractions. Subtract the
tare weights of the individual sieves to determine fraction
weights.
E. Total sample weight can be determined by adding the fraction
weights to the weight of the fines on the tared Fines Collector,
Top Diaphragm, Top Cone and Spacers and subtracting the
tare weight of the components.
8.0 CARE & HANDLING OF SIEVES
8.1 Precision Sieves
Gilson Precision Sieves are made of unsupported electroformed
nickel mesh for the maximum open area. Sieves with support grid
are also available. These sieves are delicate testing instruments
and must be handled with care.
•
When testing with sieves of 10µm or less, use only one
sieve at a time in the sieve stack assembly. Using more may
impede air flow and result in damage or poor separations.
•
Never exceed a sample weight of 5g or volume of 5 cc
when using Precision Sieves.
•
For cleaning, use an Ultrasonic Cleaner of 150 watts or
less with water temperature between 70˚ and 90˚F (21˚
to 32˚C). Place sieves in on edge for 30 seconds to one
minute, then remove and allow to air-dry. Do NOT brush
or use compressed air to clean precision sieves!
•
Do not expose to radiant heat or attempt to dry in a
conventional or microwave oven.
Standard & Precision Sieves
