2051cd manual

Bolts are identified by their head markings:. Only use bolts supplied with the or provided by Emerson Process Management as spare parts. When installing the transmitter to one of the optional mounting brackets, torque the bolts to in-lb. Use the following bolt installation procedure:. Torque the bolts to the initial torque value using a crossing pattern.

Torque the bolts to the final torque value using the same crossing pattern. Note: Rosemount T transmitters are direct mount and do not require bolts for process connection.

The piping between the process and the transmitter must accurately transfer the pressure to obtain accurate measurements. There are six possible sources of impulse piping error: pressure transfer, leaks, friction loss particularly if purging is used , trapped gas in a liquid line, liquid in a gas line, and density variations between the legs.

The best location for the transmitter in relation to the process pipe is dependent on the process. Use the following guidelines to determine transmitter location and placement of impulse piping:.

Avoid purging through the transmitter. Install and tighten all four flange bolts before applying pressure, or process leakage will result. When properly installed, the flange bolts will protrude through the top of the sensor module housing.

Do not attempt to loosen or remove the flange bolts while the transmitter is in service. Flange Adaptors:. The flange adapters allow users to disconnect from the process by removing the flange adapter bolts.

Use plant-approved lubricant or sealant when making the process connections. Refer to Dimensional Drawings on page for the distance between pressure connections. Leaving the flange in place, move the adapters into position with the o-ring installed. Clamp the adapters and the Coplanar flange to the transmitter sensor module using the larger of the bolts supplied. Tighten the bolts. Whenever you remove flanges or adapters, visually inspect the PTFE o-rings.

Replace with o-ring designed for Rosemount transmitter if there are any signs of damage, such as nicks or cuts. Undamaged o-rings may be reused. If you replace the o-rings, retorque the flange bolts after installation to compensate for cold flow.

Refer to the process sensor body reassembly procedure in Section 5: Troubleshooting. Use only the O-ring designed for the corresponding flange adaptor. Failure to install proper flange adapter O-rings may cause process leaks, which can result in death or serious injury. The two flange adapters are distinguished by unique O-ring grooves. Only use the O-ring that is designed for its specific flange adapter, as shown below.

PTFE Based. Do not apply torque directly to the sensor module. Rotation between the sensor module and the process connection can damage the electronics. To avoid damage, apply torque only to the hex-shaped process connection. Sensor Module. The electronics housing can be rotated up to degrees in either direction to improve field access, or to better view the optional LCD display.

To rotate the housing, perform the following procedure:. Loosen the housing rotation set screw using a 5 -in. Over rotating will damage the transmitter. Retighten the housing rotation set screw. Housing Rotation Set. Transmitters ordered with the LCD option are shipped with the display installed. Installing the display on an existing transmitter requires a small instrument screwdriver. Jumpers Top and Bottom.

Make sure all electrical installation is in accordance with national and local code. If all connections are not sealed, excess moisture accumulation can damage the transmitter. Make sure to mount the transmitter with the electrical housing positioned downward for drainage. To avoid moisture accumulation in the housing, install wiring with a drip loop, and ensure the bottom of the drip loop is mounted lower than the conduit connections or the transmitter housing.

Trim shield and insulate. Do not connect the power signal wiring to the test terminals. Voltage may burn out the reverse-polarity protection diode in the test connection. Remove the housing cover on terminal compartment side. Do not remove the cover in explosive atmospheres when the circuit is live.

Signal wiring supplies all power to the transmitter. Refer to Figure Plug and seal unused conduit connection on the transmitter housing to avoid moisture accumulation in the terminal side. Install wiring with a drip loop. Arrange the drip loop so the bottom is lower than the conduit connections and the transmitter housing. External power supply required; transmitters operate on 9.

The transmitter will withstand electrical transients of the energy level usually encountered in static discharges or induced switching transients. However, high-energy transients, such as those induced in wiring from nearby lightning strikes, can damage the transmitter. The transient protection terminal block can be ordered as an installed option Option Code T1 in the transmitter model number or as a spare part to retrofit existing transmitters in the field.

The lightning bolt symbol shown in Figure and Figure identifies the transient protection terminal block. Shield Connect Shield Back. If the security jumper is not installed, the transmitter will continue to operate in. The simulate jumper is used in conjunction with the Analog Input AI function block. This switch is used to simulate the measurement. When power is cycled to the transmitter, simulate is automatically disabled regardless of the position of the jumper. This prevents the transmitter from being accidentally left in simulate mode.

Therefore, to enable the simulate feature, the jumper must be inserted after power is applied to the transmitter. Simulate Jumper. Security Jumper. Use the following techniques to properly ground the transmitter case:.

Always ground the transmitter case in accordance with national and local electrical codes. The most effective transmitter case grounding method is a direct connection to earth ground with minimal impedance. Methods for grounding the transmitter case include:. This screw is identified by a ground symbol. The ground connection screw is standard on all Rosemount transmitters.

