CHAPTER 2, INSTALLATION AND OPERATION
98307600 Rev. C-1 2-7
2.1.2.3 Exhaust Connections
2.1.2.3.1 A Series
When making exhaust connections, locate the exhaust outlet away from the
sample inlet and occupied enclosed areas. Connect a 1/4" OD line from the
exhaust port to an exhaust manifold that vents outside of occupied areas. Lines
and fittings of materials other than those cited above can be used for these
connections.
2.1.2.3.2 B Series
Connect the exhaust port of the analyzer to a vacuum pump capable of 1 slpm at
15” Hg (50 kPa) vacuum (minimum capacity). The exhaust of the pump should be
connected to a manifold to vent the exhaust gas away from occupied areas.
An optional exhaust pump is available from Ecotech.
Caution
Flow in the EC9830B is calculated assuming
critical pressure across an orifice, thus the
exhaust vacuum must be maintained at less than
½ atmosphere (approximately 15” Hg or 50 kPa
at sea level) to keep the orifice critical. It is
recommended that the user install a vacuum
gauge on the exhaust line and periodically check
that sufficient vacuum is being maintained. If
pump performance deteriorates below this level,
flow indications from the analyzer will no longer
be valid.
2.2 AC Power Connection
Verify that the power selection switch on the rear panel and the power cord and
fuse are appropriate for your use. Move the switch right or left so the appropriate
voltage rating is visible on the switch. Figure 2-1 shows the voltage selection
switch.
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