A. Product Overview

The Metrix Plus 171TRMS Plus Digital Multimeter is a multifunction handheld electrical testing instrument designed for technicians who require accurate measurement of common electrical and electronic parameters.

Its 6000 count True RMS display and wide measurement capability make it suitable for everyday electrical troubleshooting as well as professional industrial maintenance.

Main Measurement Functions

• DC voltage up to 1000V
• AC voltage True RMS up to 1000V
• DC current up to 20A
• AC current True RMS up to 20A
• Resistance up to 60 MΩ
• Capacitance up to 100 mF
• Temperature from minus 50°C to 1000°C
• Frequency from 10 Hz to 10 MHz
• Duty ratio from 1 percent to 99 percent
• Diode testing
• Continuity testing
• Non contact voltage detection 

Key Features

• 6000 count digital display
• True RMS AC voltage and current measurement
• Automatic ranging
• Microamp, milliamp and amp current ranges
• Large backlit LCD
• Non contact voltage detection with buzzer
• Maximum and minimum measurement
• Relative measurement mode
• Data hold function
• Low battery indication
• Polarity indication
• Automatic power off
• Overload protection
• IEC 61010 safety compliance
• CAT III 1000V safety rating
• Portable handheld construction

These features make the meter suitable for electricians, service technicians, maintenance engineers and electrical troubleshooting professionals. 

B. Working Principle

A digital multimeter converts the electrical quantity being measured into an electrical signal that can be processed and displayed digitally.

Different internal circuits are used depending on whether the meter is measuring voltage, current, resistance, capacitance, frequency or another parameter.

Voltage Measurement

When measuring voltage, the meter is connected across the circuit or component.

Internal voltage divider circuitry reduces the incoming electrical signal to a level that can be processed safely by the meter's measuring electronics.

The Metrix Plus 171TRMS Plus can measure both AC and DC voltage up to 1000V. 

Current Measurement

During current measurement, the electrical current passes through an internal calibrated shunt resistance.

The meter measures the voltage developed across the shunt and calculates the corresponding current.

The 171TRMS Plus supports AC and DC current measurement from microamp ranges up to 20A. 

Resistance Measurement

For resistance testing, the multimeter applies a small internal electrical test signal through the component and calculates resistance from the resulting response.

The meter supports resistance measurements up to 60 MΩ. 

Capacitance Measurement

The capacitance function evaluates the charging characteristics of a capacitor and calculates its capacitance value.

The Metrix Plus 171TRMS Plus supports capacitance measurement up to 100 mF. 

Frequency Measurement

The meter counts the number of repetitive electrical signal cycles occurring during a defined time period.

Its specified frequency measurement range extends from 10 Hz to 10 MHz. 

Temperature Measurement

Using the supplied temperature probe, the multimeter converts the probe signal into a temperature reading.

The specified temperature range extends from minus 50°C to 1000°C. 

True RMS Measurement

The True RMS function calculates the effective value of an alternating electrical waveform.

This is especially useful when working with distorted or non sinusoidal AC signals that can occur in modern electronic equipment, variable speed drives, power supplies and industrial electrical systems.

C. Why Is the Metrix Plus 171TRMS Plus Used?

1. Electrical Troubleshooting

The meter can help technicians diagnose electrical faults by measuring voltage, current, resistance and continuity.

2. Industrial Maintenance

Maintenance teams can use the multimeter for checking control panels, machines, electrical circuits and industrial equipment.

3. AC and DC Voltage Measurement

The instrument measures AC and DC voltage up to 1000V, making it suitable for a wide range of electrical testing applications.

4. AC and DC Current Measurement

Current ranges extend from microamps to 20A, supporting both lower current electronics work and higher current electrical measurements within the instrument's rated limits.

5. Non Contact Voltage Detection

The built in NCV function detects nearby AC electric fields and provides buzzer indication.

This provides a convenient preliminary method for identifying the possible presence of energized conductors. 

6. Resistance Testing

Resistance measurement is useful when checking resistors, wiring, connections and electrical components.

7. Capacitor Testing

The capacitance function helps technicians verify capacitor values during electrical and electronics troubleshooting.

8. Temperature Measurement

Temperature measurement is useful when inspecting heating equipment, electrical components, HVAC systems and equipment where temperature is an important diagnostic parameter.

9. Frequency Testing

Frequency measurement can be used when checking signals and electrical systems operating at known frequencies.

10. Duty Ratio Measurement

Duty ratio measurement is useful when analysing repetitive pulsed electrical signals.

11. Diode Testing

The dedicated diode function can be used to check semiconductor diode forward voltage characteristics.

12. Continuity Testing

The continuity buzzer helps technicians quickly identify complete or open electrical paths.

13. True RMS Electrical Testing

True RMS measurement makes the 171TRMS Plus particularly useful for modern electrical systems where AC waveforms may not be perfectly sinusoidal.

14. Maximum and Minimum Monitoring

Maximum and minimum functions can help technicians identify the highest and lowest values recorded while performing measurements.

D. Suitable Buyers

The Metrix Plus 171TRMS Plus True RMS Digital Multimeter is suitable for:

• Electricians
• Electrical engineers
• Electronics engineers
• Electrical maintenance technicians
• Industrial maintenance teams
• Electrical contractors
• Automation engineers
• Control panel technicians
• Machine maintenance engineers
• HVAC technicians
• Facility maintenance teams
• Electrical service companies
• Electronics repair technicians
• Manufacturing plants
• Electrical commissioning engineers
• Preventive maintenance contractors
• Research laboratories
• Engineering laboratories
• Technical institutes
• Electrical testing professionals
• Solar installation technicians
• Industrial service engineers

It is especially suitable for professionals who require a True RMS 1000V digital multimeter with 20A current measurement, NCV, capacitance, temperature and frequency functions.

Frequently Asked Questions

1. What is the Metrix Plus 171TRMS Plus?

The Metrix Plus 171TRMS Plus is a 6000 count True RMS digital multimeter designed for professional electrical testing, maintenance and troubleshooting. 

2. Is the 171TRMS Plus a True RMS multimeter?

Yes. Both AC voltage and AC current measurements use True RMS measurement. 

3. What is the maximum DC voltage range?

The maximum DC voltage range is 1000V. 

4. What is the maximum AC voltage range?

The maximum AC voltage range is 1000V True RMS.

5. What is the maximum current measurement?

The instrument supports AC and DC current measurement up to 20A. 

6. What does 6000 count mean?

A 6000 count multimeter can display measurement values up to approximately 5999 before moving to the next measurement range. Higher count capability provides greater numerical resolution within supported ranges.

7. Is the Metrix Plus 171TRMS Plus auto ranging?

Yes. The instrument supports automatic ranging. 

8. Does it measure resistance?

Yes. Resistance measurement is supported up to 60 MΩ. 

9. Does the meter measure capacitance?

Yes. It measures capacitance from the nanofarad range up to 100 mF. 

10. Can it measure temperature?

Yes. Temperature measurement is supported from approximately minus 50°C to 1000°C using the appropriate probe. 

11. What is the frequency range?

The specified frequency measurement range is 10 Hz to 10 MHz. 

12. Does it measure duty ratio?

Yes. The specified duty ratio range is 1 percent to 99 percent. 

13. Does the 171TRMS Plus have NCV?

Yes. The instrument includes non contact voltage detection with buzzer indication. 

14. What is NCV?

NCV stands for Non Contact Voltage detection. It allows the meter to detect the electric field around an energized AC conductor without making a conventional direct voltage measurement.