Description

The HP E1406A (now Keysight Technologies) is a high-precision 6½-digit digital multimeter (DMM) module designed for VXIbus-based test and measurement systems. As part of Hewlett-Packard’s legacy VXI instrument family, this module delivers laboratory-grade accuracy in a compact, rack-mountable form factor ideal for automated test equipment (ATE) and industrial monitoring applications. The HP E1406A provides DC voltage/current, AC voltage/current, 2-wire/4-wire resistance, frequency, and diode testing capabilities with exceptional stability (±0.0024% DCV accuracy). Its integration into VXI mainframes (e.g., HP E8400 Series) enables centralized data acquisition in manufacturing test racks, power supply validation benches, and calibration systems. With built-in triggering and scan-list sequencing, the HP E1406A automates complex measurement tasks while its optical isolation prevents ground loops in noisy industrial environments. Though discontinued, it remains critical in legacy aerospace, energy, and semiconductor test platforms where measurement traceability is paramount.

HP E1406A

Technical Specifications

Main Features and Advantages

Metrology-Grade Precision: The HP E1406A achieves ±0.0024% DCV accuracy through proprietary auto-calibration and oven-controlled voltage references. Its 4-wire resistance measurement eliminates lead resistance errors for critical applications like shunt calibration or RTD validation.

Automation Capabilities: Programmable scan lists support up to 100 channels with independent range/config per channel. Backplane triggering synchronizes measurements with other VXI instruments (e.g., scanners, counters). SCPI command compatibility enables seamless integration with TestExec SL or LabVIEW.

Robust Industrial Design: Optical isolation withstands 300V common-mode noise – essential for motor test stands with variable frequency drives. Guarded inputs reduce leakage currents during high-impedance measurements. The module’s fanless construction ensures vibration-free operation in metrology labs.

Application Field

The HP E1406A excels in high-accuracy automated testing systems. In aerospace manufacturing, it validates avionics power supply ripple (<5>

For energy infrastructure, the module calibrates protective relays and revenue-grade meters in substation test benches. Its 4-wire ohms capability ensures precise PT100 RTD simulation for turbine temperature monitoring. In automotive ECU production, the HP E1406A performs end-of-line functional tests on engine control units, verifying analog input thresholds with ±1 ppm resolution. Legacy nuclear power plants leverage its radiation-hardened variants for fuel rod resistance mapping.

Related Products

HP E1412B: 64-channel multiplexer for DMM expansion

HP E8401A: VXI Mainframe with 13-slots

HP E1328A: 9-digit voltmeter for ultra-high precision

Keysight 34465A: Modern 6½-digit benchtop DMM replacement

HP E1476A: Relay actuator module for test sequencing

HP E1420B: Quad power supply for ATE systems

HP E1405A: Counter/timer module for frequency validation

Keysight VXI-MIO: Modular I/O for hybrid systems

HP E1406A

Installation and Maintenance

Pre-installation preparation: Verify VXI mainframe slot compatibility (C-size). Ground mainframe chassis to <1>

Maintenance recommendations: Perform internal self-calibration monthly using CAL? 0 command. Clean input terminals with isopropyl alcohol to maintain contact resistance. Monitor internal temperature via *TST? query – sustained >50°C requires cooling optimization. Replace electrolytic capacitors every 8-10 years to prevent power rail degradation. For critical measurements, validate against NIST-traceable standards annually.