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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3answers
5k views

How do you Calibrate 32.768kHz crystal for PIC24 RTCC

I'm trying to figure out the best method for PIC24 RTCC crystal calibration. Their application note states two methods: using a lookup table and using a reference system clock. According to them the ...
7
votes
4answers
19k views

How to calibrate a temperature sensor

I am using an LM35 temperature sensor, which produces an output of 10.0 mV/°C. My circuit will handle temperatures up to around 90C What can I do to check the LM35 output, and maybe fine tune it for ...
16
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1answer
8k views

Magnetometer ∞ shaped calibration

In mobile phones and other devices using a 3-axis electronic compass, a ∞/8/S shaped movement is used to calibrate the magnetometer as shown in these videos. Why is this movement performed, what is ...
7
votes
2answers
684 views

Best way to calibrate ADC for current sense MOSFET

I'm using the infinion BTS6143 as a current switch and current measurement device in combination with an STM32 controller. The BTS6143 is an integrated MOSFET with internal charge pump and \$I_{sense}...
19
votes
2answers
6k views

Magnetometer dynamic calibration

I am working on a Magnetometer AK8975 being a part of an IMU. Which seems to be very tricky for me. This chip gives a 3D vector as output describing earth's magnetic field at any place on earth or ...
10
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2answers
3k views

How to calibrate multimeters?

Without buying an expensive calibration tool, how can I accurately calibrate my multimeters?
4
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2answers
2k views

Network Analyzer HP 8752A Calibration

How can I do a two-port response calibration to measure S-parameters (Reflection and Transmission) for an HP 8752A Network Analyzer? The DUT (two coils, one in air and one in salt-water) is ...
0
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5answers
8k views

Need help calibrating ADC input using a voltage divider

I have been using Arduino Nano analog input to measure voltages, in the range between 22-30 Volts. The Nano's ADC expects a 0-5 volt range and has 0-1023 as its output. Following the instructions ...
9
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4answers
2k views

How viable is it to just use 1% resistors and calibrate out the error?

At the moment, I use 0.1% resistors to get accurate voltage measurement through a voltage divider. However, the cost is high, so I was thinking of using 0.5% or 1% resistors and calibrating out the ...
3
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1answer
1k views

How can I calibrate my sound card based oscilloscope?

I'm using Soundcard Oscilloscope software that presents as below You'll notice that the display has a grid, and in the example is set for 100mV/div. Since it's using the sound card integral to my ...
2
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2answers
89 views

Calibrating DAQs

I'm using some of National Instruments' DAQs for some measurements, but their calibration is slightly off. To work around this I am hoping to factor in any imperfections into the measurements such ...
2
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2answers
3k views

Confusing oscilloscope calibration signal

EDIT: See last paragraph I recently got a cheap 2-channel oscilloscope (Hitachi V-212). Judging from the "calibration not required" sticker on the front, it's been beaten up and/or neglegted (by the ...
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2answers
267 views

Calibration of reading of current measuring cicuit

Ok ,I'm making a small current meter device I was able to take the voltage coming from a "shunt resistance " which is a current transducer that gives me an specific analog signal that proportional to ...
0
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1answer
3k views

What is the maximum force that a FSR sensor can detect?

Force Sensitive Resistor (FSR) is a sensor which lowers its resistance when there is force upon it. If there is no force acting on it, the resistance is ~10MOhms. In the datasheet of FSR A401 of ...