Emerson 00809-0100-4514, 1154 manual Linearity Adjustment

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Rosemount 1154

Reference Manual

00809-0100-4514, Rev BA January 2008

Material

•Wire: 22-gauge tinned solid copper – Fed Spec QQW343, ASTM B33

•Solder: 60% tin, 40% lead (60/40) – Fed Spec QQ-S-571

•Flux: MIL F 14256, Type A, Fed Spec QQ-S-571 Type RA

Method

Figure 3-3. Jumper Wire Placement.

a.Locate the three turret terminals on the component side of the amplifier board. Remove any jumper wires between them (see Figure 3-3).

b.To elevate zero, connect a jumper wire between the middle terminal and the terminal marked “EZ” (see Figure 3-3,Detail B).

c.Wrap the jumper wire once around each terminal and cut off any excess.

d.Solder the jumper wire to the terminals using proper electronics soldering techniques. Clean solder joints thoroughly with isopropyl alcohol.

e.Plug the amplifier board back in and complete the zero adjustment.

To suppress zero, follow the same procedure, except connect the jumper wire between the middle terminal and the terminal marked “SZ” (see Figure 3-3,Detail C).

6.Recheck full scale and zero and fine tune if necessary.

NOTE

There is some mechanical backlash in the zero and span adjustments, so there is a dead band when you change the direction of adjustment. Because of the backlash, the simplest procedure, if the desired setting is overshot, is to intentionally overshoot a larger amount before reversing the direction of the adjustment.

DETAIL A

DETAIL B

DETAIL C

Moderate

(To Elevate Zero)

(To Suppress Zero)

Elevation/

 

 

Suppression

 

 

(No Jumper Wire)

Jumper

 

 

 

 

 

 

Wire

Jumper

 

 

 

 

Wire

Linearity Adjustment

In addition to the span and zero adjustments, there is a linearity adjustment located inside the transmitter on the amplifier board (see Figure 3-4 on page 3-5). Linearity is factory calibrated for optimum performance over the calibrated range of the instrument and is not normally adjusted in the field. If you want to maximize linearity over some particular range, use the following procedure:

3-4

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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 ¤
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