8588A Reference Multimeter
Key Features
- Digitizing multimeter designed specifically for calibration laboratories, metrologists, automated test equipment (ATE), and semiconductor characterization.
- More than 12 measurement functions; digitize voltage, digitize current, and external shunts for DC and AC current, consolidating into a single instrument.
- Intuitive user interface with color display and easy-to-navigate menu structure for all configurations.
- Supports minimum of 100,000 readings per second at 4.5 digits across GPIB, USB or Ethernet.
Product overview: 8588A Reference Multimeter
Precision, Stability, and Throughput
The Fluke Calibration 8588A Reference Multimeter is engineered for ultra-stable, low-noise performance, designed for metrologists, automated test equipment, semiconductor characterization within semiconductor manufacturing, and high-accuracy calibration labs. With best-in-class linearity and long-term stability, it delivers 3.5 ppm one-year DC voltage relative accuracy and 8.5-digit resolution in one second, without daily internal self-calibration or autozeroing. Gain higher throughput and measurement confidence in the most demanding production environments.
A modern, multilingual UI and visualization tools streamline setup, training, and analysis. Perform real-time and post-capture evaluation—trends, histograms, FFT, and statistics—without a PC. Visual Connection Management™ guides correct connections, while front/rear input switching supports ratio, difference, and deviation workflows.
- Graphical display: trend plots, histograms, FFT, and statistical views for quick insight.
- Interfaces: Ethernet, GPIB, USBTMC for system control; USB host (front/rear) for .csv export and firmware updates.
- Compatibility: Full Fluke 8508A emulation and Keysight 3458A SCPI command compatibility to accelerate upgrades.
- Front/rear input scanning for ratio/difference/deviation in DCV and resistance.
- Capacitance and RF power readout support (Rohde & Schwarz NRP Series) to extend multi-product calibration capability.
DC Accuracy & Long-Term Stability
Custom-crafted, ultra-stable voltage references and attenuators—designed by Fluke Calibration—preserve accuracy over time and temperature. Ultra-stable amplifier offsets eliminate the need for autozeroing, reducing cycle time in automated sequences. This architecture maintains superior accuracy and repeatability across a wide range of DC voltage and resistance measurements, even under rigorous semiconductor, GPU/Power-Cell Characterization and ATE workloads.

Key DC Performance
- DC voltage relative accuracy: 2.7 µV/V (95%), 3.5 µV/V (99%), 1-year—without internal self-calibration or auto-adjustments.
- DC stability (24-hour): 0.5 µV/V (95%), 0.65 µV/V (99%).
- Resistance accuracy (1-year): 7 µΩ/Ω (95%), 9 µΩ/Ω (99%).
- 2.02× full-scale stretch lowers noise floor and extends dynamic range for higher accuracy.
- Aperture control: 200 ns to 100 s for precise data windowing in semiconductor and ATE applications.

World-Class AC RMS Performance for Low-Level Signals
With a 5 MS/s ADC and a highly stable analog path, the 8588A achieves AC measurements that are up to 10× faster, 2× lower noise, and more sensitive for low-level signals than other instruments in its class. Digital RMS calculations retain full resolution across a wide dynamic range, while rapid digital filters avoid dielectric absorption effects common to analog filters—shortening settling to within 6 cycles of the filter frequency and <1 ppm of final value.
- AC voltage accuracy: 60 µV/V (95%), 77 µV/V (99%), 1-year.
- AC current accuracy: 250 µA/A (95%), 323 µA/A (99%), 1-year.
- Settling time: ~15 ms at 1 kHz AC filter—up to 10× faster for AC voltage measurement.
- Dynamic range: 2.02× Vpp, 1.2× Vrms full scale.
- Peak AC current up to 30 A extends high-current test coverage in ATE.
Optional 8588A Null Detector for Standards and System Balancing
The 8588A/Null Meter option replaces analog null detectors for exacting comparisons between standards or between primary and secondary references. It enables rapid, automated, and precise zero-difference detection to balance systems and minimize uncertainty.

- Bias current: specified <20 pA (typical <5 pA).
- Balanced resistor network resolution: typically 0.2–0.5 ppm.
- Selectable ranges: ±100 nV to ±100 mV optimized for null applications.
- Responsiveness: <1 s at 8.5-digit resolution for fast tuning and automation.
- Integrated 5 Hz low-noise filter for superior performance vs. analog null meters.
