GE MAC 1200, Operator'S Manual

Page: 181 / 200

Revision C MAC 1200/1200 ST 14-9
2012250-021
Technical Specifications: Recording
ECG Calibration
Automatic recording of a defined voltage step, valid for all channels.
„ Calibration voltage, referred to ECG signal input: l mV
Calibration pulse width on recording depends on paper speed
25 mm/s 5 mm
50 mm/s 10 mm
5 mm/s l mm
Automatic ECG Gain Adjustment
The gain automatically adapts to the incoming signal. The maximum
amplitude of the lead group or of all leads determines the gain setting.
„ Automatic adjustment range 5 ... 40 mm/mV
„ Amplitude range (6 channels) 18 to 31 mm
Baseline
Automatic adjustment of the baseline to the optimal recording range, in
dependence of the signal amplitude.
Anti-drift System (ADS)
Automatic compensation of baseline fluctuations caused by polarization
voltage fluctuations at the lead electrodes (delay in recording: 4.2
seconds).
ECG Storage
In Automatic mode, storage of approximately 40 ECGs.
„ Stored ECGs can be deleted (individually or all in one pass), printed,
transferred and patient data can be edited.
„ In Arrhythmia mode, storage of up to 6 event episodes.
Blocking
Rapid charge reversal of the coupling capacitors in the preamplifiers
after electrode application.