Nihon Kohden Corporation ZM-520PA Benutzerhandbuch

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Operator’s Manual  ZM-520PA/521PA/530PA/531PA

Common mode rejection ratio: 

95 dB or more

 

IEC 60601-2-27: 2005 50.102.10 complied

Pacing pulse detection: 

amplitude ±2 to 700 mV, duration 0.1 to 2 ms

 

IEC 60601-2-27: 2005 complied

 

Based upon pacemaker pulse rejection capability

Defibrillation-proof: 

ECG input protected against 400 Ws/DC 5 kV

 

IEC 60601-2-27 17.101 complied

ECG recovery time after defibrillation:  within 10 s
Electrode condition: 

Displays CHECK ELECTRODES message

Tall T-wave rejection capability: 

Complies with the heights of T-waves from 0 to 1.2 mV

 

IEC 60601-2-27: 2005 50.102.17 complied

Heart rate averaging:  

Calculated by using the most recent 8 beats.

Heart rate meter accuracy and response to irregular rhythm:
 

Ventricular bigeminy (Test waveform name: aami3a*): 

 80 

bpm

 

Slow alternating ventricular bigeminy (Test waveform 
name: aami3b*): 60 bpm

 

Rapid alternating ventricular bigeminy (Test waveform 
name: aami3c*): 108 bpm

 

Bidirectional systoles (Test waveform name: aami3d*): 

 88 

bpm

 

*  The test waveforms can be download at http://www. 
 physionet.org

Response time of heart rate meter to change in heart rate:
 

HR change from 80 to 120 bpm: 4 to 8 seconds

 

HR change from 80 to 40 bpm: 11 to 15 seconds

Pacemaker pulse rejection capability, without overshoot:
 

Complies with the amplitudes of pacemaker pulses ±2 to 
±700 mV and widths 0.1 to 2 ms (specified in IEC 60601-2-
27: 2005 50.102.13)

Pacemaker pulse rejection capability, with overshoot:
 

Overshoot amplitudes and time constants of ±0.12 mV/100 
ms to ±2 mV/4 ms (As defined by method B of IEC 60601-
2-27: 2005 50.102.13, this corresponds to the pacemaker 
pulses amplitudes and widths of ±4 mV/2 ms to amplitudes 
±80 mV/0.1 ms.)

ECG display and heart rate count
Frequency characteristic: 

filter on: 1 to 18 Hz, filter off: 0.05 to 60 Hz

Heart rate detection method: 

Average

QRS detection: 

70 to 120 ms: amplitude ≥ 0.5 mV, rate 30 to 200 beats/min

 

40 to 120 ms: amplitude ≥ 0.5 mV, rate 30 to 250 beats/min

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