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GETTING STARTED M102E/M501 TRS
(Addendum to M101E Manual - P/N 04740 Rev A)
Table 3-4: NIST-SRM's Available for Traceability of H
2
S & SO
2
Calibration Gases
NIST-SRM
4
TYPE
NOMINAL
CONCENTRATION
2730
2731
Hydrogen sulfide in N
2
Hydrogen sulfide in N
2
5000 ppb
20 ppm
ZERO AIR
• A gas that is similar in chemical composition to the earth’s atmosphere but without the
gas(es) being measured by the analyzer, in this case total reduced sulfur (TRS). While
TRS typically includes Hydrogen sulfide (H
2
S), Dimethyl sulfide (CH
3
)
2
, Dimethyl disulfide
(CH
3
)
2
S
2
and Methyl mercaptan (MeSH), CH
4
S many other gases fall into this category as
well. In addition other interferent gases may be present in ambient air as well.
To ensure that high quality zero air is available a zero air generator such as the Teledyne
Instruments Model 701 should be used.
• If your analyzer is equipped with an IZS option, it is capable of creating zero air that is
adequate for performing informal calibration checks, but a zero air generator such as the
Teledyne Instruments Model 701 is still recommended for performing formal calibration
operations.
11. Once the appropriate pneumatic connections have been made, check all pneumatic fittings for
leaks using a procedure similar to that defined in Section 11.5.1 of the M101E Manual - P/N
04740 Rev A.
3.6.2.1. Connections with Internal Valve Options Installed
If your analyzer is equiped with either the zero/span valve option (Option 50) or the internal
zero/span option (Option 51), the pneumatic connections should be made as shown in
Figures 3-9; 3-10 & 3-11:
14 05514 Rev A1