The Fluke 5790A Wideband AC Measurement Standard with Option 3 is a precision thermal transfer standard engineered for advanced calibration labs and metrology environments. It delivers true RMS AC voltage measurement with uncertainties as low as ±24 ppm, combining the accuracy of thermal conversion technology with digital display convenience. This instrument automatically detects and measures AC or DC voltages, performs AC/DC transfer calculations, and extends measurement capability to 30 MHz with dedicated wideband inputs—making it the primary choice for verifying precision calibrators and performing high-frequency AC voltage transfer work.
Technical Specifications
Voltage Measurement
• Range: 700 µV to 1000 V AC
• Minimum voltage in transfer mode: 70 mV
• Wideband measurement range: 700 mV to 7 V
Frequency
• Standard range: 10 Hz to 1 MHz
• Wideband option: 10 Hz to 30 MHz
• Frequency accuracy (10–120 Hz): 100 ppm + 10 digits
• Frequency accuracy (>120 Hz): 100 ppm + 2 digits over 0°C to 50°C
Accuracy
• Absolute AC voltage uncertainty: ±24 ppm (one year, 23°C ±5°C)
• Wideband measurement (1 year): ±0.35%
• Volt-Hertz product: 1 × 10⁸
• Input protection: 1200 V on all voltage ranges
– Key Features
• Solid-State Thermal RMS Sensor with excellent signal-to-noise characteristics and minimal reversal errors
• Hermetically sealed thin-film resistor networks for reduced AC measurement error
• Automatic AC/DC voltage detection and switching with direct difference display
• Dual measurement inputs: Type-N connectors and five-way binding posts for voltage and current shunt compatibility
• Vacuum fluorescent display for clear readout under all conditions
• IEEE-488 (GPIB) automation interface
– Typical Applications
AC voltage calibration and verification of Fluke 5700A, 5500A, and 5100 Series calibrators. Wideband frequency testing up to 30 MHz. AC/DC transfer measurements using external DC sources or standalone operation. Verification of precision AC voltmeters and transfer standards. Compatible with Fluke 5725A and 5205A/5215A amplifiers for extended measurement capability.
– Compatibility & Integration
Designed to verify AC voltage and wideband performance of primary Fluke calibrator lines. Supports Fluke A40 and A40A current shunts for AC/DC current transfer measurements. Connects via Type-N or binding posts to external amplifiers and current measurement accessories.
