Step-by-step guides for testing batteries, fuses, outlets, relays and more.
As an Amazon Associate we earn from qualifying purchases. How to choose a multimeter for checking oxygen sensors comes down to three features: a DC voltage range fine enough to show a sensor swing of about 1 volt, an input resistance high enough that the meter does not pull on the signal, and an ohms…
As an Amazon Associate we earn from qualifying purchases. How to choose a multimeter for checking capacitors comes down to four things on the listing: whether the meter has a capacitance function, the range that function covers, the display resolution, and the CAT rating. This guide covers low-voltage bench checks on capacitors that are out…
As an Amazon Associate we earn from qualifying purchases. Learning how to choose a multimeter for checking relays comes down to three things: an ohms range that reads a relay coil, a continuity beep that shows whether the switch contacts close, and a CAT rating that suits the circuit you work on. The checks described…
As an Amazon Associate we earn from qualifying purchases. How to choose a multimeter for measuring inductance comes down to one check first: does the meter have an inductance (L) mode, and does its range cover the value you expect? Most handheld multimeters are not described as inductance meters, and the sources we opened say…
As an Amazon Associate we earn from qualifying purchases. How to choose a multimeter for measuring hFE starts with two checks: whether the meter has a transistor socket, and whether its manual states the test condition behind the number it shows. Some digital multimeters include an hFE socket, and the reading it gives is an…
As an Amazon Associate we earn from qualifying purchases. How to choose a multimeter with a flashlight starts with one check: confirm that the listing or manual actually states a light, then check whether that light is built into the meter or sold as a separate tool. Some meters in the sources have a built-in…
As an Amazon Associate we earn from qualifying purchases. How to choose a multimeter with a magnetic base starts with one question: will the meter stay on a steel surface while you work? A magnetic base lets you attach the meter to ferromagnetic metal, so you can read the display at eye level while both…
As an Amazon Associate we earn from qualifying purchases. How to choose a multimeter for cold weather starts with one number: the operating temperature range printed in the listing or the manufacturer’s manual. Storage limits are wider and do not show whether the meter will read accurately in an unheated garage or a cold vehicle….
As an Amazon Associate we earn from qualifying purchases. How to choose a multimeter for thermocouple testing comes down to three checks: a DC millivolt range, a temperature input or function that suits the probe you will use, and a stated CAT rating that matches the circuit you work on. A thermocouple makes a very…
As an Amazon Associate we earn from qualifying purchases. How to choose a multimeter for 4 to 20 mA loops comes down to two questions: can the meter read direct current in the milliamp range, and can it show you whether the loop is healthy? A 4 to 20 mA loop carries a current that…