GE MAC 1200 - 4 Repair Instructions

GE Medical Systems MAC 1200 V 1.2 Page 67
Information Technologies 227 492 21 Rev F
© input impedance for differential signals between any two electrode connections > 10 MQ at
10 Hz
e input impedance for common-mode signals referred to neutral electrode > 50 MQ 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
e dynamic range for common-mode signals referred to neutral electrode +I V, referred to chassis
263 V AC (rms.)
® quiescent input current via any electrode connection for | kQ termination referred to neutral
electrode < 50 nA
e patient leakage current (rms values) according to IEC, class CF: in normal condition < 10 pA, in
single-fault condition (e.g. patient in contact with line voltage) < 20 LA
e non-destructive range for lead-elecirode connections and the neutral electrode connection
referred to neutral electrode +50 V, referred to chassis +1500 V
e 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, VI, 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.
e output voltage range +5 V min.
interface protected from electrostatic discharge for +10 kV max.