Emerson 1154 manual Section Calibration, Overview Calibration, Span Adjustment Zero Adjustment

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Reference Manual

00809-0100-4514, Rev BA January 2008

Rosemount 1154

Section 3

Calibration

OVERVIEW

CALIBRATION

Span Adjustment

Zero Adjustment

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1 Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-1 Calibration Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . page 3-2

Each transmitter is factory calibrated to the range specified by the customer.

This section contains the following transmitter calibration information:

•Calibration

Span Adjustment

Zero Adjustment

•Calibration Procedures

Zero and Span Adjustment

Linearity Adjustment

Damping Adjustment

Correction for High Line Pressure

The Rosemount 1154DP, HP, and GP transmitters are factory calibrated to the range shown on the nameplate. This range may be changed within the limits of the transmitter. Zero may also be adjusted to elevate or to suppress. The span and zero adjustments are external and located under

the nameplate.

The span on any Rosemount 1154 transmitter is continuously adjustable to allow calibration anywhere between maximum span and 1/6 of maximum span (1/4 of maximum span for Range Code 0). For example, the span on a Range Code 4 transmitter can be continuously adjusted between 0–150 and 0–25 inH2O.

The zero can be adjusted for up to 500 percent of span suppression (300 percent for Range Code 0) or 600 percent of span elevation (400 percent for Range Code 0) (see Figure 3-1 on page 3-2).

The zero may be elevated or suppressed to these extremes with the limitation that no applied pressure within the calibrated range exceeds the full-range pressure limit. For example, a Range Code 4 transmitter cannot be calibrated for 150 to 200 inH2O (only 300 percent zero suppression) because the 200 inH2O exceeds the 150 inH2O upper range pressure limit of a Range Code 4.

The transmitter may be calibrated to cross zero, (e.g., –75 to 75 inH2O) but this may result in a slight loss of linearity.

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Contents Reference Manual RosemountImportant 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 Overview About the Transmitter Section IntroductionRosemount Overview General Considerations Section InstallationProcess Connections Mechanical ConsiderationsRosemount Electrical Considerations ConduitTransmitter Wiring Connections Mechanical InstallationProcedures Range Code Pressure DimensionElectrical Liquid ServiceTransmitter Terminal Block Rosemount Overview Calibration Span Adjustment Zero AdjustmentSection Calibration Zero and Span Adjustment Calibration ProceduresZero and Span Adjustment Screws Linearity Adjustment Linearity and Damping Adjustment Damping AdjustmentRosemount Calculate zero adjustment correction in terms of pressure Rosemount Overview Transmitter Operation Section OperationΔ-Cell Demodulator Linearity AdjustmentFV Iref Overview Maintenance TroubleshootingTest Terminals Board Checkout Safety MessagesSensing Module Checkout Process Flange Removal Disassembly ProcedurePart Description Rosemount 1154 Parts ListReassembly Procedure Rosemount Process Flange Reassembly On Next Post Assembly TestsSymptom Potential Source Corrective Action Check for adequate voltage to the transmitter Nuclear Specifications Specifications and Reference DataPerformance Specifications Range Code Overpressure Effect Range Code Response Time Functional SpecificationsRange Code Static Pressure Zero Effect 25 to 0-150 inH2O 0-6.22 to 0-37.3 kPa Range Code Pressure RangesRange Code Overpressure Limit Physical SpecificationsRosemount Ordering Information Rosemount 1154DP 1154HP 1154GP Part Description Order No Rosemount 1154DP, 1154HP, and 1154GP Spare PartsFor 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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