Cameron Barton 199 User Manual

32 pages

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MODEL 199

DIFFERENTIAL PRESSURE UNIT (DPU)

Standard and NACE Service

User Manual

Manual No. 9A-10030, Rev. 01

January 2008

CONTENTS

Section 1 - Introduction .................................................................. Page 3

Section 2 - Theory of Operation .................................................... Page 5

Section 3 - Installation/Operation ................................................ Page 9

Section 4 - Maintenance, Adjustment, & Calibration ................. Page 13

4-1. Tools Required for Maintenance and Calibration ............. Page 13

4-2. DPU Inspection and Cleaning............................................. Page 13

4-3. Calibration Setup .................................................................. Page 18

4-4. Torque Tube Rotation Check (Replacement Units) ......... Page 18

4-5. Range Change ....................................................................... Page 19

4-6. Setting Bellows Travel .......................................................... Page 22

4-7. Bellows Unit Assembly (BUA) Replacement .................... Page 22

4-8. Attaching Drive Arm to Torque Tube ................................. Page 24

4-9. Drive Arm Tightness Test .................................................... Page 24

4-10. Adjusting Pulsation Dampener ......................................... Page 25

4-11. Troubleshooting .................................................................. Page 25

Section 5 - Parts Drawing/List ....................................................... Page 27

Section 6 - Outline Dimension Drawings ..................................... Page 30

(This manual is for the DPU only.) Refer to the appropriate (separate)

instrument manual for information on the instrument being actuated.

Questions and Answers:

T
Teresa AllenAug 12, 2025
Why is my Cameron Barton 199 Measuring Instruments showing a high indication?
- H
  Hannah SimpsonAug 12, 2025
  If your Cameron Measuring Instruments are showing a high indication, it could be due to a partially restricted or too small orifice; clean out or replace it. Another cause could be a leak in the LP side piping, so repair any leaks. Gas trapped in the LP housing (liquid service) or liquid trapped in the HP housing (gas service) can also cause this; vent the housing. If the LP housing gasket is leaking, replace it. A broken range spring or a tampered DPU might also be the cause, in which case you should return the BUA for repair. Repair or replace any loose links or movements, or calibrate the instrument if it's out of calibration.
A
Amy WebbAug 22, 2025
What to do if Cameron Barton 199 show erratic indication?
- K
  Kathleen HughesAug 22, 2025
  If your Cameron Measuring Instruments are showing an erratic indication, it may be due to flow pulsation. Installing a dampening device upstream of the DPU run may help. Liquid trapped in gas piping or a gas bubble in liquid piping could also be the problem; remove it according to the Startup Procedure in Section 3. If the vapor generator is incorrectly installed, repipe it. If the reference leg is gassy or the liquid is vaporizing, refer to the piping instructions. Obstructions to the bellows travel can cause erratic readings, so clean the bellows. If gas is trapped in the DPU HP or LP housing, remove it according to the Startup Procedure in Section 3. Adjust or clean any dragging or dirty linkages, and adjust the pointer if it's dragging on the scale plate.