c. Carefully place the tester on its end or side.
d. Moisten the cotton swab in the
e. Swab the ring which is located on the bottom
of the tester. Do not swab the source rod or the shutter.
f. Place the cotton swab on the sheet of plastic
g. Return the tester to its upright position. (See
Figure 4-3. Swabbing the Spot
k. Reinstall the display panel in the tester and
tighten the four screws.
I. The swab shall be tested for radiation in an
area where background radiation averages 0.04 mrem/hr
(1) Adjust the radiac meter AN-PDR/27 or
equivalent to measure 0 to 0.5 mrem/hr.
(2) Open the cover end of the radiac meter's
(3) Do not touch the swab to the meter's probe.
Place the swab about 0.25 inch in front of the probe and
Figure 4-2. Swabbing the Ring
note the meter reading.
h. Loosen the four screws which are located in
the corners of the tester's display panel. Lift the panel out
A tester is contaminated when a reading of 0 I
of the tester and support it on the case. (See Fig. 4-3).
mrem/hr or more (or in the case of Colorado 0.2
i. With the same swab that was used in e above,
mrem/hr or more) is obtained from the swab.
swab the red spot which is located within the tester and
next to the internal radiation detector. The spot to be
The swab is also contaminated.
swabbed may not be painted red in some testers. (See
The tester shall immediately be withdrawn from
use when the wipe test indicates a reading of 0.1
j. Wrap just the cotton swab and an inch or two
mrem/hr. (or in the case of Colorado 0.2
of the stick with plastic wrap. Seal the plastic wrap
mremlhr) or when the laboratory test results
around the stick with cellophane tape.
reveal the presence of 0.005 or more
m. Cut off the applicator stick at the tape seal.
n. If a swab reading greater than 0.4 mrem/hr