Labconco Type C1 Biosafety Cabinet Models 30468 - Manual (Page 77)

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If the Axiom is Contaminated
(An upstream concentration cannot be established)
If the Axiom has been used with biohazardous, toxic chemicals, or radioisotopes, the
DOP access line cannot be used. The upstream concentration cannot be measured
directly. Testing at Labconco has shown the actual concentration varies from the
calculated value. Table 5-1 shows the actual vs. calculated concentrations for the Axiom
models.
Table 5-1
Supply HEPA Filter Leak Test Specifications
Model 3044- 3046-
Air Displacement (CFM) 520 665
Laskin Nozzles needed 1 1
Theoretical aerosol conc.
(ug/l)
1
26 20
Actual aerosol conc. (ug/l)
1
13 12
1. The calculated concentration was established by the formula:
Concentration (ug/l) = (# Laskin nozzles @ 20 PSIG x 13,500)/Volume of air displaced
2. Based on Mineral oil
If the Axiom is Uncontaminated
(Establishing an Upstream Concentration)
The Axiom utilizes an aerosol access tube for sampling the upstream concentration of
aerosol. If after reading these instructions, you have further questions, please contact
Labconco's Product Service Department.
1. Remove the center work surface by lifting the handles on either wing work
surface. Pull the center work surface straight out of the Axiom. Repeat for the
right wing work surface.
2. Locate the access tube on right side of the rear plenum wall, passing through the
towel catch. As shown in Figure 5-2.
Figure 5-2