de
1.
O-4 mr/hr
2.
0-40 mr/hr
3.
0-400 mr/nr
4.
0-4000 mr/hr
5.
0-40,000 mr/hr
i Bs
The microphonios to be held to a minimum.
On any one of three
one-inch drops produced by suddenly pulling a one-inch board
from under one end of the instrument the meter reading would
not go over one-half full scale on any range of sensitivity.
e.
The instrument was to be calibrated by gamma rays from radium
and to conform to the sensitivities specified in (c) above within
an average of 10% of full scale at any point on the scale.
f.
The circuit to be so designed that after switching from one
range to another not more than 10 seconds would be required to
reach 90% of the final reading.
ge
The instrument to be sensitive to gamma radiation and the wall |
-of the chamber to be composed of a material with the atomic
number less than ten such that the instrument would be wave
length independent from all X and gamm radiation with energies
above 5 Kvp, and beta particles with energies less than 1.0 NEV
to be excluded.
he
The circuit time constant to be such that 90% of the final reading of the instrument would be reached within 10 seconds or less.
4.
The instrument to operate under the above requirements over
ranges of temperatures from minus 5° C to 70° C and with the
relative humidity of 95% for a period of twenty-four hours.
,Seotion IX
18
ee,