BARTON
®
MODEL 289A/291B
DIFFERENTIAL PRESSURE
INDICATING SWITCHES
Installation Manual
Manual No. 10305, Rev. B
December 2004
[This manual is for the Indicating Switch only—refer to Model 199 DPU manual,
Part No. 10030, for detailed information about the DPU used with the indicating
switch.]
Table of CoNTeNTS
SAFETY .................................................................................................2
SECTION 1 - INTRODUCTION ........................................................3
1-1. General ............................................................................................3
1-2. Main Components ..........................................................................4
1-3. Indicating Switch .............................................................................5
1-4. Specifications ...................................................................................6
SECTION 2 - INSTALLATION ..........................................................7
2-1. General ............................................................................................7
2-2. Mounting/Piping/DPU Installation ...............................................7
2-3. Electrical Connection (Switches/Relays) ......................................7
2-4. Switch Use .......................................................................................7
2-5. Startup..............................................................................................7
SECTION 3 - MAINTENANCE AND CALIBRATION .................9
3-1. Required Tools ................................................................................9
3-2. DPU Installation/Test/Calibration/Maintenance .........................9
3-3. Bezel/Lens (or Cover) Installation and Removal ........................9
3-4. Calibration Check .........................................................................10
3-5. Pointer Installation and Removal ................................................10
3-6. Indicator Calibration ....................................................................11
3-7. Changing Switch Setpoint ............................................................12
3-8. Complete Calibration ...................................................................14
3-9. Preventative Maintenance............................................................15
3-10. Locking Drive Arm to Torque Tube ..........................................16
3-11. Troubleshooting ..........................................................................16
SECTION 4 - INSTALLATION DRAWINGS .................................19
SECTION 5 - PARTS DRAWINGS/PARTS LISTS .........................23
