Frequency Data Wavelength-frequency Conversion

Fig. 1 permits conversion between frequency and wavelength. The f scale may be multiplied by a power of 10 if the  scale is divided by the same power of 10

Wavelength-frequency convers...

Circuit to improve the loading-induced nonlinearity in a potentiometer

circuit 04

A simple way to reduce the loading error, without r...

Relative and absolute error for the circuit as a function of wiper position and the factor K

Equation (3.13) shows the dependence of the maximal relative error on k. Because in (3.10) x and 1 — x can be interchanged with no effect, we conclude that the relative error is symm...

Signal conditioning for resistive sensors

Figure 3.4 is variation of the measured voltage of a potentiometer as a function of wiper position, for different values for k. This means that the input resistance of the voltage measurin...

Simple signal conditioning for a potentiometer

Figure 3.3a shows the simplest signal conditioning for a potentiometer having a nominal resistance R. The linear or rotary movement from the device to be mea...

Two-readings method for resistance measurement: First the drop in voltage across a known resistor is measured and then across the unknown resistor

Figure 3.1. It consists of placing a known stable resistor in series with the unknown one. First a reading is taken across that resistor and then another reading across the unknown one. Afterward t...

Linear behavior when connected as voltage divider

A temperature in the range from 30°C to 40°C is to be recorded using a recorder that accepts a full-scale voltage of 100 mV. The probe chosen is based on linearized thermistors for which ma...

Resistive humidity sensor based on a chemically treated plastic

Some of the materials used are aqueous solutions of hygroscopic salts (LiCI, BaF2, P,05) deposited in a zigzag pattern between two electrodes on a plastic substrate. There are also probes where no ...

Resistance-humidity characteristic for the sensor PCRC-l I

Figure 2.25, it is nearly exponential and ranges over four decades. The resistance must be measured with ac current having no dc component. The time constant (change to 63% of a step-change input) ...

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