Fluke 117 Review in 2027 [Electricians True RMS Multimeter]

Last Updated on October 10, 2026

The Fluke 117 Review begins with a simple question: is this multimeter worth buying if you regularly work with electrical systems? Whether you’re an electrician, maintenance technician, or experienced DIY user, having a reliable meter can make troubleshooting easier. The Fluke 117 is one of the professional models worth considering, especially when comparing digital multimeters for electrical work.

Part of Fluke’s 110 series, the 117 is designed with electricians in mind. It combines True RMS measurements, AutoVolt automatic AC/DC voltage selection, VoltAlert non-contact voltage detection, and a compact design that is convenient for everyday testing.

Unlike some basic digital multimeters, the Fluke 117 also includes a low-input-impedance measurement function that helps identify ghost voltage. This can be particularly useful when troubleshooting building wiring.

However, it’s not the right meter for every job. It lacks temperature measurement and some of the advanced functions found on industrial multimeters.

In this Fluke 117 Review 2027, we’ll examine its specifications, accuracy, features, real-world applications, advantages, and limitations. We’ll also compare it with several alternatives to help you decide whether it belongs in your toolbox.

Fluke 117 Multimeter: Key Features at a Glance

True RMS: Measures AC voltage and current accurately within its specified operating conditions, including many non-sinusoidal waveforms.
AutoVolt: Automatically selects AC or DC voltage measurement.
VoltAlert: Provides built-in non-contact AC voltage detection for preliminary checks.
LoZ Function: Helps reduce misleading readings caused by ghost voltage.
6,000-Count Display: Includes a bar graph and white LED backlight.
Current Measurement: Supports AC and DC current measurement up to 10A within the meter’s ratings.
Safety Rating: CAT III 600V under the manufacturer’s published specifications.
Battery: One 9V alkaline battery with approximately 400 hours of typical operation without the backlight.

The combination of AutoVolt, VoltAlert, and LoZ is one of the main reasons the Fluke 117 stands out from other general-purpose meters in the same price category.

Technical Specifications of the Fluke 117 Multimeter

Features	Fluke 117 Multimeter
Display:	6,000 counts; approximately 4 updates per second
Bar Graph:	33 segments
Maximum Voltage:	600V AC/DC
DC Voltage Accuracy:	±(0.5% of reading + 2 counts)
AC Voltage:	True RMS; 600V maximum
AC Voltage Accuracy:	Typically ±(1.0% + 3 counts) in the specified 45–500 Hz range
AutoVolt:	Automatic AC/DC voltage selection
Non-Contact Voltage Detection:	Built-in VoltAlert
Low Input Impedance:	AutoVolt LoZ function
Resistance:	Up to 40 MΩ
Capacitance:	Up to 9,999 µF displayed range, with accuracy dependent on range
Continuity:	Audible continuity detection
Diode Test:	Yes
AC Current:	Up to 10A True RMS
DC Current:	Up to 10A
Current Input Fuse:	11A, 1,000V fast-acting fuse specified by Fluke
Temperature Measurement:	No
Safety Rating:	CAT III 600V
Operating Temperature:	-10°C to +50°C
Storage Temperature:	-40°C to +60°C
Battery Type:	One 9V alkaline battery, IEC 6LR61
Battery Life:	Approximately 400 hours typical, without backlight
Warranty:	3 years, subject to the manufacturer’s terms
Product Listing:	Check Today’s Price

Note: Measurement accuracy depends on the selected function, range, frequency, and environmental conditions. The values above are a practical overview of the manufacturer’s specifications rather than a substitute for the complete user manual.

Now that we’ve covered the technical details, let’s look at how the Fluke 117 performs in everyday electrical work and where its features are most useful.

Electrician’s Multimeter Fluke 117 Review: Features and Performance

True RMS Accuracy for Modern Electrical Loads

True RMS is one of the most useful features of the Fluke 117.

Many electrical devices today use switching power supplies, electronic controls, and other components that can produce distorted AC waveforms.