- Flexible speed/settling settings for automated sequences.
System Integration & Migration (3458A / 8508A)
The 8588A/8558A instruments provide full emulation of the Fluke 8508A and limited emulation of SCPI command compatibility with the Keysight 3458A, enabling rapid migration in legacy ATE and semiconductor test systems. This reduces programming rework, shortens validation time, and lowers risk when replacing aging long-scale DMMs.
The Clear Choice for ATE and Semiconductor Applications
- High throughput: 8.5-digit reading in 1 s—twice as fast as competitive instruments for shorter test cycles.
- Drop-in system migration: SCPI command compatibility with Keysight 3458A and full Fluke 8508A emulation to minimize code changes.
- Exceptional long-term stability: Ultra-stable voltage references and attenuators eliminate drift-related daily adjustments.
- Low noise floor: 2.02× full-scale stretch and wide aperture control maximize precision at low signal levels.
- Flexible data capture: 200 ns to 100 s aperture settings support diverse semiconductor and ATE measurement windows.
- Robust I/O: Ethernet, GPIB, USBTMC, plus front/rear USB host for data export and updates.
Technical Specifications (At-a-Glance)
- DCV one-year relative accuracy: 3.5 ppm; 24-hour stability down to 0.5 µV/V (95%).
- Resistance (1-year): 7–9 µΩ/Ω.
- ACV (1-year): 60–77 µV/V; AC current (1-year): 250–323 µA/A.
- Measurement speed: 8.5-digit in 1 second; AC settling ~15 ms @ 1 kHz filter.
- Aperture: 200 ns to 100 s; Dynamic range stretch: 2.02× full scale.
- Peak AC current: up to 30 A; Null ranges: ±100 nV to ±100 mV.
The MET/CAL™ Calibration Management Software advantage
The 8588A and 8558A work with Fluke Calibration MET/CAL™ Calibration Software with native MET/CAL support or using 8508A emulation mode to increase throughput up to four times that of traditional manual and multi-product methods while ensuring calibrations are performed consistently every time. This powerful software documents calibration procedures, processes and results for ease in complying with ISO/IEC 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.
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 CarePlans. (Note: Priority shipping times vary by country. Contact your local Fluke Calibration sales representative for details.)
FAQs
Is the 8588A a drop-in replacement for Keysight 3458A in ATE systems?
The 8588A/8558A support SCPI command compatibility with the 3458A and full emulation of the Fluke 8508A, significantly reducing code changes and validation time in legacy ATE environments.
How does the 8588A improve semiconductor test throughput?
It delivers an 8.5-digit reading in one second and features fast digital filters with ~15 ms settling at 1 kHz, cutting wait times and accelerating test sequences.
What benefits does the Null Detector option provide?
It enables ultra-precise zero-difference measurements between standards with selectable ±100 nV to ±100 mV ranges and <1 s responsiveness, ideal for automated balancing and comparison workflows.
Can I control the 8588A via common ATE interfaces?
Yes. It supports Ethernet, GPIB, and USBTMC for system integration, plus front/rear USB host ports for data export and firmware updates.
