Fluke 8558A 8.5-Digit Multimeter


The 8558A 8.5-digit multimeter offers 5 mega-samples-per-second high resolution digitizing for system automation in labs and manufacturing test environments.  Fluke’s new high-speed system design and the industry’s fastest direct digitizing capability enable significant throughput increases for many automated system applications that require a combination of highest speed and best accuracy.  The superb accuracy is delivered over a wide measurement range, over nine functions, with an intuitive user interface on a color display.

The 8558A shares the same platform as the fully loaded 8588A Reference Multimeter. The platform features a common intuitive user interface with easy-to-navigate menu structure for all configuration and matching SCPI-compliant commands for automated environment. The 8588A platform guarantees a minimum of 100,000 readings per second at 4.5 digits across GPIB, USBTMC or Ethernet, and an onboard data memory that can hold up to 15 million readings.

8558A feature callouts

Fluke 8558A with callouts (Front)

A. Visual Connection Management terminals
Active terminals light up, guiding the user to make the correct connections.

B. Easy-to-access configurations
Range, aperture, input impedance, RMS filter and other measurement configurations are readily available.

C. Large, bright full color display
The intuitive user interface and flat menu structure make it easy to access configurations and view trend plots, waveforms, FFT, histogram and statistics.

D. Programmable front/rear electronic switch
Eliminates manual operation and allows immediate ratio results through a single remote command.

E. 30 A terminal (8588A only; 2A for 8558A)
Enables industry's widest current measurement range through a single terminal.

F. Soft menu keys
Adapt to the active function, so the menu structure is intuitive and easy to learn.

G. Multi-language selection
Choice of English, Chinese, French, Japanese, Korean, Russian and Spanish.

H. Run/Stop trigger
Toggles the continuous, or free run, measurement state.

I. USB ports
Download data quickly and easily to a flash drive.

Fluke 8558A with callouts (Back)
J. Trig in/Trig out
Precise triggering maximizes synchronization in system automation.

K. Freq Counter
Enables 100 MHz frequency counter measurement at 0.5 uHz/z.

L. Rear panel input terminals
Mirrors front panel input terminals for connection compatibility and allows for front/rear ratio measurement.

M. IEEE 488, LAN, USB interfaces
Standard remote interface for straightforward system integration.

N. USB port
Download data quickly and easily to a flash drive.

O. 2 A terminal

8558A key features and performance

DC voltage
  • 100 mV to 1000 V, (1050V max)
  • 2.02x full scale
  • Maximum resolution: 1 nV
  • 4.0 μV/V (95 %) 5.7 μV/V (99 %), 1 year
  • 0.5 μV/V (95 %) 0.65 μV/V (99 %), 24 hour stability
  • 0 to 10 s reading aperture (200 ns resolution)
DC current
  • 10 uA to 2 A (8558A)
  • 2.02x full scale
  • Maximum resolution: 1 pA
  • 9 μA/A (95 %), 12 μA/V (99 %), 1 year
  • 0 ns to 100 s reading aperture
AC voltage
  • 10 mV to 1000 V, 1 Hz to 10 MHz, (1050 Vrms max)
  • 2.02x full scale Vpp, 1.2x full scale Vrms
  • Maximum resolution: 1 nV
  • 80 μV/V (95 %), 103 μV/V (99 %), 1 year
AC current
  • 10 uA to 30 A (8588A only; 2 A for 8558A)
  • 2.02x full scale Vpp, 1 Hz to 100 kHz 1.2x full scale Vrms
  • Maximum resolution: 1 pA
  • 300 μA/A (95 %), 387 μA/V (99 %), 1 year
  • 1Ω to 10 GΩ (20 GΩ max)
  • 2.02x full scale
  • Maximum resolution: 10 nΩ
  • 10 μΩ/Ω (95 %), 13 μΩ/Ω (99 %), 1 year
  • Low current mode, high voltage mode and Tru Ohms™
Digitize V
  • 100 mV to 1000 V, (1050 V max)
  • 2.02x full scale
  • Maximum resolution: 18 bits
  • 5 mega-samples per second sample rate
  • Up to 20 MHz bandwidth
Digitize I
  • 10 μA to 30 A (8588A only; 2 A for 8558A)
  • 2.02x full scale
  • Maximum resolution: 18 bits
  • 5 mega-samples per second sample rate
  • Up to 4 MHz bandwidth
Frequency or period
  • Voltage, up to 10 MHz
  • Current, up to 100 kHz
  • Frequency up to 100 MHz on BNC
  • 0.5 μHz/Hz, 1 year
  • 1 nF to 100 mF
  • 400 μF/F, 1 year
  • PRT and thermocouple
  • 5 mK, 1 year
RF power
  • Rhode & Schwarz NRP series DC I and AC I external shunt

