PS Magazine - TB 43-PS-694
PS, The Preventative Maintenance Monthly
ISSUE 694
SEPTEMBER 2010
50
PS 694
SEP 10
51
PS 694
SEP 10
Unfortunately, PATS calibration is being widely ignored by CBRN specialists.
The Army reports a huge drop in the number of PATS coming in for calibration.
If you CBRN specialists ignore the PATS calibration requirement, it will cause
you even more work trying to Fgure out why your unit’s masks are flunking the
PATS test.
Save yourself trouble by making sure PATS
is sent off to TMDE for calibration every 18
months.
TMDE
completely
disassembles
PATS, cleans it, checks out all components
and accessories and repairs them if necessary,
and re-calibrates it. They also install a
diagnostic upgrade. When they’re Fnished,
PATS is better than new.
It’s easy to tell if your PATS is ready for a
trip to TMDE. Look at its calibration sticker.
It gives the due date for the next calibration.
If it’s missing the sticker, your TMDE should
have a record of when the PATS was last
calibrated.
I
f the DT-236 dosimeters, NSN 6665-01-043-2191, for the AN/PDR-75 radiacmeter
have been sitting for a long time, they may have lost their accuracy. If that’s the case,
the dosimeters will give readings on the CP-696/PDR-75 computer indicator that are
out of tolerance on the low side.
If your dosimeters have been sitting, they may need a simple cleaning to correct the
problem. CBRN specialists, to check if a dosimeter needs cleaning, open it following
the procedure in Para 2.6 of TM 11-6665-236-12. With the cover removed, see if the
phosphate glass is clear. If the glass is clear, the dosimeter doesn’t need cleaning. Put
it back together.
But
a
milky
white
coating
on
the surface of the glass means the
dosimeter base needs cleaning. Place
the dosimeter base in a solution of warm
water and liquid dishwashing detergent
and let it soak for 5-10 minutes. Rinse
the dosimeter base in plain water and
let it dry completely. If the glass is now
clear, reassemble the dosimeter. If it’s
not clear, repeat the cleaning process
until it is clear.
To make sure your dosimeter keeps
working correctly, remember to check
it annually like the TM says.
M41 PATS…
No Calibration
Flunks
Good Masks
AN/PDR-75 Radiacmeter…
Dosimeter Been
Sitting?
It May Need a
Bath!
the m41 pats
(protection
assessment test
system) won’t stay
accurate forever.
if pats goes year
after year without
calibration, it starts
flunking perfectly
good masks.
Check sticker for next
calibration due date
Soak dosimeter base in warm,
soapy water until glass is clear
gee, I’ve
been sitting
for months!
I really need a
bath if I’m going
to be accurate!
mask,
what
mask?
I don’t
see any
mask!
I think this
pats is
overdue for
calibration.
694.50-51.indd
1-2
7/23/10
1:46:40 PM
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