Teledyne 6200A - Sulfides analyzer - Manual (Page 121)

TAI Model 6200A SO
2
Analyzer Operator Manual, 02164, Rev. G
Zero calibration procedure.
Table 7-10: EPA Zero Calibration Procedure
Step Number Action Comment
1. Press CAL The 6200A enters the calibrate mode from sample mode.
Allow the zero gas through the sample port.
2. Wait 10 min Wait for reading to stabilize at the zero value.
3. Press ZERO To select a zero calibration.
4. Press ENTR Pressing ENTR actually changes the equations
5. Press EXIT 6200A returns to the CAL menu.
1. Adjust the SO
2
concentration to approximately 80% of the URL of the range. The expected
SO
2
span concentration can be determined by measuring the cylinder and diluent flows and
computing the resulting concentration.
Calculate the expected concentration as follows.
[ ] [ ] SO
F
F
SO
gas
total
ga 2
= ×
s
----------------------------------- Equation 7.1
2
where;
[SO
2
]
gas
= cylinder gas concentration, ppm
F
gas
= SO
2
gas flow rate, cc/min.
F
total
= total(gas + diluent) flow rate, cc/min.
[SO
2
] = expected SO
2
concentration, ppm
Enter the expected concentration [SO
2
] using the procedure in Table 7-12. The expected span
concentration need not be re-entered each time a calibration is performed unless it is changed.
7-14