Summary Of Quality Assurance Checks; Dynamic Multipoint Calibration Procedure - Teledyne 300E Instruction Manual

Model 300E Carbon Monoxide Analyzer
Instruction Manual

8.1.8. Summary of Quality Assurance Checks

Essential to quality assurance are scheduled checks for verifying the operational
status of the monitoring system. Every two weeks a Level 1 zero and span
calibration must be made on the analyzer. Level 2 zero and span checks should be
conducted at a frequency desired by the user.
In addition, an independent precision check between 8 and 10 ppm may be
required at least once every two weeks.
To provide for documentation and accountability of activities, a checklist should be
compiled and then filled out by the field operator as each activity is completed.

8.1.9. Dynamic Multipoint Calibration Procedure

8.1.9.1. Linearity test
After the zero and the 80% URL points have been set, generate a minimum of 3
additional approximately evenly spaced calibration points between zero and 80%
URL without further adjustment to the instrument. Allow the instrument to sample
these intermediate concentrations for about 10 minutes each and record the
instrument responses.
Plot the analyzer responses versus the corresponding calculated concentrations to
obtain a calibration relationship. Determine the best fit straight line (y = mx + b)
determined by the method of least squares (e.g., see Appendix J of Volume I of the
Q.A. Handbook
After the best-fit line has been drawn, determine whether the analyzer response is
linear. To be considered linear, no calibration point should differ from the best-fit
line by more than ±2% of full scale.
The checks described in this section, if carried out carefully, will provide reasonable
confidence that the M300E is operating properly. Checks should be carried out at
least every 3 months as the possibility of malfunction is always present.
If the linearity error is excessive and cannot be attributed to outside causes, check
the M300E system for:
1. Sample pressure higher than ambient – pressurized sample gas
2. Leaks
3. Correct flow
P/N 04288 REV: A
6
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EPA Protocol Calibration
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