Remote Connection, Field Retrofit. Remote Housing Configuration. Performing Proof Test. AMS Suite. Channel Definitions. Parameters and Descriptions. Supported Units. Unit Codes. Diagnostics Device Errors.
Alarm Priority. I-7 Process Alarms. Signal Conversion. Block Errors. Alarm Detection. Status Handling. Advanced Features. Configure the AI Block. Procedures and instructions in this manual may require special precautions to ensure the safety of the personnel performing the operations.
Information that raises potential safety issues is indicated by a warning symbol. Refer to the safety messages listed at the beginning of each section before performing an operation preceded by this symbol.
Failure to follow these installation guidelines could result in death or serious injury. Failure to do so may impair the protection provided by the equipment. Any substitution of non-authorized parts or repair, other than exchanging the complete transmitter head or probe assembly, may jeopardize safety and is prohibited. Unauthorized changes to the product are strictly prohibited as they may unintentionally and unpredictably alter performance and jeopardize safety.
Unauthorized changes that interfere with the integrity of the welds or flanges, such as making additional perforations, compromise product integrity and safety. Equipment ratings and certifications are no longer valid on any products that have been damaged or modified without the prior written permission of Emerson Process Management.
Any continued use of product that has been damaged or modified without prior written authorization is at the customer's sole risk and expense. This manual provides installation, configuration and maintenance information for the Rosemount Series Radar Transmitter. Describes the operation and parameters of the Advanced Configuration transducer block. To expedite the return process outside of the United States, contact the nearest Emerson Process Management representative.
This center, available 24 hours a day, will assist you with any needed information or materials. Low power nano-second-pulses are guided along an immersed probe.
When a pulse reaches the surface, part of the energy is reflected back to the transmitter, and the time difference between the generated and reflected pulse is converted into a distance, which calculates the total level or interface level see below. The reflectivity of the product is a key parameter for measurement performance. Media with a high dielectric constant gives better reflection and a longer measuring range.
Reference Pulse. The Rosemount Series is well suited for chamber applications, such as distillation columns. The Rosemount with Dynamic Vapor Compensation will automatically compensate for dielectric changes in high pressure steam applications and maintain the level accuracy. The Rosemount Series Radar Transmitter has an aluminum or stainless steel SST transmitter housing containing advanced electronics and software for signal processing. SST housing is preferred for harsh environment applications, such as off-shore platforms or other locations where the housing can be exposed to corrodents, such as salt solutions and caustics.
The radar electronics produces an electromagnetic pulse that is guided by the probe. It comes with flange, threaded or Tri-Clamp process connection. The Rosemount Series Radar Transmitter is loop-powered, and it uses the same two wires for both power supply and output signal. With the HART protocol multidrop configuration is possible. In this case, communication is restricted to digital, since current is fixed to the 4 mA minimum value. The transmitter can be connected to a Rosemount Field Signal Indicator, or it can be equipped with an integral display.
For HART communication a minimum load resistance of within the loop is required. HART modem. Fieldbus modem. The following guidelines should be used to choose the appropriate probe for the Rosemount transmitter:. For interface measurements, a changing dielectric for the top fluid will degrade the accuracy of the interface measurement.
The measuring range depends on probe type and product properties, and is limited by the Upper and Lower Transition Zones. In these zones, measurement accuracy may be reduced.
The Upper Transition Zone is the minimum measurement distance between the upper reference point and the product surface. At the end of the probe, the measuring accuracy is reduced in the Lower Transition Zone. The Transition Zones vary depending on probe type and product. Figure illustrates how the measuring range is related to the Transition Zones:. Range 0. For low dielectric media, special configuration may be required. If using a PTFE centering disc, the lower transition zone is not affected.
Measurements in the Transition Zones may be non-linear, or have reduced accuracy. It is recommended the mA points be set between the Transition Zones. Signal Quality Metrics SQM diagnostic option can give an indication of how good the surface signal is compared to the noise, and when to clean the probe. Heavy product coating results in bridging between the two probes in a twin lead version, or between the pipe and inner rod for coaxial probes, and may cause erroneous level readings, so it must be prevented.
