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Type B2 Exhaust HEPA Filter Leak Test
All Logic+ models were tested to the HEPA Filter Leak Test as described in ANSI/NSF
Standard 49:2012.
Note: ensure all internal surfaces of the Logic+ have been appropriately
decontaminated before proceeding.
Note: If so equipped, the prefilter element on the towel catch should be
removed, and the aerosol generator should be placed nearby to inject the
aerosol as shown in Figure 5-15.
Figure 5-15
Testing at Labconco has shown the actual concentration varies from the calculated
value. Table 6-2 shows the actual vs. calculated concentrations for the B2 models.
Table 5-3
Type B2 Exhaust HEPA Filter Leak Test Specifications
Theoretical aerosol conc.
(ug/l)
1
Actual aerosol conc. (ug/l)
1
3. The calculated concentration was established by the formula:
Concentration (ug/l) = (# Laskin nozzles @ 20 PSIG x 13,500)/Volume of air displaced
4. Based on Mineral oil
1. Turn on the photometer and allow it to operate for a minimum of 5 minutes.
Leave the valve in the “CLEAR” setting.
2. Check the oil level of the generator – it must be within 1/8” of the level line
when the generator is sitting level.
3. Establish the 100% and 0% concentration levels for the photometer.
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