The HP/Agilent 44702A is a high-speed voltmeter module engineered for rapid DC voltage and resistance measurements within the HP 3852A Data Acquisition/Control Mainframe ecosystem. Capable of acquiring up to 100,000 readings per second with 13-bit resolution, this instrument delivers the throughput and precision required for demanding R&D, manufacturing, and test applications. The module supports auto-ranging across multiple voltage scales, maintains an 8,000-reading buffer, and accommodates external current measurement via shunt configuration.
Technical Specifications
Measurement Functions
• DC Voltage and DC Resistance (primary)
• Current measurements with external shunt
• Strain and temperature via appropriate transducers
Performance
• Maximum reading rate: 100,000 readings/second (13-bit, 14-bit, and 16-bit modes)
• Resolution: 13-bit
• Data buffer: Over 8,000 readings
• DC voltage accuracy (2.56 V range): ±(0.05% + 1.88 mV)
• DC voltage accuracy (3 V range): ±(0.015% + 340 µV)
• Auto-ranging supported; signal slew rate must not exceed 600 V/second during range transitions
Electrical Characteristics
• Maximum input voltage (all inputs): 16 V peak
• Mode voltage: 100 V
• Current source compliance voltage (resistance function): Minimum 17 V
• Maximum bias current: ±1.4 nA DC (0° to 28°C); +18 nA DC (28° to 55°C)
• Bandwidth (0.1% flatness): 10 kHz (40 mV range); 15 kHz (320 mV to 10.24 V ranges)
• Bandwidth (1.0% flatness, -3 dB): 45 kHz (40 mV range); 55 kHz (320 mV to 10.24 V ranges)
• Common mode rejection: 90 dB at 40 mV range; 80 dB at 320 mV range; 70 dB at 2.56 V range
• Operating temperature: 0°C to 55°C
• Calibration warm-up: One hour minimum; auto-zeroing within one minute
– Key Features
• Plug-in architecture for mainframe integration
• 8,000-reading onboard storage for unattended data logging
• Configurable 2-wire or 4-wire resistance measurement
• Temperature coefficient compensation for measurements outside 18°C to 28°C nominal range
• Input protection to 16 V peak across all terminals
– Compatibility & Integration
Designed as a plug-in module for HP 3852A mainframes and compatible extenders. Operates on ribbon, rear, and back-plane connections.
