LUDLUM 70, Системное руководство

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Model 70 System Manual
Ludlum Measurements Inc.
16
May 2021
5.0 SPECIFICATIONS
DETECTORS
Model 70/1 or 70/2 CZT detector:
Volume 0.5 cm
3
(typically 5 x 10 x 10 mm CZT)
Model 70/3 or 70/4 CZT detector: Volume 1.6 cm
3
(typically 16 x 10 x 10 mm CZT)
Neutron detector (included in Models 70/2 and 70/4): 15 mm x 40 mm, Li6-based
CZT Energy Resolution: Usually used
137
Cs, the FWHM at 662 keV: 1.8% to 2.5%
ANALOG TO DIGITAL CONVERTER
Type:
Successive Approximation ADC
Number of channels: 1024
Lower Threshold: Internally adjustable – set at 20 keV
Upper Threshold: Fixed to Channel 1023, all pulses above this level are cosmic and are
accumulated and displayed in Channel 1024
ADC Offset: Internally adjustable
Nuclide ID Over-Range Dose Rate: 0.5 mSv/hr
DOSIMETER
Energy Range:
30 keV to 3.0 MeV set by the spectrometer
Measuring Units: Sv, rem, cps
Gamma Dose Rate: within 30% accuracy per ANSI N42-48, from 0.05 µSv/h to 3 mSv/h (5 µR/hr
to 300 mR/hr)
Output: Memory or PC
CLOCK/CALENDAR
Type:
Built-in 24-hour clock, 4-year calendar (including leap year)
DATA STORAGE
Type:
1 GB flash memory, extended memory 16 MB
Capacity: 100,000 samples, including time/date ( Dose mode) or 500 spectra ( Identify
mode - 1024 channels), including time/date
Stored Data Retrieval: Via USB and/or Wi-Fi to a computer
DATA OUTPUT
Type:
USB port, Wi-Fi