Detection Of Pacer Pulses; Heart Rate Indication; Signal Inputs - GE MAC 1200 Operator's Manual

Detection of Pacer Pulses

Heart Rate Indication

Signal Inputs

Revision C
Technical Specifications: Recording
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Pulse length between 0.1 and 2.5 ms
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Pacer pulse marker independent of pulse polarity
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Pulse amplitude between ± 5 mV and ± 700 mV
Derivation of the heart rate from all ECG signals.
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Display range 30 to 300 bpm
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Display update with every heart beat, maximum every 2 seconds
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.
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Electrode connections for R, L, F, N, Cl ... C6, Nax, Nst, Nap (= C4).
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Input impedance for differential signals between any two electrode
connections > 10 MW at 10 Hz.
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Input impedance for common-mode signals referred to neutral
electrode > 50 MW up to 60 Hz.
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Dynamic range for differential signals between any two electrode
connections for AC voltage ±10 mV, for superimposed DC voltage
(polarization voltage) ±600 mV.
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Dynamic range for common-mode signals referred to neutral
electrode ±l V, referred to chassis 263 V AC (rms).
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Quiescent input current via any electrode connection for l kW
termination referred to neutral electrode < 50 nA.
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Patient leakage current (rms values) according to IEC, class CF: in
normal condition < 10 mA, in single-fault condition (e.g. patient in
contact with line voltage) < 20 mA.
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Non-destructive range for lead-electrode connections and the neutral
electrode connection referred to neutral electrode ±50 V, referred to
chassis ±1500 V.
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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: R, L, F, N, Cl, C2, C3,
C4, C5, C6, Nap, Nax, Nst. Audible lead fail signal at program start.
MAC 1200/1200 ST
2012250-021
14-5