Teledyne 9110EH - Nitrogen Oxides Analyzer - Manual (Page 56)

Optional Hardware and Software Model 9110EH Instruction Manual
Figure 5-3: M9110EH Ethernet Card and Rear Panel With Ethernet Installed
5.9. Sample Gas Conditioners
Several permeation devices using Nafion ® permeation gas exchange tubes are available for
applications with high moisture and/or moderate levels of NH
3
in the sample gas. This type
of sample conditioner is part of the standard M9110EH equipment to remove H
2
O and NH
3
from the ozone generator supply gas stream but can be purchased for the sample gas
stream as well. All gas conditioners remove water vapor to a dew point of about –20° C
(~600 ppm H
2
O) and effectively remove concentrations of ammonia up to about 1 ppm.
More information about these dryers and their performance is available at
http://www.permapure.com/.
The following options include the hardware required to install the dryers.
Table 5-4: Dryer and NH
3
Removal Options
Description
Standard Equipment Single gas conditioner (dryer / NH
3
removal) for ozone generator supply gas
stream only. Includes mounting bracket for two dryers (Option 86 mounts on
the back).
Single gas conditioner (dryer / NH
3
removal) for sample gas stream only.
Mounts on the back of the existing dryer bracket. Converts analyzer to dual-
conditioner instrument.
Single combination gas conditioner (dryer / NH
3
removal) for both the
sample gas and ozone supply air. Replaces the standard dryer for O
3
air and
comes with mounting bracket.
The combination conditioner is a low-cost option for drying both the sample gas and ozone
supply air with one dryer. However, this dryer can only be used in applications where both
sample and calibration gases (after dilution) are at or near ambient and constant concen-
trations of oxygen (about 20%), because the ozone generator needs a high and constant
amount of oxygen to generate ozone properly. Stack applications or industrial applications
in which the sample gas has a significantly reduced or highly variable concentration of
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