SKC 225-317 User Manual

Operating Instructions

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863 Valley View Road, Eighty Four, PA 15330 USA

DPM Cassette with Impactor

Catalog No. 225-317

SKC Diesel Particulate Matter Cassettes are
designed for sampling in atmospheres where
it is necessary to separate DPM from other
respirable dust (such as coal dust). Single-use
SKC DPM Cassettes are tamper-evident 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 filter. Samples are analyzed for organic
and elemental carbon content using a highly
sensitive Evolved Gas Analysis (EGA) technique
with thermal-optical analyzer as specified in
NIOSH 5040.

www.skcinc.com

Plug

Outlet

Support
pad

Heat-treated
quartz fi lter

Heat-treated
quartz fi lter

Stainless steel ring
(defi nes fi lter area)

Impactor
assembly

Cassette
body

Inlet

Plug

Performance Profi le

Casse e Size: 37 mm
Filter: Two heat-treated quartz fi ber

Figure 1. Exploded view of

DPM Cassette

(Cat. No. 225-317)

with cellulose support pad
Filter Collection
Area: 8.04 cm

2

Impactor: Four-nozzle, precision sapphire orifi ces
Flow Rate: Calibrated at 1.7 and 2.0 L/min for sampling of sub-micron

particles

Analysis: For organic and elemental carbon using evolved gas analysis

(EGA) with thermal-optical analyzer (NIOSH Method 5040)

Sampling Equipment

The SKC DPM Casse e is designed for use with an appropriate sample pump and cyclone
that pre-selects non-respirable particles*. An SKC Universal XR, AirChek® 2000, or AirChek
XR5000 sample pump can provide the specifi ed fl ow rate. Use the SKC Casse e/Cyclone
Holder (Cat. No. 225-1) to secure the casse e when used with the GS-1 Cyclone.

* A cyclone is not necessary in all sampling situations. It should be used in se ings 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 casse e holder.

2. Orient cyclone in holder until the small round nodule on the bowl adapter
rim fi ts into the notch in the casse e holder.

3. Remove inlet and outlet plugs from a DPM Casse e, pull back spring-loaded
hold-down plate on casse e holder, and gently push inlet of casse e onto
top of cyclone.

4. Position small hole in hold-down plate over casse e
outlet.

5. Insert Luer adapter on the holder's rubber tubing into
casse e outlet.

AIRCHEK

Figure 2. DPM Sampling Train with GS-1 Cyclone,

Cassette Holder, and Universal PCXR4 Pump

SAMPLER

SAMPLE PERIOD — MINUTES

START

HOLD

U

LISTED 124U

5

L

®

INTRINSICALLY SAFE
PORTABLE AIR SAMPLING PUMP
FOR USE IN HAZARDOUS LOCA
TIONS CLASS I, GROUPS A B C D

4

AND CLASS II, GROUPS E F G

FLOW

AND CLASS III, TEMPERATURE

AND

CODE T3C.

BATTERY
CHECK

ON

FLOW

ADJ

AIRCHEK SAMPLER
MODEL 224-PCXR8

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

SERIAL NO.
SKC INC.
EIGHTY FOUR PA 15330

3

2

1

Setting Up the Sampling Train without a Cyclone

1. Remove the plug from the outlet of the casse e (Figure 1).

2. A ach one end of a length of Tygon® tubing to the casse e outlet and the
other end to the inlet of an air sample pump capable of maintaining the
desired fl ow rate.

3. Secure the casse e on a worker by using a cable tie and collar clip.

4. Remove plug from the casse e inlet immediately before sampling.