DPM Cassette With Impactor Cat. No. 225 317 Operating Instruction Form 40081 PDF

User Manual: 40081

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Operating Instructions
863 Valley View Road, Eighty Four, PA 15330 USA
Tel: 724-941-9701 E-mail: skctech@skcinc.com

www.skcinc.com

DPM Cassette with Impactor
Cat. No. 225-317
SKC Diesel Particulate Matter Cassettes are
designed for sampling in atmospheres where it
is necessary to separate DPM, carbon nanotubes
(CNTs), and carbon nanofibers (CNFs) from
other respirable dust (such as coal dust). Singleuse disposable SKC DPM Cassettes are tamperevident sealed to ensure sample integrity. Each
streamlined plastic cassette comprises an impactor
with precision sapphire orifice, impaction
substrate, and two heat-treated quartz filters. The
impactor screens out respirable particles ≥ 1.0 μm.
Particles less than 1.0 μm are collected on the first
filter and the second filter serves as a dynamic
blank for correction of absorbed organic carbon.
Samples are analyzed for organic and elemental
carbon content of DPM per NIOSH Method 5040
or for CNTs and CNFs; see NIOSH CIB 65.

Plug
Outlet

Support
pad
Heat-treated
quartz filter
Heat-treated
quartz filter
Stainless steel ring
(defines filter area)
Impactor
assembly
Cassette
body
Inlet
Plug

Performance Profile
Cassette Size:
Filter:
Filter Collection
Area:
Impactor:
Flow Rate:
Analysis:

37 mm
Two heat-treated quartz fiber
with cellulose support pad

Figure 1. Exploded view of
DPM Cassette
(Cat. No. 225-317)

8.04 cm2
Four-nozzle, precision sapphire orifices
Calibrated at 1.7 and 2.0 L/min for sampling of submicron
particles
For organic and elemental carbon using evolved gas analysis
(EGA) with thermal-optical analyzer (NIOSH 5040) and
electron microscopy (NIOSH CIB 65)

Sampling Equipment
The SKC DPM Cassette is designed for use with an appropriate sample pump and
cyclone that pre-selects non-respirable particles.* An SKC Universal XR or AirChek®
Series sample pump can provide the specified flow rate. Use SKC Cassette/Cyclone
Holder Cat. No. 225-1 to secure the cassette when used with the GS-1 Cyclone.
* A cyclone is not necessary in all sampling situations. It should be used in settings where larger particulate is likely to clog
the impactor.

Setting Up the Sampling Train with Cyclone and Holder
1.

Insert stem of GS-1 Cyclone into large hole in cassette holder.

2.

Orient cyclone in holder until the small round nodule on the bowl adapter
rim fits into the notch in the cassette holder.

3.

Remove inlet and outlet plugs from a DPM Cassette, pull back spring-loaded
hold-down plate on cassette holder, and gently push inlet of cassette onto
top of cyclone.

4.

Position small hole in hold-down plate over cassette
outlet.

5.

Insert Luer adapter on the holder's rubber tubing into
cassette outlet.

Figure 2. DPM Sampling Train with GS-1 Cyclone,
Cassette Holder, and Universal PCXR4 Pump

AIRCHEK

SAMPLER

UL

SAMPLE PERIOD — MINUTES
START
HOLD

FLOW
AND
BATTERY
CHECK

LISTED 124U

®
INTRINSICALLY SAFE
PORTABLE AIR SAMPLING PUMP
FOR USE IN HAZARDOUS LOCA
TIONS CLASS I, GROUPS A B C D
AND CLASS II, GROUPS E F G
AND CLASS III, TEMPERATURE
CODE T3C.

WARNING - SUBSTITUTION OF
COMPONENTS MAY IMPAIR INTRIN
SIC SAFETY. USE ONLY UL LISTED
PORTABLE AIR SAMPLING PUMP
BATTERY PACK MODEL P21661
ON

4
3

AIRCHEK SAMPLER
MODEL 224-PCXR8

FLOW

5

SERIAL NO.
SKC INC.
EIGHTY FOUR

PA

15330

ADJ

Setting Up the Sampling Train Without a Cyclone
1.

