Operating Instructions
GS-3 Multiple-inlet Cyclone
Cat. Nos. 225-100 and 225-103
Introduction
Description
The GS-3 Cyclone is a 10-mm
lightweight conductive plastic
sampler with multiple inlets
that uses a standard three-piece
25 or 37-mm casse e and fi lter for
collecting respirable dust particles.
The GS-3 Cyclone conforms to
the ISO 7708/CEN criteria of a
4-μm 50% cut-point at 2.75 L/min*
with minimum bias meeting the
performance criteria in OSHA’s
final silica rule. Other flow rates
may be used to achieve cut-points
for alternative applications. The GS-3
Cyclone is supplied with cassette
adapter, bowl adapter, and grit pot.
* Calibrated at U.K. Health and Safety
Laboratories. Visit www.skcinc.com/
prod/225-100.asp to view the collection
effi ciency curve.
863 Valley View Road, Eighty Four, PA 15330 USA
Tel: 724-941-9701 • www.skcinc.com
Casse e outlet
Support pad
Filter
Casse e ring (middle)
Casse e adapter (25 or 37 mm,
supplied assembled with cyclone body)
Bowl adapter (supplied assembled
with cyclone body)
Nodule for holder
Retaining tab
Cyclone top
Thumbscrew
Cyclone body
Grit pot
GS-3 Cyclone with fi lter cassette —
O
Required Equipment
;
Sample pump capable of specifi ed fl ow rate
;
1/4-inch ID (3/8-inch OD) Tygon® tubing for calibration train
;
Electronic calibrator
;
Calibration Jar (Cat. No. 225-111)
;
Casse e Holder (Cat. No. 225-1)
;
Filter Casse es sampling media (225 Series)
Figure 1.
exploded view
Getting Started
Assembling Cyclone with Cassette (Figure 1)
The GS-3 Cyclone is supplied fully assembled with bowl adapter and 37 or 25-mm
casse e adapter dependent upon model (Cat. Nos. 225-100 and 225-103, respectively).
Replacement casse e adapters are available, allowing the user to adapt whichever
model they are using to another casse e size.
1. Disassemble a three-piece casse e and set aside inlet section (usually marked
“inlet”). Keep inlet section for closing the casse e after sampling.
2. Select a fi lter and support pad as specifi ed in the sampling method. Place
support pad into casse e outlet and place fi lter on top of support pad. Insert
casse e ring (middle) section into casse e outlet. Ensure a fi rm seal.
3. Hold cyclone upside down (casse e adapter facing downward). Insert casse e
adapter into casse e middle ring section. Press until a fi rm seal is established.
4. Ensure thumbscrew on cyclone is secure and that the grit pot remains on the
cyclone body during calibration and sampling.
Inserting Cyclone/Cassette Assembly in Cassette Holder (Figure 2)
1. Insert the cyclone body
through the large opening
of the casse e holder.
2. Ensure the cyclone/casse e
assembly is seated fi rmly in the
holder by inserting the small
round nodule on the rim of the
bowl adapter into the notch in
the casse e holder.
3. Remove the plug from the
casse e outlet.
4. Secure the cyclone/casse e
assembly in the holder by
stretching the spring-loaded
hold-down plate over the
casse e outlet.
5. Insert the holder’s Luer
adapter (located on the end of
the spring-supported rubber
tubing) into the casse e outlet.
Filter casse e
holder
Luer adapter
Filter casse e
GS cyclone
Grit pot
2
Collar clip
Figure 2.
GS-3 Cyclone/cassette assembly
in holder (Cat. No. 225-1)
Rubber tubing
Casse e outlet
Spring-loaded
hold-down plate
Tygon tubing
Operation
Calibration
1. Prepare a cyclone/casse e assembly (Figure 1). Ensure grit pot remains on
cyclone body during calibration.
SKC recommends using the smallest calibration jar possible. To achieve this, do
NOT use Cassette Holder Cat. No. 225-1 during calibration.
2. Place cyclone/casse e assembly into an airtight calibration jar that contains an
inlet and outlet (Cat. No. 225-111, Figure 3).
3. Using fl exible tubing, connect outlet of calibrator to inlet of calibration jar.
4. Run tubing from outlet of cyclone/casse e assembly through the outlet of the
calibration jar and to the inlet of a sample pump. If using the Calibration Jar
(Cat. No. 225-111), connect the Luer adapter inside the jar lid to the casse e
outlet. Connect jar outlet tubing to the sample pump inlet.
Outlet
inside calibration jar
Multi-purpose Calibration Jar
(Cat. No. 225-111)
Inlet
Sample pump
Inlet
(pressure)
Calibrator
Outlet
(suction)
0.000
L/minute
GS-3 Cyclone/cassette assembly in calibration jar
Inlet
GS-3 Cyclone/casse e assembly
Figure 3.
5. Turn on pump and calibrate to desired fl ow rate following directions in the
pump and calibrator operating instructions.
Flow rate: • 2.75 L/min for a 4-μm cut-point*
* Calibrated at U.K. Health and Safety Laboratories. Visit www.skcinc.com/prod/225-100.asp to view the
collection effi ciency curve.
6. After calibration, disassemble calibration jar, remove cyclone/casse e assembly,
and replace casse e used for calibration with a fresh (unused) casse e to be
used for sampling.
3
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