Ludlum Model 3030 Alpha Beta Sample Counter
$2,980.00
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$2,980.00
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Features
- Fully Integrated Alpha-Beta Sample Counter
- Simultaneous Alpha and Beta Counting
- Shielded 5.1 cm (2 in.) Diameter Sample Tray
- Independent Readouts
- CPM & DPM Modes
- Background Subtraction
- Alpha/Beta Alarms
- QC Check
- 8 Hour Battery Operation
- Real Time Clock
- RS-232 Interface
- Includes PC Software
The Model 3030 Alpha-Beta Sample Counter incorporates an internally housed ZnS(Ag) plastic scintillator detector with shielded 5.1 cm (2 in.) diameter stainless steel sample tray into the Ludlum Model 3030 Scaler. This combined system supplies independent backlit LCD readouts to support discriminated alpha and beta sample counting. Key features include background subtraction, crosstalk correction, separate alpha/beta alarms, cpm/dpm operating modes, and a pre-scripted QC function with automatic reminder timer.
The instrument supports both 110 and 220 Vac operation, and includes a trickle charged gel-cell battery for portable offsite use for up to eight hours. A wide-range high voltage power supply supports virtually any detector. Status indicators located along the front panel inform the operator when a QC check is required, if the detector is non-functional, if it is operating in dpm or cpm mode, and if either an alpha or beta alarm setpoint has been exceeded.
The count time is selected via a front-panel rotary switch that enables count times ranging from 0.1 to 60 minutes, or some other prescribed value as set up via a link to a PC. Other controls include a start count button, audio volume rotary adjustment, and instrument on/off switch. An RS-232 output from the rear panel supports connection to either a printer or PC. Included in the price is PC-control software, which is a Windows application that supports setup of the system, as well as collecting and logging all count results from the 3030.
| Indicated Use | Simultaneous alpha-beta sample counting | |
|---|---|---|
| Detector | ZnS(Ag) adhered to plastic scintillation material | |
| Tube | 5.1 cm (2 in.) diameter magnetically shielded photomultiplier | |
| Window | 0.4 mg/cm2 aluminized mylar | |
| Active and Open Area | 20.3 cm2 | |
| Sample Holder | Brass housing with nickel plated brass sample tray capable of holding up to a 5.1 cm (2 in.) diameter sample Shielding Thickness: 19 mm (0.750 in.) |
|
| Alpha Efficiency (4π) | 239Pu | 37% |
| 230Th | 32% | |
| 238U | 39% | |
| Beta Efficiency (4π) | 14C | 8% |
| 99Tc | 27% | |
| 137Cs | 29% | |
| 90Sr/90Y | 26% | |
| Cross Talk | Alpha to Beta | ≤ 10% |
| Beta to Alpha | ≤ 1% | |
| Background | Alpha | 3 cpm or less |
| Beta-Gamma | typically 50 cpm or less (10 μR/hr field) | |
| Audio | Built in unimorph-type speaker with volume control to provide a dual tone click-per-event audio | |
| Status Indicators |
|
|
| Scalers | Two each six-digit LCD displays with backlights providing a range of 0 to 999999 counts | |
| Scaler Linearity | Reading within 2% of true value | |
| Count Timer Settings | 0.1, 0.5, 1, 2, 5, 10, and 60 minutes. PC position facilitates other user-defined values set by software program. | |
| High Voltage | Adjustable from 200 to 2500 Vdc | |
| Thresholds | Alpha | -120 mV |
| Beta | -4 mV | |
| Beta Window | 50 mV | |
| Data Output | 9-pin RS-232 port for connection to PC for data download and adjustment of setup parameters. A one meter RS-232 to USB adapter cable is included. PC interface software is available for download here. | |
| Power | 250 watts at 95 to 250 Vac, 50–60 Hz single phase Internal 12 Vdc, 1.2A/hr, trickle charged battery provides power up to eight hours. |
|
| Construction | Aluminum housing with gray powder coat paint and sub-surface printed front panel | |
| Temperature Range | -20 to 50 °C (-4 to 122 °F) | |
| Size (H x W x L) | 29.2 x 19.1 x 26.7 cm (11.5 x 7.5 x 10.5 in.) | |
| Weight | Approximately 13.2 kg (29 lb) | |
