Ludlum Measurements 25009185, Manual

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C
H
A
P
T
E
R
3
S
PECIFICATIONS
Detectors: may be Geiger-Mueller (GM), scintillator, or proportional
HV Range: 400-1500 Vdc
Threshold Range: -4 to -100 mVdc, typically set to -35 mV for GM detectors
Linearity: readings within 10% of true value
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
Display Range:
• 0.0 cps to 99.9 kcps
• 0.00 cpm to 999 kcpm
• 0.00 Bq to 99.9 kBq
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