Hemorandum this Hqs, dtd 23 Feb 54 (Cont'd)
10 minutes.
(e)
Allor the radiacmeter
to stand undisturbed for
Then repeat tho procedures of steps (b) and (c).
(f) Remove the radiacueter to location where there is
no radisactive ficld. The average number of clicks heard in the hcac
sect should be less than three par minutc, Teke an average count over 4
period of five minutes, If the count is greater than three por minute,
it may indicate the presence of dirt, lint, or other forcign material in
the counting chamber,
(g)
slow the radiacmetcr to stand for five minutes,
Thon turn tho FUKCTION SVITCH to the HiAD position,
roaly for usc,
The radiacmetcr is
(2) Maintenance and Care of Instruncnt:
(2)
Nover sct instrument down in a contaminated area,
(b)
Handle instrument carefully.
(c)
alveys turn FUNCTION S.ITCH to OFF when not in use.
{d)
Instrument should be stored in a hot locker when
(ce)
Instrument should not bo dismantled except by
(f)
Operating
This raciacmeter
must not be placed on surfaces having sharp projections as the thin foil
window of the counting chember may be pisreead. Precautions should be
taken eat all times to protect this window from damage. Great carc must
be exorciscd never to permit dust, lint and other contaminating substances to enter the counting chamber,
not in usc,
personnel of the Signal iaintonance Section,
personne] must at all times observe all
sofcty regulations, Do not change tubes or make adjustments inside cqui>ment with high voltag: supply cn. Under ccrtsin conditions, dangcrous
potuntials my cxist in circuits with power controls in the off position
due to charges reteined by capacitors.
7.
POCKET DOSTMETERS:
a
General:
Pocket dosimeters arc gencrally similar to a
fountain pen in size and shape.
There are, in general, tuo types as
follovs:s
denser,
BHA
(1) Nonsclf-reading type is actually an electrostatic con‘Such a condenser consists of two concucting surfaces. separnted
by an auxiliary device knew as 2 ninomotcr. 4 definite clectric
charge is placed on the desincter by an auxiliary device know as a mins
teter, Icmization producci within the dosiceter by some cxternnal isrige
ing radiation newtralinzes this clvctrostatic cn-rg.. The loss of charge
is measured by a minometer calibrated tc reac total dosage in roentgens
or r:flliroentgzens,
é
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