We received the same response from IAC. We also have IU-22s. When the tech pushes the Caliper button, a Caliper tab will appear on the touch screen. Within that, select Time/Slope and that is what is used to measure the reflux time. We resubmitted the exams one week later and IAC approved in less than 24 hours.
It was a real pain at first, because we get so into our routine, but it hasn’t added that much time to our exam now that it’s part of the flow. We only measure if it meets our criteria for significant.
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