GE MAC 1200, Руководство по обслуживанию

Страница: 115 / 151

Revision D MAC

1200 resting ECG analysis system 9-5

2012250-095
Specifications: Basic Information
Detection of Pacer Pulses
 Pulse length between 0.1 and 2.5 ms

Pacer pulse marker independent of pulse polarity
 Pulse amplitude between ±5 mV and ±700 mV
Heart Rate Indication
Derivation of the heart rate from all ECG signals.

Display range between 30 and 300 bpm.
 Display update with every heart beat, maximum every 2 seconds.
Signal Inputs
Isolated patient signal input, IEC type CF, high-voltage protection for all lead
connections and neutral electrode, interference compensation via neutral electrode,
monitoring for open leads.

Electrode connections for RA, LA, LL, LA, V1 to V6
 Input impedance for differential signals between any two electrode connections
> 10 M

at 10 Hz

Input impedance for common-mode signals referred to neutral electrode > 50
M

up to 60 Hz
 Dynamic range for differential signals between any two electrode connections
for AC voltage ±10 mV, for superimposed DC voltage (polarization voltage)
±600 mV

Dynamic range for common-mode signals referred to neutral electrode ±1 V,
referred to chassis 263 V AC (rms)
 Quiescent input current via any electrode connection for 1 kW termination
referred to neutral electrode < 50 nA

Patient leakage current (rms values) according to IEC, class CF: in normal
condition <10

A, in single-fault condition (e.g. patient in contact with line
voltage) < 20

A
 Non-destructive range for lead-electrode connections and the neutral electrode
connection referred to neutral electrode ±50 V, referred to chassis ±1500 V

Pulse voltage resistance of all lead electrode connections and of the neutral
electrode connection referred to chassis (either polarity, e.g. defibrillation) 5000
V
 Monitoring of each electrode for open leads: RA, LA, LL, RL, V1, V2, V3, V4,
V5, V6 audio signal at printer start