Metravi 19-SUPER Digital TRMS Multimeter

A. Product Overview

The Metravi 19-SUPER is a 3 5/6-digit True RMS digital multimeter built for accurate and convenient electrical testing. Its True RMS measurement capability helps provide dependable AC readings, including measurements on non-sinusoidal electrical signals commonly found in modern electronic equipment, variable-speed systems and switched power supplies.

The multimeter features a large 6000-count LCD, automatic range selection, automatic polarity indication, data hold, relative measurement and an over-range indication. It has a sampling rate of approximately two to three readings per second.

Major measuring functions include:

• AC voltage up to 1000 V
• DC voltage up to 1000 V
• AC current up to 20 A
• DC current up to 20 A
• Resistance up to 60 MΩ
• Capacitance up to 60 mF
• Frequency up to 9.999 MHz
• Duty ratio from 0.1 percent to 99.9 percent
• Temperature from minus 40°C to 1000°C with a suitable K-type thermocouple
• Continuity testing
• Diode testing
• Transistor hFE testing
• Non-contact voltage detection

The supplied accessories include a user manual, a pair of test leads and a K-type thermocouple. The supplied thermocouple is specified for temperature measurements below 230°C, although the meter supports a wider temperature range when used with a suitable compatible probe.

B. Working Principle

The Metravi 19-SUPER works by receiving an electrical signal through its test leads or an appropriate temperature probe. Its internal electronic measuring circuit processes the signal, converts it into a digital value and displays the result on the LCD.

For voltage measurements, the test leads are connected across the electrical source or component. For current measurements, the multimeter is connected in series with the circuit so that the current passes through the meter.

For resistance, capacitance, diode and continuity testing, the multimeter applies a small internal test signal to the component and evaluates its electrical response. During continuity testing, the built-in buzzer sounds when the measured resistance is approximately 10 Ω or lower.

In True RMS mode, the multimeter calculates the effective value of an AC waveform rather than estimating it from its average value. This helps improve measurement reliability when testing irregular or distorted AC signals.

The non-contact voltage function detects the presence of an alternating electric field without requiring direct metal-to-metal contact with the conductor. Temperature is measured by connecting a K-type thermocouple, which generates a small voltage corresponding to the sensed temperature.

C. Why It Is Used

The Metravi 19-SUPER Digital TRMS Multimeter is used for testing, troubleshooting, installation and preventive maintenance of electrical and electronic equipment.

It can help users:

• Measure AC and DC supply voltage
• Check electrical current consumption
• Test resistors and electrical resistance
• Identify open circuits and poor connections
• Check diodes and transistor amplification
• Measure capacitor values
• Measure signal frequency and duty ratio
• Monitor temperature using a K-type thermocouple
• Detect the presence of AC voltage without direct contact
• Troubleshoot electrical panels, appliances and electronic circuits
• Perform routine maintenance on industrial and commercial equipment

The combination of True RMS measurement, automatic ranging and multiple testing functions allows technicians to carry one instrument for several common electrical and electronic measurements.

D. Suitable Buyers

The Metravi 19-SUPER is suitable for:

• Electrical technicians
• Electronics repair professionals
• Industrial maintenance engineers
• Control-panel manufacturers
• Automation and instrumentation engineers
• HVAC and refrigeration technicians
• Electricians and electrical contractors
• Facility maintenance departments
• Equipment service centres
• Laboratory technicians
• Technical training institutes
• Engineering students
• Appliance repair professionals
• Machinery maintenance teams
• Electrical testing and commissioning companies

Frequently Asked Questions

1. What is the Metravi 19-SUPER Digital TRMS Multimeter?

The Metravi 19-SUPER is a 6000-count, auto-ranging True RMS digital multimeter used to measure electrical and electronic parameters such as voltage, current, resistance, capacitance, frequency, duty ratio and temperature.

2. What does True RMS mean?

True RMS refers to a method of calculating the effective value of an AC waveform. It provides more reliable readings than average-responding meters when measuring distorted or non-sinusoidal AC signals.

3. What is the maximum voltage measurement range?

The Metravi 19-SUPER can measure AC and DC voltage up to 1000 V.

4. What is the maximum current measurement range?

The meter provides AC and DC current ranges up to 20 A. The catalogue states that current up to 10 A can be measured continuously, so the applicable operating instructions and measurement-duration limits should be followed for higher-current testing.

5. Does the Metravi 19-SUPER support automatic range selection?

Yes. It is an auto-ranging multimeter that automatically selects an appropriate measurement range for many supported functions.

6. Can it measure temperature?

Yes. It supports temperature measurement from minus 40°C to 1000°C and from minus 40°F to 1832°F with an appropriate K-type thermocouple. The K-type thermocouple supplied with the meter is intended for measurements below 230°C or 446°F.

7. Does it have non-contact voltage detection?

Yes. The built-in NCV function can detect the presence of AC voltage without requiring direct contact with a live conductor.

8. Can it measure capacitance?

Yes. The meter supports capacitance measurements from 6 nF up to 60 mF, depending on the selected range.

9. Can it measure frequency?

Yes. It supports frequency measurements from approximately 9.999 Hz up to 9.999 MHz.

10. Does it have a continuity buzzer?

Yes. The meter includes an audible continuity function. According to the catalogue, the buzzer sounds continuously when the measured resistance is approximately 10 Ω or lower.

11. Can it test diodes and transistors?

Yes. It includes diode testing and transistor hFE testing functions.

12. What is the display count of this multimeter?

The meter has a 6000-count LCD. Its capacitance display supports up to 6200 counts, while its frequency display supports up to 9999 counts.

13. Does it include data hold?

Yes. The data-hold function freezes the displayed reading so that it can be recorded or reviewed conveniently.

14. What accessories are supplied with the meter?

The standard accessories listed in the catalogue are a user manual, a pair of test leads and a K-type thermocouple.

15. What battery does the Metravi 19-SUPER use?

It operates using one 6F22 9 V battery and includes a low-battery indication on the LCD.

16. Is the Metravi 19-SUPER suitable for industrial maintenance?

Yes. Its True RMS measurement, wide electrical ranges, temperature input, NCV detection and component-testing functions make it suitable for many industrial maintenance and troubleshooting tasks.

17. What is the safety category of the multimeter?

The catalogue specifies CAT II 1000 V, Pollution Degree 2 and double-insulation safety construction. Users should always select a meter whose measurement category is appropriate for the circuit and installation being tested.