Teledyne 6200T - Sulfides Analyzer - Manual (Page 204)

Calibration Procedures Model 6200T Total Sulfur Analyzer
Teledyne Analytical Instruments 204
With dynamic calibration turned on, the state of the internal setup variables
DYN_SPAN and DYN_ZERO is set to ON and the instrument will reset the slope and
offset values for the SO
2
response each time the AutoCal program runs. This continuous
re-adjustment of calibration parameters can often mask subtle fault conditions in the
analyzer. It is recommended that, if dynamic calibration is enabled, the analyzer’s test
functions, slope and offset values be checked frequently to assure high quality and
accurate data from the instrument.
9.9. Calibration Quality
After completing one of the calibration procedures described above, it is important to
evaluate the analyzer’s calibration SLOPE and OFFSET parameters. These values
describe the linear response curve of the analyzer. The values for these terms, both
individually and relative to each other, indicate the quality of the calibration. To perform
this quality evaluation, you will need to record the values of both test functions (refer to
Section 4.1.1 or Appendix A-3), all of which are automatically stored in the DAS
channel CALDAT for data analysis, documentation and archival.
Ensure that these parameters are within the limits listed in the following Table.
Table 9-5: Calibration Data Quality Evaluation
FUNCTION MINIMUM VALUE OPTIMUM VALUE MAXIMUM VALUE
SLOPE -0.700 1.000 1.300
OFFS 50.0 mV n/a 250.0 mV
These values should not be significantly different from the values recorded on the
Teledyne Analytical Instruments Final Test and Validation Data sheet that was shipped
with your instrument. If they are, refer to troubleshooting in Section 12.