SPAN PressureGuard PROTOCOL Owner's Manual page 18

Conducted RF 3 Vrms
IEC 61000-4-6
150 kHz to 80 MHz
Radiated RF 3 V/m
IEC 61000-4-3 80 MHz to 2,5 GHz
NOTE 1 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 3400 is used exceeds the
applicable RF compliance level above, the 3400 should be observed to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as reorienting or relocating the 3400.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
portable and mobile RF communications equipment and the 3400
The 3400 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the
user of the 3400 can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the 3400 as recommended below, according to the maximum output power of the
communications equipment.
Rated maximum 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 distance d 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.
NOTE 1 At 80 MHz and 800 MHz, the separation distance for 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.
Use of main power cords other than that supplied with product by Span‐America (P10509) may
affect EMC compliance with UL regulations. Power cords other than recommended by
manufacturer or at lengths other than supplied length may increase remissions or decrease
immunity.
3 Vrms
3 V/m
Recommended separation distances between
Separation distance according to frequency of transmitter
150 kHz to 80 MHz
d = 1,2
0,12
0,38
1,2
3,8
12
Portable and mobile RF communications equipment should be used no
closer to any part of the 3400, including cables, than the recommended
separation distance calculated from the equation applicable to the
frequency of the transmitter.
Recommended separation distance
d = 1,2
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
(W) according to the transmitter manufacturer and d is the
recommended separation distance in metres (m).
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 may occur in the vicinity of equipment marked with the
following symbol:
m
80 MHz to 800 MHz
d = 1,2
0,12
0,38
1,2
3,8
12
19
800 MHz to 2,5 GHz
d = 2,3
0,23
0,73
2,3
7,3
23
P10452 R6 CO# 2648