C
H
A
P
T
E
R
3
S
PECIFICATIONS
Detector:
alpha beta scintillator or gas proportional
HV Range:
400-2200 Vdc
Beta Threshold Range:
-2 to -99.9 mVdc, measured by Ludlum Model 500 Series Pulser.
Beta Window Range:
-2 to -350 mVdc, measured by Ludlum Model 500 Series Pulser.
Alpha Threshold Range:
-2 to -500 mVdc, measured by Ludlum Model 500 Series Pulser.
Alpha Window Range:
-2 to -500 mVdc or wide open, measured by Ludlum Model 500
Series Pulser.
Resolving Time:
approximately 5
µ
sec as defined by IEC 60325
Response Time:
user-selectable from 1 to 60 seconds, auto-response rate of fast or slow
Alarms:
two adjustable count rate, exposure/dose, and count alarm setpoints adjustable
over the display range
Overload Protection:
high count rate saturation protection designed to prevent the false
display of lower count rates
Zero Protection:
after a user-settable number of seconds, typically 60 seconds, of no pulses
from the detector, the alarm audio will be triggered
Dead Time Correction:
employs first and second order corrections for extended
performance
Overrange:
if the reading should exceed the predefined detector range, the instrument will
flash a maximum reading and trigger an audio warning
LCD Display:
3-digit LCD with large 20 mm (0.8 in.) digits, (k)cps, (k)cpm, (k)Bq, (k)dpm,
(
µ
)(m)R(/h), (
µ
)(m)Sv(/h), low-battery indicator, MAX, ALARM, AUDIO,
α
, and
β
Display Range:
• 0.0 cps to 99.9 kcps
25
