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Fluke 5790B AC Measurement Standard


Precision ac voltage and current measurements have never been this easy

The 5790B AC Measurement Standard is a multi-purpose ac measurement and transfer standard designed for the most demanding calibration applications. It combines the accuracy you would expect from a thermal transfer standard with the ease of use of a digital multimeter. Absolute ac voltage measurement uncertainties are as low as ± 24 ppm (one year, 23 °C ± 5 °C). The 5790B is designed to meet the complete ac voltage, ac current and wideband verification requirements of the Fluke Calibration 5735A, 5720A, and 5700A Multifunction Calibrators; 5522A, 5502A, 5520A, and 5500A Multi-Product Calibrators; plus other calibrators, amplifiers like the 52120, 5725A and 5205A/5215A, and transfer standards and ac voltmeters.

The 5790B covers an alternating voltage range of 600 μV to 1000 V, and a frequency range of 10 Hz to 1 MHz. Wideband voltage options extend frequency range to 30 or 50 MHz.



Summary Specifications

AC and dc voltage Best 99%, absolute specification : ± 24 ppm (one year, 23 °C to ± 5°C

Input 1: 600 µV to 1000 V (5% over-range)

Input 2: 600 µV to 1000 V (5% over-range)

Aux input: 250 mV to 500 mV

WB input: <7 V rms wideband

Warm-up time 30 minutes
Relative humidity

Operating: 45% to 50 °C 75% to 45 °C 95% to 30 °C

Storage: <95% non-condensing


Operating: 3,050 meters (10,000 feet)

Non-operating: 12,200 meters (40,000 feet)


Operating: 0 °C to °50 C

Calibration: 15 °C to 35 °C

Storage: -40 °C to 70 °C

Electromagnetic Compatibility (EMC)

International IEC 61326-1: Controlled Electromagnetic Environment - CISPR 11: Group 1, Class A
Korea (KCC) Class A Equipment (Industrial Broadcasting & Communication Equipment)
USA (FCC) 47 CFR 15 subpart B. This product is considered an exempt device per clause 15.103.
Surge ANSI C62.41-1980, Category A
Reliability MIL-T-2880D, paragraph 3.13.3

General Specifications


Height: 17.8 cm (7 in) standard rackmount + 1.5 cm (0.6 in)

Width: 43.2 cm (17 in)

Depth: 62 cm (24.8 in)

Maximum power requirements

5790B: 100 VA


5790B: 24 kg (53 lb)

With wideband: 24.5 kg (54 lb)

Line power

50 Hz or 60 Hz; 100 V - 120 V, 220 V - 240 V

100V, 110 V, 115 V, 120 V, 200 V, 220 V, 230 V, 240 V

Safety Complies with UL1244 and IEC 348-1976 and IEC 1010 and CSA C22.2 No. 231 and ANSI/ISA S82
Remote interfaces RS-232, IEEE-488
Confidence level 99% unless otherwise specified


  The 5790B/AF has enhanced absolute accuracy to ± 0.23 % of voltage (1 year after factory calibration, 23 °C ± 3 °C, at 95 % confidence level) at 50 MHz and 223.61 mV, using a serialized one meter cable, characterized at that point for RF power meter 0 dBm reference output measurement. In the RF power measurement mode, the accuracy is specified to the end of the serialized cable with a curve fit for the other ranges and frequencies that is a first order correction for cable loss.  










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