Homorandum this Hqs, dtd 23 Feb 54 (Cont'd)
(a)
Never set instrument dowm in a contaminated aroa.
(b)
Handle instrument carefully.
(c)
Always turn RANGE SWITCH to OFF when not in use,
(a)
Instrument should be stored in a hot locker
(c)
Instrument should not be dismantled except by
(f)
Tho G-M tube in the probe of this instrumont
Mechanism is
delicate. Under certain conditions dangerous potentials may exist
in circuits with power controls in the OFF position duc to charges
retained by capacitors, Operating personnel must at cll times
observe 21] safety regulations.
when not in usc.
personnol of the Signal Maintenance Section.
has a very thin window, Therefore never touch the end of the probe
when the metal shicld has been removed,
ce.
Radiac AN/PDR 10h:
(1)
Operator Checks Before Use:
If the instrument docs
not mect with the following operator checks, it should be taken to the
Signal Liaintenance Section for repair.
(a)
Turn the functicn switch to the BATT COND
(b)
Turn the FUNCTION SWITCH to thc CHG position
position. If pointer stops at the left of the B.TT mark, all baticries
are to be replaced.
for about five seconds.
A low-frequcncy buzz will be heard in the
headsct if the power supply is functioning,
(c)
Turn the FUNCTION SWITCH to the BATT COND position.
4 hissing noisc should be heard in the headset, indicating that corona
is present in the counting charber. Turn the DISCH switch counterclockwise, and then release it. Do this as any times as is necessary to
stop the hissing noisc and repid point counting (once usually is sufficient).
Then operate the DISCh switch onc morc time.
DAA
(a) If the above procedures arc performed while the
radiacmzter is in its carrving casc, the metcr should indicate reccipt
of radioactive emanations from the source located in the case immediately bencath it. If the radiacmetcr is not in its case, the meter
should show no indicaticn. However, plecc radiacncter in its case to
make surc that the meter is operating,
radioactivity by clicking.
emanations.
The hearset also should indicate
in increase in frcqucney of clizks indicates
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