A basic average-responding multimeter is usually calibrated for a sine wave. This means its readings may become less accurate when measuring certain non-sinusoidal signals.

The Fluke 117 uses True RMS technology to provide more representative measurements of AC voltage and current under the conditions specified by Fluke.

This is helpful when working around computers, lighting equipment, and many electronically controlled electrical loads.

However, True RMS doesn’t mean a meter can measure every waveform accurately. The signal must still fall within the instrument’s frequency range, crest-factor limits, and other specifications.

For example, variable-frequency drives can produce high-frequency switching components that require a meter with specialized filtering capabilities.

The Fluke 117 does not have the dedicated low-pass filter found on the Fluke 87V.

If you routinely troubleshoot motor drives or industrial equipment, our Fluke 87V industrial multimeter review covers a model better suited to those demanding measurements.

AutoVolt Automatic AC/DC Voltage Selection

One of the features that makes the Fluke 117 convenient is AutoVolt.

Instead of switching manually between AC and DC voltage settings for every measurement, AutoVolt automatically selects the appropriate type.

This can make routine troubleshooting quicker when moving between different electrical systems.

For example, an electrician checking a DC control supply and then an AC circuit may find automatic selection convenient.

However, AutoVolt has its own accuracy specifications, which differ from those of the dedicated AC and DC voltage functions.

For measurements where maximum accuracy matters, selecting the appropriate dedicated function may be preferable.

VoltAlert Non-Contact Voltage Detection

The Fluke 117 includes VoltAlert, a built-in non-contact voltage detection feature.

This allows you to make a preliminary check for the presence of AC voltage without immediately placing the test leads onto a conductor.

It can be useful when identifying potentially energized wiring or checking an area before beginning a more detailed examination.

However, VoltAlert should never be used as the only method to confirm that a circuit is de-energized.

Non-contact detectors can fail to indicate voltage because of shielding, conductor position, sensitivity, or other conditions.

For electrical safety, follow the appropriate isolation and lockout procedures, then verify the absence of voltage with a correctly rated contact-type instrument using an approved testing procedure.

This distinction is especially important when working on distribution panels or other hazardous circuits.

LoZ Function for Ghost Voltage

One feature that deserves more attention is the Fluke 117’s low-input-impedance function.

Ghost voltage can appear when a disconnected conductor runs close to energized wiring.

A high-input-impedance multimeter may show a voltage caused by capacitive coupling, even though the circuit cannot supply significant current.

The Fluke 117’s AutoVolt LoZ function places a lower impedance across the measurement points, helping reduce these misleading readings.

For electricians troubleshooting building wiring, this can save time when distinguishing induced voltage from a more substantial voltage source.

However, the LoZ function deliberately places an electrical load on the circuit. It should not be used indiscriminately on sensitive electronic systems or circuits that cannot tolerate the additional load.

Bright Backlit Display

Electrical work doesn’t always take place in well-lit areas.

Whether you’re inspecting a basement electrical panel or troubleshooting equipment inside a service enclosure, a clear display makes the job easier.

The Fluke 117 features a 6,000-count digital display with a white LED backlight.

It also includes an analog-style bar graph that provides a quick visual indication of changing measurements.

These features are useful when you’re trying to read measurements in awkward locations.

Rugged Construction and Safety Rating

The Fluke 117 has a compact, durable design intended for regular professional use.

Its published safety rating is CAT III 600V.

This rating relates to the electrical environments and transient overvoltages for which the instrument is designed.

However, a CAT rating isn’t permission to test any circuit at or below the stated voltage without additional precautions.

Always use appropriately rated test leads, follow the meter’s instructions, and select equipment suitable for the installation.

When working on energized equipment, proper training, protective equipment, and established safety procedures remain essential.

Real-World Performance and Applications

Specifications are important, but what matters most is whether a multimeter provides the functions you need for your regular work.

