C
ONTENTS
ii
April 2000 Rosemount Analytical 245364-U
Model 755A Oxygen Analyzer
S
ECTION
2. (
CONTINUED
)
2.2.1 Location and Mounting ............................................................... 2-1
2.3 VOLTAGE REQUIREMENTS .................................................................. 2-1
2.4 ELECTRICAL CONNECTIONS................................................................ 2-2
2.4.1 Line Power Connections............................................................. 2-2
2.4.2 Recorder Connections................................................................ 2-2
2.4.3 Output Connections for Dual Alarm Option ................................ 2-5
2.5 CALIBRATION ......................................................................................... 2-8
2.5.1 Zero Calibration Gas .................................................................. 2-8
2.5.2 Downscale Standard Gas........................................................... 2-8
2.5.3 Upscale Standard Gas ............................................................... 2-8
2.6 SAMPLE HANDLING ............................................................................... 2-8
2.6.1 Sample Temperature Requirements........................................... 2-8
2.6.2 Sample Pressure Requirements: General ................................. 2-9
2.6.3 Normal Operation at Positive Gauge Pressures......................... 2-10
2.6.4 Operation at Negative Gauge Pressures.................................... 2-10
2.6.5 Sample Flow Rate ...................................................................... 2-10
2.6.6 Corrosive Gases........................................................................ 2-11
2.7 LEAK TEST.............................................................................................. 2-11
2.8 PURGE KIT (OPTIONAL) ........................................................................ 2-12
S
ECTION
3. I
NITIAL
S
TARTUP AND
C
ALIBRATION
3.1 SELECTION OF RECORDER OXYGEN RANGE ................................... 3-1
3.1.1 Recorder Oxygen Range Selection Procedure........................... 3-1
3.1.2 Readout of Applied Zero-Suppression Voltage on
Digital Display............................................................... 3-5
3.2 STARTUP PROCEDURE......................................................................... 3-6
3.3 CALIBRATION ......................................................................................... 3-7
3.3.1 Calibration Using Digital Readout for Oxygen Readout.............. 3-7
3.3.2 Calibration Using Recorder for Oxygen Readout ....................... 3-7
3.3.3 Calibration with Downscale and Upscale Standard Gases......... 3-8
3.3.4 Calibration of Automatic Pressure Compensation ...................... 3-9
3.4 COMPENSATION FOR COMPOSITION OF BACKGROUND GAS ........ 3-10
3.4.1 Oxygen Equivalent Values of Gases .......................................... 3-11
3.4.2 Computing Adjusted Settings for Zero and Span Controls ......... 3-11
3.5 DUAL ALARM OPTION ........................................................................... 3-13
3.5.1 Inital Calibration and Selection of Setpoints for Alarms .............. 3-13
3.5.2 Selection of Deadband ............................................................... 3-14
