PASCO CI-6539A EKG SENSOR - Manual (Page 10)

EKG Sensor 012–06852A
6
Setup
Connecting the EKG Sensor to a Person
Use three electrode patches per subject. The electrodes can be reused
but they tend to absorb moisture (they are very hygroscopic), and
therefore, reuse is not recommended.
• Because the electrical signal produced by the heart and detected
at the body’s surface is so small, it is very important that the
electrode patch makes good contact with the skin. Scrub the areas
of skin where the patches will be attached with a paper towel to
remove dead skin and oil.
• Avoid placing the electrodes over a large muscle, because the
electrical activity of the muscle will interfere with sensing the
voltage changes produced by the heart.
1. Peel three electrode patches from the backing paper. Firmly
place the first electrode on the right wrist. Place a second
electrode on the inside of the right elbow. Place the third
electrode on the inside of the left elbow. (This is one of several
possible arrangements for EKG electrodes on the body.) See
Figure 5.
• Be sure to place the electrodes with the tabs oriented in such a
way that the wire of the sensor can hang freely without twisting
the edge of the electrode patch.
2. Connect the micro alligator clips from the sensor to the tabs on
the edges of the electrode patches. See Figure 6.
• Connect the black (or “reference”) alligator clip to the right wrist
electrode patch. This is the reference point for the “Isoelectric”
line (baseline).
• Connect the green (or negative) alligator clip to the right elbow
electrode patch.
• Connect the red (or positive) alligator clip to the left elbow
electrode patch.
Figure 5
Connecting the EKG Sensor to a person
positive
(red)
to interface
EKG Sensor
negative
(green)
reference
(black)
+
-
➤ ➤ ➤ ➤ ➤ Note: The electrodes should be kept
in an airtight, clean, dry container for
storage.
Figure 4
Electrode patches on backing paper