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Cameron BARTON 289A - User Manual

Cameron BARTON 289A
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BARTON
®
NUCLEAR MODEL 289A
DIFFERENTIAL PRESSURE
INDICATING SWITCH
User Manual
Part No. 9A-C10310, Rev. 03
January 2019
Contents
Safety ............................................................................................................ 2
Section 1—Introduction ................................................................................. 3
General ......................................................................................................... 3
Main Components ......................................................................................... 3
Indicating Switch ...................................................................................... 4
Relays ....................................................................................................... 5
Wiring ........................................................................................................ 5
Differential Pressure Unit (DPU) ............................................................... 5
Specications ............................................................................................... 5
Nuclear Qualications ............................................................................... 6
Section 2—Installation ................................................................................... 7
General ......................................................................................................... 7
Mounting/Piping/DPU Installation ................................................................. 7
Electrical Connection (Switches/Relays) ...................................................... 7
Switch Use .................................................................................................... 7
Startup .......................................................................................................... 8
Switch and Relay Wiring Diagrams............................................................... 9
Section 3—Maintenance and Calibration ................................................... 14
Tools............................................................................................................ 14
Bezel/Lens (or Cover) Installation and Removal......................................... 14
Calibration Check........................................................................................ 15
Pointer Installation and Removal ................................................................ 16
Pointer Installation .................................................................................. 16
Pointer Removal ...................................................................................... 16
Indicator Calibration .................................................................................... 17
Drive Arm Tightness Test ......................................................................... 19
Drive Arm Stop Adjustment .................................................................... 20
Switch Calibration ..................................................................................... 20
Calibration Setup ..................................................................................... 20
Calibration Procedure ............................................................................. 21

Table of Contents

Other manuals for Cameron BARTON 289A

Questions and Answers

  • B
    Brian KelleyAug 18, 2025
    What to do if Cameron Switch gives erratic indication?
    • S
      Sandra CarlsonAug 18, 2025
      If your Cameron Switch gives an erratic indication, the issue might stem from several causes. If the flow is pulsating, for the M199 DPU, adjust the dampening. For all others, install a dampening device upstream of the DPU run. Ensure there isn't any liquid (in gas service) or gas bubble (in liquid service) trapped in the piping; if so, remove it. If you have a vapor generator, check that it is correctly installed; if not, re-pipe it. Remove any gas trapped in the DPU HP or LP housing, and adjust or clean any dragging or dirty linkage. If the pointer is dragging on the scaleplate, adjust its position. If there is reference leg gassy or liquid vaporizing, see piping instructions in DPU Manual. Finally, clean obstructed bellows.
  • D
    Darrell MartinezAug 22, 2025
    Why does my Cameron Switch have a high indication?
    • E
      Eric SchroederAug 22, 2025
      If your Cameron Switch shows a high indication, the problem could be due to a few reasons. Check if the orifice is partially restricted or too small; if so, clean it out or replace it. Inspect the LP side of the piping for leaks and repair them. Additionally, vent the housing to remove any trapped gas (in liquid service) or liquid (in gas service). If there's an LP housing gasket leak, replace the gasket. If the range spring is broken or the DPU has been tampered with, the BUA may need to be returned for repair.
  • P
    Patrick CarterAug 25, 2025
    How to troubleshoot inaccurate electrical alarm on Cameron Switch?
    • K
      Keith StoneAug 26, 2025
      If your Cameron Switch has an inaccurate or no electrical alarm, start by checking the fuse and replace it if it's blown. Inspect the wiring for any breaks or looseness and repair as needed. If the switch is not properly adjusted, adjust it. Finally, if the switch contacts are dirty or burned, replace them.
  • K
    Kelly JohnstonAug 31, 2025
    What to do if Cameron BARTON 289A show erratic indication?
    • E
      Elizabeth MoyerAug 31, 2025
      If you're experiencing erratic indication on your Cameron Measuring Instruments, it could be due to several reasons. The flow might be pulsating (install a dampening device upstream of the DPU run), liquid or gas bubbles might be trapped in the piping (remove them), the vapor generator might be incorrectly installed (re-pipe it), the reference leg might be gassy or liquid vaporizing (see piping instructions in DPU Manual), bellows travel might be obstructed (clean bellows), gas might be trapped in the DPU HP or LP housing (remove it), the linkage might be dragging or dirty (adjust or clean it), or the pointer might be dragging on the scale plate (adjust pointer position).
  • A
    Allison CarrollSep 4, 2025
    Why do Cameron BARTON 289A Measuring Instruments show high indication?
    • T
      tammy94Sep 4, 2025
      A high indication on your Cameron Measuring Instruments can stem from several causes. The orifice might be partially restricted or too small (clean out or replace it). Piping leaks on the LP side (repair leaks). Gas or liquid trapped in the housing (vent housing). An LP housing gasket leak (replace gasket). A range spring broken or DPU tampered with (return BUA for repair). Loose linkage or movement (tighten or replace). Or being out of calibration (calibrate).
  • W
    wmccartySep 7, 2025
    What causes inaccurate or no electrical alarm in Cameron BARTON 289A Measuring Instruments?
    • J
      Jonathan JonesSep 7, 2025
      If your Cameron Measuring Instruments are showing inaccurate or no electrical alarm, the problem could be a blown fuse (replace fuse), a broken or loose wire (repair it), a switch not properly adjusted (adjust switch), or dirty or burned switch contacts (replace switch contacts).
  • R
    Rhonda ChavezNov 14, 2025
    Why is my Cameron Switch showing low or no indication?
    • C
      craig88Nov 14, 2025
      If the Cameron Switch shows low or no indication, it could be due to several reasons. Start by checking for blockages upstream from the run and clean it out, or open the valve. Ensure that the orifice is correctly installed and not oversized; if it is, replace it. If there's a loss of liquid in the reference leg, refill it, making sure to use the same density liquid as the process media if density changes are the cause. Also, verify that the bypass valve is closed and not leaking, repairing any leaks if necessary. Open any closed block or shutoff valves, and repair any piping leaks on the HP side. Vent any trapped liquids or gases in the piping or housing. If the housing is filled with solids, clean it out. If none of these work, consider that the DPU may have been tampered with, and it ma...
  • L
    Laura LeeNov 27, 2025
    How to fix low or no indication on Cameron Measuring Instruments?
    • M
      Melissa PerezNov 28, 2025
      If your Cameron Measuring Instruments show low or no indication, several factors could be responsible. It might be due to an orifice installed backward or being over-sized (in this case, replace the orifice), a blockage upstream from the run (clean out the run or open the valve), loss of liquid in the reference leg (refill it), density changes in the process media or reference leg (refill the reference leg with the same density liquid as the process media), plugged pressure tap holes or piping (clean out the piping), an open or leaking bypass valve (close the bypass valve(s) and/or repair leaks), trapped liquids or gases in the piping (vent the piping), closed block or shutoff valves (open them), piping leaks on the HP side (repair the leaks), a housing filled with solids restricting bello...

