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 Wide Range Allows Both External Beam & Brachytherapy Measurements.
Excellent for absolute dosimetry measurements with standard farmer and parallel plate ion chambers. Extremely reliable and precise for high dose rate and most low dose rate brachytherapy calibrations. Five decade Amp range with 10pA resolution; extremely extensive Coulomb range 10pC to 999,999nC.
Easy to Use
A few pressure sensitive buttons control all operations, providing quick and simple operation. User activated automatic zeroing - press a button and you are ready to measure. Rechargeable battery operation with percent of battery charge displayed on screen. Compact, stable, lightweight and easily transported.
Powerful Digital Microprocessor Operation
Large, easy to read, 2 row by 20 column LCD display; visible from a distance in low light. Displays Amps, Coulombs, collection time, and also bias voltage and battery charge level. Digital operation provides 0.1% repeatability, and exceptionally low leakage of < 1fA. Digital filter nearly eliminates the effects of noise, resulting in an extremely stable reading. Auto shut-off after 3 hours, if no buttons are pushed. Unidirectional RS-232 port and RJ-45 to DB-9 adapter allow direct computer interface for data capture and storage.
Unique Timing Capabilities
The unique timing feature is ideally suited for brachytherapy calibration measurements. The CDX 2000B can capture charge for a selected amount of time during an exposure, thereby eliminating end effects or other variable portions of an exposure.
This application is very useful during the measurement of high and low dose rate brachytherapy sources allowing you to measure charge only during the time the source is in place and the rate is constant.
Specifications
Four Modes: Rate, Charge, Timing and Combined Rate and charge.
Rate Mode: 0.01 nA - 200.00 nA
Charge Mode : 0.01 nC - 999,999 nC
Timing Mode : Selectable time periods for charge collection
Timing Range: 0 - 600 sec
Timing Increments: 15 sec
Timing Resolutions: 1 sec
Other Mode: “Free Running”
Combined: The accumulated charge and the current readings are displayed simultaneously.
Repeatability: Short term, ±0.1% ±1 count
Long term, ±0.2 (maximum change over two years)
Signal Setting Time (typ) 1 sec
Linearity: ±0.06% typical
CE: 93/42/EEC
Zero Drift: <1 fA
Display: LCD, 2 x 20 with 5/16” high letters for easy viewing.
Input: BNC-F two lug, triaxial connector
Bias Voltage: Nominal ± 300 volt bias.
Five user setting: -300, -150, 0, 150, 300 (VDC)
Accuracy: ±0.3 volt
Power: UL listed wall-mounted power supply/battery charger, 110 or 220 VAC input, 9VDC @300 mA. Internal battery: 10 hrs/charge
Zeroing: Automatic zero function, user activated.
Output: Isolated RS-232, uni-directional, 19,200 baud rate, 8 data bits, nor parity, 1 stop bit
Dimensions: 8.24” W x 9” L x 2.75” H
Weight: 3 lbs
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