Welch Allyn 719 Serie Gebrauchsanweisung Seite 18

12 A - English
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 handle and
charging accessory is used exceeds the applicable RF compliance level above, the handle and charging
accessory should be observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as reorienting or relocating the handle and charging accessory.
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 handle and charging accessory
The handle and charging accessory is intended for use in an electromagnetic environment in which radiated
RF disturbances are controlled. The customer or user of the handle and charging accessory can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the handle and charging accessory as recommended below,
according to the maximum output power of the communications equipment.
Rated max. output
power of
transmitter (W)
0.01
0.1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended separation distanced
in meters (m) can be estimated using the equation applicable to the frequency of the transmitter, where P is
the maximum output power rating of the transmitter in watts (W) according to the transmitter manufacturer.
Welch Allyn 719 Series Lithium Ion Handle and USB Charging Accessory
Electromagnetic immunity
Separation distance according to frequency of transmitter (m)
150 kHz to 80 MHz 150 kHz to 80 MHz
outside ISM bands in ISM bands
0.12 0.20
0.37 0.63
1.17 2.00
3.69 6.32
11.67 20.00
a
electromagnetic site survey , should be
less than the compliance level in each
b
frequency range . Interference may occur
in the vicinity of equipment marked with
the following symbol:
80 MHz to 800 MHz 800 MHz to 2.7
GHz
0.12 0.23
0.38 0.73
1.20 2.30
3.79 7.27
12.00 23.00