User Manual

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IPN 074-289L
Composer Operating Manual
3.1.6 What is the Effect of Pressure Variation?
Because not all mixtures are purely ideal and the use of Diaphragms to
separate the toxic and corrosive gasses from the Exciting and Receiving
microphones is required, this Instrument System displays a small influence
from pressure changes. The effects of pressure variation on concentration are
shown in Figure 3-2.
Figure 3-2 Effect of pressure on apparent concentration
3.1.7 Should Sweep or Amplitude Track
Mode Be Used?
The standard measurement mode is Amplitude Track. Sweep mode is available
only with the optional Monitor software. Sweep is a diagnostic mode and is fully
described in section 8.3.6 on page 8-20.