MSA OptimAir MM 2K, Инструкция пользователя

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TAL 0110 (L) Rev. 8 - 10020949
DESCRIPTION
ed in a negative-pressure mode (with
blower off). This will cover use of the
respirator in the powered air-purifying
mode operation.
EXPOSURE LIMITS
A listing of acceptable exposure limits
from the following sources:
•
American Conference of
Governmental Industrial Hygienists
(ACGIH)
• Occupational Safety and Health
Administration (OSHA)
• National Institute for Occupational
Safety and Health (NIOSH)
• American Industrial Hygiene
Association (AIHA)
Contact MSA at 1-800-MSA-2222 for
information.
Exposure Limits for Mixtures
The American Conference of Govern-
mental Industrial Hygienists (ACGIH)
publishes the following information to
determine the TLV of a mixture.
First determine the total concentration
of the chemical mixture (CMixture) from
the individual contaminant concentra-
tions (C1, C2, C3,…) using the following
formula:
CMixture = C1 + C2 + C3 + …
The TLV of the mixture is found by
using the following formula where T1,
T2, T3,… are the individual contaminant
TLVs and C1, C2, C3,… are the individ-
ual contaminant concentrations:
Only use these equations if the contam-
inants present are actually mixed. Some
substances do not mix and may be
present separately, for example, in
pockets or at different levels. In that
case, the lowest TLV of the substances
present must be used to determine the
appropriate respirator category for pro-
tection against all contaminants pres-
ent.
8
T
Mixture
=
C
Mixture
+ + + . . .
T
1
T
2
T
3
C
1
C
2
C
3