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Fig. 15-1 Attaching airflow
indicator
Chart 1: Determining airflow indicator zone based on elevation and temperature. Recommended
use temperature range: 23°F to 131°F (-5°C to 55°C). Recommended elevation: -328 feet to 16404
feet (-100 meters to 5000 meters). Contact 3M Technical Service if intended use may be outside of
these ranges.
NOTE: If the airflow indicator ball fails to rise at or above the minimum flow level, do not use
the motor/blower unit. Refer to the 3M™ Versaflo™ Powered Air Purifying Respirator TR-600
Troubleshooting Guide or contact 3M Technical Service.
7. Low flow alarm check: Check the low airflow alarm by simulating a low airflow condition. With the
motor/blower on:
• Remove the airflow indicator and tightly cover the outlet of the motor/blower with the palm of
your hand. The motor should automatically speed up, attempting to compensate for the low
airflow condition.
• Continue to press your palm tightly against the end of the outlet, making a tight seal. In less than
approx. 30 seconds, the unit will sound an audible and vibratory alarm, and the bottom bar on the
filter loading/low flow indicator will flash red. (Fig 13-5).
Fig. 15-2 Checking airflow
°C -10 0
10 20 30 40 50
°F
m
14 32 50 68 86 104 122
ft
-610
-2000
A
B
-305
-1000
A
B
C
0
0
B
C
D
305
1000
C
D
E
610
2000
D
E
F
914
3000
E
F
G
1219
4000
F
G
H
1524
5000
G
H
I
1829
6000
H
I
J
2134
7000
I
J
K
2438
8000
J
K
L
2743
9000
K
L
M
3048
10000
L
M
N
3353
11000 M
N
O
3658
12000
N
O
P
3962
13000 O
P
Q
4267
14000
P
Q
R
4572
15000 Q
R
S
4877
16000
R
S
T
5182
17000
S
T
U
14
C
D
E
F
D
E
F
G
E
F
G
H
F
G
H
I
G
H
I
J
H
I
J
K
I
J
K
L
J
K
L
M
K
L
M
N
L
M
N
O
M
N
O
P
N
O
P
Q
O
P
Q
R
P
Q
R
S
Q
R
S
T
R
S
T
U
S
T
U
V
T
U
V
W
U
V
W
X
V
W
X
Y
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