IEC 61266 Ed. 1.0 b:1994

Is applicable to ultrasonic Doppler foetal heartbeat detectors which generate a single ultrasound beam and consist of a hand-held probe which is applied to the maternal abdomen to obtain information on foetal heart activity by means of the Doppler method using continuous wave (c.w) or quasi-continuous wave ultrasound. Establishes - methods of measurement of performances - requirements for the performance and the - reporting of performance