Articles Measurement - 3

For most applications, current measurements are made by sensing the voltage drop across a resistor. There are two locations in a circuit that resistors are commonly placed for current measurements. The first location is between the power supply and ...

Using a PN-junction diode for temperature measurement usually depends on its 2 mV/K temperature coefficient. Conventionally, you must amplify and digitize this voltage with an ADC before you can use the value in a microcontroller. Less well-known ...

In multiple-output power supplies in which a single supply powers circuitry of vastly different current draws, two perplexing steps are sensing the current that each output draws and deactivating the power supply in the event of an overload on that ...

The more linear the sensor’s output, the easier it is to calibrate and to minimize uncertainty in output scaling Most analog output sensors have general specifications such as linearity (or non-linearity), repeatability, and resolution, as ...

What is Air Pollution? Air pollution is the presence of excessive amount of unwanted harmful solid and gases substances in the air. Cause and Effect of Air Pollution Recently, many cities in the world have encountered rapid urbanization and this ...

Part 1 The safety shield surrounds the electrostatic shield, protecting the instrument user from hazardous voltages on the DUT, or the measurement leads. The safety shield should be connected to earth ground at the instrument, and it should have a ...

Inadequate shielding and bad grounding are often blamed when measurements are inaccurate, especially in high-impedance applications. In fact, shielding and grounding problems are frequently responsible for measurement errors, but many test system ...

Editor’s note: Jim McLucas, author of the Design Idea Circuit measures capacitance or inductance wanted to respond to some discussion about using this Design Idea. Please see the following that may help. This is an analysis of the effect of ...

Engineers usually have access to signal and function generators, as well as frequency counters and oscilloscopes, but they may not have access to capacitance or inductance meters. Using the test setup in Figure 1, you can measure capacitance or ...

ISFETs and MEMFETs (ion-sensitive and membrane FETs) are solid-state chemical sensors that provide an electrical signal associated with the change of a chemical concentration in a solution. These types of sensors need a stable operating point. A ...