Specifications: 8588A Reference Multimeter
8588A complete specifications
8558A complete specifications
| Key feature and specification comparison | 8588A | 8558A |
| DC voltage | 100 mV – 1000 V | 100 mV – 1000 V |
| AC voltage | 10 mV – 1000 V, 1 Hz – 10 MHz | 10 mV – 1000 V, 1 Hz – 10 MHz |
| Resistance, LoI, HV | 1 Ω - 10 GΩ | 1 Ω - 10 GΩ |
| DC current | 10 uA – 30 A | 10 uA – 2 A |
| AC current | 10 uA – 30 A, 1 Hz to 100 kHz | 10 uA – 2A, 1 Hz to 100 kHz |
| Digitize V | 100 mV - 1000 V, 5 MSamples/s, up to 20 MHz BW | 100 mV - 1000 V, 5 MSamples/s, up to 20 MHz BW |
| Digitize I | 10 uA - 30 A, 5 MSamples/s, up to 4 MHz BW | 10 uA - 2 A, 5 MSamples/s, up to 4 MHz BW |
| Frequency (V, I, BNC) | 1 Hz to 10 MHz, 1 Hz to 100 kHz, 10 Hz to 100 MHz | 1 Hz to 10 MHz, 1 Hz to 100 kHz, 10 Hz to 100 MHz |
| Temperature | PRT / Thermocouple (ext CJC) | PRT / Thermocouple (ext CJC) |
| Capacitance | 1 nF – 100 mF | No |
| RF power | R&S NRP Series | No |
| Ext. dc current and ac current | A40B current shunt and other shunts | No |
| Graphical display | Yes | Yes |
| Visual Connection Management ® | Yes | Yes |
| Programmable front/rear input switching | Yes | Yes |
| Ratio difference, deviation - ohms, voltage, current | Yes | Yes |
| External 10 MHz ref clock, 50 Ω/Hi-Z | Yes | Yes |
| A40B and other shunt asset management | Yes | No |
| GPIB 488.2, Ethernet, USB TMC | Yes | Yes |
| SCPI command compatibility | Yes | Yes |
| 3458A emulation, 8508A emulation | Yes | Yes |
| Volatile memory | 15 million | 15 million |
| Level and other trigger | Yes | Yes |
| FFT onboard | Yes | No |
| Reading rates: 5 MS/s into memory, bus: 100 kS/s at 4.5 digits, 1 rdg/s at 8.5 digits | Yes | Yes |
| Function | 8588A uX/X of reading + uX/X of range | 8558A uX/X of reading + uX/X of range | ||||
| 95% | 99% | 95% | 99% | |||
| DC voltage | 10 V | relative | 2.7 + 0.05 | 3.5 + 0.06 | 4.0 + 0.06 | 5.2 + 0.08 |
| absolute | 2.8 + 0.05 | 3.6 + 0.06 | 4.1 + 0.06 | 5.3 + 0.08 | ||
| AC voltage | 10 V, 1 kHz | relative | 60 + 5 | 77 + 6.5 | 80 + 10 | 103 + 13 |
| absolute | 64 + 5 | 83 + 6.5 | 90 + 10 | 116 + 13 | ||
| Resistance | 10 kΩ | relative | 7 + 0.5 | 9 + 0.6 | 10 + 0.6 | 13 + 0.7 |
| absolute | 7.2 + 0.5 | 9.2 + 0.6 | 10.3 + 0.6 | 13.3 + 0.7 | ||
| DC current | 1 mA | relative | 6.5 + 4 | 8.4 + 5 | 9 + 5 | 12 + 6 |
| absolute | 7.6 + 4 | 10 + 5 | 9.8 + 5 | 13 + 6 | ||
| AC current | 1 mA, 1 kHz | relative | 250 + 50 | 323 + 65 | 300 + 100 | 387 + 129 |
| absolute | 260 + 50 | 335 + 65 | 310 + 100 | 400 + 129 | ||
| Frequency | BNC,1 kHz | relative | 0.5 uHz/Hz | 0.5 uHz/Hz | 0.5 uHz/Hz | 0.5 uHz/Hz |
| Temperature | PRT 100 Ω | relative | ± 5 mK | ± 5 mK | ± 5 mK | ± 5 mK |
| Capacitance | 1 uF | relative | 400 + 100 | 516 + 129 | N/A | N/A |
| absolute | 406 + 100 | 523 + 129 | N/A | N/A | ||
95% 1 year relative specification. Fluke Calibration guarantees to 99% confidence interval k=2.58. For 99%, multiply by (2.58/2).
Looking for lower specs? See our other benchtop multimeters:
Bench Multimeter Selection Guide
| Model | Resolution | Accuracy | Application |
| 8588A | 8.5 | 2.7 µV/V 95% confidence level, 1 year relative accuracy | Metrology |
| 8558A | 8.5 | 4.0 µV/V 95% confidence level, 1 year relative accuracy | High-Speed Automation |
| 8845A/8846A | 6.5 | Basic V dc accuracy of up to 0.0024 % | Bench |
| 8808A | 5.5 | Basic V dc accuracy of 0.015 % | Bench |
Models: 8588A Reference Multimeter
Manuals + Resources: 8588A Reference Multimeter
- 8588A Reference Multimeter / 8558A 8.5-Digit Multimeter
- Inside the newest 8.5 digit Reference Multimeter
- Replacing analog null detectors with precision multimeters
- Overview of 8588A and 8558A calibration support processes and equipment requirements
- Verifying the capacitance function of the 8588A Reference Multimeter
- Improved verification of a 55XX Series Multi-Product Calibrator with an 8588A Reference Multimeter