A single lead probe is recommended in these situations. The Rosemount Series Radar Transmitter measurement in foamy applications depends on the foam properties; light and airy or dense and heavy, high or low dielectrics, etc.
If the foam is conductive and creamy, the transmitter may measure the surface of the foam. If the foam is less conductive the microwaves may penetrate the foam and measure the liquid surface. In some applications, such as high pressure boiling water, there is a heavy vapor above the product surface that could influence the level measurement.
The Rosemount Series Radar Transmitter can be configured to compensate for the influence of vapor. The measuring range differs depending on probe type and characteristics of the application. Table can be used as a guideline for clean liquids. Consult you local Emerson Process Management representative for details. Figure Interface measurement with a Rosemount and a Rosemount fully submerged probe.
Interface Level. For measuring interface level, the transmitter uses the residual wave of the first reflection. Part of the wave, not reflected at the upper product surface, continues until it is reflected at the lower product surface. The speed of this wave depends fully on the dielectric constant of the upper product. The Rosemount Radar Master software has a built-in dielectric constant calculator to assist in determining the dielectric constant of the upper product.
For such applications, the maximum measuring range is limited by the length of the coaxial, rigid twin, and rigid single lead probes. For flexible probes, the maximum measuring range is reduced by the maximum upper product thickness, according to the diagram below. However, characteristics may vary between the different applications.
MaximumUpper Thickness,ft m. Maximum Upper Thickness, ft m. Sometimes an emulsion layer mix of the products forms between the two products and can affect interface measurements. For assistance with emulsion applications, consult your local Emerson Process Management representative. Because the radar signal is transmitted along a probe, the Rosemount Radar transmitter is generally not affected by objects in the tank. Avoid physical contact with metallic objects when Twin Lead or Single Lead probes are used.
Avoid physical contact between probes and agitators, as well as applications with strong fluid movement, unless the probe is anchored. If the probe is able to move 1 ft. The guided wave radar transmitter is insensitive to tank shape. Since the radar signal travels along a probe, the shape of the tank bottom has virtually no effect on the measurement performance.
The transmitter can handle flat or dish-bottom tanks. Procedures and instructions in this section may require special precautions to ensure the safety of the personnel performing the operations. Please refer to the following safety messages before performing an operation preceded by this symbol. Failure to follow safe installation and servicing guidelines could result in death or serious injury:. Use the equipment only as specified in this manual. Do not perform any services other than those contained in this manual unless you are qualified.
Make sure that the transmitter is handled carefully. If the Process Seal is damaged, gas might escape from the tank if the transmitter head is removed from the probe. Therefore, when the probe is used in a potentially explosive atmosphere, appropriate measures must be taken to prevent electrostatic discharge.
The transmitter can be mounted in nozzles by using an appropriate flange. The nozzle sizes given in Table show the recommended dimensions. For small nozzles, it may be necessary to increase the Upper Null Zone UNZ to reduce the measuring range in the upper part of the tank.
Amplitude Threshold adjustments may also be needed in this case. A Trim Near Zone is recommended in most nozzle installations, for example, when there are disturbing obstacles in the near zone. The probe should not contact the nozzle, with the exception of the Coaxial Probe. If the nozzle diameter is less than recommended, the measuring range may be reduced. Consult your local Emerson Process Management representative for details. A long stud - 10 in.
For single lead probes, avoid in. An alternative is to install a smaller nozzle inside the nozzle. Electromagnetic disturbances should be kept to a minimum since they may affect measurement performance.
The flexible single lead probe is recommended for solids and is available in two versions to handle different loads and lengths:. Tensile strength is minimum lb 12 kN Collapse load is maximum lb 16 kN. Tensile strength is minimum lb 29 kN Collapse load is maximum lb 35 kN. Keep the following in mind when planning installation of the Rosemount in solid applications:. Forces increase with the buried length, the silo, and probe diameter.
Guidelines for the tensile load from free-flowing solids acting on a suspended probe without any tie-down or weight in a smooth metallic wall silo as shown in Table A safety factor of 2 is included for the figures. Consult your local Emerson Process Management representative for more information. For environments where electrostatic discharges plastics are likely to occur, it is recommended that the probe end is grounded.
