GE marquette MAC 1100

Marquette Hellige GmbH MAC 1100/1200 V 1.1 Page 65
227 492 20 D - 0002
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, Vl to V6
• input impedance for differential signals between any two electrode connections > 10 MΩ
at 10 Hz
• input impedance for common-mode signals referred to neutral electrode > 50 MΩ 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 ±l V, referred to
chassis 263 V AC (rms.)
• quiescent input current via any electrode connection for l kΩ termination referred to
neutral electrode < 50 nA
• patient leakage current (rms values) according to IEC, class CF: in normal condition
< 10 µA, in single-fault condition (e.g. patient in contact with line voltage) < 20 µA
• 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, Vl, V2, V3, V4, V5, V6
audio signal at printer start
Data interface
one serial RS232 interface for exchange of data with suitable external devices and software
handshake
RS232 interface (standard V.24 interface):
• input voltage range. ± 15V max.
• output voltage range ±5 V min.
interface protected from electrostatic discharge for ±10 kV max.