Step-by-step guides for testing batteries, fuses, outlets, relays and more.
As an Amazon Associate we earn from qualifying purchases. What does counts mean on a multimeter? It is the highest number a digital display can reach before the meter moves to another range, so a 4000-count display runs from 0000 to 3999 on the range in use. Counts describe the display’s resolution, meaning the smallest…
As an Amazon Associate we earn from qualifying purchases. What is the difference between AC and DC voltage? DC voltage stays at a constant level over time, so its current flows in one direction, while AC voltage periodically reverses direction. That single difference changes how a multimeter is set up, how its reading is interpreted,…
As an Amazon Associate we earn from qualifying purchases. What is the difference between analog and digital multimeter designs? In short, an analog meter moves a needle across a fixed scale, while a digital meter converts the measurement into a number on a display. That one difference shapes the trade-offs: how fine a reading can…
As an Amazon Associate we earn from qualifying purchases. What does a multimeter measure? A digital multimeter measures voltage, current and resistance, which Fluke’s how-to guide lists as the basic functions. Many models also check continuity and diodes, and some add capacitance, frequency and temperature. Which functions a meter has depends on the model, so…
As an Amazon Associate we earn from qualifying purchases. How does a battery tester work? It puts the battery into a known condition and reads one result: the voltage at rest, the voltage while a load draws current, or the conductance of the battery’s internal path. Each method answers a different question, and none of…
As an Amazon Associate we earn from qualifying purchases. What is resistance tolerance? It is the largest allowed difference between a resistor’s marked value and its actual value, written as a percentage of that marked value. Tolerance belongs to the part and is set when it is made. A multimeter reading is a different thing,…
As an Amazon Associate we earn from qualifying purchases. What is a current shunt? It is a low-value resistor that a multimeter places in the current path when it measures current. The meter reads the small voltage that the current produces across the shunt and converts that reading into amps or milliamps. This explainer covers…
As an Amazon Associate we earn from qualifying purchases. What is a millivolt? A millivolt (mV) is one thousandth of a volt, so 1 mV equals 0.001 V. It is the same unit of voltage on a smaller scale, not a separate quantity. Meters show it on a dedicated millivolt range, and that range matters…
As an Amazon Associate we earn from qualifying purchases. What is accuracy on a multimeter? It is the largest error the maker allows between the displayed reading and the true value, under stated conditions. Makers usually write it as a percentage of the reading plus a number of counts, such as ±(0.5% + 2), or…
How to Test a Dryer Heating Element With a Multimeter As an Amazon Associate we earn from qualifying purchases. The person typing how to test a dryer heating element with a multimeter wants to know whether the heating element is the reason a dryer runs but does not heat, and whether it is worth buying…