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SKC Reusable Parallel Particle Impactors (PPI)
†
The patented
impaction-based SKC Reusable Parallel Particle Impactor
(PPI
®
) Samplers are designed to match precisely the collection effi ciency
curves for respirable and thoracic dust specified by ISO 7708/
CEN and adopted by ACGIH, CEN, and other occupational
hygiene organizations. The performance of the respirable
PPI samplers also meets the ISO 7708/CEN criteria included
in the OSHA fi nal silica rule. The thoracic model meets the
requirements of NIOSH Method 5524 for metalworking
fluids and compounds with ACGIH
Constructed of conductive aluminum, these PPI Samplers
may be reused and off er a choice of fl ow rates for maximum
fl exibility in pump options, sample duration, and contaminant
concentration.
Performance Profi le
Sampling Rate:
Sample Pump:
Sample Time:
Sample Media:
Impaction
Substrate:
Analysis:
Body Material:
Dimensions:
Height:
Diameter:
Depth:
Weight:
† U.S. Patent No. 7,073,402
* Back pressure on PTFE fi lters can vary within the same lot.
2 L/min respirable or thoracic and 4 or 8 L/min
respirable
• Universal XR or AirChek
• Leland Legacy
®
Dependent on method used. Note: SKC tests indicate that a
particulate mass of up to 6.8 mg on the four impaction substrates would
not aff ect PPI performance. This amount is equivalent to sampling for
6 hours at 4 L/min in environments where respirable mass concentration
3
is 4.76 mg/m
and equals 50% of total dust. However, labs have reported
to SKC that they prefer no more than 2 mg on the fi lter for analytical reasons.
Therefore, SKC recommends that you work with your lab to determine
optimum sample times for your unique sampling conditions.
37-mm PVC fi lter, 5.0-μm pore size or
37-mm PTFE fi lter,* 2.0-μm pore size (NIOSH 5524) or
37-mm MCE fi lter, 0.8-μm pore size
Use cellulose pad or stainless steel screen for support.
Four 3/8-in diameter pre-oiled porous plastic discs
Gravimetric or chemical
Conductive aluminum
4.25 in (10.8 cm) - clip to exhaust
1.8 in (4.6 cm)
1.2 in (3.0 cm)
3.3 oz (93.6 gm)
Operating Instructions
863 Valley View Road, Eighty Four, PA 15330 USA
Tel: 724-941-9701 • www.skcinc.com
®
thoracic TLV
®
Series for 2 and 4 L/min
for 8 L/min
®
s.
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Summary of Contents for SKC Reusable Parallel Particle Impactor
- Page 1 4.76 mg/m and equals 50% of total dust. However, labs have reported to SKC that they prefer no more than 2 mg on the fi lter for analytical reasons. Therefore, SKC recommends that you work with your lab to determine optimum sample times for your unique sampling conditions.
- Page 2 Filters: Condition and weigh fi lters according to method used. Record the weight as the pre-sample weight. Impaction Substrate: Using an oiled impaction substrate reduces particle bounce. Replacement pre-oiled disposable porous plastic discs are available as SKC Cat. No. 225-388. See Ordering Information. Inserting a Collection Filter into the PPI The PPI will arrive already assembled.
- Page 3 Replace and tighten two screws to secure inlet plate to base plate. Tips • Use forceps to carefully insert or remove impaction substrate and collection fi lter. See Accessories for forceps. • SKC recommends using new impaction substrates for each sample period.
- Page 4 Calibration and Sampling As the particle load on the fi lter increases during sampling, the pressure drop will also increase. Therefore, use a compensating sample pump such as the AirChek Series or Leland Legacy depending on fl ow rate requirements. Calibration Calibrate pump fl...
- Page 5 Sampling SKC tests indicate that a particulate mass of up to 6.8 mg on the four impaction substrates would not affect PPI performance. This amount is equivalent to sampling for 6 hours at 4 L/min in environments where respirable mass concentration is 4.76 mg/m...
- Page 6 Removing the Collection Filter and Impaction Substrates Unscrew and remove the two screws that hold the inlet plate to the base plate. Lift off inlet plate to expose impaction plate. Use a thin, fl at implement to remove impaction sub- strates and discard them.
- Page 7 Cleaning For optimum performance, the PPI inlet and the impaction and base plates should be cleaned after fi ve runs or upon a noticeable buildup of material to remove oil and other residue built up from frequent sampling. Disassemble the PPI and wash parts in water with a liquid detergent or soap.
- Page 8 * Back pressure on PTFE fi lters can vary within the same lot. SKC Limited Warranty and Return Policy SKC products are subject to the SKC Limited Warranty and Return Policy, which provides SKC’s sole liability and the buyer’s exclusive remedy. To view the complete SKC Limited Warranty and Return Policy, go to htt p://www.skcinc.com/warranty.
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