Fluke 732A – DC Voltage Reference Standard

The Fluke 732A DC Voltage Reference Standard is a precision solid-state instrument engineered as a direct replacement for saturated standard cells in calibration and metrology applications. It delivers superior resolution, lower noise, and simplified operation compared to legacy references. The unit combines exceptional long-term stability with flexible power architecture—supporting AC line voltage, internal rechargeable battery, or external DC/AC sources—enabling reliable operation in laboratory and field environments. All outputs feature short-circuit protection with 2-minute recovery, and the instrument is rated for direct air or ground shipment without special handling requirements.

– Technical Specifications

• Voltage Outputs: 10 V DC, 1.018 V DC, 1 V DC
• Stability: 0.5 ppm per 30 days (10 V output)
• Output Adjustments: 50 µV (10 V and 1.018 V ranges); 5 µV (1 V range)
• Output Impedance: 1 MΩ (10 V); 1 kΩ (1 V and 1.018 V)
• Output Current: ~12 mA maximum at 10 V output
• Short-Circuit Protection: All outputs indefinitely protected; recovery within 2 minutes without stability loss

– Key Features

• High thermal gain oven design stabilizes reference amplifier and output divider
• Internal rechargeable battery supports 12 hours operation; extends to ~72 hours with optional battery packs
• Power sources: 100/120/220/240 VAC (±10%, 50–400 Hz), 24–40 VAC/DC external, or internal battery
• Constant current/constant voltage battery charger prevents overcharging
• Continuous operation maintained during AC or battery power transitions
• Operating range: 23°C ±5°C for full accuracy
• Front-panel status LEDs: AC Power, Battery Charging, In Calibration
• Half-rack width; 4 standard rack spaces; 27 lb

– Typical Applications

• Precision calibration of digital multimeters and voltmeters
• Metrology lab voltage standards and transfer standards
• Field verification and portable reference measurements

– Compatibility & Integration

Front-panel binding posts provide independent access to all three voltage outputs. Oven temperature monitoring terminals available for external thermal tracking.