INSTRUCTIONS FOR USE AND CARE
The C420 PAPR must be properly prepared for use, flow
t
ested, properly donned, and a negative pressure leak test
must be conducted in an area known to be free of conta-
m
inants before it can be used.
Before entry into a contaminated area, the maximum safe
duration of use must be estimated. The maximum safe
duration of use depends primarily on:
•
The amount and type of contamination in the air and
the capacity of the cartridge to absorb or neutralize
that contaminant.
• The amount of airborne particles (dust) in the atmos-
phere.
• The charge contained in the battery.
• The physiological limits of the respirator user.
The maximum expected cartridge life shall be predeter-
mined based on a determination of the amount of conta-
minant in the atmosphere and the capacity of the car-
tridges together with the expected air flow through the
cartridges. An average airflow of approximately two cubic
feet per minute (2 CFM) will flow through each cartridge
during prolonged use.
The single use battery may be used up to eight (8) hours
u
nder certain conditions. The rechargeable battery may
be used for up to four (4) hours under certain conditions.
A
ir flow must be checked as described in these instruc-
tions for maximum protection.
After four (4) hours of use, the user must leave the conta-
minated area, decontaminate if required, and check the
a
irflow with the Airflow Indicator (Refer to the Flow Test
with Cartridges Installed section) when using the single
use battery. Thereafter, the air flow must be checked at
least every two (2) hours of use. (Refer to the In-Use Flow
Test section) After four (4) hours of use the user must
leave the contaminated area, decontaminate if required,
and discontinue using the respirator when using the
rechargeable battery.
6
TAL 706 (L) Rev. 2 - 10072074
To Next Page
Loading...
