Fluke 8508A, 3458/HFL manual

ACV & DCV 4 wire input.	Selectable 2 and 4-wire	Unavailable	4-wire sense measurement support
	Selectable 2 and 4-wire		improved accuracy when calibrating
	measurement.		improved accuracy when calibrating
	measurement.		calibrators with 4 wire sense output.
			calibrators with 4 wire sense output.

Remote switched GUARD	IEEE controlled	Manual Switch	IEEE control of GUARD terminal helps fully
Remote switched GUARD			automate calibration without need for
Terminal			automate calibration without need for
Terminal			manual switching.
			manual switching.

	High Speed - 150 readings/sec @	High Speed - 100,000	High read rates are useful for some ATE
Read rate	5.5 digit resolution	reading/sec @ 4.5 digit	applications where accuracy is not of high
		resolution	priority.

			Both techniques have their merits. 8508A
			and associated calibration technique
	Individual Function and Range	Artifact Calibration & Individual	provides full results traceability. ‘As found’
Calibration technique	Individual Function and Range	Function and Range	data is difficult to determine using 3458/HFL
Calibration technique	calibration.	Function and Range	data is difficult to determine using 3458/HFL
	calibration.	calibration.	‘artifact’ calibration.
		calibration.	‘artifact’ calibration.
			Artifact calibration provides a low cost
			solution for adjustment.

8508A, 3458/HFL specifications

The Fluke 3458A and the Fluke 8508A are high-precision digital multimeters (DMM) designed for the most demanding applications in electrical measurement. Both of these instruments provide a plethora of features that make them indispensable tools for engineers, laboratories, and research institutions.

The Fluke 3458A is well-known for its exceptional accuracy and stability. It boasts a 7.5-digit display, offering an impressive resolution of 1 nV for voltage and 1 nA for current measurements. With an accuracy specification of 0.0005%, it can handle both AC and DC measurements with ease, making it suitable for calibrating other instruments and for use in environments where precision is crucial.

One of its standout features is its ability to perform automated measurements through a built-in interface. This feature is particularly useful in laboratory settings where repetitive measurements are common. It supports a variety of communication protocols such as USB, GPIB, and LAN, allowing seamless integration into automated test setups.

The Fluke 8508A, on the other hand, is renowned for its advanced measurement capabilities, including a high input impedance of 10 GΩ. This feature minimizes loading effects on circuits being tested, ensuring accuracy. The 8508A also provides extensive support for data logging, enabling users to capture trends over time.

With 9 different measurement functions, including resistance, capacitance, and frequency, the 8508A is versatile enough to address a wide array of testing needs. Its long-term stability is backed by a high-quality internal reference, ensuring reliable measurements over extended periods.

Both multimeters utilize cutting-edge A/D conversion technologies, such as dual-slope conversion for DC measurements, which significantly enhances accuracy and reduces noise. Furthermore, they are built with robust hardware that ensures durability, making them suitable for both laboratory and field applications.

In summary, the Fluke 3458A and Fluke 8508A DMMs are designed for high-precision measurement tasks. Their advanced features, exceptional accuracy, and innovative technologies make them leaders in the field of electrical metrology. Engineers and researchers can rely on these instruments for their measurement needs, confident in the quality and consistency they provide. Whether used in calibration labs or in complex scientific investigations, these DMMs represent the pinnacle of electrical measurement technology.