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Instruction Manual
Model NGA2000 TO2
Introduce zero gas into the SAMPLE INLET, and, after a stable reading is reached, do the following:
1.Move the cursor to Technical Level Configu- ration... and enter. Select Diagnostic Menus…, then Analyzer Module Diagnos- tics…, and then Calibration parameters...
and enter.
2.Select the User zero calibration... to enter the User zero calibration menu.
NOTE:
Before proceeding any further, be sure that the zero value is stable and valid. The zero may take 24 hours or longer to achieve sta- ble zero for the low ranges.
3.Move the cursor to the Press the select key for user zero calibration now!
4.Press the ↵ key. The new zero calibration will now be entered.
5.Press the ← key to return to the previous menu.
6.Introduce a suitable span gas into the SAMPLE INLET and allow reading to stabi- lize. Move the cursor to the User span cali- bration... line and press the ↵ key.
7.Move the cursor to the Span gas concentra- tion: line and press the ↵ key. Enter the correct span gas value by using the ↑↓ keys to change value and the ←→ keys to select position. Press the ↵ key to enter the new span gas value.
8.Move the cursor to the Press the select key for user span calibration now! and press the ↵ key. The new span calibration will now be entered.
9.Press the ← arrow key to return to the pre- vious menu.
10.You can view the new calibration data in the Calibration data display screen. To access this screen go to the Expert controls and set up
set up... From the Analyzer module set up
11.If for any reason you want to restore the original factory calibration data, you can do so from the Advanced/Expert calibration
NOTE:
Do not alter data in the Load factory calibra- tion data...
12.Press the HOME softkey to
13.Press DISPLAY softkey for the Run Mode display.
If you are unable to calibrate the module for some reason, see the NGA Reference manual for a list of possible causes and solutions. The most likely cause is the use of incorrect span gases.
3-7 ROUTINE OPERATION
The TO2 Analyzer Module is designed to ana- lyze the sample stream continuously. Normally, it is never powered off except for servicing or for a prolonged shutdown.
Maximum permissible interval between calibration checks depends on the analytical ac- curacy required, and therefore cannot be speci- fied. Initially, the instrument should be checked at least once every
For details as to the general operation of the NGA analyzer module software, and the use of IO modules with the TO2 module, see the Plat- form Components manual.
Startup and Operation | Rosemount Analytical Inc. A Division of Emerson Process Management |