Teledyne 6200T - Sulfides Analyzer - Manual (Page 216)

EPA Protocol Calibration Model 6200T Total Sulfur Analyzer
216 Teledyne Analytical Instruments
10.1.7. Summary of Quality Assurance Checks
The following items should be checked on a regularly scheduled basis to assure high
quality data from the 6200T. Refer to Table 10-3 for a summary of activities. Also the
QA Handbook should be checked for specific procedures.
Table 10-3: Activity Matrix for Quality Assurance Checks
CHARACTERISTIC ACCEPTANCE LIMITS
FREQUENCY AND METHOD OF
MEASUREMENT
ACTION IF REQUIREMENTS ARE
NOT MET
Shelter temperature Mean temperature between
22 o C and 28 o C (72 o and
82 o F), daily fluctuations not
greater than ±2 o C
Check thermograph chart
weekly for variations greater
than ±2
o C (4 o 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
2. 6200T in SAMPLE mode 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 (Q.A. Handbook) Level 1 zero/span every 2
weeks; Level 2 between Level
1 checks at frequency desired
analyzer by user Find source of error and repair
After corrective action, re-
calibrate analyzer
Precision check Assess precision as
described in Sec. 2.0.8 and
Subsec. 3.4.3 (Ibid.) Every 2 weeks, Subsec. 3.4.3
(Ibid.) Calc, report precision, Sec. 2.0.8
(Ibid.)
10.2. Level 1 Calibrations versus Level 2 Checks
Essential to quality assurance are scheduled checks for verifying the operational status
of the monitoring system. The operator should visit the site at least once each week. It is
recommended Level 1 zero and span check conducted on the analyzer every two weeks.
Level 2 zero and span checks should be conducted at a frequency desired by the user.
Definitions of these terms are given in Table 10-4.
In addition, an independent precision check between 0.08 and 0.10 ppm must be carried
out at least once every two weeks. Table 10-3 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.