B&K Precision 2530B Instruction Manual download pdf (Page 12)

Figure 6:

At this point you should be using the smart cursor to make all your measurements for

the following activities.

1. Measure the EKG of a person who is at rest. Person whose EKG is being measured

should relax, remain still, and breathe normally. Someone else should operate the

computer while data is collected.

2. Next measure the EKG of the same person while she or he is standing up.

3. Measure the intervals between P-Q, QRS, and Q-T. An example of an EKG signal is

shown in Fig. 7. The following intervals are known as the P wave, the QRS complex,

and the T wave, respectively. Explain the signiﬁcance in relation to the heart. What

is the peak-to-peak value of the voltage between the R wave and the S wave? What is

the deﬁnition of this occurrence?

6.1 Additional questions and exercise

The sequence from P wave to T wave represents on heart cycle. The number of such cycles in

a minute is called the heart rate and is typically 70-80 cycles (beats) per minute at rest. What

was the frequency of your heart during the experiment (in beats/min and Hz)? Note: Do

not be alarmed if your EKG does not correspond to the numbers. These numbers represent

typical averages and many healthy hearts have data that fall outside of these parameters.

The sensor is NOT intended for medical diagnoses. You’re going to meaure your EKG cycle

before you exercise and after!

First measure the EKG at rest. Then disconnect the sensor wires from the electrode

patches, but leave the patches on the person whose EKG is being measured. Have the

person exercise for two minutes. Jogging in place or doing jumping jacks should be suﬃcient.

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B&K Precision 2530B Instruction Manual Page 12