Eberline E-520 - Page 7

MODEL E-520
Q) Housing: Rotating beta shield 1/16 in.
thick chrome plated brass.
(3) Environmental: Temperature Range -55°C
to 75?C, waterproof.
(4) Sensitivity: Approximately 1200 CPM per
mR/hr for 137Cs.
(5) Cable: Approximately 3 ft. long integrally
attached to probe.
c. Energy Response: See figures 1-2 and 1-3.
4. POWER SUPPLY
a. Batteries: Two D size cells held by internal
captive holders.
b. Voltage Requirement: 1.6 maximum to 1.0
minimum volts per cell.
c. Life: Variable depending on cell type, age,
temperature, etc. Nominal life with new cells at room
temperature for each type is:
Carbon-zinc 300 hours
Alkaline 500 hours
Mercury 700 hours
Nickel-Cadmium 200 hours
(single charge)
5. ENVIRONMENTAL
a. Weather: Splash proof by use of O-ring seals
throughout.
b. Temperature: The instrument is operational
from -40°F to +140°F with a typical temperature co-
efficient of reading less than 0.1% per °F.
The battery type used limits the low temperature
performance because of terminal voltage decrease and
internal impedance increase. For prolonged operation
at low temperatures the following criteria is suggested:
BATTERY TYPE USE TO
Mercury +32°F (0°C)
Carbon-zinc O°F (-18°C)
Alkaline -40°F (-40°C)
Nickel-Cadmium -40°F (-40°C)
6. MECHANICAL
a. Dimensions: Approximately 4 in. wide by 8 in.
long by 7-3/4 in. high including handle.
b. Weight: ^ Approximately 4-3/8 lbs. including
carbon-zinc batteries and HP-177B probe.
ORIGINAL