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.

Calibration

Option 1: Using a Calibration Jar (Figure 3)

1. Prepare a DPM Casse e or cyclone/DPM Casse e 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 225-1 during calibration.

2. Place DPM Casse e or
cyclone/DPM Casse e
assembly into an airtight
calibration jar that
contains an inlet and
outlet (SKC Cat. No. 225­111, see Figure 3).

3. Using fl exible tubing,
connect inlet of calibrator
to inlet of calibration jar.

4. Run tubing from outlet of DPM Casse e or cyclone/DPM Casse e assembly
through outlet of calibration jar and to the inlet of a sample pump. If using
the SKC 225-111 jar, connect the Luer adapter inside the jar to the cyclone/
casse e outlet. Connect jar outlet to inlet of a sample pump.

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

Figure 3. Calibration Train with Jar

6. A er calibration, disassemble calibration jar, remove the DPM Casse e
or cyclone/DPM Casse e assembly, and replace DPM Casse e used for
calibration with a fresh (unused) casse e to be used for sampling.

Option 2: Jarless Calibration (Figure 4)

This calibration option is recommended
when using a Defender primary
standard calibrator to calibrate
personal air sample pumps for size­selective particulate sampling using
particulate samplers that do not have
their own calibration adapters.

Figure 4. Jarless Calibration with DPM Cassette and

AirChek XR5000 Pump

1. Use a length of fl exible tubing to a ach the inlet of the sample pump to the
suction port of a Defender calibrator.

2. Use the shortest length of tubing possible to a ach the outlet of the DPM
Casse e or cyclone/DPM Casse e assembly to the pressure port of the
Defender.

3. Set the Defender to take at least 20 fl ow measurements in order to average
out the fl ow variations caused by direct connection of the pump to the
calibrator. See calibrator operating instructions for details.

Sampling

1. Ensure pump is calibrated to the appropriate fl ow 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 Casse e
or cyclone/DPM Casse e assembly from the holder, remove the casse e from
the cyclone, and immediately plug both the inlet and outlet of the casse e
with the provided plugs.

Shipping

Package the casse es for shipment to a laboratory for analysis.

Analysis

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

Ordering Information

Description Cat. No.

SKC DPM Cassette with impactor, contains two 37-mm

heat-treated quartz fi lters, tamper-evident sealed, single

†

use,

meets NIOSH 5040 specifi cations, average sampler

deposition area is 8.04 cm

Limited shelf-life 225-317
SKC GS-1 Cyclone,* single inlet, 10 mm, conductive plastic 225-105
Filter Cassette/Cyclone Holder, for attaching a DPM or

standard fi lter 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 225-1
Tubing, Collar Clip, and Cable Tie includes 3 feet Tygon tubing
(1/4-inch ID) and alligator clip attached to a nylon cable tie 225-13-8
Multi-purpose Calibration Jar 225-111

2

, pk/10

* A cyclone should be used in se ings where larger particulate is likely to clog the impactor.
† Requires 1/4-inch tubing for fi lter casse e/cyclone holder

SKC also off ers DPM casse es 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 h p://www.skcinc.com/warranty.
asp.

Form 40081 Rev 1401