Multi-frequency CW Ultrasound Check Source
The Multi-frequency CW Check Source is designed to produce a known acoustic output power at two discrete frequencies in the diagnostic and lower-end therapeutic levels. Traceable measurement of the acoustic power output of ultrasonic diagnostic and therapeutic equipment is essential for compliance with regulatory, safety and quality standards. To meet this need, the calibration of measuring equipment such as radiation force balances and power meters should be checked regularly against reference standards. The Multi-frequency CW Check Source has been developed as a cost-effective route to providing traceability to National Measurement Standards.
Key Features
- Two discrete frequency outputs
- Simple to use
- Robust and portable
- Very stable
- Output power selectable: 10mW, 100mW or 1W
- Traceable to National Measurement Standards
- A choice of certificated calibration options
Technical Specification
| Excitation | Two continuous-wave outputs at specified frequencies |
| Transducers | Two 19mm diameter, unfocussed at specified frequencies |
| Nominal power output | 10mW, 100mW and 1W - front-panel selected, intermediate "off" |
| Stability | Power output stable to better than+/- 2.5% during 1000 hours of use |
| Calibration accuracy | +/- 7% as standard (see Option 1 or Option 2 below) |
| Electrical input | Supply voltage 80V to 250V, 50Hz to 60Hz, universal |
| Environmental | Recommended normal operating temperature range 19°C to 25°C. Conforms to BS electrical safety standards and EMC regulations - CE Marking |
Precision Acoustics reserves the right to change the specification without notice
Calibration Options
The Multi-frequency Check Source is supplied with calibration of both transducers. These calibrations can be against either the NPL Primary or Secondary Acoustic Standard:
| Option 1 | Calibration of power output against a secondary standard radiation force balance - accuracy = +/-7% (95% confidence) |
| Option 2 | Calibration of power output against the NPL primary standard radiation force balance - accuracy = +/-4% (95% confidence) |
Full characterisation of the transmitted ultrasound field at 100mW in accordance with IEC 61157 (1993) is also available, in addition to Options 1 or 2, upon request.
Re-calibration against national measurement standards is recommended at least at yearly intervals. NPL provides the above calibration Options 1 and 2 for certificated re-calibration.
Contact Precision Acoustics Ltd to discuss your specific requirements.
