Comen H3 - Maintenance of Main Unit, ECG Cable and Electrodes

Cleaning and Maintenance
7-5
7.3.3 Maintenance of Main Unit, ECG Cable and Electrodes
Caution
 Safety tests should be conducted periodically for the equipment at least
once every two years and the test mainly includes:
1) Check whether there is mechanical and functional damage for the main
unit and accessories.
2) Check whether there is damage for the safety marks;
3) Validate the functions of the equipment as described in the user manual;
4) Conduct the following safety test according to IEC 60601-1.
 Test the protective ground resistance, Limit:0.1

 Test the earth leakage current, Limit: NC 500μA, SFC 1000μA.
 Test the patient leakage current, Limit: NC 10μA, SFC 50μA (CF).
Main Unit:
 The main unit of the electrocardiograph should be protected from high
temperature, sunshine, humidity or impact. The dust shied should be covered
well if the equipment is not in use; when moving the electrocardiograph,
intense vibration should be avoided;
 Liquid should be protected from entering the equipment, or the performance
and safety of the equipment will be affected;
 The performance of the electrocardiograph should be tested periodically by
the medical instrument maintenance department.
Lead:
 The integrality of the ECG cable and lead wires should be examined
periodically;
 The lead wires should be aligned to avoid knotting and blending;
 The core wire and shielding layer are easier to be damaged, especially the
places near the plug of the two ends, do not pull or wrest forcibly when
using, nip the plug parts with hand;