Questions tagged [calibration]

Correlate the readings of an instrument, sensor, etc. with those of a standard in order to check its accuracy. Adjust experimental results to take external factors into account or to allow comparison with other data.

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Calibrating RTL-SDR Power with 50 Ohm Load and Thermal/LNA Noise

Ultimately I'm generating some spectrum plots in L-Band (1200-1800 MHz) and I need to get calibrated flux units (dBm/Hz) for my y-axis. I need a little assistance on creating this memo. I've been ...
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Tektronix P6015 Replacement Potentiometer Considerations

I’ve acquired (saved from the landfill) an old Tektronix high voltage probe, model P6015. The probe body and cable are in decent condition, but I discovered two damaged potentiometers in the ...
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How to calculate total ADC error after adjustment/calibration?

I’ve some different ADC channels, extended/standard channels and Precision channels. So far I know should the TUE (total unadjusted error) be calculated like this: \$ TUE = \sqrt{e_{offset}^2 + e_{...
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EMC-BCI. Coil injection and probe were calibrated at 100 ohm

As the title says my coil injection and coil probe were calibrated into 100 ohm loop line Impedance and it resulted an insertion loss (dB) for the coil injection. and transfer impedance (dBΩ) coil ...
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41 views

How to Design method to Program & Calibrate a Panel of PCBs

I'm designing a sensor-package PCB which needs to be programmed and calibrated while still in a panel of 10. I'd like to avoid a large bed-of-nails type setup for this step so that the panel can ...
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74 views

Calibrating a k type themperature probe for a PID controller

I just purchased an inkbird PID controller with a k probe to controll a temperature in an oven. I calibrated the k probe at 60F using a trusted digital thermometer with 2 probes. I installed the probe ...
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1answer
41 views

Sensor input calibration for wider range

I get minimum voltage output from my sensor as 2.2V and max voltage as 2.65V. I want to change this voltage to 0-5V range so that the controller ADC can calibrate input in a wider range. How can I do ...
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1k views

HX711 Load cell providing constant large and negative reading

I'm currently working on a project that uses the HX711 load cell amplifier while connected to a series of strain gauges in a full bridge circuit. I'm using an Arduino Nano and have the CLK of the ...
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87 views

Mass Production Ultra-Low Current Calibration Methods

I'm attempting to design calibration for mass production on a newly designed product. The product is designed to use sub 1mA, so any digital calibration is unlikely. An example of this would be in ...
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232 views

Accelerometer - Offset correction

I'm using the MMA8453Q for motion detection. The accelerometer is mounted such a way that when it is stationary, X & Y axes are at 0g & Z-axis is at 1g. My usecase is: A tilt across any axes ...
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74 views

Tektronix TDS3000 series max trigger rate

So I am making a testing stand for some equipment and I am using an old TDS3034C Tektronix scope for most of my measuring purposes. I've connected it to the computer via Ethernet and using PyVisa to ...
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43 views

Old Fluke 23 service manual?

I'm looking for my old Fluke 23 service or calibration manual but all the Fluke 23 I find in a google search are the series II or series III. Mine is the oldest I guess, it has no series. Thanks. ...
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26 views

Centering joystick potentiometers in a controller

I've replaced a joystick in my Dual Shock 4 controller, because it was getting stuck. The readings of the new joystick are offset to right and down. I've read that you can recenter the readings by ...
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Is my magnetometer calibrated correctly?

