Keithley 196 6.5 Digit Digital Multimeter

The Keithley 196 is a 6.5-digit autoranging digital multimeter engineered for precision DC and AC measurements across voltage, current, and resistance. It delivers 100 nV resolution on the 300 mV range and typical DC voltage accuracy of 0.0013% + 10 counts, making it suitable for both benchtop and automated test system integration. The instrument combines a 10-character alphanumeric LED display with up to 1000 readings per second measurement rate and onboard storage for 500 readings. Full IEEE-488 programmability enables remote control and data retrieval, while a weighted average digital filter and exceptional common mode rejection (>110 dB at DC) ensure clean, reliable measurements in demanding environments.

## Technical Specifications

**Measurement Functions**
• DC Voltage: 300 mV to 300 V, 100 nV resolution, ±0.0013% + 10 counts accuracy (3V range)
• True RMS AC Voltage: 300 mV to 300 V, 1 µV resolution, ±(0.01% + 0.01 dB) accuracy, 300 kHz bandwidth, 3:1 crest factor
• DC Current: 300 µA to 3 A, 1 nA resolution, 3A fuse protection (250V)
• True RMS AC Current: 300 µA to 3 A
• Resistance: 300 Ω to 300 MΩ, 100 µΩ resolution, ±0.0020% + 2 counts accuracy (300Ω range), 5.5V max open circuit voltage

**Performance Metrics**
• Measurement rate: Up to 1000 readings/second
• Analog settling time: <1 ms (110 dB at DC, 50/60 Hz with 1 kΩ source imbalance
• NMRR: >60 dB at 1 kHz and 60 Hz
• Temperature coefficient: <±(0.1 × accuracy)/°C below 20 kHz; ±(0.2 ×) from 20 kHz to 100 kHz
• Input impedance (DC voltage): 10 MΩ shunted by <120 pF
• Display resolution: ±3,030,000 counts (6.5 digits)

## Key Features

• 10-character alphanumeric 14-segment LED display
• Data memory: 500 readings via IEEE-488 bus
• Programmable digital calibration from front panel or remote interface
• Configurable weighted average digital filter

## Interfaces & Integration

• IEEE-488 (GPIB) interface for full programmability
• Support for MULTILINE (OCL, LLO, SOC, GET, GTL, UNT, UNL, SPE, SPD) and UNILINE (Fe, REN, EOI) commands
• Rear-panel accessible fuse

## Typical Applications

Precision component characterization, calibration labs, automated test systems, semiconductor parametric measurements, and long-term data logging.