The T.O.V.A. USB device and microswitch (“the T.O.V.A. hardware”) must be installed and put into service according to the electromagnetic compliance (EMC) guidelines and declarations provided here.
Table A-1 Electromagnetic emissions Table A-2 Electromagnetic immunity Table A-3 Electromagnetic immunity for non-life-supporting equipment Table A-4 Recommended Separation Distances Between Radio-frequency (RF) Communications Equipment for Non-life-supporting Equipment
Note: Portable and mobile RF communications equipment can affect the operation of the T.O.V.A. hardware.
Warning: The use of accessories and cables other than those sold by The TOVA Company may result in increased emissions or decreased immunity of the T.O.V.A. hardware.
Table A-1. Guidance and manufacturer’s declaration— electromagnetic emissions
The T.O.V.A. hardware is intended for use in the electromagnetic environment specified below. The customer or user of the T.O.V.A. hardware should ensure that they are used in such an environment. Emissions Test Compliance Electromagnetic Environment— Guidance RF emissions CISPR 11 Group 1 The T.O.V.A. hardware uses RF energy only for its internal functions. Therefore, its RF emissions are very low and are not likely to cause any interference in nearby electronic equipment. RF emissions CISPR 11 Class B 33.5inThe T.O.V.A. hardware is suitable for use in all establishments, including domestic establishments and those directly connected to the public low voltage power supply network that supplies buildings used for domestic purposes. Harmonic emissions IEC 61000-3-2 Not Applicable Voltage fluctuations / flicker emissions IEC 61000-3-3 Not Applicable
Table A-2. Guidance and manufacturer’s declaration— electromagnetic immunity
The T.O.V.A. hardware is intended for use in the electromagnetic environment specified below. The customer or user of the T.O.V.A. hardware should ensure that they are used in such an environment. Immunity Test IEC 60601 Test Level Compliance Level Electromagnetic Environment—Guidance Electrostatic discharge (ESD) IEC 61000-4-2 ±6 kV contact ±8 kV air ± 6 kV contact ± 8 kV air Floors should be wood, concrete, or ceramic tile. If floors are covered with synthetic material, the relative humidity should be at least 30%. Electrical fast transient/burst IEC 61000-4-4 ± 2 kV for power-supply lines ± 1 kV for input/output lines ± 2 kV for power-supply lines ± 1 kV for input/output lines Mains power quality should be that of a typical commercial or hospital environment. Surge IEC 61000-4-5 ± 1 kV differential mode ± 2 kV common mode Not applicable Mains power quality should be that of a typical commercial or hospital environment. Voltage dips, short interruptions, and voltage variations on power-supply input lines IEC 61000-4-11 < 5% UT (> 95% dip in UT) for 0.5 cycle 40% UT (60% dip in UT) for 5 cycles 70% UT (30% dip in UT) for 25 cycles < 5% UT (> 95% dip in UT) for 5 sec. Not applicable Mains power quality should be that of a typical commercial or hospital environment. If the user of the T.O.V.A. hardware requires continued operation during power mains interruptions, it is recommended that the T.O.V.A. hardware be powered from an uninterruptible power supply or a battery. Power frequency (50/60 Hz) magnetic field IEC 61000-4-8 3 A/m 3 A/m Power frequency magnetic fields should be at levels characteristic of a typical location in a typical commercial or hospital environment.
Note: UT is the AC mains voltage before application of the test level.
Table A-3. Guidance and manufacturer’s declaration— electromagnetic immunity for non-life-supporting equipment
The T.O.V.A. hardware is intended for use in the electromagnetic environment specified below. The customer or user of the T.O.V.A. hardware should ensure that they are used in such an environment. Immunity Test IEC 60601 Test Level Compliance Level Electromagnetic Environment—Guidance Conducted RF IEC 61000-4-6 3 Vrms, 150 kHz to 80 MHz 3 Vrms 23inPortable and mobile RF communications equipment should be used no closer to any part of the T.O.V.A. hardware, including cables, than the recommended separation distance calculated from the equation applicable to the frequency of the transmitter.
Recommended separation:
d = 1.2 √P
d = 1.2 √P 80 MHz to 800 MHz
d = 2.3 √P 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 meters (m). Field strengths from fixed RF transmitters, as determined by the 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:
Radiated RF IEC 61000-4-3 3 V/m, 80 MHz to 2.5 GHz 3 V/m
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, and electromagnetic site survey should be considered. If the measured field strength in the location in which the T.O.V.A. hardware is used exceeds the applicable RF compliance level above, the T.O.V.A. hardware should be observed to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocation of the T.O.V.A. hardware.
b Over the frequency range 150 KHz to 80 MHz, field strengths should be less than 3 V/m.
Table A-4. Recommended separation distances between portable and mobile RF communications equipment and the T.O.V.A. hardware.
The T.O.V.A. hardware is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or user of the T.O.V.A. hardware can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the T.O.V.A. hardware as recommended below, according to the maximum output power of the communications equipment. 21.5inRated Maximum Output Power of Transmitter (in watts) Separation Distance According to
Frequency of Transmitter (in meters)150 kHz to 80 MHz d = 1.2 √P 80 MHz to 800 MHz d = 1.2 √P 800 MHz to 2.5 GHz d = 2.3 √P 0.01 0.12 0.12 0.23 0.1 0.38 0.38 0.73 1 1.2 1.2 2.3 10 3.8 3.8 7.3 100 12 12 23
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.
