POWER SUPPLY / CONTROL UNIT
Figure 11-3. AN/PDR-65 radiac set.
t h e D T- 6 0 / P D i s i n s e r t e d i n t o t h e r a d i a c
DT-60/PD.-- The DT-60/PD (fig. 11-4) is a gamma
c o m p u t e r - i n d i c a t o r. E a c h o f t h e s e r a d i a c
radiation dosimeter with a usable range of 10 to 600 R.
computer-indicators has two scales: 0 to 200 R and 0 to
The DT-60/PD is a solid-state package in the form of a
600 R. However, 10 R is the minimum detectable
locket designed to be worn on a chain around the neck.
exposure. These units have an accuracy rate of
Inside the black plastic casing of the DT-60/PD is a
20 percent. The radiac computer-indicators operate
phosphate glass. When the phosphate glass is exposed
off the ship's 115 vac power source.
to ultraviolet light, it emits an orange light. The intensity
of the orange light is proportional to the amount of
radiation the glass has received. The DT-60/PD stores
the dose information indefinitely and is a permanent
record of the amount of exposure to radiation.
NOT IN U
Figure 11-5. Radiac computer-indicator CP-95A/PD.
READY TO WEAR
IM-9/PD.-- The IM-9/PD (series E through H) is a
Figure 11-4. High range or casualty dosimeter
self-reading pocket dosimeter of the quartz-fiber type.
This unit indicates the gamma radiation dose in the
range of 0 to 200 mR. By holding the dosimeter up to
CP-95A/PD.-- The CP-95A/PD (fig. 11-5) is a
the light and looking through the lens (fig. 11-6), you
radiac computer-indicator that is used to read the
can read the radiation dose received. The reading is
amount of radiation a DT-60/PD has been exposed to.
The cover on the DT-60/PD must be removed before
obtained by observing the position of the quartz fiber