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Teledyne API M100E Analyzer Operation Manual Getting Started
33
3.4.1.2. SPAN GAS
A gas specifically mixed to match the chemical composition of the type of gas being measured at near full scale
of the desired measurement range. In this case, SO
2
measurements made with the Teledyne API M100E 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 3-7 lists specific NIST-SRM
referenc
e numbers for various concentrations of SO
2
.
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 API Model 700. 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.
Table 3-7: 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.
3.4.2. PNEUMATIC CONNECTIONS TO M100E BASIC CONFIGURATION
NOTE:
In order to prevent dust from getting into the gas flow channels of your analyzer, it was shipped with
small plugs inserted into each of the pneumatic fittings on the back panel.
Ensure that all of these dust plugs are removed before attaching
exhaust and supply gas lines.
Refer to Figure 3-2 and Table 3-2 for the location and descriptions of the various pneumatic inlets/outlets
referred to in this section.
Refer to Section 5.7 or information regarding the pneumatic setup of
M100E analyzers with various optional
calibration valve options installed.
04515F DCN6048