Pass or Fail Checks for an SMT Reflow Oven Factory Acceptance Test
A buyer's guide to defining practical pass or fail checks for an SMT reflow oven factory acceptance test, using the 12-zone, 300 mm, 300 °C reference configuration as a starting point for RFQ and test planning.
Before signing off an SMT reflow oven, decide how you will judge a failed zone: does one out-of-tolerance reading stop acceptance, or does it trigger a retest? That single decision shapes the whole factory acceptance test and should be written into the purchase order before the demonstration.
Build the test around the reference configuration: 12 heating zones (6 upper, 6 lower), maximum PCB width 300 mm, and a temperature range from ambient to 300 °C. Treat these as catalog reference values, not guarantees for the supplied unit. Ask the supplier to state measured zone-to-zone consistency, warm-up time to a setpoint, and stability at a mid-range hold. For the 300 mm width, confirm the conveyor carries a board of that width without edge damage. For the upper limit, ask what is demonstrated at 300 °C and for how long.
Define pass criteria in advance: repeatability across consecutive runs, profile agreement with the set recipe, and alarm response when a zone is deliberately offset. A fail should be a recorded deviation, not an opinion.
Before requesting a quote, confirm with the supplier which checks are witnessed, what instrumentation and records are provided, how retests are handled, and whether the acceptance criteria can be attached to the order.