Remove the plug from the outlet of the cassette (Figure 1).

2.

Attach one end of a length of Tygon® tubing to the cassette outlet and the
other end to the inlet of an air sample pump capable of maintaining the
desired flow rate.

3.

Secure the cassette on a worker by using a cable tie and collar clip.

4.

Remove plug from the cassette inlet immediately before sampling.

2
1

Calibration
1.

Prepare a DPM Cassette or cyclone/DPM Cassette assembly. If using a
cyclone, 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.

3.

Place DPM Cassette or
cyclone/DPM Cassette
assembly into an airtight
calibration jar that
contains an inlet and
outlet (SKC Cat. No.
225-111). See Figure 3.
Using flexible tubing,
connect inlet of calibrator
to inlet of calibration jar.

0.000
L/minute

Figure 3. Calibration Train with Jar

4.

Run tubing from outlet of DPM Cassette or cyclone/DPM Cassette assembly
through outlet of calibration jar and to the inlet of a sample pump. If using
the SKC Cat. No. 225-111 jar, connect the Luer adapter inside the jar to the
cyclone/cassette outlet. Connect jar outlet to inlet of a sample pump.

5.

Turn on pump and calibrate to desired flow rate following directions in the
pump and calibrator operating instructions.

6.

After calibration, disassemble calibration jar, remove the DPM Cassette
or cyclone/DPM Cassette assembly, and replace DPM Cassette used for
calibration with a fresh (unused) cassette to be used for sampling.

Sampling
1.

Ensure pump is calibrated to the appropriate flow rate. See Calibration.

2.

Turn on pump and sample for the appropriate time.

3.

When sampling is completed, turn off the pump, remove the DPM Cassette
or cyclone/DPM Cassette assembly from the holder, remove the cassette from
the cyclone, and immediately plug both the inlet and outlet of the cassette
with the provided plugs.

Shipping
Package the cassettes for shipment to a laboratory for analysis.

Analysis
Total carbon represents more than 80% of DPM particulate emissions. NIOSH
5040 can be used to quantitatively determine the total carbon (organic and
elemental) content of the sample.

Ordering Information
Description
SKC DPM Cassette with Impactor, contains two 37-mm
heat-treated quartz filters, tamper-evident sealed, single
use,† meets NIOSH 5040 specifications, average sampler
deposition area is 8.04 cm2, pk/10
Limited shelf-life
SKC GS-1 Cyclone,* single inlet, 10 mm, conductive plastic
Filter Cassette/Cyclone Holder, for attaching a DPM or
standard filter cassette to a worker’s clothing in the breathing
zone. May be used with or without a cyclone, required when
using DPM Cassette with GS-1 Cyclone
Tubing, Collar Clip, and Cable Tie includes 3 feet of Tygon
tubing (1/4-inch ID) and alligator clip attached to a nylon cable tie
Multi-purpose Calibration Jar

Cat. No.

225-317
225-105

225-1
225-13-8
225-111

* A cyclone should be used in settings where larger particulate is likely to clog the impactor.
† Requires 1/4-inch tubing for filter cassette/cyclone holder

SKC also offers DPM cassettes without impactors. For more information,
see www.skcinc.com/prod/225-317.asp.

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 http://www.skcinc.com/warranty.asp.

Form 40081 Rev 1703



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Keywords                        : DPM, Cassette, with, Impactor, Cat., No., 225-317, Operating, Instruction, Form, 40081, PDF, Document
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Title                           : DPM Cassette with Impactor Cat. No. 225-317 Operating Instruction Form 40081 PDF Document
Creator                         : SKC Inc.
Description                     : DPM Cassette with Impactor Cat. No. 225-317 Operating Instruction Form 40081 PDF Document
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