Method1- Determining Sample Velocity Traverse Points; Figure 15 - Method 1 Traverse Points Required Window; Figure 16 - Top Section Of Method 1 Menu Section Window - Apex Instruments XC-5000 Operator's Manual

XC-5000

3.5 Method1- Determining Sample Velocity Traverse Points

Method 1 is the first step towards collection of a representative sample for measuring particulate concentration
and mass emission rate from a stack. The velocity and particle concentration in the stack are not uniform, so the
cross-section must be traversed. The basic premise is that for straighter lengths of stack or duct, flow streamlines
are more uniform and fewer traverse points are needed to obtain a representative sample. Conversely, the closer
the sampling site is to bends and flow disturbances, the more traverse points are needed to obtain a
representative sample. This method describes procedures to:
The procedure for determining the minimum number of traverse points is as follows:
a) From the XC-5000User Interface Main Menu, click the
this menu is shown.
Note: This menu is not fully displayed. To access all information and fields,
click and drag the scroll bar control on the righthand side of the window.
b) If any data are already displayed in this menu's user input fields, it can be modified by either
Figure 15 – Method 1 Traverse Points Required
Figure 16 - Top Section of Method 1 Menu Screen
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button. The top portion of