Product Manual

36 Specifications Welch Allyn Spot Vision Screener
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.
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.