The Keysight/Agilent/HP 44701A is a precision integrating voltmeter module designed for plug-in integration into 3852A and 3853A data acquisition mainframes. It delivers DC voltage, AC voltage, and resistance measurements with selectable resolution from 5½ to 3½ digits and scan rates up to 1600 readings/second. The integrating measurement architecture provides optimized normal mode noise rejection and enhanced common mode rejection via guard terminal, making it ideal for low-level signal measurement in high-noise environments.
– Technical Specifications
DC Voltage
• Ranges: 30 mV, 300 mV, 3 V, 30 V, 300 V
• Best accuracy: ±(0.008% + 8 µV) on 3 V range
AC Voltage
• Ranges: 200 mV, 2 V, 20 V, 200 V
• Accuracy: 0.5%
Resistance
• Ranges: 30 Ω, 300 Ω, 3 kΩ, 30 kΩ, 300 kΩ, 3 MΩ
• Accuracy: 0.015%
• Supports 2-wire and 4-wire ohms configurations with offset compensation
Integration Time: 0.0005 to 16 power line cycles (variable)
Maximum Input Voltage: 350 Vpeak or 250 Vdc between any two points
– Key Features
• Variable integration time enables trade-offs between measurement speed and noise rejection
• Autozero enabled across all measurement types
• Compatible with 447XX series multiplexers for expanded channel capacity
• Rear panel terminals for AC/DC voltage and 4-wire ohms measurements
• DC current, AC current, strain, and temperature measurements possible with external shunt resistors and appropriate accessories
– Compatibility & Integration
Designed as a plug-in module for Keysight/Agilent/HP 3852A and 3853A mainframes. Supports up to 25 channels in certain configurations. Systems can expand to 1848 differential channels or 4620 single-ended channels maximum.
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