In summary, the Keithley 2002/MEM2 is an 8.5-digit high-performance digital multimeter that delivers metrology-class accuracy at a fraction of the price of comparable instruments. It is based on the same measurement technology as the 7.5-digit 2001, but extends resolution and accuracy specifications for production test, design verification, and metrology applications where the highest accuracy is critical. The /MEM2 configuration ships with extended 128K reading memory.

What is the Keithley 2002/MEM2 used for?

The 2002 is used in calibration laboratories, metrology benches, and high-end production test where the resolution and accuracy of an 8.5-digit DMM are required. Common applications include DCV transfer measurements against standard cells, precision resistor characterization, low-frequency AC measurement, and any application where the measurement floor is set by the DMM's own noise and accuracy.

How does the 2002's 4-wire ohms method differ?

The 2002 uses a single-phase technique for 4-wire ohms measurement, which is twice as fast for a given power-line cycle rate as conventional DMMs. It also eliminates errors caused by changing lead resistance from fast test handlers, and includes built-in open-lead detection that eliminates many production-test problems.

Factual grounding — DCV transfer accuracy

Entity authority

The 2002 sits in the same metrology tier as the HP/Agilent 3458A and is the standard 8.5-digit Keithley DMM in calibration laboratories. The 3458A emulation mode allows the 2002 to drop into existing 3458A-controlled metrology systems with minimal code change.

Applications

• Calibration laboratories — ISO 17025 verification of precision sources
• Standard-cell comparisons and DCV transfer measurements
• Precision resistor characterization at ppm-level accuracy
• Low-frequency AC measurement for vibration and control work
• Peak-spike capture, frequency counting, and temperature measurement

Accessories Supplied

Product Core and Specifications

Like the 2001, the 2002 uses a 28-bit A/D and a patented AC measurement circuit that bypasses the prime error-contributing section of conventional RMS converters. The 2002 extends the 2001's resolution by an extra digit, sharpens 4-wire ohms speed and accuracy, and adds support for SPRTs (Standard Platinum Resistance Thermometers) to ITS-90 in addition to thermocouples and 100 Ω platinum RTDs.

AC voltage performance

Resistance, current, and frequency

General

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