Rohde & Schwarz URE2 Voltmeter

The Rohde & Schwarz URE2 is a high-precision, broadband true RMS voltmeter for accurate voltage measurement across DC and AC signals spanning 10 Hz to 25 MHz. Built on a patented rectifier circuit with microprocessor-controlled auto-calibration, it delivers measurement speeds exceeding 30 measurements per second and accommodates signals with crest factors up to 7. The instrument measures voltages from 10 µV to 300 V AC and 50 µV to 300 V across its full range, with 1 MΩ input impedance and low input capacitance.

– Technical Specifications

• Measurement Type: True RMS for AC and AC + DC voltages
• Frequency Range: DC; 10 Hz to 25 MHz (up to 25 MHz for crest factor ≤ 7)
• Voltage Range: 10 µV to 300 V AC; 50 µV to 300 V (full range)
• Input Impedance: 1 MΩ common mode
• Measurement Speed: >30 measurements/second
• Display: 4.5-digit digital with analog bargraph and selectable scale

– Key Features

• Microprocessor-controlled auto-calibration with instrument-specific correction factors stored in non-volatile memory
• Selectable high-pass and low-pass filters for hum and high-frequency noise suppression
• Zero function to compensate inherent noise voltages at low signal levels
• Relative measurements including difference, ratio, dB, and percentage calculations
• Maxima/minima detection and tolerance limit determination
• Selectable readout units: Volts, Watts, dBV, dBµV, dBu, dBm
• Commercial probe compatibility with division factor correction
• Menu-guided operation via programmed and softkey controls

– Typical Applications

Laboratory characterization of broadband signals, industrial power quality measurement, field diagnostics of RF and audio circuits, and precision AC/DC voltage validation in demanding measurement environments.

– Compatibility & Integration

IEC bus (IEEE 488) interface with plain-text remote control commands compliant with IEC 625-2 standard enables integration into automated test systems.