Owner's manual

Page 197 of 197

Section Twelve –

Cell

Logic

Certification

The Cell Logic models are Type A2 and B2 Logics modified for use with a microscope

and/or the addition of a temperature-controlled work surface area. These units should

be treated the same as their corresponding Logic models with the following exceptions

noted:

1. Type A2 Cell Logics have a 9-inch sash opening. Refer to the following table for

inflow requirements:

Model 34309 34409 34509 34609

Cabinet Size (in feet) 3 4 5 6

Sash Opening (inches) 9 9 9 9

Starting Serial #

0705_ 0705_ 0705_ 0705_

Nominal Avg. Downflow (FPM) 55+/-5 55+/-5 55+/-5 55+/-5

Nominal Average Inflow (FPM) 105+/-5 105+/-5 105+/-5 105+/-5

Sash Open Area (Sq. Ft.) 2.28 3.03 3.78 4.53

Nominal Avg. Exhaust Vol. (CFM)

239 318 399 476

Avg. Exhaust Vol. Range (CFM) 228-251 303-333 378-416 453-498

2. The downflow velocity profile can be measured with a microscope in place,

simply omit those velocity points that are under or obstructed by the microscope

base.

3. On Cell Logic models equipped with the microscope sash, the secondary inflow

methodology is similar to that of the corresponding Logic model with the

following changes:

a. With the microscope disconnected from the sash seal, the holes in the

seal must be plugged.

b. The sash is lowered to the height specified for the corresponding Logic

model.

c. The probe height is the same as the corresponding Logic model.

d. When establishing the test point locations on the front grille, use the

same methodology as with the Logics, except the two center test points

are not used.

e. The correction factor for 5-foot Cell Logics with a microscope sash is 1.0.