Fluke 2625A HYDRA Series II Datalogger

The Fluke 2625A HYDRA Series II is a 21-channel data acquisition and logging system engineered for industrial and laboratory environments requiring simultaneous multi-parameter measurement. It acquires DC voltage, AC voltage, temperature via thermocouple (J, K, N, E, T, R, S, B, C) and RTD inputs, resistance, and frequency data across front-panel and rear-module channels. The removable Universal Input Module enables rapid reconfiguration without external signal conditioning, while automatic thermocouple reference junction compensation operates via the isothermal block temperature sensor.

– Technical Specifications

Measurement Channels & Input:
• 21 analog input channels total (Channel 0 front panel; Channels 1–20 rear module)
• Removable Universal Input Module with integrated signal conditioning
• Supported thermocouple types: J, K, N, E, T, R, S, B, C

Data Acquisition Performance:
• Fast rate: 17 readings/second nominal
• Slow rate: 4 readings/second nominal
• Continuous, interval, single, and triggered (internal/external) scan modes
• Single-channel monitoring during multi-channel scanning

Memory & Data Storage:
• Non-volatile memory: 2047 scans across up to 21 channels (~42,987 total readings)
• Stores minimum, maximum, and most recent measurements per channel
• Configuration and calibration data retention
• Memory life: ≥10 years minimum

Environmental & Power:
• Operating temperature: 0°C to 60°C (≤90% RH at 0–28°C)
• AC or DC powered
• Automatic data recovery and resume on power restoration

– Key Features

• Automatic thermocouple reference junction compensation
• Flexible data retrieval via modem, RS-232 to PC, or direct upload
• Portable form factor for field and bench deployment
• Power-loss resilience with configuration retention

– Typical Applications

Process monitoring, quality control, thermal characterization, and multi-parameter research data collection in industrial and laboratory settings.

– Compatibility & Integration

RS-232 interface for direct PC connection and real-time data transfer. Modem connectivity for remote monitoring and data retrieval.