Electrical Requirements
WEST understands that availability of electrical power is different at each facility. For this reason WEST has constructed our fleet in such a manner that we may adapt to any environment. It is recommended that three separate circuits of 110 volt power or one 480 volt circuit be located within 100 feet of the base of the source. Gas-powered generators are available if electrical power is limited.
Stack Testing Port Locations
Most stack testing projects warrant two (2), three to four inch diameter testing ports at ninety degrees on each source. The physical location of the ports on the perpendicular plane of the gas flow are determined by the upstream and downstream distances to flow disturbances along the duct. The testing ports must be placed a minimum of 2 stack diameters downstream of any obstruction (i.e. bends, change in diameter) and a minimum of ½ stack diameters upstream of the exit or other obstruction.
Access Requirements
Platforms or scaffolding are the best access to port locations. However, on locations that do not allow for either, testing may be performed from boom lifts. All of our technicians are trained in the operation of boom lifts. In any case, stack samplers must be able to access the port locations for an extended amount of time. In most cases testers must remain at the port location throughout the duration of each test.