I: XYZP-IB Computer Intermediate Frequency Therapy Apparatus Product Performance

1. Operating Conditions:

a) Ambient temperature range: +5℃ to +40℃; b) Ambient humidity range: ≤80%;

c) Atmospheric pressure range: 700hPa to 1060hPa;

d) Rated voltage: a.c.220V, rated frequency: 50Hz.

2. Rated input power: 60VA.

3. Main unit dimensions: length 280mm, width 205mm, height 80mm, tolerance ±20mm.

4. Electrode wire: length 1300mm, tolerance ±50mm.

5. Square electrode plates:

XX-107*72: length 107mm, width 72mm, tolerance ±10%; XX-85*55: length 85mm, width 55mm, tolerance ±10%.

6. Operating frequency: 2kHz to 10kHz, single frequency tolerance ±10%.

7. Modulation frequency: 0 to 150Hz, single frequency tolerance ±10% or ±1Hz, whichever is greater.

8. Intermediate frequency carrier waveform: bidirectional square wave, pulse width 50us to 250us, tolerance ±10%; modulation waveforms include sine wave, square wave, triangular wave, exponential wave, sawtooth wave, spike wave, and continuous wave.

9. Modulation modes: continuous, intermittent, burst, frequency conversion, dense-sparse, and alternating modulation. 10. Intermediate frequency modulation depth: 0%, 25%, 50%, 75%, 100%, tolerance ±5%. 11. Intermediate frequency therapy prescriptions: 35 fixed prescriptions.

12. Intermediate frequency output current: under a 500Ω load, each channel output current not exceeding 100mA, output intensity adjustable in 0 to 99 levels.

13. Output current stability: the output current variation rate under different loads should not exceed 10%.

14. Intermediate frequency output peak voltage: when measured under open circuit conditions, the intermediate frequency output peak voltage must not exceed 500V. 15. Operation: when output is set to maximum, operate open circuit for 10 minutes and then short circuit for 5 minutes, the therapy apparatus should function normally.

16. Electrode plate temperature: 38℃ to 55℃, adjustable in 6 levels, tolerance ±3℃.

17. Electrode plates: should be selected as qualified products with Class I medical device filing certificates.

18. Treatment time: intermediate frequency treatment time is preset in the prescription, with an audio prompt at the end and output cessation, tolerance ±1min.

19. Load impedance: the effective load impedance of this therapy apparatus is 500Ω, and the impact on technical indicators is negligible when the rated load impedance varies within ±10%.

20. Operating mode: continuous operation.

21. Continuous operating time: verified through actual operation, should be no less than 4 hours.