Eberline E-520 - SECTION II OPERATION; A. DESCRIPTION OF CONTROLS AND CONNECTORS; B. PREPARATION FOR USE; C. USING THE INSTRUMENT

MODEL
E-520
SECTION II
OPERATION
A. DESCRIPTION OF CONTROLS AND CONNECTORS
1. EXTERNAL (See figure 2-1)
a. Switch: Seven position rotary switch that turns
instrument OFF, checks BATTery condition and selects
scale multipliers of X.01, X0.1, X1.0, X10 and X100.
This number must be multiplied by the meter indication to
obtain the proper reading.
b. RESPONSE: Controls response time of meter
to the most desirable compromise between speed and
fluctuation for the particular usage.
c. RESET: Discharges integrating capacitor, bring-
ing meter reading to zero rapidly.
d. PHONE: Pulse output for use with earphone,
speaker or external scaler. Mating connector is BNC
series coaxial.
e. DETECTOR: Connection to hand probe. BNC
series coaxial.
2. INTERNAL (See figure 2-1)
a.
Calibration
Controls:
One
control
for
each
range
which
individually
calibrates
that
range
to
agree
with
the
input
pulse
rate.
B.
PREPARATION
FOR
USE
1.
INSPECTIONS
The instrument should be checked for physical damage.
ORIGINAL
2. CONNECTIONS
Connect the probe cable to the probe connector.
C. USING THE INSTRUMENT
1. STARTING
Turn the switch to the BATTery check position. The
meter should indicate within the BATT OK area.
2. OPERATION CHECK
Place a check source in a repeatable position adjacent to
the detector and move the switch to a range that gives an
upscale reading. Note that the reading is sensitive to the
position of the source. The reading may be recorded for
future reference.
Push the RESET button and the reading should drop to
zero rapidly, then climb back to source reading when the
RESET is released. The RESPONSE may be adjusted to
get the most desirable compromise between speed of
response and meter fluctuation.
3. INTERPRETATION OF INDICATIONS
The meter reading must be multiplied by the scale
factor to obtain the proper number. The fluctuation of
the meter is normal and is caused by the random nature of
radioactive decay.