Teledyne T101 - page 46

Getting Started Teledyne API – T101 Operation Manual
44
Table 3-9. NIST-SRM's Available for Traceability of H2S & SO2 Calibration Gases
NIST-SRM4 TYPE NOMINAL
CONCENTRATION
2730
2731
Hydrogen sulfide in N2
Hydrogen sulfide in N2
5000 ppb
20 ppm
1693a
1694a
1661a
Sulfur dioxide in N2
Sulfur dioxide in N2
Sulfur dioxide in N2
50 ppm
100 ppm
500 ppm
ZERO AIR
Zero air is similar in chemical composition to the earth’s atmosphere but without the gas
being measured by the analyzer, in this case H2S. If your analyzer is equipped with an
IZS or external zero air scrubber option, it is capable of creating zero air.
For analyzers without these options, a zero air generator such as the Teledyne API Model
701 can be used.
Once the appropriate pneumatic connections have been made, check all pneumatic fittings
for leaks using a procedure similar to that defined in Section 9.5.1.
07266B DCN6485