RCA WF-10A Preliminary Operating Instructions

Preliminary Operating Instructions for
WF-lOA, WF-11A, WF-12A, and WF-14A
Geiger Counters
These Geiger counters are designed to detect and count radiation
particles. The number of particles counted depends upon several
factors including, in addition to background level, distance, direc-
tion (bearing), and activity of the radiation source. The instruments
can indicate the presence of radioactivity in three ways; by meter,
headphone, and flashing light.
The WF-lOA, WF-llA, WF-12A, and WF-14A models are
basically similar in operation except for the following differences:
WF-lOA
W. F -llA
WF-12A
WF-14A
Approx. Sensi- Approx. Sensi-
Approx. Sensi- Approx. Sensi-
tivity* in milli- tivity* in milli-
tivity ~' in milli- tivity~' in milli-
Roentgens per hour Roentgens per hour Roentgens per hour Roentgens per hour
per 100 counts per per 100 counts per per 100 counts per per 100 counts per
minute = 0.05. minute
=
0.015. minute = 0.05.
minute
=
0.015.
(1 mR/ HR = (1 mR/HR =
(1 mR/HR = (1 mR/ HR =
2000 CPM) 6600 CPM)
2000 CPM) 6600 CPM)
Maximum counts Maximum counts
Maximum counts
Maximum counts
per minute= per minute=
per minute = per minute=
10000
20 000
10,000 20,000
Meter scale
Meter scale
Meter scale Meter scale
calibrated from calibrated from calibrated from
calibrated from
0 to 100 CPM. 0 to 200 CPM.
0 to 100 CPM.
0 to 200 CPM.
Uses type 1B85
Uses bismuth-type Uses type 1B85 Uses bismuth-type
Geiger-counter 6306 Geiger- Geiger-counter
6306 Geiger-
tube inside case.
counter tube
tube in external counter tube
inside case.
probe.
in external probe.
*Figures shown are indicative of the instrument's sensitivity to a source of
gamma-ray radiation
For additional information on using a Geiger counter in pros-
pecting and surveying, see the booklet "Prospecting with a Counter"
published by the U. S. Atomic Energy Commission. One copy of
this booklet is included with each RCA Geiger counter.
The following items are included with each RCA WF-lOA,
WF-llA, WF-12A, and WF-14A Geiger counter: 1 .carrying strap,
1 radioactive sample, 1 headphone with cord and plug, 1 booklet
"Prospecting for Uranium", and 1 booklet "Operating Instructions".
TMK® Marca Rea;istrada RADIATION DETECTION EQUIPMENT
Copyria;ht, 1!155 RADIO CORPORATION OF AMERICA
Radio Corporation of America HARRISON, N.
J.
Instr. WF-lOA, llA,
12A, 14A ( 2) 6-55
Printed in U.S.A.