Refer to Figure for location of the External Ground Screw. External Ground. Grounding the transmitter case via threaded conduit connection may not provide sufficient ground continuity. Individual transmitters are clearly marked with a tag indicating the approvals they carry. Transmitters must be installed in accordance with all applicable codes and standards to maintain these certified ratings.

Refer to Appendix B: Approval Information for information on these approvals. The Integral Manifold is available in two designs: Traditional and Coplanar. The traditional Integral Manifold can be mounted to most primary elements with mounting adapters in the market today.

The Integral Manifold is used with the T in-line transmitters to provide block-and-bleed valve capabilities of up to psi bar. Inspect the PTFE sensor module o-rings. If the o-rings are damaged if they have nicks or cuts, for example , replace with o-rings designed for Rosemount transmitter. If replacing the o-rings, take care not to scratch or deface the o-ring grooves or the surface of the isolating diaphragm while you remove the damaged o-rings. Install the Integral Manifold on the sensor module.

Use the four 2. Finger tighten the bolts, then tighten the bolts incrementally in a cross pattern to final torque value. When fully tightened, the bolts should extend through the top of the sensor module housing.

If the PTFE sensor module o-rings have been replaced, the flange bolts should be re-tightened after installation to compensate for cold flow of the o-rings. Assemble the Manifold to the T In-line transmitter with a thread sealant. Align the Conventional Manifold with the transmitter flange. Use the four manifold bolts for alignment. Leak-check assembly to maximum pressure range of transmitter. In normal operation the two isolate valves between the process and instrument ports will be open and the equalizing valve s will be closed.

To zero the , close the isolate valve to the low pressure downstream side of the transmitter first. Next, open the center equalize valve s to equalize the pressure on both sides of the transmitter. The manifold valves are now in the proper configuration for zeroing the transmitter.

To return the transmitter to service, close the equalizing valve s first. Differential pressure transmitters used for liquid level applications measure hydrostatic pressure head. Liquid level and specific gravity of a liquid are factors in determining pressure head. This pressure is equal to the liquid height above the tap multiplied by the specific gravity of the liquid.

Pressure head is independent of volume or vessel shape. A pressure transmitter mounted near a tank bottom measures the pressure of the liquid above. Make a connection to the high pressure side of the transmitter, and vent the low pressure side to the atmosphere. Zero range suppression is required if the transmitter lies below the zero point of the desired level range. Figure shows a liquid level measurement example. Pressure above a liquid affects the pressure measured at the bottom of a closed vessel.

The liquid specific gravity multiplied by the liquid height plus the vessel pressure equals the pressure at the bottom of the vessel. To measure true level, the vessel pressure must be subtracted from the vessel bottom pressure. To do this, make a pressure tap at the top of the vessel and connect this to the low side of the transmitter. Vessel pressure is then equally applied to both the high and low sides of the transmitter.

The resulting differential pressure is proportional to liquid height multiplied by the liquid specific gravity. Low-side transmitter piping will remain empty if gas above the liquid does not condense.

This is a dry leg condition. Range determination calculations are the same as those described for bottom-mounted transmitters in open vessels, as shown in Figure Let X equal the vertical distance between the minimum and maximum measurable levels in.

Let Y equal the vertical distance between the transmitter datum line and the minimum measurable level in. Let h equal the maximum head pressure to be measured in inches of water.

Let e equal head pressure produced by Y expressed in inches of water. Condensation of the gas above the liquid slowly causes the low side of the transmitter piping to fill with liquid. The pipe is purposely filled with a convenient reference fluid to eliminate this potential error. This is a wet leg condition. The reference fluid will exert a head pressure on the low side of the transmitter.

Zero elevation of the range must then be made. See Figure Let Y equal the vertical distance between the transmitter datum line and the minimum measurable level 50 in. Let z equal the vertical distance between the top of the liquid in the wet leg and the transmitter datum line in. Let SG 1 equal the specific gravity of the fluid 1. Let SG 2 equal the specific gravity of the fluid in the wet leg 1.

Let e equal the head pressure produced by Y expressed in inches of water. Let s equal head pressure produced by z expressed in inches of water. A bubbler system that has a top-mounted pressure transmitter can be used in open vessels. This system consists of an air supply, pressure regulator, constant flow meter, pressure transmitter, and a tube that extends down into the vessel. Bubble air through the tube at a constant flow rate. Figure shows a bubbler liquid level measurement example.

Let Range equal zero to h. This section is organized by block information. Procedures and instructions in this section 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. As the backup LAS, the will take over the management of communications until the host is restored.

The host system may provide a configuration tool specifically designed to designate a particular device as a backup LAS. The Resource, Transducer, and all function blocks in the device have modes of operation. This in-line pressure transmitter is delivered installation-ready, and provides precise absolute and gage measurements.

This makes it a capable and an economical solution in various process industries. Your Model Number:. Your Model Number: T. Rosemount Range.

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