PASCO Pasport PS-2111 User manual

®
Instruction Sheet
012-08007G
EKG Sensor
PS-2111
*012-08800
Included Parts
1. EKG Sensor
2. Electrode patches, 100 pieces
Additional Part Required
• PASPORT-compatible interface
• PASCO Data Collection Software
Quick Start
1. Connect the EKG Sensor to your PASPORT
interface.
2. If you are using a computer, connect the
PASPORT interface to it and start the PASCO data
collection software.
3. Apply three electrode patches to the subject’s arms
and clip the leads to the electrodes patches as
illustrated in Figure 1.1.
4. Press or click the ‘Record’ or ‘Start’ button to begin
recording data.
Introduction
The EKG Sensor measures electrical signals produced
by the heart. The EKG trace, displayed on a connected
computer or datalogger, graphically illustrates the
beating of the heart.
Set-up
Connecting the EKG Sensor to an Interface
1. Connect the sensor’s plug to any port of a
PASPORT interfacer. Optionally, use a PASPORT
extension cable (PS-2500) between the interface
and the EKG Sensor.
2. If you are using a computer, connect the
PASPORT interface to it and start the data collec-
tion software.
1
2
For Educational Use Only! Note: This is not a medical device. It is designed for educational use only and should not
be used in any medical process such as life support or patient diagnosis. It is also not intended for use in graduate
research or industry including industrial control or any type of industrial testing.

®
EKG Sensor PS-2111
2012-08007G
Connecting the EKG Sensor to a Person
1. Rub the skin where the
electrode patches will be
applied with a paper towel
to remove dead skin and
oil.
2. Apply adhesive electrode
patches to the right wrist,
right forearm just below
the elbow, and left
forearm just below the
elbow (Figure 1.1). Press
the patches firmly for best
adhesion and signal
quality.
3. Clip the EKG leads to the electrode patches: black
to the right wrist, green to the right forearm, and
red to the left forearm.
4. Arrange the leads so that they hang loosely without
straining the patches.
Collecting Data
1. Press or click the ‘Record’ or ‘Start’ button to begin
recording data.
2. Have subject remain still during data collection.
About the Measurements
The sensor makes two measurements: Heart Rate in
beats per minute (BPM) and Voltage in millivolts (mV).
These measurements are recorded and displayed by the
computing device connected to the sensor.
Heart rate and voltage measurements are acquired at the
default rate of 200 samples per second. You can lower
the sample rate to 50 samples per second; however for
best results, use the default rate.
About the Electrocardiogram
Figure 1.2
To see the electrocardiogram (Figure 1.2), display
voltage versus time in a graph. One part of a typical
electrocardiogram is a ‘flat line’ or trace indicating no
detectable electrical activity. This line is called the
isoelectric line. Deviation from the isoelectric line
indicates electrical activity of the heart muscles. The
sensor’s Voltage measurement represents this deviation.
The first deviation from the isoelectric line in a typical
EKG is an upward pulse followed by a return to the
isoelectric line. This is called the P wave. This wave is
caused by the depolarization of the atria and is
associated with the contraction of the atria.
After a return to the isoelectric line there is a short delay
while the heart’s atrioventricular (AV) node depolarizes
and sends a signal along the atrioventricular bundle of
conducting fibers (the bundle of his) to the Purkinje
fibers, which bring depolarization to all parts of the
ventricles almost simultaneously.
After the AV node depolarizes there is a downward pulse
called the Q wave. Shortly after the Q wave there is a
rapid upswing of the line called the R wave followed by a
strong downswing of the line called the S wave and then
a return to the isoelectric line. These three waves
together are called the QRS complex. This complex is
caused by the depolarization of the ventricles and is
associated the with the contraction of the ventricles.
After a short period the sodium and calcium ions that
have been involved in the contraction migrate back to
their original location in a process that involves
potassium ions and the sodium-potassium pump. The
movement of these ions generates an upward wave that
then returns to the isoelectric line. This upward pulse is
called the T wave and indicates repolarization of the
ventricles.
The sequence from P wave to T wave represents one
heart cycle. The number of such cycles in a minute is
right
red
left
green
black
Figure 1.1
T wave
P wave
QRS complex

®
EKG Sensor PS-2111
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012-08007G
called the heart rate and is typically 70-80 cycles (or
beats) per minute at rest.
Safety
• The EKG Sensor is for Educational Use Only.
• Placement of the electrode patches on the body
provides an excellent path for current flow. Do not
connect anything to the electrode patches other
than the EKG Sensor as described in this
instruction sheet.
The sensor’s circuitry protects the test subject in two
ways: The sensor signal is transmitted through an
optical-isolation circuit and power for the sensor is
transferred through an isolation transformer. The circuitry
protects against accidental overvoltages of up to 4,000
volts.
Specifications
Technical Support
For assistance with any PASCO product, contact PASCO
at:
For more information about the EKG Sensor and the
latest revision of this Instruction Sheet, visit the PASCO
Web site at www.pasco.com
Limited WarrantyFor a description of the product warranty, see the
PASCO catalog.
Copyright
The PASCO scientific 012-08007D
EKG Sensor Instruction Sheet is
copyrighted with all rights reserved. Permission is granted to non-profit
educational institutions for reproduction of any part of this manual,
providing the reproductions are used only in their laboratories and
classrooms, and are not sold for profit. Reproduction under any other
circumstances, without the written consent of PASCO scientific, is
prohibited.
Trademarks
PASCO, PASCO scientific, and PASPORT are trademarks or registered
trademarks of PASCO scientific, in the United States and/or in other
countries. All other brands, products, or service names are or may be
trademarks or service marks of, and are used to identify, products or
services of, their respective owners. For more information visit
www.pasco.com/legal.
Product End of Life Disposal Instructions:
This electronic product is subject to disposal and recycling
regulations that vary by country and region. It is your
responsibility to recycle your electronic equipment per
your local environmental laws and regulations to ensure
that it will be recycled in a manner that protects human
health and the environment. To find out where you can
drop off your waste equipment for recycling, please
contact your local waste recycle/disposal service, or the
place where you purchased the product.
The European Union WEEE (Waste
Electronic and Electrical Equipment)
symbol (to the right) and on the product
or its packaging indicates that this
product must not be disposed of in a
standard waste container.
Voltage range 0 mV to 4.5 mV
Voltage resolution 4.5 microvolts
Default Sample Rate 200 samples per second
Maximum Sample Rate 1000 samples per second
Heart rate range 47 to 250 beats per minute
Heart rate resolution 1 beat per minute
Address: PASCO scientific
10101 Foothills Blvd.
Roseville, CA 95747-7100
Phone: [phone] (worldwide)
800-772-8700 (U.S.)
Web: www.pasco.com
Email: [e-mail]

®
EKG Sensor PS-2111
4012-08007G