User's Manual

SE-301 Series Electrocardiograph User Manual Operation Preparations
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Limb Electrode
The identifiers and color codes of electrodes used comply with IEC/EN requirements. In order
to avoid incorrect connections, the electrode identifiers and color codes are specified in Table
4-1. Moreover the equivalent codes according to American requirements are given in Table 4-1
too.
Table 3–1 Electrodes and Their identifiers and color codes
European American
Electrodes Identifier Color code Identifier Color code
Right arm R Red RA White
Left arm L Yellow LA Black
Right leg N or RF Black RL Green
Left leg F Green LL Red
Chest 1 C1 White/red V1 Brown/red
Chest 2 C2 White/yellow V2 Brown/yellow
Chest 3 C3 White/green V3 Brown/green
Chest 4 C4 White/brown V4 Brown/blue
Chest 5 C5 White/black V5 Brown/orange
Chest 6 C6 White/violet V6 Brown/violet
As the following figure shows, the positions of chest electrodes on the body surface are
C1: Fourth intercostal space at the right border of the sternum
C2: Fourth intercostal space at the left border of the sternum
C3: Fifth rib between C2 and C4
C4: Fifth intercostal space on the left midclavicular line
C5: Left anterior axillary line at the horizontal level of C4
C6: Left midaxillary line at the horizontal level of C4
Reed
Electrode
Clamp