The CD V-717 is a portable monitoring instrument which measures
gamma radiation dose rates as high
as 500 roentgens per hour. It is designed to be used by radiological Civil Defense
personnel in determining
radioactive contamination levels that may result from an enemy attack or other
nuclear disasters.
Instrument accuracy on any of its four ranges is within ± 20% of the
true dose rate from Cobalt 60 gamma
radiation. This accuracy is maintained throughout a temperature range of -20°
F to +125° F, relative
humidities to 100% and at altitudes from sea level to 25,000 feet. Use of the
remote cable feature
should give less than ± 5% change in reading. The case consists of three
sections. The top section contains
the meter and almost all of the circuit. The bottom section contains the ion
chamber and provides for
storage of the 25 feet of triaxial cable and the storage spool. The center section
provides for electrically
connecting the circuit board on the top section to the ion chamber from the
bottom section.
This unit can be operated as a hand held unit or in the remote configuration.
The detecting element is an hermetically sealed ionization chamber. This chamber
is located in the lower
front portion of the bottom case section of the instrument to make the instrument
nearly equally
sensitive to radiation from the bottom and front.
The ionization chamber plus the instrument case will together total more
than 1000 mg/cm2 in
effective thickness to make the instrument insensitive to beta rays lower than
2 Mev in energy.
The ionization chamber is hermetically sealed to eliminate changes in sensitivity
due to changes in air
pressure resulting from altitude changes, temperature changes, and moisture
effects.
Meter reads 0 - 5 with switch selectable scales of: x .01 / x .1 / x 10 / x 100
Above information from the Victoreen CD V-717 Model 1 manual.
Battery life is 150 hours of continuous use. This is based
on the carbon/zinc batteries of the early
1960's, newer alkaline batteries should do much better.
Special Note:
The Handbook For Radiological Monitors
only refers to the CD V-717 as a modification of the CD V-715
Government cost in 1969: $30.82
Government Procurement - Fiscal Year 1955 - 1985
100,100
Unit shown ready to use in remote mode. Top and middle sections are together.
