Emerson 00809-0100-4514, 1154 manual Reassembly Procedure

Page 40

Rosemount 1154

Reference Manual

00809-0100-4514, Rev BA January 2008

Electrical Housing Disassembly

Removing Sensor Module from Electrical Housing

REASSEMBLY

PROCEDURE

1.The signal terminals and test terminals are accessible by unscrewing the cover (1) on the terminal side. This compartment is identified as “terminal side” on the nameplate. The terminals are permanently attached to the housing and must not be removed.

2.Circuit boards are located in a separate compartment identified as “Circuit Side” on the nameplate. Remove power from the transmitter before removing the circuit side cover. Unscrew the cover (1) on the circuit side to access the circuit boards. A special cover wrench (RMT P/N 01153-0382-0001) is available from Rosemount to remove and replace the housing covers.

3.Unplug the amplifier board (6) after removing 3 holding screws (7).

4.The header assembly board (4) is permanently attached to the sensor module (12) and contains the temperature-compensating resistors. Carefully pull this board off the bayonet pins and rotate the board 180 degrees about the axis formed by the connecting leads. This allows access to the calibration board (5).

5.Disconnect the calibration board (5) by aligning the zero and span adjust screws so that their slots are perpendicular to the board. Remove the board by inserting a 6–32 screw in the rivnut on the board and carefully pulling the board off the bayonet pins.

6.If replacement of the zero and span adjustment screws (16) is necessary, remove the nameplate (17) and detach the snap rings (18) inside the housing.

1.Remove flanges per Process Flange Removal Section on page 5-4.

2.Remove amplifier board and calibration board as described in the Electrical Housing Disassembly Section above.

3.Loosen the lock nut (9).

4.Unscrew the sensor module (12) from the electronics housing, simultaneously turning the header board and leads to prevent them from being twisted or damaged. The threaded connection has a sealing compound on it and must be broken loose. Be careful not to damage the isolating diaphragms when unscrewing the sensor module. Then carefully pull the header assembly board (4) through the hole.

5.The sensor module (12) is a welded assembly and cannot be further disassembled.

NOTE

Numbers in parentheses refer to item numbers in Figure 5-2 on page 5-5.

NOTE

The Rosemount 1154 Pressure Transmitter contains electronic circuit boards which may be static sensitive.

5-6

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Contents Rosemount Reference ManualImportant Notice -- Errata Rosemount 1154 Alphaline Nuclear Pressure Transmitter Return of Material Changes From June 1999 to January Revision StatusNew Old Changes Rosemount Table of Contents Specifications Reference Data Maintenance TroubleshootingSection TOC-3 TOC-4 Section Introduction Overview About the TransmitterRosemount Section Installation Overview General ConsiderationsMechanical Considerations Process ConnectionsRosemount Conduit Electrical ConsiderationsTransmitter Wiring Connections Procedures InstallationMechanical Pressure Dimension Range CodeLiquid Service ElectricalTransmitter Terminal Block Rosemount Section Calibration Span Adjustment Zero AdjustmentOverview 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 Symptom Potential Source Corrective Action Post Assembly TestsOn Next Check for adequate voltage to the transmitter Specifications and Reference Data Nuclear SpecificationsPerformance Specifications Range Code Overpressure Effect Range Code Static Pressure Zero Effect Functional SpecificationsRange Code Response Time 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 ¤
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