DC I and AC I external shunt

  • A40B and any other external shunt
Reading speed
  • 1 reading /s @ 8.5 digit into memory
  • 100,000 readings /s @ 4.5 digit into memory
  • Up to 500,000 readings /s into volatile memory in digitize V and I
  • Up to 500,000 readings/s transfer through USB in binary format
Measurement memory
  • 15 million readings
  • 7.5 million readings with time stamp
GPIB, USBTMC, Ethernet
  • Native SCPI compliant remote commands
  • 8508A and 3458A emulation mode
  • Fully support MET/CAL™ calibration procedures library in Fluke 8508A emulation
  • IVI driver
  • USB thumb drive for convenient data transfer in .csv format
Trigger mechanisms
  • Manual trigger
  • External BNC Trig In and Trig Out
  • Internal or level trigger
  • Timer trigger
  • Epoch trigger
  • Line trigger
  • BUS trigger
CE and CSA compliant

Accurate data, delivered amazingly fast

Shorter test time on the 8588A/8558A high-speed digital platform enables you to increase throughput, improve yield and realize a greater return on your investment. The 8588A/8558A digitizes to memory at 200 nanoseconds per reading and delivers 4.5 digit data to a PC via USB, Ethernet and GPIB at 100,000 readings per second. Fast, high resolution data capture gives you the quantity and quality of information you need to make timely, correct decisions affecting system throughput and efficiency.

  • 0 ns to 100 s aperture setting allows industry’s widest flexibility to control data capture window
  • Reading speed: 1 reading /s @ 8.5 digits to 100,000 reading /s @ 4.5 digits
  • Data transfer from memory to PC: up to 500,000 readings /s in binary format through USB, up to 200,000 through Ethernet and GPIB

Debug and perfect your device under test

The 8558A features a 5 mega-sample digitizing rate with up to 20 MHz analog bandwidth, making it the first and only instrument on the market that can characterize extremely low level transient signals at 18-bit resolution. This capability makes it easier to debug designs, uncover anomalies and perfect your devices under test for use in real life environments.

  • Voltage sensitivity to hundreds of nV and current sensitivity to hundreds of pA allows you uncover ultra-low level transient signals
  • Up to 20 MHz bandwidth for voltage and 4 MHz for current retains high bandwidth content of the signal measured
  • 18-bit SAR analog-to-digital converter that achieves 5 mega-samples per second
  • 5 mega-samples per second sample rate, into buffer, for capturing complex, fast changing waveforms
  • 15 million readings memory allows large amount of data storage eliminating the
  • immediate need to transfer data to a PC
  • Graphical waveform display enables real-time visualization of complex waveforms, increased productivity with faster access to results and answers

Fast, reliable and accurate system compatibility

Inserting a new instrument into a tightly synchronized system can create overhead and incompatibility. The 8558A’s digital platform includes common connectivity interfaces plus precise triggering that lets it digitize, integrate and transfer data to anywhere in the system for analysis, with minimal obstruction and the highest reliability.

  • GPIB, USBTMC, Ethernet allows industry standard selection of remote interface
  • USB thumb drive enable quick and easy data transfer to PC in .csv format
  • SCPI compliant commands with 8505A and 3458A emulation mode simplifies and accelerates system upgrade process to 8588A/8558A
  • Fully supports MET/CAL calibration procedures library that commands the Fluke 8508A
  • IVI Driver for industry standard control of DMM on 8558A/8588A
  • Trigger Mechanisms: External BNC Trigger Trig In and Trig Out, Edge or level trigger, Timer trigger, Epoch trigger, Line trigger
  • Less than 100 ns trigger latency with external BNC trigger for digitize voltage and current

8558A Analyze: FFT, screen capture

Analyze: FFT

8558A Trend Plot, screen capture

Trend Plot

8558A Trigger System, screen capture

Trigger System

Usability features ease training and operation

Some popular system digit multimeters have complex menu structures and unintuitive commands, while others lack any user interface, presenting barriers to training and operation. By contrast, the 8558A features an easy-to-access configuration menu that makes it easy to train new users. Language choices include English, Chinese, French, German, Japanese, Korean, Russian and Spanish. The graphical display lets you easily visualize trends, histograms, complex waveforms, and statistics. Repeatable system-specific tasks can be automated quickly and easily.

The 8558A’s front panel features Visual Connection Management™ output terminals that light up to show which terminals are active, guiding the user to make the correct connections. The handles and spin wheel are over-molded for comfort and easy transport.

USB host ports are placed both on the front and rear of the unit. Use them to export data to external memory devices and simplify firmware updates.

8558A Trend Plot, screen capture

Trend Plot

8558A Analyze: Histogram, screen capture

Analyze: Histogram

The MET/CAL™ Calibration Management Software advantage

The 8588A and 8558A work with Fluke Calibration MET/CAL™ Calibration Software,, in 8508A emulation mode, allowing increased throughput while ensuring calibrations are performed consistently every time. This powerful software documents calibration procedures, processes and results for ease in complying with ISO 17025 and similar quality standards.

Support and services when you need them

Fluke Calibration offers testing, repair and calibration services to meet your needs quickly and at a fair cost while maintaining the high level of quality that you expect. Our electrical calibration laboratories are accredited for conformance to ISO Guide 17025 and we maintain global calibration and repair facilities.

