Teledyne gfc 7000ta Calibration Quality, Calibration Data Quality Evaluation, Offs

Calibration Procedures Model GFC7000TA Carbon Dioxide Analyzer

7.6.1. AutoCal with Auto or Dual Reporting Ranges Modes Selected

SETUP C.4		RANGE TO CAL: LOW
<SET	EDIT			EXIT
SETUP C.4		RANGE TO CAL: LOW
LOW HIGH			ENTR	SETUP
SETUP C.4		RANGE TO CAL: HIGH
<SET	EDIT			EXIT
SETUP C.4	SEQ 2) ZERO–SPAN, 2:00:30
PREV NEXT MODE SET				EXIT

EXIT returns to the

PRIMARY SETUP

Menu

NOTE

In order to automatically calibrate both the HIGH and LOW ranges, you must set

up a separate sequence for each.

7.7. 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 (Section 6.2.1 or Appendix A-3), all of which are automatically stored in the DAS channel CALDAT for data analysis, documentation and archival.

Make sure that these parameters are within the limits listed in Table 7-3 and frequently compare them to those values on the Final Test and Checkout Sheet that came attached to your manual, which should not be significantly different. If they are, refer to the troubleshooting Section 11.

Table 7-3: Calibration Data Quality Evaluation

FUNCTION	MINIMUM VALUE	OPTIMUM VALUE	MAXIMUM VALUE
SLOPE	0.700	1.000	1.300
OFFS	-0.500	0.000	0.500

These values should not be significantly different from the values recorded on the Teledyne Instruments Final Test and Validation Data sheet that was shipped with your instrument. If they are, refer to the troubleshooting Section 11.

Teledyne Analytical Instruments 176