GE MAC 1200

7-6 MAC 1200 resting ECG analysis system Revision D
2012250-095
Service and Maintenance: Technical Inspections/Preventative Maintenance
Analysis of the ECG Signals and HR Value
Carry out the following settings on the ECG simulator.
 Amplitude: 1 mV
 Heart rate (RATE): 60 bpm
Connect the electrode leads as indicated below.
R, red (or RA) -----> RA
L, yellow (or LA) -----> LA
F, green (or LL) -----> LL
N, black (or RL) -----> RL
C1, white/red (or V1) -----> V1
:
:
C6, white/violet (or V6) -----> V6
Switch in 6 lead operating mode and start recording by pressing the Start key.
By pressing the lead scrolling key, check whether all leads are being recorded.
The ECG traces must be noise-free.
Record one page in the manual (6-lead) operating mode. The following annotations
must be present.
 Heart rate (top right)
 Lower status line
 Date and time
 Recording speed
 Sensitivity
 Active filter, e.g., 50/60 Hz, 40/20 Hz, ADS
 Frequency range of the recording
The heart rate of 60 bpm ±2 bpm appears on the display and is printed out on the
recording.
Activate the square-wave function on the ECG simulator at 1 mV.Using the lead
scrolling key select lead II. The square-wave pulse trace must correspond in
amplitude with the displayed 1 mV reference pulse (applicable to named simulator
only).
Switch back to ECG signal on the ECG simulator. Start the recording in manual (6-
lead) mode. Increase the heart rate to 200 bpm on the ECG simulator. The acoustic
warning signal must sound for about 1s. Reduce the heart rate back to 60 bpm, the
warning signal no longer sounds.
Pacemaker Identification Test
Make the following settings on the multifunction simulator.
 Pace setting
 Pace amplitude 6 mV
 Pace duration 0.2 ms
Adjust manual (6-lead) mode on MAC 1200 device to be tested and select lead
groups I, II and III.