Voltage and Continuity Testers

Voltage and Continuity Testers

Voltage and Continuity Testers can be as simple as a small light or buzzer connected to a plastic housing, with a battery and the two test leads completing the circuit. If the circuit you are testing has a path for electricity to flow, then the light/buzzer will activate, letting you know that the circuit is good. Otherwise one can assume that there is a break or fault within the circuit you are testing.These devices can also specify what voltage you are in, not an exact measurement, like a multimeter but a common range, either 120 or 220, for example. These testers are much more prevalent in industrial applications where there are multiple voltage ranges in any area.

A continuity tester determines if an electrical circuit can be made between two points. There are two main types: solenoid testers and full-featured testers. Solenoid testers are the traditional model. Full-featured testers perform multiple functions and come with features that make the user’s job easier.

Continuity testers are used in residential, industrial, and commercial environments. They are used in a variety of applications, including electricians, cable TV and audio, alarm technicians, HVAC installers, auto repair technicians, and DIY homeowners.  They come in various styles and sizes to meet a range of needs.

Continuity Testers Applications

• Measure volts ac and volts dc
• Troubleshoot low-voltage lighting
• Detect live voltage even when the batteries are dead
• Test GFCI circuits
• Resistance measurement
• Check the rotation of electrical motors
• Check the proper set up of 3-phase systems
• New home wiring
• Multiple cable and wire identification
• Local and remote continuity
• Home theatre installation

Types of Continuity Testers

• Traditional solenoid tester. Solenoid testers are extremely durable and easy to use. However, they have their limitations. For instance, they don’t work on low-voltage circuits.
• Full-featured tester. These multi-meters are capable of testing and measuring multiple parameters and come with features, such as a built in flashlight, that make the user’s job easier.

Key Features of Continuity Testers to Consider

• Easy and accurate OpenJaw™ current measurement
• Continuity beeper
• 3 forms of ac/dc voltage indication: light, sound, and vibration for added user protection and convenience
• Detachable SlimReach™ probe tips are customized for national electrical standards
• CAT IV 600 V, CAT III 1000 V rated for added user protection
• Compliant with latest NFPA 70E recommendations
• Replaceable test probes for added flexibility and convenience
• Hazardous voltage warning light for added user protection
• Built-in flashlight

This video demonstrates Extech CT20 Remote & Local Continuity Tester and shows some of its many applications. It is just one of the continuity testers available.