Get peace of mind and uptime with a Gold CarePlan service package

The 8588A/8558A multimeters come with a standard one year factory warranty. You can enhance warranty protection with a Priority Gold Instrument CarePlan service package.

A Priority Gold Instrument CarePlan includes an expedited annual calibration to reduce downtime by a week and extended warranty to help ensure the best long-term performance from your instruments. Choose from one-year, three-year or five-year Care- Plans. (Note: Priority shipping times vary by country. Contact your local Fluke Calibration sales representative for details.)


Key feature and specification comparison

  8558A 8588A
DC voltage same 100 mV – 1000 V
AC voltage same 10 mV – 1000 V, 1 Hz – 10 MHz
Resistance, LoI, HV same 1 Ω - 10 GΩ
DC current 10 uA – 2 A 10 uA – 30 A
AC current 10 uA – 2A, 1 Hz to 100 kHz 10 uA – 30 A, 1 Hz to 100 kHz
Digitize V Same 100 mV - 1000 V, 5 MSamples/s, up to 20 MHz BW
Digitize I
10 uA - 2 A, 5 MSamples/s,
up to 4 MHz BW
10 uA - 30 A, 5 MSamples/s, up to 4 MHz BW
Frequency (V, I, BNC) Same 1 Hz to 10 MHz, 1 Hz to 100 kHz, 10 Hz to 100 MHz
Temperature Same PRT / Thermocouple (ext CJC)
Capacitance No 1 nF – 100 mF
RF power No R&S NRP Series
Ext. dc current and ac current No A40B current shunt and other shunts
Graphical display Yes Yes
Visual Connection Management ® Yes Yes
Programmable front/rear input switching Yes Yes
Ratio ohms, voltage Yes* Yes
External 10 MHz ref clock, 50 Ω/Hi-Z Yes Yes
A40B and other shunt asset management No Yes
GPIB 488.2, Ethernet, USB TMC Yes Yes
SCPI command compatibility Yes Yes
3458A emulation, 8508A emulation Yes Yes
Memory Same 15 million
Level and other trigger Yes Yes
FFT onboard No Yes
Reading rates: 5 MS/s into memory, bus: 100 kS/s at 4.5 digits, 1 rdg/s at 8.5 digits Yes Yes

*Ratio for voltage only

Function     8558A uX/X of reading + uX/X of range 8588A uX/X of reading + uX/X of range
      95% 99% 95% 99%
DC voltage 10 V relative 4.0 + 0.06 5.2 + 0.08 2.7 + 0.05 3.5 + 0.06
absolute 4.1 + 0.06 5.3 + 0.08 2.8 + 0.05 3.6 + 0.06
AC voltage 10 V, 1 kHz relative 80 + 10 103 + 13 60 + 5 77 + 6.5
absolute 90 + 10 116 + 13 64 + 5 88 + 6.5
Resistance 10kΩ relative 10 + 0.6 13 + 0.7 7 + 0.5 9 + 0.6
absolute 10.3 + 0.6 13.3 + 0.7 7.2 + 0.5 9.1 + 0.6
DC current 1 mA relative 9 + 5 12 + 6 6.5 + 4 8.4 + 5
absolute 9.8 + 5 13 + 6 7.6 + 4 10 + 5
AC current 1 mA, 1 kHz relative 300 + 100 387 + 129 250 + 50 323 + 62
absolute 310 + 100 400 + 129 260 + 50 335 + 65
Frequency 1 kHz relative N/A N/A 0.5 0.5
Temperature PRT 100 Ω, 0°C relative ± 5 mK ± 5 mK ± 5 mK ± 5 mK
Capacitance 1 uF relative N/A N/A 400 + 100 516 + 129
absolute N/A N/A 408 + 100 523 + 129

95% 1 year relative specification. Fluke Calibration guarantees to 99% confidence interval k=2.58. For 99%, multiply by (2.58/2)


Model Name Description

8.5 Digit Multimeter


  • Meter
  • 8588A-LEAD KIT-OSP General purpose probe kit & pouch with 2x 4-way shorting PCB

Reference Multimeter


  • Meter
  • 8588A-LEAD KIT-OSP General purpose probe kit & pouch with 2x 4-way shorting PCB

Accessories common to all models:

Accessory Description
Y8588 Rack Mount Kit (2U – 3.5 in)
Y8588S Slide Rack Mount Kit
8588A-LEAD Comprehensive Measurement Lead Kit

  • 1x 8588A-LEAD KIT-OSP
  • 1x 1 m screen 322/0.1 copper (30 Amp Rating) with 6 mm gold plated copper spade terminals
  • 2x locking adapter 4 mm binding post to safety
8588A-SHORT 4-Way Shorting PCB
8588A-LEAD/THERMAL Low Thermal Lead Kit
8588A-7000K Cal Kit with 1 Gohm Standard and Connecting Leads
96000SNS Additional Power Sensor
8588A/CASE Transit Case

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