Everyday Electrical Troubleshooting

The Fluke 117 is particularly suitable for common electrician tasks, including:

Voltage Checks: Measuring AC or DC voltage within the meter’s rated limits.
Continuity Testing: Checking appropriately isolated wiring and components for continuity.
Resistance Testing: Measuring resistors and de-energized circuit components.
Ghost Voltage Checks: Using AutoVolt LoZ when appropriate.
Basic Current Testing: Measuring current within the instrument’s 10A rating and approved connection method.

The automatic voltage selection and backlit display can make these jobs more convenient.

However, the meter won’t identify incorrect outlet wiring on its own. Interpreting hot, neutral, and ground measurements still requires knowledge of the circuit and appropriate test procedures.

HVAC Troubleshooting

The Fluke 117 can be useful for checking supply voltages, continuity, and electrical components in HVAC equipment.

Its capacitance function also allows measurement of suitable capacitors within the specified range.

However, capacitors must be safely isolated and discharged according to the equipment manufacturer’s procedures before testing.

The Fluke 117 doesn’t measure temperature, which is a significant limitation for technicians who regularly diagnose heating and cooling systems.

For temperature readings and HVAC-specific functions, the Fluke 116 may be a better choice.

Industrial and VFD Applications

Although the Fluke 117 is a professional multimeter, it isn’t designed to replace specialized industrial test equipment.

Variable-frequency drive outputs can contain high-frequency switching signals that make conventional voltage measurements difficult to interpret.

The Fluke 117’s True RMS capability is useful within its specified frequency range, but it does not provide the specialized VFD low-pass filter found on certain industrial meters.

For direct drive-output measurements, use equipment specifically rated and designed for that application.

Automotive Electrical Testing

The Fluke 117 can also be used for several basic automotive electrical checks.

For example, it can measure 12V battery voltage, voltage drops, continuity, and resistance where the testing procedure permits.

However, it’s not a dedicated automotive diagnostic multimeter. It lacks functions such as RPM measurement and some specialized sensor-testing capabilities.

It also cannot replace an OBD-II scanner when you need trouble codes or live engine data.

Battery Life and Power Management

The Fluke 117 uses a standard 9V alkaline battery rather than AA batteries.

According to Fluke, typical battery life is approximately 400 hours without the backlight.

The meter also includes an automatic power-saving function to reduce unnecessary battery drain.

Actual battery life depends on usage, backlight operation, battery quality, and operating conditions.

When replacing the battery, follow the instructions in the Fluke 117 user manual. Disconnect the test leads from the circuit before opening the battery compartment.

Advantages and Limitations of the Fluke 117

No Fluke 117 Review would be complete without discussing both its strengths and weaknesses.

Pros

True RMS Measurements: Useful for many modern electrical systems with non-sinusoidal AC waveforms.
AutoVolt Function: Automatically selects AC or DC voltage for convenient testing.
VoltAlert Detection: Provides a useful preliminary indication of nearby AC voltage.
LoZ Measurement: Helps distinguish ghost voltage from substantial voltage sources.
Readable Display: Includes a backlight and analog-style bar graph.
Professional Construction: Compact design with a published CAT III 600V safety rating.
AC/DC Current Testing: Measures up to 10A within the manufacturer’s limits.
Good Battery Life: Approximately 400 hours of typical use without the backlight.

Cons

No Temperature Measurement: Limits its usefulness for certain HVAC and industrial applications.
No Dedicated VFD Filter: Less suitable for specialized variable-frequency drive measurements.
10A Current Limit: Higher-current applications require appropriate alternative equipment.
No Built-In Bluetooth or Data Logging: Not ideal for users needing long-term automated recording.
Higher Initial Cost: More expensive than many basic digital multimeters.
Limited Specialized Functions: Lacks some advanced industrial and automotive measurement features.

Fluke 117 vs Fluke 115

The Fluke 115 and Fluke 117 belong to the same family, and both provide True RMS measurements for general electrical testing.

The main difference is that the Fluke 117 adds AutoVolt, VoltAlert, and a low-input-impedance function.

These additional features are particularly useful for electricians troubleshooting building wiring.

The Fluke 115 remains a practical alternative if you primarily need standard voltage, current, resistance, and continuity measurements.

For a closer comparison, see our Fluke 115 multimeter review.

