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Operator Manual
748223-K
June 2002
ii Contents Rosemount Analytical Inc. A Division of Emerson Process Management
Model 7003M
3-4 Run Mode ..............................................................................................................................3-10
a. Display Oxygen Concentration/Sensor Temperature .....................................................3-10
b. Acknowledge Alarms ......................................................................................................3-10
c. Access Other Modes.......................................................................................................3-10
3-5 Setup Mode ...........................................................................................................................3-11
a. Security Code..................................................................................................................3-13
b. Current Output Range - 0-20mA or 4-20mA................................................................3-13
c. Range Endpoint Adjustments .........................................................................................3-13
d. Zero Offset Adjustment ...................................................................................................3-15
3-6 Alarm Mode vs. ON/OFF-Control Mode ................................................................................3-16
a. Relay Configured as Alarm.............................................................................................3-16
b. Relay Configured as ON/OFF-Controller........................................................................3-16
c. Relay Contacts................................................................................................................3-18
d. Fail Safe Operation .........................................................................................................3-18
e. Relay Reset Upon Fatal Error.........................................................................................3-18
f. Pressure Effects on Alarms ............................................................................................3-18
g. Setting Alarm and ON/OFF-Controller Relays................................................................3-18
h. Setting Alarm Setpoints ..................................................................................................3-18
i. Setting Alarm ON and OFF Levels .................................................................................3-19
4-0 CALIBRATION AND ADJUSTMENTS.................................................................................4-1
4-1 Frequency of Calibration .......................................................................................................4-1
4-2 Calibration mode ...................................................................................................................4-1
a. Zero Calibration...............................................................................................................4-1
b. Span Calibration..............................................................................................................4-1
c. Pressure Compensation - Correction for Constant Pressure Differences......................4-4
4-3 Hold Mode .............................................................................................................................4-5
4-4 Diagnostics Mode ..................................................................................................................4-8
a. Raw Sensor Voltage .......................................................................................................4-8
b. Test Current Output ........................................................................................................4-8
c. Linearizing Current Output..............................................................................................4-8
d. Test Alarm Relays...........................................................................................................4-10
4-5 Adjustments And Settings .....................................................................................................4-10
5-0 THEORY................................................................................................................................5-1
5-1 Principles Of Operation .........................................................................................................5-1
a. Electrochemical Theory ..................................................................................................5-1
5-2 Effects of Sample Conditions ................................................................................................5-1
a. Barometric Pressure .......................................................................................................5-1
b. Humidity ..........................................................................................................................5-1
c. Sample Temperature ......................................................................................................5-1
d. Interfering Gases.............................................................................................................5-2
5-3 Circuit Descriptions................................................................................................................5-2
a. Signal Board....................................................................................................................5-2
b. Power Supply Board .......................................................................................................5-2
c. Microprocessor Board.....................................................................................................5-2
d. Alarm Circuits..................................................................................................................5-2
6-0 ROUTINE SERVICING AND TROUBLESHOOTING...........................................................6-1
6-1 Routine Servicing ..................................................................................................................6-1
6-2 Troubleshooting.....................................................................................................................6-1
a. Symptoms .......................................................................................................................6-1