Emerson 755A User Manual
Page 3
Instruction Manual
245364-V
May 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Contents i
Model 755A
TABLE OF CONTENTS
PREFACE...........................................................................................................................................P-1
Definitions ...........................................................................................................................................P-1
Intended Use Statement.....................................................................................................................P-2
Safety Summary .................................................................................................................................P-2
General Precautions For Handling And Storing High Pressure Gas Cylinders .................................P-4
Documentation....................................................................................................................................P-5
Compliances .......................................................................................................................................P-5
1-0 DESCRIPTION
AND
SPECIFICATIONS..............................................................................1-1
1-1
Overview................................................................................................................................1-1
1-2
Oxygen Range on Front Panel Digital Display ......................................................................1-1
1-3
Oxygen Ranges for Recorder Readout .................................................................................1-2
1-4
Recorder Voltage and Current Outputs.................................................................................1-2
1-5
Automatic Pressure Compensation.......................................................................................1-2
1-6
Options ..................................................................................................................................1-2
a. Alarm...............................................................................................................................1-2
b. Case Mounting ................................................................................................................1-2
c. Electrical Power ..............................................................................................................1-2
1-7
Specifications ........................................................................................................................1-4
a. General ...........................................................................................................................1-4
b. Sample ............................................................................................................................1-4
c. Electrical..........................................................................................................................1-5
d. Physical...........................................................................................................................1-5
2-0 INSTALLATION ....................................................................................................................2-1
2-1
Unpacking..............................................................................................................................2-1
2-2
Location And Mounting..........................................................................................................2-1
2-3
Voltage Requirements ...........................................................................................................2-1
2-4
Electrical Connections ...........................................................................................................2-1
a. Line Power Connections .................................................................................................2-1
b. Recorder Connections ....................................................................................................2-2
c. Potentiometric Output .....................................................................................................2-2
d. Isolated Current Output (Optional)..................................................................................2-4
e. Output Connections for Dual Alarm Option ....................................................................2-4
f.
Alarm Output Connections..............................................................................................2-4
g. Alarm Relay Characteristics............................................................................................2-5
2-5
Calibration Gases ..................................................................................................................2-7
a. Zero Calibration Gas.......................................................................................................2-7
b. Downscale Standard Gas ...............................................................................................2-7
c. Upscale Standard Gas....................................................................................................2-7
2-6
Sample Handling ...................................................................................................................2-7
a. Sample Temperature Requirements...............................................................................2-7
b. Sample Pressure Requirements: General ......................................................................2-7
c. Normal Operation at Positive Gauge Pressures.............................................................2-9
d. Operation at Negative Gauge Pressures........................................................................2-9
e. Sample Flow Rate...........................................................................................................2-9
f.
Corrosive Gases .............................................................................................................2-10
2-7
Leak Test...............................................................................................................................2-10
2-8
Purge Kit (Optional) ...............................................................................................................2-11