Summary

Section 1-Introduction

General

Describes the weatherproof Model 289A, its case, and cover lens features.

Indicating Switch

Explains how the pointer moves and how switches are actuated by a cam.

Specifications

Lists technical specifications like temperature limits, switch types, and adjustability.

Nuclear Qualifications

Details the nuclear qualification applications based on engineering reports.

Section 2-Installation

General

Emphasizes inspecting the instrument for damage upon unpacking.

Electrical Connection (Switches;Relays)

Explains switch contact adjustability and refers to wiring diagrams.

Switch and Relay Wiring Diagrams

Illustrates wiring configurations for switches and relays.

Section 3-Maintenance and Calibration

Tools

Lists recommended tools for general maintenance of the indicating switch.

Calibration Check

Outlines the procedure to verify unit calibration against factory tolerances.

Indicator Calibration

Describes the complete calibration process for the instrument.

Switch Calibration

Describes pre-calibration checks and inspection of the switch mechanism.

Changing Switch Set Point

Details how to adjust switch set points and defines terms.

Troubleshooting

Offers guidance on diagnosing and resolving common issues.

Section 4-Assembly Drawing and Parts Lists

Table 4.1-Parts List, Model 289 A Indicating Switch

Lists all components, part numbers, and quantities for the indicating switch.

Table 4.2-Tefzel Insulation (Radiation Resistant) External Wire Leads

Lists part numbers for external wire leads based on length.

Section 5-Installation;Dimensional Drawings

Table 5.1-Model 289 A Dimensions

Provides a table of dimensions for different pressure ratings.

Figure 5.2-Model 289 A, side view

Illustrates the side view of the Model 289A with dimensions.

Figure 5.3-Model 289 A, rear view

Shows the rear view of the Model 289A with dimensions.

Product Warranty

Warranty

Outlines Cameron's warranty for its products.

Warranty Adjustment

Details the process for handling warranty claims and returns.

Exclusions from Warranty

Lists conditions under which the warranty does not apply.

Appendix A-Model 199 DPU User Manual

Section 1-Introduction

Introduces the Barton Model 199 DPU and its function.

Section 2-Theory of Operation

Explains the basic components and working principle of the DPU.

Section 3-Installation;Operation

Covers unpacking, mounting, and piping for the DPU.

Section 4-Maintenance, Adjustment, & Calibration

Details tools, inspection, cleaning, and calibration procedures for the DPU.

Section 6-Dimensional Drawings

Shows dimensional drawings of the DPU.

Cameron BARTON 289A Specifications

General IconGeneral
BrandCameron
ModelBARTON 289A
CategoryMeasuring Instruments
LanguageEnglish

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