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Questions tagged [calibration]

20 questions
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Is sensor measurement uncertainty the same with its calibrator?

I'm trying to calibrate a proximity sensor A with another proximity sensor B. Say sensor B uncertainty is already known from the data sheet. However, for sensor A the uncertainty is nowhere to be found. So I try to calibrate sensor A with the…
el-cheapo
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Rule of Tens/Ten to 1 Rule in Measurement and Inspection

I'm trying to clarify my understanding about the requirements [read: best practices] for measurement resolution and measurement confidence. The "Rule of 10s" is a commonly tossed around guideline for measurement resolution that, to the best of my…
Argonax
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Quantifying Instrument Precision Using Multiple Measurements: Rounding

I'm working with a spectrometer that collects raw data as a 16-bit integer value, so the readout I get from a measurement always varies between 0 and 65,535. I'm trying to avoid implementing data with false precision in subsequent analysis of the…
AggroCrag
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Why we are using PT1 Damping in automobile Sensor values?

I got to know that most of the automobile manufactures are using PT1 Damping (concept like raising Linear/ PT1 failing time etc. ) algorithm in their sensor values. For example : PT1 damping is used in ABS Sensor value to determine the speed. PT1…
user2986042
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Calibrating a system with matrices

I have several monochromatic LEDs that are coupled with controlers (PWM), thermometers and light sensors (spectrometer). For each LED: The controlers allow me to change the voltage/current applied to the LEDs, which, in turn, modulate the light's…
adrienlucca.net
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Calibrate a sensor using another, already calibrated sensor

I have two light sensors. Sensor A is factory-calibrated and gives a linear response to the light at a certain wavelength. Sensor B is not calibrated. It may give a linear response to the light the same wavelength, but I don't know how linear the…
adrienlucca.net
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Emerging beam from PPLN waveguide not behaving well through optics

We have a pump laser beam that is coming out of a single mode fiber and butt coupled into a PPLN waveguide crystal. We are capturing the beam at the output of the crystal with the focusing lens in an attempt to collimate it into a beam. The emerging…
Bilal
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Referencing for Air Quality Monitoring

I asked the same question in electronics sub, but since it is more general I am asking it here again. I bought the Sharp dust sensor GP2Y1010AU0F. Below are the graph of readings indoor for ~5 minutes, it seemed quite smooth to me. The peak at the…
Ziya Keskin
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How can I calculate uncertainty based on measurements from multiple separate runs?

I am using standard test blocks to find the uncertainty of a supermicrometer, which is capable of measuring down to 1/10 of a micron. The issue is that it measures the EXACT same length within a run of even 100 measurements. Understandably, it is…
Gevorg Ter-Isahakyan
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Method for permanent adjustment of pitch and roll of a mounting plate

I have a 2D lidar mounted to a plate on a robot. I am looking for a method to adjust the pitch and roll of the plate so the plane of the laser is parallel to the ground. Currently, I am using thin metal shims, but I want to find an easier method…
Klik
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Thermistor - Steinhart-Hart Coefficients

In order to identify Steinhart-Hart coefficients for a thermistor, three known temperatures may be used to find three resistances. What is the best way to choose these temperatures to calibrate from? Is it more beneficial to use three…
K Sco
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I need to control the speed and direction of stepper motor through stepper motor and DAQ card

I am just a beginner in the world of LabVIEW and stepper motors. I am working on a coordinate measuring machine, which has a touch triggered probe and it moves on lead screws coupled with stepper motors. The stepper motor I have is NEMA-23 and it's…
Hamza Moghal
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How to determine unknown concentration of a surfactant in an aqueous solution?

I want your help in determining surfactant concentration in an aqueous solution. Surfactant is an anionic surfactant, namely Sodium Lauryl Sulfate (SLS). I have a pure SLS water solution whose concentration is unknown. Please help me through the…
Isha Arora
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Calibrating the commercial bar-type load cell for measuring weight at tilt

The commercial hobbyist bar-type load cell you buy at ebay for about 3 dollars or so has 4 strain gauges (two at the top and two at the bottom) for measuring weight that is perpendicular to the load cell downwards. Hence they are usually measuring…
DailyReader
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Is a candy/oil thermometer suitable for calibrating a soldering iron or hot air gun? Why/not?

Disclaimer: not sure if the question is on-topic here, but I'm not sure that any other community is better suited. If there is one, would you kindly direct me there? Background: I am looking into buying an SMD rework station. Most of the ones I can…
Gregorio Litenstein
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