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EPA Protocol Calibration
Model 400E Ozone Analyzer
Instruction Manual
200
P/N 04316 Rev: B
In addition, an independent precision check between 0.08 and 0.10 ppm may be
required at least once every two weeks. Table 8-3 summarizes the quality
assurance activities for routine operations. A discussion of each activity appears in
the following sections.
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.
Table 8-1: Daily Activity Matrix
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
°
F and 82
°
F), daily
fluctuations not greater
than
±
2
°
C.
Check thermograph
chart daily for
variations not greater
than
±
2
°
C (4
°
F).
Mark strip chart for the
affected time period.
Repair/adjust temp
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 supply and
chart paper.
Legible ink traces.
Correct settings of chart
speed and range
switches.
Correct time.
Weekly visual
inspection.
Replenish and chart
paper supply
Adjust recorder time to
agree with clock note
on chart.
Analyzer Operational
Settings
Flow and regulator
indicators at proper
settings.
Temperate indicators
cycling or at proper
levels.
Analyzer in sample
mode.
Zero/span controls
locked.
Weekly visual
inspection.
Adjust or repair as
needed.
Analyzer Operational
Check
Zero and span within
tolerance limits as
described in Subsec.
9.1.3 of Sec. 2.0.9
(Ref. 11).
Level 1 zero and span
every 2 weeks; Level
2 between Level 1
checks at frequency
desired by user.
Isolate source error,
and repair.
After corrective action
recalibrate analyzer.
Precision Check
Assess precision as
described in Sec. 2.0.8
(Ref. 11).
Every 2 weeks,
Sec. 2.0.8 (Ref. 11).
Calculate, report
precision,
Sec. 2.0.8 (Ref. 11).