Fluke 2640A NetDAQ Networked Data Acquisition Unit

The Fluke 2640A NetDAQ is a networked data acquisition unit for industrial and laboratory process monitoring, test systems, and quality control applications. It integrates into Ethernet networks or operates standalone, acquiring analog measurements across up to 20 channels with multi-slope ADC conversion and 5 ½ digits of resolution. The unit supports computed channels for mathematical operations and delivers readings up to 100 per second nominal, with expandability to 400 channels through unit interconnection.

– Technical Specifications

Analog Acquisition
• 20 analog input channels (expandable to 400 channels via multiple units)
• 10 computed channels supporting addition, subtraction, multiplication, division, log, natural log, exponent, square root, absolute value, integer function, and averaging
• 8 digital I/O and alarm outputs
• 1 totalizer channel
• Multi-slope ADC, linear to 18 bits
• 0.3 µV and 0.02°C resolution
• Up to 100 readings per second nominal (selectable rates: 6 rps slow, 41–48 rps medium, 143 rps fast)

Input Specifications
• Maximum measurement input: 300 V
• Normal mode: 150 VDC/VAC rms (channels 1–11); 300 VDC/VAC rms (channels 1, 11)
• Common mode: 300 VDC/VAC rms (channels 1, 11); 150 VDC/VAC rms (all others)
• Input overload protection: 1600 V
• Common mode rejection: ≥120 dB (AC and DC)
• Normal mode rejection: 50 dB @ 50/60 Hz

Measurement Capabilities
• DC volts: 90 mV to 300 V; 0.01% accuracy (3-Sigma)
• AC volts: 300 mV to 300 V; 0.3% accuracy (3-Sigma)
• Resistance: 300 Ω to 10 MΩ; ±0.015% accuracy (3-Sigma)
• Frequency: 15 Hz to 1 MHz; ±0.05% accuracy (3-Sigma)
• RTD (Pt 100): −200 to 600°C; ±0.06°C accuracy (3-Sigma)
• Thermocouple (J, K, T types): −100 to 1372°C range; 0.3–0.4°C accuracy (3-Sigma)

– Key Features

• Network integration with standalone operation capability
• Channel expansion without internal card swaps
• High-accuracy DC measurement at 0.01% (3-Sigma)
• Wide thermocouple range support (J, K, T types)
• High common-mode rejection (120 dB) for noise immunity

– Typical Applications

Process monitoring and quality control in manufacturing; temperature profiling in thermal testing; multi-point voltage and resistance logging; frequency measurement and analysis; research and development data acquisition.

– Compatibility & Integration

Networked operation over Ethernet with standalone system configuration. Multiple units interconnect for expanded channel capacity to 400 channels total.