Service manual

iv Service Manual CNS-9701
In IEC 60601-1-2 Medical Electronic Equipment, Part 1: General Requirements for Safety, 2. Collateral
Standard: Electromagnetic compatibility-Requirements and test. Section 36. 202. 2 Radiated radio-
frequency electromagnetic fields, PATIENT COUPLED EQUIPMENT and/or SYSTEMS applicable IMMUNITY
test methods are under consideration at SC62A/WG13. The 3 V/m IMMUNITY level may be inappropriate
especially when measuring SpO
2
because physiological signals can be much smaller than those induced
by a 3 V/m electromagnetic field.
When measuring SpO
2
, various interference may produce false waveforms which look like pulse
waveforms. SpO
2
value and pulse rate may be measured from these false waveforms, causing the alarm to
function improperly.
When installing the monitor, avoid locations where the monitor may receive strong electromagnetic
interference such as radio or TV stations, cellular phone or mobile two-way radios.