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Teledyne API
 - T100 UV Fluorescence SO2 Analyzer 
EPA Protocol Calibration 
 
 
217 
10.3. ZERO AND SPAN CHECKS 
A system of Level 1 and Level 2 zero span checks (refer to Table 10-4) is 
recommended. These checks must be conducted in accordance with the specific 
guidance given in the Q.A. Handbook Subsection 9.1 of Section 2.0.9. It is 
recommended Level 1 zero and span checks conducted every two weeks. Level 2 checks 
should be conducted in between the Level 1 checks at a frequency desired by the user. 
Span concentrations for both levels should be between 70 and 90% of the measurement 
range. 
Zero and span data are to be used to: 
  Provide data to allow analyzer adjustment for zero and span drift; 
  Provide a decision point on when to calibrate the analyzer; 
  Provide a decision point on invalidation of monitoring data. 
Items 1 and 2 are described in detail in Subsection 9.1.3 of Section 2.0.9 (Q.A. 
Handbook). Item 3 is described in Subsection 9.1.4 of the same section. 
Refer to troubleshooting in Section 12 of this manual if the instrument is not within the 
allowed variations. 
10.3.1.  ZERO/SPAN CHECK PROCEDURES 
The Zero and Span calibration can be checked a variety of ways. They include: 
  Manual Zero/Span Check - Zero and Span can be checked via the front panel 
control buttons. Please refer to Sections 9.3 and 9.6 of this manual. 
  Automatic Zero/Span Checks - After the appropriate setup, Z/S checks can be 
performed automatically every night. Refer to Section 9.8 of this manual for setup 
and operation procedures. 
  Zero/Span checks via remote contact closure - Zero/Span checks can be initiated 
via remote contact closures on the rear panel. Refer to Section 9.7.1 of this manual. 
  Zero/Span via RS-232 port - Z/S checks can be controlled via the RS-232 port. 
Refer to Section 8 and Appendix A-6 of this manual for more details. 
10.4. PRECISION CALIBRATION PROCEDURES AND CHECKS 
Calibration must be performed with a calibrator that meets all conditions specified in 
Subsection 2.9.2 (Q.A. Handbook). The user should be sure that all flow meters are 
calibrated under the conditions of use against a reliable standard. All volumetric flow 
rates should be corrected to 25
o
C (77
o
F) and 760mm (29.92in) Hg. Ensure that the 
calibration system can supply the range of the concentration at a sufficient flow over the 
whole range of concentration that will be encountered during calibration. 
All operational adjustments to the T100 should be completed prior to calibration. The 
following software features must be set to the desired state before calibration. 
06807C DCN6650