SE-1200 Series Electrocardiograph User Manual Operation Preparations
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Table 3-1 Electrode Connectors and Their Identifiers and Color Codes
IEC
AHA
Electrode Connectors
Identifier
Color Code
Identifier
Color Code
Right arm/Right deltoid
R
Red
RA
White
Left arm/Left deltoid
L
Yellow
LA
Black
Right leg/Upper leg as
close to torso as possible
N or RF
Black
RL
Green
Left leg/Upper leg as
close to torso as possible
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
3.2 Preparing the Patient
3.2.1 Instructing the Patient
Before attaching the electrodes, greet the patient and explain the procedure. Explaining the
procedure decreases the patient’s anxiety. Reassure the patient that the procedure is painless.
Privacy is important for relaxation. When possible, prepare the patient in a quiet room or area
where others can’t see the patient. Make sure that the patient is comfortable. The more relaxed
the patient is, the less the ECG will be affected by noise.
3.2.2 Preparing the Skin
Thorough skin preparation is very important. The skin is a poor conductor of electricity and
frequently creates artifacts that distort the ECG signals. By performing methodical skin
preparation, you can greatly reduce the possibility of noise caused by muscle tremor and baseline
drift, ensuring high-quality ECG waves. There is natural resistance on the skin surface due to dry,
dead epidermal cells, oils and dirt.
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