Agilent / Keysight E1412A 6.5-Digit High-Accuracy Multimeter C-Size

The Agilent/Keysight E1412A is a C-size VXI multimeter module delivering 6.5-digit resolution for high-precision automated test environments. Built on a multi-slope III A/D converter architecture, it executes DC and AC measurements with exceptional accuracy while maintaining rapid configuration switching - 30 function changes per second and 65 range changes per second. The module integrates 1000-reading internal memory at 4.5-digit resolution and supports dual input impedance modes (10 MΩ / 10 GΩ switchable on DC voltage).

Advanced math functions including NULL, MIN/MAX, LIMIT, dB, and dBm calculations enable complex pass/fail assessments with TTL output signaling.

Technical Specifications

Measurement Functions

• DC Voltage, AC Voltage (True RMS, up to 5:1 crest factor)


• DC Current (up to 3 A), AC Current (up to 3 A, True RMS)


• 2-wire and 4-wire Resistance (up to 100 MΩ)


• Frequency (up to 300 kHz), Period Resolution & Accuracy

6.5-digit resolution. DC voltage accuracy reaches ±0.0019% (24-hour, 23°C ±1°C) on optimized ranges; typical performance spans ±(0.0030% of reading + 0.0030% of range) at 100 mV to ±(0.0020% of reading + 0.0018% of range) at 300 V. AC voltage operates 3 Hz to 300 kHz; 300 Vac limited to 50 kHz. Frequency measurement uses reciprocal counting with gate times from 10 ms to 1 s; signal settling requires up to 1 second. Input Characteristics
DC voltage input impedance switches between 10 MΩ and 10 GΩ. AC voltage impedance rated 10 MΩ || <100 pF. Input bias current below 30 pA. Overrange capability is 20% on most ranges; 300 Vac and 3 A ranges support 1% overrange. All ranges protected at 300 V with externally accessible current measurement fuses. Data Acquisition
Measurement speed of 1000 readings/s into internal memory at 4.5-digit resolution. One-hour warm-up required for calibration specifications.

Key Features

• Switchable input impedance (10 MΩ / 10 GΩ) for measurement flexibility


• Low input bias current (<30 pA) minimizes circuit loading


• 4-wire resistance without external NULL calculation adds only 0.2 Ω error versus 2-wire methods


• TTL limit-check outputs for automated test decision logic


• Buffered data storage supports high-speed continuous acquisition

Typical Applications Component characterization, precision calibration verification, mixed-signal circuit validation, and production test environments demanding 6.5-digit resolution with VXIbus integration.

Compatibility & Integration Designed as a 1-slot message-based VXI module, the E1412A integrates directly into VXIbus mainframes and controller systems supporting standard VXI command protocols.