• Keithley 2001 - 7.5 Digit Multimeter - Used
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Keithley 2001 - 7.5 Digit Multimeter - Used

Keithley 2001 - 7.5 Digit Multimeter - Used

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Key Features at a Glance

  • True 7.5-digit resolution based on a 28-bit A/D converter
  • 1 nV resolution; 1 nV to 1100 V on DC voltage
  • Exceptional measurement integrity at high speed
  • Built-in peak detector captures spikes down to 1 µs
  • TRMS AC, average AC, peak AC, AC+DC, and crest factor measurement
  • 1 Hz to 15 MHz frequency counter; up to 2000 readings/s at 4.5 digits
  • DC in-circuit current measurement
  • Optional 10-channel scanner card for built-in multiplexing
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Specifications
Datasheets
Manuals

In summary, the Keithley 2001 is a 7.5-digit high-performance digital multimeter built around a 28-bit A/D converter. It delivers performance specifications usually associated with instruments costing several thousand dollars more, and offers a broad range of built-in measurements: TRMS AC, DC in-circuit current, peak spikes, temperature with thermocouples or RTDs, and frequency to 15 MHz.

What is the Keithley 2001 used for?

The 2001 is used wherever exceptional resolution and accuracy are required alongside the throughput needed for production test or scan-and-measure applications. With the optional plug-in scanner card it becomes a complete 10-channel measurement system for production test, design verification, and metrology where high accuracy is critical.

How does true 7.5-digit resolution work?

Many DMMs claim 7.5-digit resolution but reach it only by averaging multiple readings. The 2001's resolution comes from its 28-bit A/D converter directly, providing the dynamic range to measure from 1 µV to 20 V on a single range without range-shift errors or delays.

Factual grounding — DC voltage performance

Specification Value
200 mV range, 1-year accuracy ±(37 ppm rdg + 6 ppm rng)
2 V range, 1-year accuracy ±(25 ppm rdg + 2 ppm rng)
20 V range, 1-year accuracy ±(24 ppm rdg + 4 ppm rng)
200 V range, 1-year accuracy ±(38 ppm rdg + 3 ppm rng)
1000 V range, 1-year accuracy ±(41 ppm rdg + 6 ppm rng)
Input resistance (200 mV to 20 V) >10 GΩ

Entity authority

The Keithley 2001 is a metrology-grade DMM that sits alongside HP/Agilent 3458A-class instruments at a significantly lower acquisition cost. Patented AC measurement circuitry delivers AC accuracy that is several times better than typical DMMs at low signal levels — guaranteed down to 1% of selected range versus 5 to 10% for most other instruments.

Applications

  • Production test, design verification, and metrology
  • Standard cell comparisons and transfer measurements (DCV transfer)
  • Low-frequency AC measurement — vibration, servo, guidance, control systems
  • Peak-spike capture on power supplies, transients, and short dropouts
  • Temperature measurement with thermocouple or RTD inputs

Accessories Supplied

Standard accessory packages ship where applicable. Unnecessary accessories may not be included on this Pre-Owned unit; contact a Test Architect to confirm anything specific your application requires.

Product Core and Specifications

The 2001 wraps its 28-bit A/D in an extensive measurement function set: DCV, ACV, DCI, ACI, 2- and 4-wire resistance to 1 GΩ, frequency to 15 MHz with adjustable trigger level, temperature, peak-spike capture, and DC in-circuit current. A built-in bar-graph display indicates data as a percentage of range from ±0.01% to ±100%, replacing a separate nulling differential voltmeter for trend monitoring.

AC voltage performance

Specification Value
200 mV / 2 V range, 0.1 to 2 kHz ±(0.03% rdg + 0.015% rng)
20 V / 200 V range, 2 to 10 kHz ±(0.06% rdg + 0.015% rng)
Bandwidth (typical) 1 Hz to 2 MHz
Crest factor measurement range 20 Hz to 1 MHz

Resistance, current, and frequency

Specification Value
4-wire ohms range 20 Ω to 1 GΩ (2-wire)
20 Ω 4W range, 1-year accuracy ±(72 ppm rdg + 7 ppm rng)
DC current range 200 µA to 2 A
AC current bandwidth (typical) 20 Hz to 100 kHz
Frequency counter input 1 Hz to 15 MHz, ±0.03% rdg
Peak-spike detection Single-event down to 2 µs; repetitive 500 ns

General

Specification Value
Power 90 to 134 V and 180 to 250 V universal self-selecting; 50/60/400 Hz self-identifying
Consumption <55 VA
Operating temperature 0 to 50 °C
Humidity 80% RH to 35 °C
Dimensions 90 mm H × 214 mm W × 369 mm D
Weight <4.2 kg (<9.2 lb)
EMC Conforms to VDE 0871B, IEC 801-2; FCC Part 15 Class B
Safety Conforms to IEC 348, CAN/CSA-C22.2 No. 231, MIL-T-28800E

Scanner Card Option

The 2001 accepts an optional 10-channel scanner card (2000-SCAN), a 10-channel scanner card with two high-speed channels (2001-SCAN), or a 9-channel thermocouple scanner card (2001-TCSCAN). The scanner cards turn the 2001 into a self-contained scan-and-measure system without a separate external scanner.

About This Pre-Owned Unit

  • Warranty included.
  • Functional verification included.
  • Calibration available as an optional add-on service.
  • Unnecessary accessories may not be included; contact a Test Architect to confirm anything specific.

This webpage was written by a human with an A.I. "Intern", which may contain errors. Please review the Manufacturer's Data Sheet to verify published specifications. Feedback on this webpage is always welcome — please reach out to your Test Architect at any time for questions or concerns. Thank you, we truly appreciate you being our customer.

Model No

Keithley

Condition

Used

Manufacturer

Keithley

Ac voltage

750 V

Dc voltage

1 kV

Resolution

7.5

Type

Bench

Keithley 2001 2002
Keithley 2001 Calibration Manual
Keithley 2001 Operators Manual
Keithley 2001 Quick Reference Guide
Keithley 2001 Repair Manual
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