General Purpose Scaler- Ratemeter
General Purpose Scaler-Ratemeter
Features
- Digital Ratemeter with Built-In Scaler
- Dual Analog Meter & Digital LCD Presentation
- Rich Array of Discrete Front Panel Controls
- Single Channel Analysis
- Optional RS-232 Data Output
- Wide Range HV
- Overload Protection
The Model 2221 is a general purpose ratemeter and scaler with an analog display for optimally viewing the count rate and rate of change through all possible four decades of display. It is accompanied by a digital LCD, which can present either the ratemeter data or the scaler counts.
Control functions available include: decade range selection, scaler count time, power on/off, response setting, LCD analog/digital switch, PHA window switch, lamp, audio divide by, audio volume, count zeroing, and scaler start/halt.
The wide range high voltage supply supports a variety of detectors with additional threshold and window settings that facilitate switching between gross counts and the energy band of interest. The instrument housing is cast aluminum with a separate battery compartment and accompanying metal handle. This design delivers industrial robustness, quality, capability, and versatility.
| Indicated Use | Field Analysis |
|---|---|
| Compatible Detectors | GM, Proportional, Scintillation |
| Ratemeter | Provides a four-decade analog display that is operational any time the instrument is turned on. The ratemeter can also be presented on the accompanying LCD as a digital value when the LCD is switched to the "Dig. Rate" position. |
| Scaler | Range from 0 to 999999 counts |
| Meter Dial | 0 - 500 cpm, 50 - 500k cpm logarithmic scale (Meter Faces tab lists other available meter faces) |
| Digital Display | 6-digit LCD display with 1.3 cm (0.5 in.) high digits |
| LCD Backlight | Activated by LAMP switch |
| Concurrent Use | Scaler or digital ratemeter is active when not selected, allowing for concurrent use |
| Timer | Switch selectable divisions of 0.1, 0.5, 1, 2, 5, 10 minutes or CONT (continuous) for manual timing |
| Controls |
|
| High Voltage | Adjustable from 400 to 2400 V (can be checked on display) |
| Threshold | Adjustable from 100 to 1000 (can be checked on display) |
| Window | Adjustable from 0 to 1000 above threshold setting (can be turned on or off) |
| Gain | Adjustable from 1.5 to 100 mV at a threshold setting of 100 |
| Overload | Senses detector saturation, indicated by “– – – –” on LCD display and meter going to full scale (adjustable depending on detector selected) |
| Audio | Built-in unimorph speaker with volume control |
| Audio Jack | For optional headset |
| Power | 4 each “D” cell batteries |
| Battery Life | Typically 250 hours with alkaline batteries (battery condition can be checked on digital display) |
| Connector | Series "C" type |
| Size (H x W x L) | 22.9 x 10.9 x 25.4 cm (9 x 4.3 x 10 in.) including handle |
| Weight | 2.5 kg (5.5 lb) including batteries |
| SKU | 144133 |
|---|---|
| MFR Number | 48-2065 |
| Manufacturer | LUDLUM MEASUREMENTS INC. |
| UOM | EA |
