Teledyne 6400A - Sulfur dioxide analyzer - Manual (Page 87)

TAI Model 6400A SO
2
Analyzer Operator Manual, 02164, Rev. G
7-5
Enter the expected SO
2
span gas concentration:
Table 7-3: Enter Expected Span Gas Concentrations Procedure
Step Number Action Comment
1. Press CAL-
CONC
This key sequence causes the 6400A to prompt for the
expected SO
2
concentration. Enter the SO
2
span concentration
value by pressing the key under each digit until the expected
value is set. This menu can also be entered from CALS.
2. Press ENTR ENTR stores the expected SO
2
span value.
3. Press EXIT Returns instrument to SAMPLE mode.
Table 7-4: Manual Span Calibration Procedure - Span Gas Through Sample Port
Step Number Action Comment
1. Press CAL The 6400A enters the calibrate mode. External span gas should
be fed to the sample port.
2. Wait 10 min Wait for reading to stabilize at span value
3. Press SPAN If you change your mind after pressing SPAN, you can still
press EXIT here without spanning the instrument.
4. Press ENTR Pressing ENTR actually changes the calibration equations and
causes the instrument to read the SO
2
span concentrations.
5. Press EXIT The 6400A returns to sampling. Immediately after calibration,
data is not added to the DAS averages.