Testing the equipment, Step 2 – Welch Allyn CP 100 12-Lead Resting Electrocardiograph - User Manual User Manual
Page 63
Directions for Use
Chapter 6 Maintaining the Electrocardiograph
59
Testing the Equipment
Whenever the electrocardiograph is serviced or problems are suspected, Welch Allyn
recommends the following test procedures:
1.
Verify continued electrical safety of the device, using IEC 60601-1 or ANSI/AAMI ES1
methods and limits. Test for the following:
•
Patient leakage current
•
Chassis leakage current
•
Earth leakage current
•
Dielectric strength (AC and patient circuits)
2.
Verify that the electrocardiograph is working properly, using an ECG simulator to
acquire and print a standard 12-lead ECG of known amplitude.
•
Printing should be dark and even across the page.
•
There should be no evidence of print-head dot failure (no printing breaks forming
horizontal streaks).
•
Paper should move smoothly and consistently during printing.
•
Waveforms should appear normal, with proper amplitude, and without distortion
or excessive noise.
•
Paper should stop with perforations near the tear bar, indicating proper cue-
sensor operation. For tear-bar location, see
WARNING Only qualified service personnel should perform leakage current
tests.