Keithley 2182A Dual-Channel Nanovoltmeter + 6220 DC Current Source

Keithley 2182A Dual-Channel Ultra-Low Voltage Nanovoltmeter and 6220 Low Noise Precision DC Current Source.  Include accessories in the photos.  Units will be sold together as a set.

Product Overview

The two-channel Model 2182A Nanovoltmeter is optimized for making stable, low noise voltage measurements and for characterizing low resistance materials and devices reliably and repeatably. It provides higher measurement speed and significantly better noise performance than alternative low voltage measurement solutions.

The Model 2182A represents the next step forward in Keithley nanovoltmeter technology, replacing the original Model 2182 and offering enhanced capabilities including pulse capability, lower measurement noise, faster current reversals, and a simplified delta mode for making resistance measurements in combination with a reversing current source, such as the Model 6220 or 6221.

Reliable Results

Power line noise can compromise measurement accuracy significantly at the nanovolt level. The Model 2182A reduces this interference by synchronizing its measurement cycle to line, which minimizes variations due to readings that begin at different phases of the line cycle. The result is exceptionally high immunity to line interference with little or no shielding and filtering required.

Optimized for Use with Model 6220/6221 Current Sources

Device test and characterization for today’s very small and power-efficient electronics requires sourcing low current levels, which demands the use of a precision, low current source. Lower stimulus currents produce lower—and harder to measure—voltages across the devices. Linking the Model 2182A Nanovoltmeter with a Model 6220 or 6221 Current Source makes it possible to address both of these challenges in one easy-to-use configuration.

When connected, the Model 2182A and Model 6220 or 6221 can be operated like a single instrument. Their simple connections eliminate the isolation and noise current problems that plague other solutions. The Model 2182A/622X combination allows making delta mode and differential conductance measurements faster and with less noise than the original Model 2182 design allowed. The Model 2182A will also work together with the Model 6221 to make pulse-mode measurements.

The 2182A/622X combination is ideal for a variety of applications, including resistance measurements, pulsed I-V measurements, and differential conductance measurements, providing significant advantages over earlier solutions like lock-in amplifiers or AC resistance bridges. The 2182A/622X combination is also well suited for many nanotechnology applications because it can measure resistance without dissipating much power into the device under test (DUT), which would otherwise invalidate results or even destroy the DUT.

Features
2182A 2 Channel Nanovoltmeter
Make low noise measurements at high speeds, typically just 15nV p-p noise at 1s response time, 40–50nV p-p noise at 60ms
Delta mode coordinates measurements with a reversing current source at up to 24Hz with 30nV p-p noise (typical) for one reading. Averages multiple readings for greater noise reduction
Synchronization to line provides 110dB NMRR and minimizes the effect of AC common-mode currents
Dual channels support measuring voltage, temperature, or the ratio of an unknown resistance to a reference resistor
Built-in thermocouple linearization and cold junction compensation
Applications

Research
Determining the transitiontemperature of superconductive materials
I-V characterization of a material at a specific temperature
Calorimetry

Metrology
Intercomparisons of standard cells
Null meter for resistance bridge measurements

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Product Overview

The Model 6220 DC Current Source and Model 6221 AC and DC Current Source combine ease of use with exceptionally low current noise. Low current sourcing is critical to applications in test environments ranging from R&D to production, especially in the semiconductor, nanotechnology, and superconductor industries. High sourcing accuracy and built-in control functions make the Models 6220 and 6221 ideal for applications like Hall measurements, resistance measurements using delta mode, pulsed measurements, and differential conductance measurements.

The need for precision, low current sourcing. Device testing and characterization for today’s very small and power-efficient electronics requires sourcing low current levels, which demands the use of a precision, low current source. Lower stimulus currents produce lower—and harder to measure—voltages across the device. Combining the Model 6220 or 6221 with a Model 2182A Nanovoltmeter makes it possible to address both of these challenges.

Features

Source and sink (programmable load) 100fA to 100mA
1014W output impedance ensures stable current sourcing into variable loads
65000-point source memory allows executing comprehensive test current sweeps directly from the current source
Built-in RS -232, GPIB, Trigger Link, and digital I/O interfaces
Reconfigurable triax output simplifies matching the application’s guarding requirements
Model 220 emulation mode eliminates need to reprogram existing applications