Labconco FilterMatPortable Exhausters 3970024 - Manual (Page 38)

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Chapter 5: Maintaining Your FilterMate
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FilterMate HEPA Filter Leak Test
Purpose
After the Bag-In/Bag-Out procedure, the HEPA filter
should be leak checked. This test is performed to
determine the integrity of the HEPA filter, the filter
housing, and the filter mounting frames. Leak test is to be
done by qualified technician with calibrated equipment.
Remove the exhaust cover by first removing the hole plug
and then using a Phillips screw driver to unfasten the (4)
captive screws. See Figure 3-3 and 3-5. The filter passes
at .01% or better. Reference Leak Testing and Photometer
scanning from the Institute of Environmental Services
(IES-RP-CC001.3)
Apparatus
1. An aerosol photometer ATI model 2D, 2E, 2G or
equivalent. Air Techniques Hamilton Associates inc. 11403
Cron Ridge Dr. Owings Mills, MD 21117
2. One aerosol generator of the Laskin nozzle(s) type. An
aerosol of mineral oil shall be created by flowing air through it.
The compressed air supplied to the generator should be
adjusted to a pressure of 20 +/- 1 psig. during operation. Air
Techniques Inc. Model TDA-4A or equal. One nozzle is (135
cfm x 100ug/l)/(Vol. of air), one nozzle @ 20 psig is
13,500/380 cfm = 36ug/l or 13,500/280 cfm = 48ug/l for the
FilterMate connected to the enclosure.
3. Mineral oil (Catalog #1491400).
4. Sampling Nozzle, Rectangular 1/2" x 3-1/4", Air Techniques,
Inc.
Procedure
For the ATI 2G Photometer
1. Turn on the photometer and allow it to operate for a
minimum of 5 minutes. Leave the valve in the
“CLEAR” setting.
2. Press the “ENTER” keypad. Press the “REF”
keypad.
3. The display will display “P1” for approximately 1
second, and then display a numerical value.
HEPA