Device Details
Specifications
Weight
Sample changer: 180
pounds (including shielding)
Computer: 35 pounds
Printer: 10 pounds
Dimensions
All units are
bench-top mounting.
Sample changer: 21 in.
wide, 26 in. deep, 24 in. high
Computer (with keyboard and monitor): 13 in. wide, 21 in. deep, 16 in. high
Printer: 16 in. wide, 14 in. deep, 6 1/2 in. high
Sample Changer
Sample handling:
25-sample rotary changer. Change time is 10 sec per sample.
Detector and shield: 2 in. x 2 in. sodium-iodide (Tl) with 0.8 in. x 1.4 in.
deep well; shielded 4-pi by ~2 in. low background lead. Energy range: 20 to
~2000 keV.
Maximum background (laboratory): <100 cpm
Requirements
Clearances
Sample changer: 3 in.
at sides, 5 in. at rear, 3 in. above. There must be no obstruction underneath.
Computer: 5 in. at sides, 4 in. at rear, 5 in. above, 6 in. at front (in
addition to keyboard). There must be no obstruction of airflow at the rear.
Printer: 4 in. at sides, 4 in. at rear, 12 in. above (paper access); there must
be free air flow at sides and rear and free paper flow from below or rear.
Mounting
The sample changer
requires a sturdy, laboratory-type bench capable of supporting 180 pounds on a
four point mounting; it must be level. The computer and printer require only
office-type mounting facilities.
Shock/Vibration
Observe normal
laboratory conditions.
Power
All units require 115
volts +/-10%, 60 Hz, single phase
Sample changer: 40 watts
Computer: 575 watts
Printer: 15 watts
EMI
All units are well
shielded against emission of EMI.
Heat Load
Less than 300 watts
are contributed to the atmosphere.
Laboratory Environment for
Gamma Counting
Background
Radiation Limit
External sources of
radiation can significantly affect the proper operation of the instrument and
the test results. They should be minimized to the greatest possible extent.
Temperature
Limits
This is a precise
laboratory device; it is TEMPERATURE SENSITIVE. Temperatures must be maintained
within +/- 5 degrees of normal; rate of change must be < 1 degree/hour.
Operating temperature range is 65 to 85 degrees F.
Storage temperatures range is 45 to 100 degrees F. (NO RAPID TEMPERATURE
CHANGES.)
