FLUKE8508A Reference-Level Digital Multimeter

Superior performance and accuracy | Stability:
The 8508A offers 8.5-digit resolution, exceptional linearity, and extraordinary low noise and stability. Among the various products available in today's market, it delivers uncontested accuracy in measurements. However, that's just one aspect. The measurement results must be repeatable today, tomorrow, next week, and even next year. This is why stability must be given the same priority as accuracy. The 8508A reference-level digital multimeter boasts a stability of 2.7 ppm over 365 days and 0.5 ppm over 24 hours, assuring us that the measurements conducted today will yield results as good as those from yesterday or last year.
Enhanced functionality and diversity
A metrologist must perform a wide range of measurements, which is part of the complexity of their job. For this purpose, they often require a set of complex instruments. The Fluke 8508A offers an extraordinary range of measurement capabilities. This means you can meet most of your measurement needs with a single instrument, offering cost savings in both time and money.
User-friendly:
Human error and a misunderstanding of measurement settings often significantly impact measurement accuracy, often due to complex, sophisticated user interfaces and unfamiliarity with the equipment. The Fluke 8508A features a clear control structure, a "Dual ParamatrixTM" display, and menus with explicit wording, providing a transparent, logical, and intuitive mechanism for better human-machine interaction with the instrument. Designed with the starting point of meeting the needs of metrologists, the commands and menu configurations of the 8508A are designed to ensure users can quickly and error-free utilize their complex measurement settings. This means you can focus on achieving excellent measurement results without having to perform complex sequential setups or involve multiple instruments, nor do you need to engage in complex mathematical or arithmetic calculations to obtain the desired measurement results.
Multi-functional measuring machine:
The Fluke 8508A, with its robust features and versatility, can replace other measurement equipment with a single multifunctional precision instrument, such as:

Voltage Measurement:
DC Voltage and AC Voltage Measurement for Model 8508ARangeFrom 200 mV to 1 kV, covering all voltage measurement requirements. On allRangeAll achieve full 8.5-bit resolution, providing a resolution of 1 nV. The AC measurement bandwidth is extended to 1 MHz. With its superior linearity and ratio measurement capabilities, the 8508A can replace Kelvin-Vally voltage dividers and AC/DC voltage conversion standards. This solution that utilizes one instrument for multiple applications significantly enhances work efficiency.
Outstanding performance in DC voltage measurement

Outstanding performance in AC voltage measurement

Current Measurement:
The 8508A features an outstanding new current measurement system. It is the first to achieve virtual zero ohms at the current input terminal. This means the measurement has a significantly reduced impact on the circuit, effectively presenting as zero load at the measurement point. The 8508A's current measurement function also has another advantage, eliminating the need for traditional complex shielding schemes in current measurements. This allows for more reliable, repeatable, and confident measurement work.RangeFrom 200μA to 20A, the frequency range spans from 1 Hz to 100 kHz, ensuring coverage for all your measurement needs, particularly including high current measurements required for calibrating a calibrator.
Advantages of Direct Current (DC) Current Performance
ResistorMeasurement
      ResistorMeasurementRangeFrom 2 Ω to 20 GΩ, with a resolution of 10 nΩ, the 8508A can truly be considered a completeResistorMeasurement System. Additionally, this instrument features a high companion voltage of 200 V and a large measurement current of 100 mA, thereby enabling you to understand that the 8508A is an illustrative aid that can help you expand so widely.ResistorMeasurement range. However, theResistorThe exceptional performance of the measurement system extends beyond its technical specifications. Focus on measurement technology helps you further enhance measurement results. When performing ratio measurements, forcing the same current to flow through twoResistorAnd only switch the measuring circuit. During the measurement process, the measuring current can be reversed to eliminate errors caused by the thermoelectric potential effect.

Temperature Measurement:
To further expand the scope of measurement operations, the 8508A offers 2-line, 3-line, or 4-line platinum...ResistorPRT or Standard PlatinumResistorSPRT Temperature Measurement Capability, ranging from -200 oC to 660 oC. The instrument provides both temperature andResistorReading, and equipped with ITS-90 and linearization capabilities according to the Callendar van Dusen formula, the 8508A is suitable for temperature measurement and platinumResistorPRT calibration is an ideal tool.ResistorDuring measurements, temperature measurement also employs reverse current technology to eliminate errors in thermoelectric potential. This increased flexibility provides you with the means to expand the range of precision measurement work. In many measurement tasks, you often have to use less ideal equipment; however, using the 8508A will yield better uncertainty.

Dual Input:
In addition to the conveniently located front panel input terminals, the 8508A also offers the option to install a set of rear panel input terminals. This is particularly valuable for ratio measurements, and the 8508A excels in voltage and...ResistorFunctionally, ratio measurements can be conducted. This set of terminals also provides the capability to force the same current to flow through twoResistorInstitution, to enhanceResistorPerformance in ratio measurement.