Teledyne 6200E - Sulfides Analyzer - Manual (Page 185)

Model 6200E Instruction Manual EPA Protocol Calibration
M6200E Rev: A1 185
All operational adjustments to the M6200E should be completed prior to the calibration. The
following software features must be set into the desired state before calibration.
• Single range selection. See Section 6.7.4 of this manual. If the instrument will be used more
than one range, it should be calibrated separately on each applicable range.
• Automatic temperature/pressure compensation.
• Alternate units, make sure ppb units are selected for EPA monitoring. See Section 6.7.7.
The analyzer should be calibrated on the same range for monitoring. If the AUTO range mode is
selected, the highest of the ranges will result in the most accurate calibration, and should be used.
8.4.1. Precision Calibration
To perform a precision calibration, the instrument set up:
• Input sources of zero air and calibrated SO
2
span gas (see Table 7-1).
• Follow the procedures described in Section 7.2 for analyzer’s with no valve options or with
an IZS valve option (Do not use the method defined in Section 7.7).
• Follow the procedures described in installed and Section 7.5 for analyzer’s with Z/S options
installed.
8.4.2. Precision Check
A periodic check is used to assess the data for precision. A one-point precision check must be carried
out at least once every 2 weeks on each analyzer at an SO
2
concentration between 0.08 and 0.10
ppm. The analyzer must be operated in its normal sampling mode, and the precision test gas must
pass through all filters, scrubbers, conditioners, and other components used during normal ambient
sampling. The standards from which precision check test concentrations are obtained must be
traceable to NIST-SRM (see Table 7-1). Those standards used for calibration or auditing may be used.
To perform a precision check, the instrument set up; sources of zero air and SO
2
span gas and
procedures should conform to those described in Section 7.3 for analyzer’s with no valve options or
with an IZS valve option installed and Section 7.6 for analyzer’s with Z/S options installed with the
following exception:
• Connect the analyzer to a precision gas that has an SO
2
concentration between 0.08 and
0.10 ppm. If a precision check is made in conjunction with a zero/span check, it must be
made prior to any zero or span adjustments.
Record this value. Information from the check procedure is used to assess the precision of the
monitoring data; see 40 CFR 58 for procedures for calculating and reporting precision.
8.5. Dynamic Multipoint Span Calibration
Dynamic calibration involves introducing gas samples of known concentrations to an instrument in
order to record the instruments performance at a predetermined sensitivity and to derive a