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A calibrated stopwatch?
Husain Shekhani • Jun 25, 2021
The measurement of time is perhaps is only quantity that can be measured extremely accurately by very low cost cost devices. However, when we look at qualification tests in regulated industries, we still require that stopwatches used for measuring time during an experiment to be calibrated.
The need for calibration is not driven by the need to ensure the watch is not wrong, but it is driven by the need to know that the watch is right.
This rule is true for all processes of manufacturing, data collection, and data analysis.
Are the validation for your processes based of the need to show *error-free operation* or the need to show *correct operation*? I believe the latter is superior
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How to use multiple transformers to increase voltage and power delivered to an ultrasonic transducer
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I hosted a webinar on December 8, 2023 on " How to make Impedance Measurements of Ultrasonic Transducers with the Digilent Analog Discovery " You can watch the recording on my YouTube Channel here: https://youtu.be/B8llEdp1X2o Here is a link to the pdf of the whiteboard notes: webinar21_digilent_impedance.pdf Here is a link to the calculation script: analog_discovery_impedance_script.txt Summary In this webinar, I show how to make impedance measurements of ultrasonic transducer with the Digilent Analog Discovery. I go over the following topics: (1) Overview of hardware (2) Settings overview and measuring the accuracy of the measurements (3) Measure impedance response of ultrasonic transducer – like an expert! *** Announcement *** My next webinar will be on Friday, December 15, 2023 at 11AM EST. I will cover "How to use two transformers to double voltage gain in an ultrasonic transducer drive circuit” Here is the link to sign up for the upcoming webinar: https://www.ultrasonicadvisors.com/monthly-ultrasonic-webinar
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