A-5
A.8 ECG Specifications
A.8.1 Mindray DS Software Package
Lead naming style AHA, EURO
Lead fault
The lead resistance is no greater than 51 kΩ and it is in parallel
with a 0.047 µF capacitor, it will not cause a lead fault condition.
For 3/5-lead, differential offsets ≤ ±300 mV, it will not cause a
lead fault condition.
Sensitivity selection
1.25 mm/mV (×0.125), 2.5 mm/mV (×0.25), 5 mm/mV (×0.5),
10 mm/mV (×1), 20 mm/mV (×2) and AUTO
Sweep speed 12.5 mm/s, 25 mm/s, 50 mm/s
Bandwidth (-3 dB)
Diagnostic mode:
Monitor mode:
Surgery mode:
0.05 to 100 Hz (812A module)
0.5 to 40 Hz
1 to 20 Hz
Diagnostic mode:
Monitor mode:
Surgery mode:
≥90 dB
≥105 dB
≥105 dB
Common mode rejection
(The notch filter is turned off.)
50/60Hz Notch Filtering The monitor provides software filtering against the 50/60HZ
industrial frequency.
In monitor and surgery modes, the 50/60HZ filter will be turned
on automatically.
In diagnostic mode, the 50/60HZ filter will be turned off.
Input offset current ≤0.1μA (except currents to drive leads)
Differential input impedance ≥ 5MΩ
Input signal range ±8mV (peak-to-peak value)
Accuracy of input signal
reproduction
Methods A and D were used to establish overall system error and
frequency response according to EC11.
Auxiliary current (Leads off
detection)
Active electrode: < 0.1 μA
Reference electrode: < 1 μA
Patient leakage current < 10uA
Recovery time after
defibrillation
< 5s
Calibration signal
1 mV (peak-to-peak value), precision: ±5%
ESU protection Incision mode: 300W
Congelation mode: 100W
Restore time: ≤10s
The monitor complies with the requirements of ANSI/AAMI
EC13 Section 4.2.9.14.
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