User's Manual

36 Specifications Welch Allyn Spot Vision Screener
DRA
F
T
EMC Table
Table 1. Emission Guidance
The Welch Allyn vision screener is intended for use in the electromagnetic environment specified below. The operator or the user of the device should
assure that it is used in such an environment.
Emission Test Compliance Electromagnetic environment guide
RF EmissionCispr 11 Group 1 The vision screener must emit electromagnetic
energy in order to perform its intended function.
Nearby electronic equipment may be affected.
RF EmissionCispr 11 Class B The vision screener is suitable for use in all
establishments other than domestic and those
directly connected to the public low-voltage
power supplies building used for domestic
purposes.
Harmonic EmissionIEC 61000-3-2 Class B
Compliant
Voltage Fluctuation/flicker Emission IEC 61000-3-
3
Compliant
Table 2. Immunity Guidance
The vision screener is manufactured to work in the electromagnetic environment specified below. The operator or user should make sure it is used within
those environmental conditions.
Immunity Test Test level EN 60601-1-2 Conformity Level Electromagnetic environment guide
Electrostatic Discharge
(ESD) EN 61000-4-2
± 8kV air
± 6kV contact
± 8kV air
± 6kV contact
The floor should be in wood, concrete or ceramic tile. If
the floor is covered with synthetic material, relative
humidity should be at least 30%.
Electrical Fast
Transient/Burst EN
601000-4-4
±2 kV high voltage
power line
±2 kV high voltage
power line
The quality of the power supply should be that one of a
typical commercial or clinical environment.
Surge EN 61000-4-5 Differential mode: ±1 kV
Common mode: ±2kV
Differential mode: ±1 kV
Common mode: ±2kV
The quality of the power supply should be that one of a
typical commercial or clinical environment.
Voltage dips, short
interruptions and
voltage variations on
power supply input
lines EN 61000-4-11
<5% UT (>95% dip of UT) for
0,5 cycle
40% UT (>60% dip of UT) for 5
cycle
70% UT (>30% dip of UT) for
25 cycle
<5% UT (>95% dip of UT) for 5
seconds
<5% UT (>95% dip of UT) for 0,5
cycle
40% UT (>60% dip of UT) for 5
cycle
70% UT (>30% dip of UT) for 25
cycle
<5% UT (>95% dip of UT) for 5
seconds
The quality of the power supply should be that one of a
typical commercial or clinical environment. If the user
requests a continuous functioning during power supply
interruptions, it is recommended a backup power supply
unit (UPS) or battery.
Magnetic field at power
frequency EN 61000-4-8
3 A /m 3 A /m Power frequency magnetic fields should have
characteristic levels of a typical commercial or clinical
environment.
Table 3. Immunity Radio Frequency Guidance
The vision screener is manufactured to work in the electromagnetic environment specified below. The operator or user should make sure it is used within
those environmental conditions.
Immunity Test Test level EN 60601-1-2 Conformity Level Electromagnetic environment guide