LB 790 10-channel alpha, beta low background counter
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Brief description:LB790 can simultaneously and independently measure alpha and beta radiating radionuclides. The detection limit of low activity is approximately
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Detailed introduction
germanyBERTHOLD LB 790 10-channel alpha, beta low background counter
Product introduction:
l The LB790 can simultaneously and independently measure alpha and beta radiating radionuclides with a detection limit of approx. Low activity
l Lower detection limit calculation regardless of spillover and calibration uncertainty
l Measurement time (sample= background), 5% error probability, background value of 0.1 alpha per minute and beta 1 CPM
l forThe AM-241 has an efficiency of 34% and the SR-90 has an efficiency of 50%
l 
Registration interface for detector unit connectionsLB 5330, pre-processing the measured values of the count rate for transmission to the PC via the RS-232 port and the high voltage power supply
l The tray and counting tube are surrounded by a shield, 10cm thick, standard lead bricks to reduce radiation to the environment
l Measure simultaneouslyα and β (10x sample drawer planchets diameter 60mm)
l Defender directly combats suppression of cosmic rays (countermeasures counter consistent with the above)
l 10cm lead shielding in all directions for low background performance
l Modular sample testing construction (per module2 detectors)
l Easy to service, maintain and repair
l Detector and sample drawer are one unit
l Preamplifier integrated in detector
l newWindows program AMS (Activity Measurement System Data Acquisition) for PC
Features:
l Measure simultaneously10 samples - Alpha and Beta radioactivity in freely selectable units
l Multiple systems with multiple detectors (up to4 systems) parallel connection
l Measurement time definition: either enter preset time or statistical accuracy
l Automatically stores measured background in user protocol after background subtraction
l Parameters for calibration and quality assurance of nuclide maps and other maps
l Half-life automatic correction independently adjustableAlpha and Beta channels
l Real-time display of detected activity, CPM values, statistical uncertainty, alpha and beta channels in the measurement process, and different categories of measurement ranges
l Statistical screening of outliers in measured values. outlier displaycolourized
l Stored measurement data can be displayed on the monitor and evaluated at any time
l Data analysis: stored in a history file, graphic display of process measurements (background, calibration and performance checks)
l Changes within a specified period of time can be displayed, such as the background value of a trend
l Graphical representation of the measurement cycle time diagram
l Test report compilation (e.g.Excel, Word or Access)
l Sample parameters for data transfer viaExcel table input data files and data output from LIMS or reports
Technical parameters:
Overall dimensions (with lead shielding) | 850×545×320 (length x width x height, unit: mm) |
Weight (lead shielded) | approx. 1200kg |
Sample drawers and electronic equipment | 590 × 520 × 120 (length x width x height mm) |
Weight detection unit | 37.5kg |
Dimensions Dual Detector Module | 262 × 92 × 30 (length x width x height, unit: mm) |
Weight Dual Detector Module | 1.55kg |
Material detection module | cathode copper |
Material Guard Counter | Aluminum |
Electronic power supply | +15/-15 V via LB 5330 |
Total current consumption | 250mA |
Amplifier current consumption | +15 V = 8 mA / -15 V = 6 mA |
connector | 25 POL. SUB-D signal and power |
Operating point of P-10 (typ.) | 1450 V |
detector window | 1.5 micron Hostafan foil (0.21 mg/cm²) |
typical background | < 0.1 CPM (alpha) |
< 1.0 CPM (Beta) | |
working temperature | 0°C to 50°C |
relative humidity | 10% to 80%, no condensation |
Protection level | IP50 (according to DIN IEC 60529) |
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