The chamber is also known as bridle, side pipe, bypass pipe, and cage. Dimensioning the chamber correctly and selecting the appropriate probe is key to the success in these applications. The disc is attached to the end of the probe, and thus keeps the probe centered in the chamber. Make sure that the probe does not come into contact with the chamber wall, e. To avoid disturbances from object near the pipe, metal-pipes are preferred, especially in applications with low dielectric constant.
Table The recommended chamber diameter is 3 in. Chambers with a diameter less than 3 in. Chambers larger than 6 in. It is recommended that single probes are used with the Rosemount Series.
Other probe types are more susceptible to build-up and are not recommended. The probe must not touch the chamber wall, should extend the full height of the chamber, but not touch the bottom of the chamber.
Probe type selection depends on probe length:. Less than If installation requires less head-space, use a Flexible Single Probe with a weight and centering disc. More than The extra gain provided by the twin and coaxial probes is not necessary; the electronics in the Rosemount Series is very sensitive and is not a limiting factor.
If using the flexible probe, the short weight is recommended. A short weight for the single flexible 0. The height is 2 in. For hot applications, the chamber should always be insulated to prevent personal injuries and to reduce the amount of energy needed for heating. See Figure It is often an advantage, and sometimes even required, for the radar measurement:. When mounting in a Rosemount chamber, the probe length to use can be calculated with these formulas:.
A Rosemount Series transmitter is the perfect replacement for an existing displacer chamber. To simplify installation, proprietary flanges are offered to allow for using the same chambers. When changing from a displacer to a Rosemount Series transmitter, make sure to correctly match the Series flange choice and probe length to the chamber.
This is an approximate value, actual length should be verified. For easy access to the transmitter, make sure it is mounted with sufficient service space. Direct Switch Technology gives increased sensitivity, high reliability, and long measurement ranges Signal Quality Metrics gives you the ability to work proactively with your level instrumentation Probe End Projection offers greater level measurement reliability Dynamic Vapor Compensation for improved plant heat rate Verification reflector for remote proof-testing and unique level transmitter verification Ultra-thin layer detection through Peak-in-Peak technology.
Download Case Study. Related Products. Compare Compare. Search Search. Filter by Press enter to collapse or expand the menu. Brands Brands. Facet Value. Item Type. Product Type. Centering Disk. Attach and tighten the housing cover. Tighten the cable gland, then plug and seal any unused terminals, and connect the power supply. In case it is the last transmitter on the bus, connect the termination resistor.
Figure A properly installed threaded conduit connection may provide sufficient ground. The HMC equipped transmitter contains intrinsically safe circuits that require the housing to be grounded in accordance with national and local electrical codes. If this wiring layout is used, there is an increased risk for communication disturbances due to differences in potential between grounding points. By using the same grounding point for Modbus Master and Power Supply, this risk is reduced.
For Star Topology connection, connect the termination resistor to the transmitter with the longest cable run. The external devices are separated by using the HART address.
The address must be different between the external devices and only addresses 1 to 5 are allowed for multiple slaves. The update rate depends on the number of connected devices and is shown in Table Both alternatives are described below. The transmitter will try to establish communication using different protocols during 20 second timeslots from time of startup. The transmitter will continue to use a communication protocol once communication has been established. Use the following settings:.
Connect the power wires or cycle power to the transmitter. Make sure HART address 1 is being scanned. Connect to the transmitter and perform the necessary configuration. After completing the configuration, disconnect the RS Converter, connect the Modbus communication wires and cycle power to the transmitter. Verify communication between the transmitter and the RTU is established can take up to 60 seconds from startup.
By default, the transmitters have HART address 1. It will not be possible to establish communication on HART address 1 if several transmitters have the same address. In this case, there are alternative solutions to establish communication:. Communication can now be established with an individual transmitter even if several devices have the same HART address.
Disconnect or turn off power from any other devices. Both the configuration tool and the RS bus can be connected simultaneously. Measurement data is not updated to the Modbus Master when a configuration tool is connected. Make sure that the measurement unit of the Primary Variable PV matches the configuration of the Modbus Host since the transmitter output value does not include any information on associated measurement units.
This reduces power consumption by locking the analog output at 4 mA.
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