# Tagged Questions

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### How to calibrate an optical particle sensor (Mie scattering)

I have a very simple sensor that basically emits infrared light (1 micron wavelength in the infrared range). The light scatters off particles whose diameter is of the same order of magnitude as the ...
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### How to calculate a correction factor for two sensors

Suppose one has two sensors placed in the same environment (thus should be reading the same environmental data). But not being perfect instruments, there is a discrepancy between the two sets of ...
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### Where can I send my 0.005% 1 PPM tempco calibration resistors to find out their “true” value?

edit: putting this at the top because people keep answering questions I didn't ask: Where can I get this done cheaply by a place that is hobbyist friendly? I don't even know where to look. I imagine ...
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### PIC18F26K80 ADC calibration using Bandgap

The PIC18F26K80 errata sheet mentions that the ADC has an offset error as high as 25 bits and discusses one workaround copied from the errata here: A/D Offset The A/D may have high offset error, up ...
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### What Ways to Calibrate a Multimeter?

How can one calibrate a multimeter, like a UT61E or any other multimeter in the 50 ~200 \$ pricemark, when one does NOT have an expensive FLUKE nor a friend who has a FLUKE)
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### 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 ...
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### 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 ...
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### Does calibration involve fixing electronics or mechanical part?

My question is not 100% related to electronics design but it might be because I don't know the answer. I'm writing a simple research on anemometer calibration. The thing is all the resources I found ...
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### Calibration Resistor? [closed]

I am building a stir plate for an erlenmeyer flask and in the schematic it shows a calibration resistor between the "power in" and the "power out" terminal on the potentiometer. I am just curious as ...
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### Torque measurement device calibration

I don't know if I'm at the right place to ask this question but here is my trouble : I'm trying to find a good way of calibrating a electronic device used to measure small torques (0 -> 25 mNm). ...
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### How often should I have to set oscilloscope probe's capacitance?

I got a new Owon SDS7102 oscilloscope and I'm using the included oscilloscope probes with it. The manual says that the proper calibration procedure is to let the oscilloscope work at constant ...
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### industrial water quality sensor, with analog 4-20 ma output. slope and zero point values?

Hello I have an industrial water quality sensor that measures chlorine. the sensor has an analog output of current (classic 4-20mA). The sensor is already calibrated and shows the right value of ...
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### 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 ...
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### 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 ...
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### 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 ...
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### 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 ...
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### 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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### 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 ...