MSA Advantage 4000 Series Operation And Instructions Manual page 7

D. MIXTURES OF CONTAMINANTS – This gas mask can
be used for protection against a mixture of contami-
nants that are present simultaneously or alternately
against one contaminant then another (using the same
canister) if the mixture meets the following conditions:
1. The canister must be approved for all contaminants
present.
2. NIOSH permits mixing of the following contami-
nants: organic vapors, chlorine, chloride dioxide,
hydrogen sulfide, acid gases, ammonia, and carbon
monoxide.
3. Particulates can be mixed with any other particulate
or any gas or vapor for which the canister is
approved.
4. Contaminants present simultaneously must be
below IDLH levels for the specific contaminants. If
any one contaminant in the mixture exceeds the
IDLH concentration, then the entire mixture must be
treated as IDLH and the respirator cannot be used
(except for escape when using respirator in a gas
mask configuration).
5. Mersorb-P100 cartridges can be used against a
mixture of chlorine and mercury that are both pre-
sent simultaneously, but cannot be used if alternat-
ing between mercury-contaminated atmospheres
and chlorine-contaminated atmospheres.
E. TIME USE LIMITATION
1. Canisters and cartridges with an N95 or R95filter
shall be limited to 8 hours of use (continuous or
intermittent) against particulates. (Service time can
be extended by performing an evaluation in the
specific workplace setting that demonstrates (a)
that the extended use will not degrade the filter effi-
ciency below 95%, or that the total mass loading of
the filter is less than 200mg for a single canister
application or less than 100 mg each for a dual car-
tridge application).
2. GMHF-C-P100 and Hydrogen Fluoride/P100:
Canister must be replaced after each use against
hydrogen fluoride (not to exceed 8 hours) to ensure
the integrity of the P100 filter.
F. MULTI-USE LIMITATIONS (OptiFilter XL only)
1. Approved as a high efficiency particulate air filter on
approved Powered Air Purifying Respirators. Also,
approved as a P100 filter, but ONLY when used with
an approved negative pressure respirator. Do not
exceed maximum use concentrations established
by regulatory standards.
GENERAL DESCRIPTION
EXPOSURE LIMITS
A listing of applicable exposure limits from the following
sources is provided in MSA's Response
Selector: available online at www.MSAnet.com.
•
•
•
•
EXPOSURE LIMITS FOR MIXTURES
The American Conference of Governmental Industrial
Hygienists (ACGIH) publishes the following information to
determine the TLV of a mixture.
First, determine the total concentration of the chemical
mixture (C Mixture ) from the individual contaminant con-
centrations (C 1 , C 2 , C 3 ...) using the following formula:
The TLV of the mixture is found by using the following for-
mula where T 1 , T 2 , T 3 , ... are the individual contaminant
TLVs and C 1 , C 2 , C 3 ... are the individual contaminant
concentrations:
Only use these equations if the contaminants 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 pre-
sent must be used to determine the appropriate respirator
category for protection against all contaminants present.
See MSA's Response
information.
7
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.
C
T
mixture
C
1
+
T
1
® Respirator Selector for additional
® Respirator
mixture
C C
2 3
+
T T
2 3
TAL 018 (L) Rev. 6 - 10073772