SKC 225-9005 Preloaded Coated Filter User Manual
SKC Hardware
Preloaded Coated Filters
Cat. No. 225-9005
SKC coated fi lters are shipped preloaded in the cassett es with end plugs and
shrink bands in place. No assembly is required; they are ready to use.
Method & Chemical: NIOSH 6004 (modifi ed — single 3-piece cassett e re-
places two 2-piece cassett es in series following 1993 NIOSH revisions) for
sulfur dioxide
Filter & Coating: Mixed cellulose-ester pre-fi lter with support pad and cel-
lulose fi lter coated with sodium carbonate with support pad. Three-piece
37-mm cassett e. Closed-face sampling confi guration
Prior to Sampling: Store at 71.6 F (22 C) for up to one year.
Sample Stability: No storage stability data is available.
For information on other available
coated fi lters, request SKC Publication 1219.
Operating Instructions
863 Valley View Road, Eighty Four, PA 15330
Tel: 724-941-9701 Fax: 724-941-1369
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
How to Use the SKC Preloaded Coated Filters
1. Select one coated fi lter cassett e for calibrating the fl ow rate. A red plug
secures the inlet, which is clearly marked “inlet,” and a blue plug secures the
outlet. Set up the sampling train for calibration with the representative fi lter
cassett e in line. For “closed-face” sampling, remove the plugs and connect the
cassett e to the sampling train. For “open-face” sampling, remove the outlet
plug and the cassett e inlet section then connect the cassett e to the sampling
train. For details on sett ing up a sampling train, refer to the SKC Sample Setup
Guide “Sampling Train - Filters and Cyclones” (SKC Publication 1166).
2. Calibrate the pump to the desired fl ow rate using a fi lm fl owmeter or
calibrated precision rotameter. For details on calibrating a pump, refer to the
SKC Sample Setup Guide “Calibrating a Pump Using a Film Flowmeter” (SKC
Publication 1163).
3. Replace the cassett e used for calibration with a fresh coated fi lter cassett e
for sample collection. Att ach the cassett e to a worker’s collar, as close to the
breathing zone as possible, by using a fi lter cassett e holder (SKC Cat. No.
225-1). Sample for the specifi ed time interval and record the time.
4. Remove the fi lter cassett e at the end of the specifi ed sampling period and
replace both end plugs (and the inlet if necessary). Recheck the fl ow rate using
the same cassett e and fl owmeter used for calibration (in Step 2) to ensure that
the fl ow rate has not changed by more than 5%.
5. Appropriately package fi lter cassett es and ship the samples, blanks, and all
pertinent data to a laboratory for analysis.
Form 40034 Rev 1303