Tabulated Data - TM-11-6665-245-120009

TM 11-6665-245-12

areas. The x-ray probe contains a wire screen to

a. Radiacmeter lM-160F/PDR-56 is composed

protect the scintillation crystal assembly from

of a two piece, cast metal box which has a carry-

sharp objects.

ing handle attached to the panel which forms the

top of the box. The panel is used to mount all the

e. C a s e , R a d i a c S e t C Y - 7 3 7 5 / P D R - 5 6 F

operating controls, the instrument meter, cable

(storage case) is made of sheet steel, has a

connectors, and a plate used to hold in two bat-

hinged cover, a carrying handle, and two cover lat-

teries. The rest of the box forms a cover for the in-

ches. The inside of the storage case (Figure 1-3) is

ternal components which are attached to the in-

separated into compartments for storage of the

side of the top panel. The bottom of the box

components of the Radiac Set AN/PDR-56F. Rub-

(Figure 1-2) has a white plastic sheet glued to it.

ber cushioning pads and a gasket (to make the

T h e plastic sheet contains a small piece of

storage case watertight) are cemented to the in-

thorium in its center. The thorium is used as

side of the storage case.

check source for the radiacmeter.

b. Probe, Radiac DT-224B/PDR-56 (main pro-

f. Miscellaneous components such as the

be) is a metal box with a handle extended above it

Headset, Electrical H-43B/U (headset), Harness

s o that it can be fitted together with the

ST-123/PDR-18A (carrying strap), and the exten-

radiacmeter (Figure 1-1). The handle of the main

sion handle are also provided. The extension han-

probe fits inside the handle of the radiacmeter

dle is an assembly of two telescoping aluminum

and they are fastened together with a captive

tubes. The length of the extension handle is ad-

screw in the radiacmeter handle. The bottom

justed by loosening a clamping nut and sliding

plate of the main probe (Figure 1-2) has six slots

the two tubes to the length desired and then

cut into it to form a window area. The window area

retightening the clamp nut.

is covered on the inside with a very thin plastic

and foil sheet (light barrier) which makes the main

1-11.

Tabulated Data

probe light tight but allows for the entry of alpha

radiation. When the main probe is not in use, a

The physical, functional, and performance data is

plastic window cover must be placed over the win-

listed in Table 1-1.

dow area to protect the light barrier. The main

probe and the radiacmeter are connected elec-

Table 1-1. Tabulated Data

trically by a short coiled cable.

25.75 pounds (11.68 kg)

Weight

c. Probe, Radiac DT-228A/PDR-56 (aux probe)

is a metal housing which is designed to fit onto

Size

5 in. x 15 in. x 11.375 in.

the main probe for use in detecting alpha con-

12.7 cm x 38.1 cm x 28.89 cm

tamination when the main probe would be too

bulky. In this case, the main probe is reassembled

-20 degrees C to + 50 degrees C

Temperature Limits:

on it. The aux probe also contains a window area

3.0 vdc (two type BA "D" cells)

Input Power Requirement:

and a light barrier. The light barrier of the aux

probe contains a wire screen to protect it from

(Alpha) 3 MeV (and above, up to

Radiation Measured:

sharp objects. It must also be protected by the

106 counts) (Gamma) 10 keV to

plastic aux probe cover when not in use. The

60 keV - adjustable

plastic cap in the end of the aux probe is a dust

Greater than 11%

Detection Efficiency:

and dirt cover.

d. P r o b e , Radiac DT-590A/PDR-56F (x-ray

20% over upper 80% of 103

Accuracy:

probe) is a metal cylindrical housing which is de-

counts per minute (cpm) range

signed to be attached to the coil cord cable in

1 03, 104, 105, 106 c p m

Variable Meter Ranges:

place of the main probe for use in detecting low

energy gamma radiation (areas contaminated by

Meter and Headphone

Indications:

Plutonium-239 material), In this case, the main

probe is disconnected and removed from the

Main Probe - 17 cm2, Auxiliary

Detection Area:

Pro2be - 11 cm2: X-Ray Probe - 10

radiacmeter and the probe handle is connected to

the x-ray probe. The retractile cable is then con-

nected to the x-ray probe. The extension handle

50 hours with continuous use

Battery Life Expectancy:

may be connected to permit use of the probe in

the standing position or to monitor overhead

Change 2

1-2