c. Control panel.
Includes digital display, alarm lights, and switches used to operate
and test the RADIAC Set.
d. Display.
Shows dose per hour or accumulated dose, low batteries, alarm set
points, and test and fault indicators.
4.
Principles of Operation.
Gamma rays and beta particles from a radioactive source travel in all
directions. Two detectors in the probe produce an electrical signal
on contact with gamma rays and beta particles. The RADIACmeter
converts the signals from the probe into dose rates and accumulated
dose and activates the alarm when present alarm levels are exceeded.
The display shows dose rate and accumulated dose values, alarm set
levels, battery conditions, and test and fault indicators. Control
panel switches and indicators permit the operator to set alarm levels
for audible or visual display, select display readings, and perform
5.
Total Dose Range.
The AN/VDR-2 detects, measures, and displays a level of gamma
radiation dose rate from 0.01 Gy per hour to 100 per hour. It also
detects and displays a level of beta particle dose rate from 0.01 Gy
per hour to 5 cGy per hour. Finally, it measures, stores, and
displays accumulated dose from 0.01 Gy to 9.99 Gy.
6.
Operate the AN/VDR-2 RADIAC Set.
In order to be able to use the AN/VDR-2 RADIAC Set, you must know what
it is and that it is used for. It has the capability of alerting
personnel to contamination of gamma rays or beta particles by a visual
or audible alarm. It provides a readout, with decimal point placement
for dose rate and accumulated dose measurement.
a. Assembly and Preparation for Use.
(1)
When installing and replacing the battery (Figure 5-12):
(a) Make sure PWR switch is OFF (down position).
(b) Loosen, but do not remove captive screws.
IS0345
5-16
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