Teledyne 9110EH - Nitrogen Oxides Analyzer - Manual (Page 155)

Model 9110EH Instruction Manual EPA Protocol Calibration
Table 8-4: Activity Matrix for Data Quality
Characteristic Acceptance Limits
Frequency and Method
of Measurement
Action if Requirements
are not Met
Shelter
temperature
Mean temperature between
22°C and 28°C (72° and
82° F), daily fluctuations not
greater than ± 2°C
Check thermograph chart
weekly for variations
greater than ± 2°C (4°F)
Mark strip chart for the
affected time period
Repair or adjust
temperature control
Sample
introduction
system
No moisture, foreign material,
leaks, obstructions; sample
line connected to manifold
Weekly visual inspection Clean, repair, or replace
as needed
Recorder Adequate ink & paper
Legible ink traces
Correct chart speed and range
Correct time Weekly visual inspection Replenish ink and paper
supply
Adjust time to agree
with clock; note on chart
Analyzer
operational
settings
TEST measurements at
nominal values
M200E in SAMPLE mode Weekly visual inspection Adjust or repair as
needed
Analyzer
operational
check
Zero and span within tolerance
limits as described in
Section 12 of the Q.A.
Handbook 6
Level 1 zero/span every
2 weeks; Level 2 between
Level 1 checks at
frequency desired by user
Find source of error and
repair
After corrective action,
re-calibrate analyzer
Precision check Assess precision as described
in Sections 15&18 of the Q.A.
Handbook
6
Every 2 weeks, Subsec.
3.4.3 (Ibid.)
Calc, report precision,
Section 12 of the Q.A.
Handbook
6
8.7. Short Calibration Checks
A system of Level 1 and Level 2 zero/span checks (Table 8-3) is recommended. These checks
must be conducted in accordance with the specific guidance given in Section 12 of the Q.A.
Handbook 6 . Level 1 zero and span checks must be 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.
These items are described in detail in Sections 15&18 of the Q.A. Handbook 6 . Refer to
Chapter 11 of this manual if the instrument is not within the allowed margins. We recommend
to use APICOM and the iDAS for analysis and documentation of zero/span check data.
8.7.1. Zero/Span Check Procedures
The Zero and span calibration can be checked in a variety of different ways. They include:
• Manual zero/span checks can be done from the front panel keyboard. The procedure
is in Section 7.3 or 7.6 of this manual.
M9110EH Rev 0 141