Teledyne PEM-9004 - Portable emissions analyzer - Manual (Page 60)

Operation PEM-9004
Teledyne Analytical Instruments 48
SO
2
and NO
2
gases have a high solubility in water. For
measurement of SO
2
and NO
2
concentrations it is necessary to remove
the condensate residues form the gas filtration and drying system. These
residues can absorb SO
2
and NO
2
which could cause erroneous
measurements.
Furthermore, when carrying out SO
2
and NO
2
relevant
measurements no additional desiccant should be used. Even when dry
the dessicant can absorb a significant amount of SO
2
and NO
2
.
4.6 Macro Start
The Macro Start function launches configuration settings
previously programmed and saved as a macro. See Section 4.5.1.10.
Macros greatly facilitate the efficient operation of the PEM-9004
by loading and initiating convenient configuration settings using only a
few keystrokes. Up to three customized macros can be programmed and
used.
To launch a previously saved macro call the Macro Start function
by pressing the cycle button from the Main menu.