Welch Allyn Medical Diagnostic Equipment Medical Alarms 8.1x Manual Do Utilizador

Chapter 11   Specifications

Welch Allyn  Acuity Central Monitoring System

The Acuity System is intended for use in the electromagnetic environment specified below. The customer or the user of 
the Acuity System should assure that it is used in such an environment.

Portable and mobile RF communications equipment 
should be used no closer to any part of the Acuity 
System, including cables, than the recommended 
separation distance calculated from the equation 
applicable to the frequency of the transmitter.

Conducted RF
IEC 61000-4-6

3 V

rms

150 kHz to 80 MHz

3 V

rms

d = 1.2 

Radiated RF
IEC 61000-4-3

3 V/m
80 MHz to 2.5 GHz

3 V/m

d = 1.2 

  80 MHz to 800 MHz

d = 2.3 

  800 MHz to 2.5 GHz

where P is the maximum output power rating of the 
transmitter in watts according to the transmitter 
manufacturer and d is the recommended separation 
distance in meters.
Field strengths from fixed RF transmitters, as 
determined by an electromagnetic site survey

a

, should 

be less than the compliance level in each frequency 
range

b

.

Interference might occur in the vicinity of equipment 
marked with this symbol:

Note 1

At 80 MHz and 800 MHz, the higher frequency range applies.

Note 2

These guidelines might 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 RF transmitters, an electromagnetic site survey should be considered. If the measured field 
strength in the location in which the Acuity System is used exceeds the applicable RF compliance 
level above, the Acuity System should be observed to verify normal operation. If abnormal 
performance is observed, additional measures might be necessary, such as reorienting or 
relocating the Acuity System.

b

Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.

P

P

P