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  • Testers designed to check the performance of pulse oximeters; these testers deliver optical signals through an optical interface (e.g., an optomechanical finger) to the oximeter probe. Tests may be performed at preestablished heart rates or various saturation values (e.g., 45 beats per minute [bpm], 60 bpm, 90 bpm). Pulse oximeter testers are typically used to assess the pulse oximeter\'s ability to reproduce the calibration ratio of the absorption ratio curve (i.e., R curve) integrated by the manufacturer; some testers include capabilities for testing the electrical integrity of the probes (e.g., short circuits, open circuits).
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