And what you're really concerned about is getting the proper volumetric flow rate and that it's stable. The key is pressure is only an indication of flow rate. Often you see these little red mercury or alcohol manometers that they use in duct work. be using to performs these tests?įor measuring static pressures, it's just any kind of a pressure gauge or manometer. If they give you a flow rate, then you go to your piping and make the conversion using standard duct flow procedures. But the bottom line is you go to the manufacturer. Then the static pressure, if it's outside the oven, to create that flow rate is going to depend upon the geometry and dynamics of your exhaust piping. Some ovens may give you a pressure tap inside the oven within their known piping. The real critical parameter that most ovens will specify is a flow rate in cubic feet per minute or cubic meters per hour or some other volumetric flow rate. You've got to have the right exhaust and it's important. Well, certainly measuring pressure in an exhaust system is one way to quantify it. At what exhaust pressure normally should the oven be measured at? You had mentioned about proper exhausting of the reflow oven. We're here to answer your process questions regarding SMT and the associated realm. This is Jim Hall and Phil Zarrow, the Assembly Brothers, pick and place or place and pick. He is a pioneer in the science of reflow. He has vast experience in SMT equipment, materials and processes.Ī Lean Six-Sigma Master Blackbelt, Jim has a wealth of knowledge in soldering, thermal technology, equipment and process basics. With over 35 years experience in PCB assembly, Phil is one of the leading experts in SMT process failure analysis. Process Troubleshooting, Failure Analysis, Process Audits, Process Set-upĬEM Selection/Qualification, SMT Training/Seminars, Legal Disputes What is the proper exhaust pressure for a reflow over? Where should we measure the pressure? How should we measure pressure?īoard Talk Board Talk is presented by Phil Zarrow and Jim Hall of ITM Consulting. Proper Exhaust Pressure for Reflow Ovens? To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video.
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