Emerson 00809-0100-4514, 1154 manual Mechanical Considerations, Process Connections

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Reference Manual

Rosemount 1154

00809-0100-4514, Rev BA

January 2008

Figure 2-1. Qualified

 

Life vs. Ambient Temperature.

 

 

Module

 

Qualified

 

Life

 

Electronics

 

Qualified Life

 

Time (Years)

 

Temperature (°F)

MECHANICAL CONSIDERATIONS

Process Connections

This section contains information you should consider when preparing to mount the transmitter. Read this section carefully before proceeding to the mechanical installation procedure.

Mount the Rosemount 1154 transmitter to a rigid support (a support with a fundamental mechanical resonant frequency of 40 Hz or greater). A mounting bracket included with the transmitter facilitates panel mounting. Figure 2-4 on page 2-6shows the qualified mounting configurations. The transmitter was seismic qualified with the bracket mounted with four 3/8-in. diameter bolts. Orientation with respect to gravity is not critical to qualification. However, if the transmitter is mounted with the flanges in a horizontal position, zero the transmitter to cancel the liquid head effect caused by the difference in height of the process connections.

If the transmitter is mounted to a non-rigid panel, the user must ensure that seismic input to the mounting bracket does not exceed qualification levels given in Rosemount Report D8400102.

Process tubing installation must prevent any added mechanical stress on the transmitter under seismic disturbances. This may be done by using stress-relief loops in the process tubing or by separately supporting the process tubing close to the transmitter.

The process connections to the transmitter flanges were qualified with 3/8-in. tubing using Swagelok® compression fittings. For options using 1/4–18 NPT connections, the user assumes responsibility for qualifying the interface.

The Swagelok tube fittings are shipped completely assembled for immediate use. Do not disassemble them before use; doing so may contaminate the fittings and result in leaks. Insert the tubing into the Swagelok tube fitting, making sure that the tubing rests firmly on the shoulder of the fitting and that the nut is finger tight. Tighten the nut one-and-one-quarter turns past finger tight to prepare the transmitter for use. Do not overtighten.

2-2

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Contents Rosemount Reference ManualImportant Notice -- Errata Rosemount 1154 Alphaline Nuclear Pressure Transmitter Return of Material New Old Changes Revision StatusChanges From June 1999 to January Rosemount Table of Contents Section Maintenance TroubleshootingSpecifications Reference Data TOC-3 TOC-4 Section Introduction Overview About the TransmitterRosemount Section Installation Overview General ConsiderationsMechanical Considerations Process ConnectionsRosemount Conduit Electrical ConsiderationsTransmitter Wiring Connections Mechanical InstallationProcedures Pressure Dimension Range CodeLiquid Service ElectricalTransmitter Terminal Block Rosemount Overview Calibration Span Adjustment Zero AdjustmentSection Calibration Calibration Procedures Zero and Span AdjustmentZero and Span Adjustment Screws Linearity Adjustment Damping Adjustment Linearity and Damping AdjustmentRosemount Calculate zero adjustment correction in terms of pressure Rosemount Section Operation Overview Transmitter OperationΔ-Cell Linearity Adjustment DemodulatorFV Iref Maintenance Troubleshooting OverviewSafety Messages Test Terminals Board CheckoutSensing Module Checkout Disassembly Procedure Process Flange RemovalRosemount 1154 Parts List Part DescriptionReassembly Procedure Rosemount Process Flange Reassembly On Next Post Assembly TestsSymptom Potential Source Corrective Action Check for adequate voltage to the transmitter Specifications and Reference Data Nuclear SpecificationsPerformance Specifications Range Code Overpressure Effect Range Code Response Time Functional SpecificationsRange Code Static Pressure Zero Effect Range Code Pressure Ranges 25 to 0-150 inH2O 0-6.22 to 0-37.3 kPaPhysical Specifications Range Code Overpressure LimitRosemount Ordering Information Rosemount 1154DP, 1154HP, and 1154GP Spare Parts Rosemount 1154DP 1154HP 1154GP Part Description Order NoFor use with existing N0026 transmitter only Spare Parts Shelf Life Important Notice Rosemount Current Control Current Limit Index-2 Page ¢00809-XXXX-XXXX ¤