Welch Allyn Spot VS100 Directions For Use Manual page 52

48 Specifications
The device is intended for use in the electromagnetic environment specified below. The customer or the user of the
device should assure that it is used in such an environment.
Immunity test
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
Surge EN
61000-4-5
Note1: 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 RF transmitters, an electromagnetic site survey should be
considered. If the measured field strength in the location in which the device is used exceeds the applicable RF
compliance level above, the device should be observed to verify normal operation. If abnormal performance is observed,
additional measures may be necessary, such as reorienting or relocating the device.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distances between portable and mobile RF communications
equipment and the device
The device is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The
customer or user of the device can help prevent electromagnetic interference by maintaining a minimum distance
Electromagnetic immunity
IEC 60601 test level Compliance level
3 Vrms 3 Vrms
150 kHz to 80 MHz
3 V/M, 80 MHz to 1 GHz 6 V/M
Differential mode: ±1 kV 10 V/M
Common mode: ±2kV
® ™
Welch Allyn Spot Vision Screener Model VS100
Electromagnetic environment -
guidance
Portable and mobile RF communications
equipment should be used no closer to any
part of the device, including cables, than
the recommended separation distance
calculated from the equation applicable to
the frequency of the transmitter.
Recommended separation distance
d=(1.17) 150 kHz to 80 MHz
d=(1.17) 80 MHz to 800 GHz
d=(2.33) x 800 MHz to 2.7 GHz
where P is the maximum output power
rating of the transmitter in watts (W) and d
is the recommended separation distance in
meters (m). Field strengths from fixed RF
transmitters, as determined by an
electromagnetic site survey
than the compliance level in each frequency
b
range . Interference may occur in the
vicinity of equipment marked with the
following symbol:
a
, should be less