The definition of a Digital deveice per FCC part 15.3 is:
" Digital device. (Previously defined as a computing device.) An
unintentional radiator (device or system) that generates and uses timing signals
or pulses at a rate in excess of 9,000 pulses (cycles) per second and uses
digital techniques; inclusive of telephone equipment that uses digital
techniques or any device or system that generates and uses radio frequency
energy for the purpose of performing data processing functions, such as
electronic computations, operations, transformations, recording, filing,
sorting, storage, retrieval, or transfer. A radio frequency device that is
specifically subject to an emanation requirement in any other FCC Rule part or
an intentional radiator subject to Subpart C of this part that contains a
digital device is not subject to the standards for digital devices, provided the
digital device is used only to enable operation of the radio frequency device
and the digital device does not control additional functions or capabilities."
If your flow meter matches this definition and does not fall into the exemption
listed in:
"15.103 Exempted devices. - The following devices are subject only to the
general conditions of operation in
ยงยง15.5 and 15.29 and are exempt from the
specific technical standards and other requirements contained in this part. The
operator of the exempted device shall be required to stop operating the device
upon a finding by the Commission or its representative that the device is
causing harmful interference. Operation shall not resume until the condition
causing the harmful interference has been corrected. Although not mandatory, it
is strongly recommended that the manufacturer of an exempted device endeavor to
have the device meet the specific technical standards in this part.
(a) A digital device utilized exclusively in any transportation vehicle
including motor vehicles and aircraft.
(b) A digital device used exclusively as an electronic control or power
system utilized by a public utility or in an industrial plant. The term public
utility
includes equipment only to the extent that it is in a dedicated building or
large room owned or leased by the utility and does not extend to equipment
installed
in a subscriber's facility.
(c) A digital device used exclusively as industrial, commercial, or
medical test equipment.
(d) A digital device utilized exclusively in an appliance, e.g., microwave
oven, dishwasher, clothes dryer, air conditioner (central or window), etc.
(e) Specialized medical digital devices (generally used at the direction
of or under the supervision of a licensed health care practitioner) whether used
in a
patient's home or a health care facility. Non-specialized medical devices,
i.e., devices marketed through retail channels for use by the general public,
are not
exempted. This exemption also does not apply to digital devices used for
record keeping or any purpose not directly connected with medical treatment.
(f) Digital devices that have a power consumption not exceeding 6 nW.
(g) Joystick controllers or similar devices, such as a mouse, used with
digital devices but which contain only non-digital circuitry or a simple circuit
to convert
the signal to the format required (e.g., an integrated circuit for analog
to digital conversion) are viewed as passive add-on devices, not themselves
directly
subject to the technical standards or the equipment authorization
requirements.
(h) Digital devices in which both the highest frequency generated and the
highest frequency used are less than 1.705 MHz and which do not operate from
the AC power lines or contain provisions for operation while connected to
the AC power lines. Digital devices that include, or make provision for the use
of,
battery eliminators, AC adaptors or battery chargers which permit operation
while charging or that connect to the AC power lines indirectly obtaining their
power through another device which is connected to the AC power lines, do
not fall under this exemption.
(i) Responsible parties should note that equipment containing more than
one device is not exempt from the technical standards in this part unless all of
the
devices in the equipment meet the criteria for exemption. If only one of
the included devices qualifies for exemption, the remainder of the equipment
must
comply with any applicable regulations. If a device performs more than one
function and all of those functions do not meet the criteria for exemption, the
device does not qualify for inclusion under the exemptions."
Then FCC Part 15 applies, and EMI testing in accordance with ANSI C63.4 is
required.
Regards,
[email protected] on 11/03/99 12:08:12 PM
Please respond to [email protected]
Sent by: [email protected]
To: [email protected]
cc: (Wolfgang Josenhans/MW/US/3Com)
Subject: Flow Meter EMC requirements
Does anyone know what EMC standards are required
for flow meters?
Does it fall under Part15 for FCC
CE Mark - What testing is required??
Thanks
---------
This message is coming from the emc-pstc discussion list.
To cancel your subscription, send mail to [email protected]
with the single line: "unsubscribe emc-pstc" (without the
quotes). For help, send mail to [email protected],
[email protected], [email protected], or
[email protected] (the list administrators).
