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Radiological Survey Meter or Geiger Counter OCD Item No. CD V-717, Model No. 1 Includes: One Survey Meter, One Shoulder Strap The CD V-717 is a modification of the CD V-715 ionization chamber survey meter. Its operating characteristics and specifications are very similar to those of the CD V-715, except that the 717 has a removable hermetically sealed chamber that can be attached to 25 feet of cable. This gives the 717 the ability to make remote readings, e.g., with the chamber outside the monitoring station where it was used. The bottom half of the case contains the ion chamber and a removable spool with 25’ of cable. The 717, like the 715, was transistorized and had two controls: a zero adjust knob and a range switch. The purpose of this instrument is explained in the following quote from CPG 1-30 (FEMA 1981): "This instrument was designed for use by radiological monitors in WER stations during the early period following a nuclear attack. The purpose of the instrument is to decrease the radiation exposure to monitors by making it unnecessary for the monitor to leave his shelter in order to obtain an outside measurement." This is a CD V-750 Model 5b dosimeter charger manufactured by Industrial Electronic Hardware Corp. The dosimeter presses onto the charging contact on the upper left of the charger and the hairline on the dosimeter's scale is zeroed by turning the large knob on the upper right. The charging contact has a clear plastic bushing that the contact passes through. There is a light bulb inside the charger below the contact which comes on when the contact is pressed down and allows the person charging the dosimeter to see the scale while charging. You can see the markings showing which way to turn the knob, "up scale" or "down scale". These chargers use one D-cell battery for power. (We do not proofread any ads submitted by members) |
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