Verdict: Choose the Fluke 117 if AutoVolt, VoltAlert, and ghost-voltage testing matter to your work. Choose the 115 if you don’t need those additional features.

Fluke 117 vs Fluke 116

The Fluke 116 is designed primarily for HVAC technicians.

Its features include temperature measurement and microamp testing, which can be useful for HVAC diagnostics.

The Fluke 117 focuses more on general electrical troubleshooting, providing VoltAlert and a 10A current measurement function.

Verdict: The Fluke 116 is usually more appropriate for HVAC-specific tasks, while the 117 better suits electricians who want its voltage-detection and LoZ features.

Fluke 117 vs Fluke 87V

The Fluke 87V is an industrial multimeter with advanced measurement capabilities.

Compared with the Fluke 117, it provides higher voltage measurement capability, a higher installation-category rating, temperature measurement, and a selectable low-pass filter useful for certain VFD applications.

The Fluke 117 is smaller and simpler, making it a convenient choice for everyday building electrical work.

Verdict: Choose the 87V for advanced industrial troubleshooting. For routine electrical maintenance, the Fluke 117 may offer the more practical combination of features and portability.

Quick Comparison Table: Fluke 117 vs Alternatives

Model	Best For	Important Difference	Product Listing
Fluke 117	Building electricians	True RMS, AutoVolt, VoltAlert, LoZ	Check Price
Fluke 115	General electrical testing	True RMS without integrated VoltAlert	Check Price
Fluke 116	HVAC technicians	Temperature and microamp measurement	Check Price
Fluke 87V	Industrial electrical work	Advanced measurements and VFD low-pass filter	Check Price
Klein Tools MM6000	Users comparing additional functions	Check the exact model’s measurement and safety specifications	Check Price
Extech EX570	Users comparing specialized functions	Check the current model’s features and availability	Verify Current Availability

Different multimeters can offer useful features for different applications. Rather than choosing based only on brand or price, compare the measurement functions, electrical safety ratings, accuracy specifications, and test-lead compatibility.

Pricing and Availability

The Fluke 117 is a professional digital multimeter, so it generally costs more than basic consumer-grade meters.

However, prices vary between retailers, countries, and product bundles.

Some listings include additional accessories such as cases, leads, or magnetic hanging kits, which may affect the total price.

Instead of relying on an older fixed price range, check the current listing and confirm exactly what is included.

When buying a professional electrical instrument, an authorized distributor can also provide greater confidence in product authenticity and warranty support.

Check Today’s Price

Who Should Buy the Fluke 117?

Best For

Electricians working with residential and commercial electrical systems within the meter’s safety ratings.
Maintenance technicians who need reliable voltage, resistance, continuity, and basic current measurements.
Professionals who frequently encounter ghost voltage in wiring installations.
Experienced DIY users looking for a dependable professional multimeter.
Technicians who value integrated AutoVolt and VoltAlert functions.

Not Ideal For

HVAC specialists who regularly need temperature or flame-sensor microamp measurements.
Industrial technicians who require specialized VFD testing functions.
Users who need wireless logging or advanced data recording.
Anyone needing measurements beyond the meter’s specified electrical ratings.
Occasional users who only need simple low-voltage tests and do not require its professional features.

Fluke 117 Troubleshooting Guide

Even a reliable multimeter can occasionally display unexpected readings or develop operating problems. Here are some common issues and the first things to check.

