Choosing The Appropriate Wide-Band Speed Filter - Thermo Scientific APEX 100 User Manual

Choosing the Appropriate Wide-Band Speed Filter

In this section you will learn how to select the appropriate wide-band speed filter setting
based on the average product speed—expressed, for example, in feet per minute.
Product speed is calculated from the product flow rate using the following formula.
2
Gpm/R x 6.13 = Fpm
Where:
Gpm = gallons per minute
R = inside radius of the pipe
Thus, the flow rate in gallons per minute, divided by the pipe's radius squared, times
6.13, equals the product flow rate in feet per minute (Fpm). Please note, however,
that in the examples given below, product flow rates are expressed in meters per
minute.
You can set the wide-band filter to the following speeds.
• Speed filter #1—Slow
This is the default setting and is used typically for products flowing from 10 to 75
meters per minute.
Slow Product Speed
• Speed filter #2—Medium
This is used typically for products flowing from 75 to 300 meters per minute.
Medium Product Speed
Page 88 Thermo Scientific APEX User's Guide