Tools & Products

Multimeters

Choose by measurement category, environment, functions, and serviceability.

Choose a meter for the highest-energy environment and measurement method you are qualified and authorized to use—not by display count or feature list. The instrument, probes, accessories, fuses, and procedure must work as one rated system.

Selection starts with: Measurement category, working voltage, available energy, and task
Complete system: Meter, leads, probes, adapters, fuses, and PPE/procedure
Before and after: Inspect and prove operation using the approved method

1. Define the measurement environment

List the circuits you will actually test: electronics, receptacles, utilization equipment, panels, feeders, service equipment, motors, controls, or DC systems.
Record nominal voltage, possible transient exposure, fault-current environment, indoor/outdoor conditions, frequency, waveform, and whether energized access is permitted.
Match both the measurement category and voltage rating to the point of connection; a high maximum-voltage marking alone does not establish suitability.
Choose a safer method—fixed indicators, remote sensors, fused adapters, current clamps, or de-energized testing—when it can reduce exposure.

2. Match functions to the work

General electrical service benefits from clear controls, true-RMS AC measurement, continuity, resistance, capacitance, and a readable display.
Motor and drive work may need inrush, frequency, low-pass filtering, min/max capture, and manufacturer guidance about non-sinusoidal waveforms.
Controls and process work may need DC millivolts, 4–20 mA measurement or sourcing, frequency, duty cycle, logging, and high resolution at low levels.
DC power and solar work require suitable DC voltage/current ranges, polarity indication, accessories, and ratings for the actual system and transient environment.

3. Evaluate protection and construction

Look for credible independent certification to the applicable safety standard and confirm markings are on the exact model, not merely in advertising.
Verify current inputs use the specified high-energy fuses and that replacement fuses are available; never substitute an ordinary fuse.
Inspect jack spacing, shutters or input alerts, enclosure, battery compartment, lead strain relief, probe guards, finger barriers, and accessory ratings.
Ensure leads, clamps, adapters, and probes meet or exceed the meter’s intended environment; the lowest-rated component limits the measurement setup.

4. Use a repeatable pre-test method

Inspect the case, display, jacks, leads, probe insulation, barriers, fuse status, battery condition, and selector operation before use.
Confirm the leads are in the correct jacks and the function/range is appropriate before approaching the circuit.
Prove the complete setup on a known source using the employer’s approved live-dead-live or equivalent method when verifying an electrically safe work condition.
Re-prove the instrument after the test as required by the procedure; a blank display or zero reading alone is not proof of absence of voltage.

5. Compare usability and ownership

Check whether controls can be operated with required gloves, readings remain visible at the working angle, and probes can make stable contact without excessive exposed metal.
Consider calibration and repair service, fuse and lead cost, warranty, battery access, firmware/software support, data export, and traceability requirements.
Use protective storage that keeps the instrument dry and separates delicate leads from sharp tools and conductive debris.
Retire damaged or contaminated equipment according to the manufacturer or employer process rather than repairing safety barriers informally.

Common failure patterns

Buying by counts, accuracy, or extra functions while ignoring category, voltage, input protection, and the work environment.
Moving from a low-energy control circuit into distribution equipment with the same unrated probes or adapters.
Leaving a lead in the current jack and then attempting a voltage measurement.
Replacing a ruptured high-energy fuse with the wrong construction or rating.
Using resistance, continuity, capacitance, or current modes on an energized circuit when the instrument procedure does not permit it.
Treating a non-contact indication—or lack of one—as the sole proof of circuit condition.

Worked field example

Selection example: one meter for controls and 480 V motor troubleshooting

List both environments and establish the required measurement category, voltage rating, waveform capability, and authorized work methods for the higher-energy location.
Confirm true-RMS performance, low-pass or drive-specific guidance, min/max or inrush needs, and the low-level DC functions required for controls.
Verify the exact meter’s independent certification, input-fuse type, leads, probes, clamps, and adapters as a complete system.
Handle the instrument with required gloves and leads in a realistic mock setup before purchase.
Define inspection, proving, calibration, fuse replacement, storage, and retirement procedures.

What this proves: The best meter is the one that safely covers the authorized measurement environments and produces repeatable evidence. Extra functions do not compensate for an unsuitable rating or weak test method.

Verify before use

Official sources

Source set reviewed September 2026. Recheck the current adopted requirements before design, purchase, permit, or installation.

IEC 61010-2-030 — Testing and measuring circuits ↗
Official IEC scope for safety requirements applying to external testing and measuring circuits.
IEC 61010-031 — Hand-held probe assemblies ↗
Official IEC safety requirements for hand-held probes and related accessories.