I am calibrating the AK8963 on the MPU9250. The first plot shows original mag readings and the last plot shows readings corrected for soft and hard bias. I am following the guidance of Kris Winer: ...
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61 views

Magnetometer hard iron / soft iron calibration-compensation

I have real magnetometer data captured by BMX055. I deployed an hard-soft iron calibration code (magcal) on this data in Matlab. Here is the code: ...
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139 views

UDS vs XCP (Diagnostic)

When performing a calibration or a diagnosis acquisition from an ECU using a CAN-bus is there a protocol preferred? I've come across UDS and XCP but I can't quite get why one might be preferred over ...
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Correction factor for monitor based off orthogonal regression

I'm seeking some clarity about providing a correction factor for an instrument based off orthogonal regression. Currently I have a machine I built myself, co-located with a reference monitor recording ...
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474 views

Load cell continually increases or decreases

I am using a load cell that is wired to a HX711 amp in the following manner: . I have been attempting to use the calibration example code that is included in the HX711_ADC library (code listed bellow)...
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34 views

ESC motor calibrated, but still beeping and not responding

I am using this motor called abcGoodefg RC 2200Kv brushless motor. At first, when we followed the sample code on this website, things went well. But when we changed 1000 and 2000 to 10 and 20, ...
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1answer
35 views

Creating a calibration table for a power sensor

I have been tasked with creating a calibration equation for a power sensor. I have taken data with a calibrated signal generator and have plotted the various frequencies. Now I need to understand the ...
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42 views

Question regarding GM Tubes Calibration Frequency

My friend has has been using GM Tubes for more than a decade now. He has been calibrating them once per year. But the calibration data reveals that his GM Tubes would have remained within allowed ...
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99 views

Calibrating FEETECH FR5311M Digital Servo

Hey everyone, I am owning this model feetch servo motor. I want to do the following:(with arduino uno) Read the initial position(angle) of the servo motor rotate the motor to desired position(angle) ...
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413 views

Calculating battery percentage after voltage drops

I would like to display a battery percentage based on the remaining charge in the battery. I do not know if there is a better way of doing it other than measuring the voltage across the batteries. ...
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1answer
384 views

How to calibrate ACS712 current sensor for a 3v3 MCU (Adafruit Feather M0 with LoRa module)?

This is my first question in Stack Exchange. I'm completely new to Electronics, but I hope my question is meaningful. I'm in the process of measuring voltages and currents in my off-grid solar PV ...
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634 views

How to correct/adjust floor temperature sensor resistance to account for calibration error?

I have a heating system with 10kohm floor temperature sensor cable connected to controller unit. The controller displays floor temperature around 7.0 degC higher than reality, the sensor is installed ...
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668 views

How this servomotor calibration is supposed to work at electrical level?

Here is the Wiring Diagram: I am trying to understand how this servo motor calibration process (see screenshot of BMW software) is supposed to work at electrical level. In particular: there is 2-pin ...
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37 views

Heathkit IP-27 bench PSU min. stays at 0.18V and there is a +0.1V for all the readings?

I've recently acquired a Heathkit IP-27 bench power supply. The supply itself works quite fine except that the minimum voltage it can be turned down to with the coarse adjustment is only 0.18V, doesn'...
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3answers
218 views

Automotive accelerometer calibration

I would like to design a device which measures acceleration, yaw, pitch and roll for motorsport/automotive application. I plan on using an analog accelerometer, to provide better bandwidth and low ...
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3k views

How to avoid noise in YHDC SCT-013-000 current transformer?

I have a SCT-013-000 current transformer which I have connected to Arduino Uno with a burden resistor of 33 ohms and the calibration value I am using is 60. The problem is we are getting current ...
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332 views

Capacitor matching by capacitance multiplier

I am developing an analog fully differential circuit that needs a tight capacitor matching to reach high performances. Because discrete capacitors are difficult (and expensive) to match for production ...
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1answer
25 views

How to calibrate any magnetometer when sensor is changing the location?

I found magnetometer calibration is done for soft/hard distortions also for tilt compensation using gyro data as well, but all of them perform for know step of the procedure (rotating aligned with ...
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2answers
571 views

Innova 3320 multimeter calibration

Anyone have experience adjusting the Voltage reading on these? My less expensive meters have a single pot for calibrating, but this one has three. Labeled on the circuit board as V1, V2, and V3. I'd ...