6. Gain: 5, 10, 20 mm/mV, accuracy: ±5 %
7. Gain control: continuous variation is available
8. Gain switch: When the gain changes, there is indication for the recording output.
9. Gain stability: After startup for 1 minute, the gain variation per minute shall be less than
0.33%. The total variation within 1 hour of the constant gain at each level shall be less than ±3%.
10. Time base: 12.5 mm/s, 25 mm/s, 50 mm/s
11. Time base accuracy: within 0.2 s～2.0 s, the allowable error shall be less than ±5%.
12. Channel width: the display width of each channel shall be more than 40mm.
15. Lead weight factor: accuracy within ±5%
16. Calibration voltage: 1 mV, deviation within ±5%
17. Input impedance: ＞40 MΩ
18. Patient-electrode DC current: ＜0.1 μA
19. System noise: ≤15 μVp-p
20. Minimum detection signal: detect the sinusoidal signal deflected to 10 Hz, 20
22. Pacemaker detection channel: standard lead II
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