Problem	Possible Cause	What to Do
Display won’t turn on	Weak 9V battery or battery connection problem	Disconnect all test leads from circuits, then inspect or replace the battery according to the manual
Backlight isn’t working	Backlight not activated or battery issue	Check the backlight control and battery condition
Voltage reading seems incorrect	Wrong function, poor lead contact, or unsuitable measurement conditions	Check the selected function, test leads, and manufacturer-specified limits
No continuity tone	Open circuit, wrong setting, or damaged test leads	Use continuity mode on a verified de-energized circuit and inspect the leads
VoltAlert doesn’t respond	Detection limitations or possible instrument problem	Do not assume the circuit is safe; use approved contact testing to verify voltage status
OL appears	Open circuit or an over-range condition, depending on the function	Check the selected measurement function and its meaning in the user manual
Capacitance readings are unstable	Residual charge, connected circuitry, or interference	Have the capacitor safely isolated and discharged using the correct procedure before testing
Meter shuts off unexpectedly	Automatic power-off or weak battery	Check the operating instructions and battery condition
Test leads or meter become hot	Possible overload, incorrect connection, or fault	Stop testing immediately and have the equipment inspected before further use
Readings remain inconsistent	Lead damage, environmental effects, or calibration issue	Check the leads and arrange qualified service or calibration if necessary

Safety reminder: Never open the battery compartment or attempt to repair the meter while its test leads are connected to an energized circuit. For internal faults, damaged input protection, or suspected measurement errors, contact qualified service personnel.

When Would a Clamp Meter Be a Better Choice?

The Fluke 117 can measure current directly through its input terminals, but this requires the meter to be connected correctly into the circuit and operated within its current rating.

For some electrical maintenance tasks, a clamp meter is a more convenient option because it measures current by clamping around an individual conductor rather than being inserted into the circuit.

This is especially useful when checking higher-current AC loads, provided the instrument is rated for the application and the technician follows appropriate electrical safety procedures.

For example, our Fluke 323 True RMS clamp meter review covers an alternative designed for AC current measurements.

However, the Fluke 323 is not a direct replacement for every function of the Fluke 117. Your choice should depend on whether you need general multimeter measurements, clamp-based current testing, or both.

Final Verdict: Fluke 117 Review 2027

After examining its features, specifications, and limitations, the Fluke 117 remains a strong option for everyday professional electrical troubleshooting.

Its combination of True RMS measurements, AutoVolt, VoltAlert, and low-input-impedance testing provides several practical advantages for electricians.

The backlit display, compact construction, and 10A current measurement capability also make it useful for many routine electrical tasks.

However, it does have limitations. It doesn’t measure temperature, lacks a dedicated VFD low-pass filter, and doesn’t include advanced connectivity features.

Our recommendation: If you regularly work on building electrical systems and need a reliable meter with convenient voltage-testing features, the Fluke 117 is worth considering. If your work centers on HVAC temperature measurements or advanced industrial drives, a more specialized multimeter may be a better fit.

Overall, the Fluke 117 Review shows that its real value comes from combining dependable everyday measurements with features designed for electrical troubleshooting, rather than trying to include every advanced function.

FAQs

1. Is the Fluke 117 good for beginners?

The Fluke 117 has a straightforward layout and convenient functions such as AutoVolt, but it’s still a professional electrical measuring instrument. Beginners can use it for suitable low-voltage tasks after learning correct measurement procedures. Working on energized mains circuits requires appropriate training and safety precautions.

2. Can the Fluke 117 measure temperature?

No. The Fluke 117 does not include temperature measurement. If you regularly need temperature readings for HVAC work, consider a suitable meter such as the Fluke 116 or an industrial model with a temperature function.

3. How accurate is the Fluke 117?

The Fluke 117 has a specified DC voltage accuracy of ±(0.5% of reading + 2 counts). Its AC measurements use True RMS technology, with accuracy depending on frequency, range, waveform, and other conditions described in the official specifications.

4. Does the Fluke 117 measure current directly?

Yes. It measures AC and DC current up to 10A within its specified limits. Current measurement requires the correct input connections and circuit setup. Never place the meter in current mode directly across a voltage source.

5. What battery does the Fluke 117 use?

The Fluke 117 uses one 9V alkaline battery, IEC 6LR61. Fluke specifies approximately 400 hours of typical operation without the display backlight. Actual battery life varies with use and conditions.

6. Is the Fluke 117 worth buying for electricians?

Yes, it can be a good choice for electricians who need True RMS, AutoVolt, VoltAlert, and LoZ testing in a compact meter. However, check that its CAT III 600V rating and measurement functions are suitable for your actual work before purchasing.