Section II. EQUIPMENT DESCRIPTION AND DATA

TM 11-6665-230-12

1-8. NOMENCLATURE CROSS REFERENCE LIST

COMMON NAME

OFFICIAL NOMENCLATURE

Radiac Set AN/PDR-27R

Radiac Set

Radiacmeter lM-203/PDR-27R

Radiacmeter

Harness, ST-136/PDR-27R

Harness

Headset

Headset, Electrical H-43 B/U

Case

Case, Carrying CY-4995/PDR-27R

Test Sample

Radioactive Test Sample MX-7338/PDR-27R

Battery

Battery, Dry BA-30

Radiac Detector DT-196/PDR-27R

Probe

EQUIPMENT DESCRIPTION AND DATA

Section II.

1-9. EQUIPMENT PURPOSE, CAPABILITIES AND FEATURES

a. Purpose. The AN/PDR-27R is designed to detect beta radiation and measure and detect gamma nuclear

radiation.

and

features

Capabilities

(1) Portable.

(2) Watertight.

(3) Lightweight.

(4) Battery operated.

(5) Rugged.

(6) Detects and measures gamma radiation alone or detects beta nuclear radiation.

1-10. LOCATION AND DESCRIPTION OF MAJOR COMPONENTS In figure 1-2 is a diagram of the in-

dividual components of Radiac Set AN/PDR-27R. A description of each component follows:

a. Radiacmeter lM-203/PDR-27R (fig. 1-2) (1). The radiacmeter includes a housing made of two

aluminum castings with a gasketed seam. The top casting or panel supports all of the electronic circuitry

and includes a separate sealed battery compartment. The bottom casting acts as a cover which encloses

the electronic circuitry and the battery compartment. The unit is powered by six BA-30 batteries.

1. Mounted on the panel is an indicating meter, a function switch, a meter illumination switch

and a headset jack.

2. The indicating meter is mounted behind a sealed glass window for waterproofing. It has five

removable scales which are mechanically coupled to the range switch so that the scale corresponding to

the switch position is presented.

3. The carrying handle provides space for storing the detector cable when the detector is

placed into the mounting well.

1-2