Teledyne T100, Инструкция по эксплуатации, Страница: 66 / 404

Getting Started
Teledyne ML - T100 UV Fluorescence SO2 Analyzer
66
measurements made with the Teledyne ML T100 UV Fluorescence SO
2
Analyzer, it is
recommended that you use a span gas with a SO
2
concentration equal to 80% of the
measurement range for your application.
EXAMPLE: If the application is to measure between 0 ppm and 500 ppb, an appropriate
span gas concentration would be 450 ppb SO
2
.
Cylinders of calibrated SO
2
gas traceable to NIST-Standard Reference Material
specifications (also referred to as SRM’s or EPA protocol calibration gases) are
commercially available. Table 3-12 lists specific NIST-SRM reference numbers for
various concentrations of SO
2
.
Table 3-12: NIST-SRM's Available for Traceability of SO
2
Calibration Gases
NIST-SRM Type Nominal Concentration
1693a Sulfur dioxide in N
2
50 ppm
1694a Sulfur dioxide in N
2
100 pp
1661a Sulfur dioxide in N
2
500 ppm
2659a
1
O
2
in N
2
21% by weight
2626a CO
2
in N
2
4% by weight
2745
2
CO
2
in N
2
16% by weight
1
Used to calibrate optional O
2
sensor.
2
Used to calibrate optional CO
2
sensor.
3.5.7.3. SPAN GAS CONCENTRATION ADJUSTMENTS
Some applications, such as EPA monitoring, require a multipoint calibration procedure
where span gases of different concentrations are needed. We recommend using a bottle
of calibrated SO
2
gas of higher concentration in conjunction with a gas dilution
calibrator such as a Teledyne Model T700 (Figure 3-17) This type of calibrator
precisely mixes a high concentration gas with zero air (both supplied externally) to
accurately produce span gas of the correct concentration. Linearity profiles can be
automated with this model and run unattended over night.
3.6. INITIAL OPERATION
If you are unfamiliar with the T100 theory of operation, we recommend that you read
Section 9. For information on navigating the analyzer’s software menus, refer to the
menu trees described in Appendix A.1
CAUTION
GENERAL SAFETY HAZARD
Do not look at the UV lamp while the unit is operating. UV light can case eye
damage. Always use safety glasses made from UV blocking material. (Generic
plastic glasses are not adequate).