PS Magazine - TB 43-PS-593
PS, The Preventative Maintenance Monthly
ISSUE 593
APRIL 2002
Zeroing Problem
If your PATS won't zero, you could
have a bad HEPA filter. Bad filters
have turned up in the field. Take off
the filter and use the backup filter. If
your PATS then zeroes, the first filter
was bad. Order a new filter with NSN
4240-01-340-3715. If the backup filter
doesn't make any difference, support
should check out your PATS.
T
rue
T
esting
Put the PATS down and put the alco-
hol cartridge back in. Run PATS anoth-
er hour and check if it now counts par-
ticles. Still no luck? Try the procedure
one more time.
No change? Let the PATS sit
overnight with the alcohol cartridge in
place. Start the PATS in the morning to
see if it works. If there's still no change,
the PATS needs to go to support.
PS 593
APR 02
48
M41 PATS…
PATS PM
for
H
elp your M41 protection assessment test system (PATS) pass the test for accurate
mask testing, NBC NCOs, by studying these two points:
Counting Problem
If your PATS hasn't been used in
6 months or more and won't count
particles, it may need some run-
ning time to clear the inlet nozzle.
Let the PATS run for several hours
in the count mode if necessary. The
complete procedure's on Page 0014
00-1 in TM 3-4240-349-12&P.
If that doesn't clear it, remove
the alcohol cartridge from the
PATS. Hold the PATS so the sam-
ple ports point up. Find the small
hole at the base of the cartridge
cavity. Put 2-3 tiny drops of iso-
propyl alcohol in the cavity. Hold
the PATS pointing up until all the
alcohol drains into the small hole.
It takes about 90 seconds.
Hold so sample
port points up
Put 2-3
drops of
alcohol in
cavity
Let PATS sit
overnight
with cartridge
installed
let’s see
if you
work
now!
If you don’t, I’m
afraid I’m going to
have to send you
to support!!
We’ll try
it again
tomorrow.
Get some
rest.
this is the
[puff] third
time you
tested me…
[puff]
Do I
pass?!
you’re still
not working!
Try different filters
if PATS won’t zero
… 1:37.1
… 1:37.2
… 1:37.3
… 1:37.4
I’m
counting
and
running!
593. 48-49 (C)
2/21/02
9:38 AM
Page 1
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