18
Guidance and Ma
nufacturer’s Declaration - Electromagnetic Immunity
The CO Check is intended for use in the electromagnetic environment specified below. The customer or the user should assure that it is used in such an
environment.
Immunity
Test
IEC 60601 Test level
Complian
ce level
Electromagnetic environment guidance
Conducted
RF IEC
61000-4-6
Radiated RF
IEC 61000-4-
3
3 Vrms 150 KHz to
80 MHz
3 V/m 80 MHz to 2.5
GHz
[V1] V
[E1] V/m
Portable and mobile RF communications equipment should be used no closer to any part of the CO
Check, including cables, than the recommended separation distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended separation distance
d = [ 3.5
] √ P
V1
d = [3.5
] √ P 80 MHz to 800 MHz
E1
d = [ 7
] √ P 800 MHz to 2.5 GHz ……E1
Where P is the maximum output power rating of the transmitter in watts (W) according to the
transmitter manufacturer and d is the recommended separation distance in metres (m).
Field strengths from fixed RF transmitters, as determined by an electromagnetic site survey, a, should
be less than the compliance level is each frequency range. b
Interference may occur in the vicinity of equipment marketed with the following symbol:
NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects and people.
a Field strengths from fixed transmitters, such as base stations for radio (cellular / cordless) telephones and land mobile radios, amateur radio, AM and FM radio
broadcast and TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic environment due to fixed RD transmitters, an
electromagnetic site survey should be considered. If the measured field strength in the location in which the CO Check is used exceeds the applicable RD
compliance level above, the CO Check should be observed to verify normal operation. If abnormal performance is observed, additional measures may be
necessary, such as re-orienting or relocating the CO Check.
b Over the frequency range 150 KHz to 80 MHz, field strength should be less that [V1] V/m
