Fluke 8400A/FM

The Fluke 8400A is a 5½-digit precision digital voltmeter engineered for systems integration and laboratory measurement applications. This benchtop instrument delivers DC voltage measurements across five ranges from ±0.1 V to ±1000 V with 1 µV sensitivity and exceptional 0.002% basic DC accuracy. The design leverages Fluke’s Recirculating-Remainder A/D conversion technique to ensure high long-term accuracy, superior linearity, and reliable environmental stability.

## Technical Specifications

• Display: 5½ digits
• DC voltage ranges: ±0.1 V to ±1000 V (five ranges)
• Sensitivity: 1 µV
• Basic DC accuracy: 0.002%
• Common mode rejection (DC): 140 dB
• Input resistance (DC, 0–500 V): Infinite at null
• Input resistance (AC): 1 MΩ, 35 pF (500 V and 50 V ranges); 1 MΩ, 50 pF (5 V and 0.5 V ranges)
• Conversion technique: Recirculating-Remainder A/D
• Weight: 16 lbs

## Key Features

• Standard cell reference; optional Zener diode reference (AG suffix)
• Benchtop form factor with compact footprint
• Systems-oriented architecture for measurement system integration
• Optional remote control and printer output
• Optional low-capacity probe for specialized measurements

## Compatibility & Integration

The 8400A integrates into larger measurement systems via optional remote control and data output capabilities. Rack-mounting kits—including the 881A-103 dual mounting kit and 881A-102 single mounting kit—enable vertical integration into standard 19-inch racks. Multiple optional add-ons expand functionality based on application-specific requirements.