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C
C
H
H
A
A
P
P
T
T
E
E
R
R
8
8
T
T
R
R
O
O
U
U
B
B
L
L
E
E
S
S
H
H
O
O
O
O
T
T
I
I
N
N
G
G
A
A
N
N
D
D
S
S
E
E
R
R
V
V
I
I
C
C
E
E
R
R
O
O
P
P
E
E
R
R
A
A
T
T
I
I
N
N
G
G
L
L
O
O
G
G
Refer to the following table if your filtered enclosure fails to
operate properly. If the suggested corrective actions do not solve
your problem, contact Labconco for additional assistance.
PROBLEM CAUSE CORRECTIVE ACTION
Contaminants outside
of enclosure.
Improper user
techniques for the
enclosure.
See “Certifying the Enclosure” Chapter
3 and “Safety Precautions” Chapter 4
sections in the manual. (Ref. Appendix
D).
Restriction of the
baffle air slots or
blockage of the
exhaust outlet.
Remove obstruction to ensure that all
air slots and the exhaust outlet are
unobstructed.
External factors are
disrupting the
enclosure airflow
patterns or acting as a
source of
contamination.
See “Location Requirements” Chapter
2, “Certifying the Enclosure” Chapter
3, and “Safety Precautions” Chapter 4
sections of this manual. (Ref. Appendix
D).
Enclosure has
improper face
velocity.
Have enclosure certified and check
exhaust system. Check HEPA filters for
loading. Adjust enclosure speed
control. Enclosure should have an
average face velocity of 60-100 fpm for
weighing procedures and 75-105 fpm
for biohazardous procedures.