CD V-715 Civil Defense High-Range Radiation Detection Survey Meter, KI4u lab tested and recently calibrated
pounds, die cast aluminum and drawn steel case, watertight, will
one D-sized battery, continuously for 150 hours, longer if on
accuracy on any of its four ranges is within +- 20% of true dose
maintained throughout temperature ranges of -20 F to +125 F, relative
humidities to 100% and altitudes up to 25,000.
500R/hr (X0.1, X1, X10, and X100 scales).
Civil Defense radiation detector meter is taken through the following
preventative maintenance, tests, and evaluations prior to calibration:
completion of the above procedures has the meter then qualified to
attempt calibration to mid-range of all it's scales.
- Confirm integrity of case, meter, and
- Confirm that the mandatory retrofit
had been completed on CD V-715's
- Clean battery contacts and battery
terminals, as required
- Confirm good ground connections on
- Check screws attaching the circuit
board to the case top
- Visual check of circuit board for
metal foil cracks, cold solder joints, or solder bridges
- Clean circuit board with brush and
solution, heat to dry
- Clean high megaohm resistors, as needed
- Clean high megaohm resistors switch,
- Check for dirt contamination of the
high impedence feed-thru insulator on ionization chamber, clean if
- Test ionization chamber for loose
(broken) internal components
- Test ionization chamber for leakage
via Megohm meter, re-coat with clear varnish, if necessary
- Insert battery
- Perform Zero and Circuit Check
operations after two minute warmup at Zero setting
- Check meter needle for free movement
- Commence a power-on 16-hour burn-in to
recondition the electrometer tube
- Repeat the Zero and Circuit Check Test
- Perform stability evaluation of the
meter needle throughout all the ranges. The needle should not deflect
more than three of the smallest increments upscale (0.3 on the meter
face) on the "X100", "X10", and "X1" scales and six increments (0.6 on
the meter face) on the "X0.1" scale
- Remove batteries
- Check instrument case top gasket,
apply light coat of D-5 compound to it, if needed
- Place fresh desiccant packet in case
- Clean outside casing and tag it
passing the KI4U lab calibration, they are then certified fully ready
for reliable, accurate and confident service in the field.
calibration certifications of these Civil Defense survey meters is
accomplished here with the CD V-794 calibrators built specifically for
these type meters. This calibrator utilizes a N.I.S.T. traceable Cs-137
source that tests and calibrates (adjusts) mid-scale for all the
ranges strictly in accordance with industry standards. KI4U, Inc. is
licensed and authorized by the State of Texas to perform these
calibrations at our lab here conforming to the standards as set forth
by the State of Texas, FEMA, ASTM and the NRC.
calibrated instruments are returned with the label below affixed to
them certifying their calibration and stating who calibrated it and
when, along with the serial number and model designation.
of Calibration with
the actual before and after accuracy responses for each of the
different ranges available on the instrument is included.
Unless noted otherwise, items are covered
by a 90 Day limited warranty, against defects and workmanship. Many
products are covered by manufacturer's warranty for one year or more.
If you purchase a product from us and have a problem after the warranty
period, we can usually sell you a replacement item at reduced cost, if
available. Contact us if needed
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