Ametek Land 4200, Руководство пользователя

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User Guide Model 4200 Dust & Opacity Monitor
5 Installation
5.1 Preliminary Considerations
The transmissometer should be mounted on the stack or duct in a position
where it can detect a representative concentration of dust across the stack/
duct diameter. For new plant systems the transmissometer's location should
be planned during the design stages; for existing systems it is critical that the
best possible location be selected. If the monitor is to be used for regulatory
compliance the location should be approved by the appropriate agency.
At the measurement location there should be as much negative pressure as
possible for example a stack updraft. The mounting area must have a safe
walkway; if necessary a sufficiently large and accessible platform should be
constructed (Figure 5.1).
Measurement errors may result if the transmissometer is exposed to strong
vibrations or if the stack/duct changes shape as the gas temperature changes.
If these are problems which cannot be avoided a vibration free mounting can
be installed. Land Instruments International can provide recommendations for
vibration free mountings upon request.
The ambient temperature at the mounting location must fall between -20°C and
+55°C (-4°F and 131°F). If necessary heating ventilation or isolation should be
used to ensure this temperature range is not exceeded.
Fig. 5-1 Measurement Area Platform