EE 230 Lab 10 Spring 2010

EE 230 Lab 10 Spring 2010 - EE 230 Experiment 10 ECG...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Page 1 of 6 EE 230 Experiment 10 ECG Measurements Spring 2010 Note: If for any reason the students are uncomfortable with doing this experiment, please talk to the instructor for the course and an alternative experiment will be assigned. Although we believe this experiment to be safe, electrodes will be placed on the body to take measurements and if large electrical signals are injected into these electrodes, the subject could be seriously injured or killed. We will exercise a reasonable level of precaution in this experiment but can not guarantee that the experiment is completely safe. CAUTION: MUST READ the FOLLOWING TWO PARAGRAPHS BEFORE PROCEEDING When conducting this experiment, the following procedures MUST be followed. First, the only piece of electrical equipment that should be attached to the circuit board when electrodes are attached to the body is the oscilloscope. Make sure that the ground terminal of the oscilloscope is connected to the ground in the circuit. Second, when the electrodes are attached to the body, the biasing of all circuitry should be with two 9V dc batteries. Third, students should only connect electrodes to a student when another individual is present and a TA or the course instructor is in the room. Finally, if for any reason any electrical shocks are experienced, immediately remove the electrodes from the subject. In preparation of the circuits, a “Body Emulator” will be built. The body emulator is a simple circuit that will provide signals of about the same amplitude as the ECG signals. The “Body Emulator” will be used during the development stages of this experiment. In this experiment, only two dc power supplies should be used, one should be set at +9V and the other at -9V. When working with the Body Emulator, normal laboratory procedures should be followed. Before the “Body Emulator” is replaced with the actual electrodes attached to the subject, disconnect the +9V and -9V dc power supplies and disconnect all test equipment except for the oscilloscope. Replace the +9V and -9V dc power supplies with 9V batteries. Verify that the circuit is still working using only the oscilloscope to make measurements with the 9V batteries. After the circuit performance is verified with the “Body Emulator” and the two 9V batteries, connect the electrodes on the subject in place of the two voltages on the “Body Emulator”. Any trouble shooting that is undertaken when the electrodes are placed on the subject should use only the oscilloscope for measurements. An optical isolator is often used when making measurements on the body and provides additional isolation between the test subject and the external instrumentation. To keep the scope of this measurement at a reasonable level, an optical isolator will not be used here. This experiment will focus on measuring electrocardiogram (ECG) signals that
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

EE 230 Lab 10 Spring 2010 - EE 230 Experiment 10 ECG...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online