B-test device is completely full JJG639-98 medical ultrasound diagnostic ultrasound source verification. One milliwatt ultrasonic power meter U-90 type milliwatt ultrasonic power meter is a highly sensitive and accurate ultrasonic micro-power measuring instruments. This instrument is milliwatt ultrasonic power measurement standard is mainly used for metrology departments, measuring a variety of medical ultrasound diagnostic ultrasound output power. Its advantage is that a simple operation, good stability, small size (26 * 18 * 12CM3), light weight (only 2. 5Kg), particularly convenient test fate. Technical parameters Measuring range: 1 ~ 100mW Resolution: 0.1mW measurement frequency range: 0.5 ~ 10MHZ relative error: ≤ ± 10% supply voltage: 220 ± 22V two, high and low frequency B-device verification testing standards body bounce mimic tissue ultrasound phantom (low frequency) KS107BD ≤4MHz applicable to the frequency of B-instruments, fake ultrasound tissue phantom (high frequency) KS107BG ≥5MHz applicable to the frequency of B-instruments, covering for abdominal, cardiac, small parts and other diagnostic The linear, convex array, phased array, machinery sector scan (including ring array) and other probes. Instrument can detect B-blind, probing depth, 10-170mm deep axial and lateral resolution, vertical and horizontal position of geometric precision, and Investigation of tumors, cysts, stones and other typical lesions of image quality. General Specifications: 1, TM material velocity: 1540 ± 10m / s (23 ± 3 ℃) 2, TM material attenuation coefficient slope: 0.70 ± 0.05dB / cm / MHz (23 ± 3 ℃) 3, nylon wire diameter target : 0.3 ± 0.05mm 4, nylon target line position tolerance: ± 0.1mm imitation ultrasound tissue phantom (low frequency) KS107BD (1) axis lateral resolution of the target group: its lateral branches, respectively, from the acoustic window 30,50,70,120 and 160mm, A1 and A2 are two groups of two adjacent horizontal distance between the center of the target lines were 1,5,4,3,2 mm, A3-A5 three groups in the order of 5,4,3,2 mm. Two adjacent vertical branch target vertical distance between the center lines are 4,3,2,1 mm. (2) blind target groups: the lateral distance between centers of adjacent target lines are 10mm, the distance to the sound of the window were 10,9,8,7,6,5,4,3mm (3) vertical target group: A total of containing the target line 19, the center distance between two adjacent lines are 10mm. (4) the lateral target group: 7 Total containing the target line, the center distance between two adjacent lines are 20mm. Imitation ultrasound tissue phantom (high frequency) KS107BG (1) axis lateral resolution of the target group: each group in the top line of a target located at a depth of 10,30,50,70 mm, each group of target vertical distance between the center line from top to bottom were 3,2,1,0.5mm, horizontal distance are 1 mm. (2) the lateral resolution of the target group: 10,30,50,70 mm depth are located at the center line of each target group horizontal distance were 4,3,2,1 mm. (3) blind target groups: the lateral distance between centers of adjacent target lines are 10 mm, deep window distances of 8,7,6,5,4,3,2 mm. (4) vertical target group: A total of 12 containing the target line, the center distance between two adjacent lines are 10mm (5) Transverse target group: Located at a depth of 40 mm, center distance between two adjacent lines are 10mm. YDI type of medical leakage meter YDI type of medical leakage meter is in accordance with the technical requirements of national verification procedures, the development of measurement instruments have a variety of uses. Can be used to detect various types of diagnostic bounce, ECG machines, and other equipment leakage current, in order to ensure the safety of medical devices for human requirements. 1, the main features: a) the instrument chassis leakage current measurement of patient leakage current measurement (b) (c) measurement of the earth leakage current of 2, measuring range: 0 ~ 200.0μA; 3, Uncertainty: ≤1% ± 1 word; 4, differentiate force: 0.1μA;