WARNING!
Explosions could result in death or serious injury.
•
Verify the operating atmosphere of the sensor and transmitter is consistent with the
appropriate hazardous locations certifications.
•
Do not remove the transmitter cover in explosive atmospheres when the circuit is live.
•
Before connecting a HART-based communicator in an explosive atmosphere, make sure
the instruments in the loop are installed in accordance with intrinsically safe or non-
incendive field wiring practices.
•
Both transmitter covers must be fully engaged to meet explosion-proof requirements.
Failure to follow safe installation and servicing guidelines could result in death or serious
injury.
•
Installation should be performed by qualified personnel only.
•
Do not perform any service other than those contained in this manual.
•
Process leaks may result in death or serious injury.
•
The electrode compartment may contain line pressure; it must be depressurized before
the cover is removed.
High voltage that may be present on leads could cause electrical shock.
•
Avoid contact with leads and terminals.
10.3
Process noise profiles
1/f noise
This type of noise has higher amplitudes at lower frequencies, but generally degrades over
increasing frequencies. Potential sources of 1/f noise include chemical mixing and slurry
flow particles rubbing against the electrodes.
Spike noise
This type of noise generally results in a high amplitude signal at specific frequencies which
can vary depending on the source of the noise. Common sources of spike noise include
chemical injections directly upstream of the flowmeter, hydraulic pumps, and slurry flows
with low concentrations of particles in the stream. The particles bounce off of the
electrode generating a “spike” in the electrode signal. An example of this type of flow
stream would be a recycle flow in a paper mill.
White noise
This type of noise results in a high amplitude signal that is relatively constant over the
frequency range. Common sources of white noise include chemical reactions or mixing
that occurs as the fluid passes through the flowmeter and high concentration slurry flows
where the particulates are constantly passing over the electrode head. An example of this
type of flow stream would be a basis weight stream in a paper mill.
Digital Signal Processing
134
Rosemount
®
8732EM Transmitter with HART Protocol Reference Manual
Содержание Rosemount 8732EM
Страница 2: ......
Страница 6: ...Contents iv Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Страница 10: ...Safety messages 4 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Страница 14: ...Introduction 8 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Страница 30: ...Sensor Installation 24 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Страница 87: ...Field Communicator Dashboard Menu Tree HART v5 4 part 2 Figure 7 8 Operation Reference manual 81 ...
Страница 92: ...Operation 86 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Страница 138: ...Advanced Diagnostics Configuration 132 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Страница 158: ...Maintenance 152 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Страница 214: ...Product Certifications 208 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Страница 217: ...Wiring 8732EM using combination cable Figure C 2 Wiring Diagrams Reference manual 211 ...
Страница 221: ...Wiring Diagram 475 Field Communicator with 8732EM External Analog Power Figure C 6 Wiring Diagrams Reference manual 215 ...
Страница 222: ...Wiring Diagrams 216 Rosemount 8732EM Transmitter with HART Protocol Reference Manual ...
Страница 253: ...Implementing a Universal Transmitter Reference manual 247 ...