Valhalla Scientific 2575A AC/DC Active Current Shunt

Overview

The Valhalla Scientific 2575A is a precision AC/DC active current shunt designed for both AC and DC current measurement up to 100 amps and as a laboratory standard for low-level resistance calibration. The instrument features six independent switch-selectable ranges from 1 milliamp to 100 amperes, with non-inductive resistance elements ensuring flat frequency response to 10 kHz for accurate AC measurements.

Key Features

• AC and DC current measurement from 1 mA to 100 A full scale
• Six independent switch-selectable measurement ranges
• 100% overrange capability on all ranges except 100 A
• Non-inductive resistance elements for flat frequency response to 10 kHz
• Fan-cooled high-current shunt resistors for minimal heat rise and thermal stability
• Built-in precision gain 10 chopper stabilizer buffer amplifier
• Four-terminal resistance measurements from 0.001 ohm to 100 ohms
• 100 mV full-scale voltage drop at rated current
• Amplifier gain accuracy of ±0.01% with 10 µV RTI at DC
• Frequency response ±0.1% to 10 kHz
• Temperature coefficient less than 0.001% per °C

Applications

• Precision AC/DC current measurement in laboratory environments
• Low-level resistance calibration and standards
• Power supply testing and characterization
• Current shunt calibration and verification