Fluke 343A DC Voltage Calibrator

The Fluke 343A DC Voltage Calibrator is a precision instrument that generates stable, accurate DC voltage outputs for calibrating DC voltage measurement devices in laboratory and field environments. This 7-digit calibrator delivers outputs from 0 to 1100 VDC with 0 to 25 mA current capability, featuring 0.1 ppm resolution and basic accuracy of 20 ppm over 90 days. Remote sense terminals allow direct voltage sensing at the load, while continuously variable current limiting (1–30 mA) with front-panel indication ensures safe operation across diverse test scenarios.

Technical Specifications

• Output voltage: 0–1100 VDC


• Output current: 0–25 mA (continuously variable limiting 1–30 mA)


• Resolution: 0.1 ppm overall; 1 µV (10 V range), 10 µV (100 V range), 100 µV (1000 V range)


• Basic accuracy (90 days): 20 ppm; 10 V range ±0.002% of setting or ±0.0002% of range; 100 V and 1000 V ranges ±0.002% of setting or ±0.0001% of range


• Ripple and noise: < 50 µV rms


• Short-term jitter: < 1 ppm


• Temperature coefficient: ±(3 ppm of setting + 0.1 ppm of range + 2 µV)/°C (15–35°C); ±(5–8 ppm of setting + 0.1 ppm of range + 2 µV)/°C (0–50°C)


• Line and load regulation: < 0.0005% of setting + 25 µV for 10% line change or full-load to no-load


• Settling time: Within 15 ppm of final output in 5 seconds


• Isolation: Floatable to 500 VDC from chassis


• Operating temperature: 0–50°C


• Dimensions: 8.9 cm H × 43.2 cm W × 45.7 cm D


• Weight: 10.43 kg


• Input power: 115 or 230 VAC ±10%, 50–440 Hz, ~60 VA fully loaded

Key Features

• Front-panel meter switchable between voltage (full range) and current (full range) display


• Remote sense terminals for direct load-point voltage measurement


• Current-limit indicator lamp


• NIST/NBS-traceable accuracy specifications

Typical Applications DC voltmeter and multimeter calibration; precision voltage source validation; laboratory standards; field equipment qualification.

Compatibility & Integration MIL, ANSI/IEEE, RTCA/DO-160, IEC CISPR, EN, and ISO standards.