PARTICULATE SAMPLING SYSTEM HAVING FLOW CHECK DEVICE

摘要

A particulate sampling system (18) is disclosed. The particulate sampling system may include an exhaust sampling unit (24) and a dilution flow assembly (26) to supply dilution air to the exhaust sampling unit. The particulate sampling system may also include a total flow assembly (28) to receive dilution air and exhaust. The particulate sampling system may also include a flow regulation assembly (70, 72, 76, 80) configured to control flow rates in the dilution flow assembly and the total flow assembly. The particulate sampling system may further include a flow check assembly (32) configured to measure the accuracy of the flow regulation assembly.