Voltmeters

Voltmeters, also known as voltage meters, are instruments used to measure the electric potential difference (voltage) between two points in an electrical circuit. This measurement is typically displayed on a numeric display, which can be an analogue needle or a digital readout. These tools are widely used in New Zealand by electricians and technicians to determine voltage levels at various points, ensuring systems operate within safe parameters.

The importance of a voltmeter extends beyond simple measurement, especially since these devices are crucial for safety, troubleshooting, and maintenance. They can be portable for on-the-go use or integrated into larger equipment for continuous monitoring. Available with specific voltage ranges or adjustable settings, a voltage meter is a fundamental tool for anyone working with electrical and electronic systems.

Types of Voltmeters

In New Zealand, you’ll find voltmeters in various types, including:

Digital Voltmeters (DVM)

Digital voltmeters provide voltage measurements in a numeric form on a digital display. They use analogue-to-digital converters (ADC) to convert the input voltage into a digital signal, which is then processed and displayed. DVMs offer higher accuracy, precision, and resolution compared to analogue voltmeters. They may also include additional features such as auto-ranging and data logging.

Analogue Voltmeters

Analogue voltmeters have a pointer or needle that moves across a scale to indicate the measured voltage. They typically use a moving coil or moving iron mechanism to convert the electrical signal into mechanical motion. Analogue voltmeters are simple and reliable but may have limitations in terms of accuracy and precision.

Moving Coil Voltmeters

Moving coil voltmeters are either permanent magnets or dynamometers as measuring components with low power consumption benefits. Moving iron voltmeters can measure both AC and DC currents by producing a deflective torque. The torque-to-weight ratio is high, which means increased accuracy of readings.

Electrostatic Voltmeters

Electrostatic voltmeters measure current flow based on attraction, repulsion or symmetry between two electrically charged plates. Their benefits are the high voltage range capacity of 200KV.

Key Features and Benefits of Voltage Meters

Accurate Voltage Measurement: Digital and analogue voltmeters provide accurate and precise voltage measurements, allowing for precise analysis and troubleshooting of electrical systems.
Easy-to-Read Displays: Most voltmeters have clear and easy-to-read displays, whether analogue or digital, making it convenient to interpret the measured voltage values.
Versatility: Voltmeters can measure voltage in various electrical systems and circuits, making them versatile instruments suitable for a wide range of applications.
Safety Assurance: Like non-contact voltage meters, voltmeters also play a crucial role in ensuring safety by allowing technicians and electricians to verify the absence of voltage before performing maintenance or repairs.
Troubleshooting and Maintenance: Voltmeters are essential tools for troubleshooting electrical issues. By measuring voltage levels at different points in a circuit, technicians can pinpoint the source of problems and take corrective actions.
Calibration and Verification: Voltmeters are used for calibrating and verifying the accuracy of other measuring instruments, ensuring consistent and reliable measurements across the entire electrical measurement system.
Data Analysis and Monitoring: Voltmeters can be used to monitor voltage levels over time, enabling data analysis and trend monitoring.

Applications of Voltmeters

From industrial applications to everyday use, here are some key areas where voltmeters are essential:

Industrial Machinery: A voltmeter is critical for monitoring the performance and safety of industrial motors, pumps, and conveyor systems. It helps technicians ensure that equipment is receiving the correct voltage and can detect potential issues before they cause costly damage or downtime.
Laboratory Settings: In laboratories, a digital voltmeter provides the high precision and accuracy needed for scientific experiments, research, and testing. It's also a standard tool for measuring tiny voltages in delicate circuits and for calibrating other measuring instruments.
Power Generation and Distribution: Voltmeters are used in power plants and substations to monitor and control voltage levels, ensuring a stable and reliable power supply for homes and businesses.
HVAC Systems: Technicians use a voltage meter to diagnose and troubleshoot electrical problems in heating, ventilation, and air conditioning systems, from checking compressors to verifying control circuit functionality.
Automotive Diagnostics: A portable voltmeter is an indispensable tool for mechanics to check battery health, alternator output, and diagnose electrical faults in a vehicle's wiring and electronic systems.
Consumer Electronics: In electronics repair, a volt meter is used to check voltage levels on circuit boards and components, helping technicians pinpoint faults and bring devices back to life. It's also used by DIY enthusiasts for personal projects.

Order High-Quality Voltmeters for Safe Testing

RS New Zealand is your trusted supplier and distributor of high-quality voltmeters from leading brands like Lascar, Murata Power Solutions, and Sifam Tinsley. In addition to our wide range of voltage meter devices, you can also turn to us for other essential test and measurement devices, such as PAT machines and multifunction testers.

With competitive prices, RS New Zealand is your go-to source for reliable test and measurement solutions. We offer a variety of digital voltmeters and analogue models, ensuring you have the right equipment for accurate and safe electrical work. Browse our extensive selection of voltmeters today and find the perfect tool for your needs.

When you order from RS New Zealand, you can also expect fast and reliable delivery of all voltmeters and electrical test equipment across the country. For more details on our full range of delivery services, including timings and fees, please refer to our dedicated Delivery page.