The Fluke 2635A HYDRA Series II Data Bucket Datalogger is a 21-channel portable data acquisition instrument engineered for precision measurement and recording in demanding industrial and laboratory environments. This portable unit acquires and records measurement data across extended periods, supporting process monitoring, environmental testing, and quality control applications in remote locations. Its architecture balances channel density with field portability, enabling technicians to gather large data volumes without extensive external conditioning.
Technical Specifications
Channels & Inputs
• 21 analog input channels total
• Channels 1–20: Universal Input Module connectors for direct connection of various analog signals
• Channel 0: Front-panel input jacks for test leads
Measurement Parameters
• DC Volts
• AC Volts
• Resistance
• Frequency
• Temperature via thermocouples or RTDs
• Pressure/vacuum (with Fluke PV350 transducer module)
• DC current (with Fluke 2600A-101 shunt resistor)
Data Storage
• PCMCIA card: Standard 256 KB; optional 1 MB, 2 MB, or 4 MB memory cards
• Internal memory buffer: 70 scans during card swaps
• Battery-backed setup memory maintains configuration during power loss with automatic scan resumption
Scanning Modes
• Continuous, interval, single, or triggered scanning
Data Transfer
• RS-232 interface: Full-duplex serial communication to PC or printer at baud rates to 38.4k
• Modem interface: Remote data retrieval in upload or real-time modes
• PCMCIA slot: Direct card reading via computer
• Optional 263XA-803 memory card drive for card-based transfer
Operating Temperature
• 0°C to 60°C
Accuracy
• DC voltage: ±(0.019% + 6 µV) over 1-year calibration interval
– Key Features
• Fail-safe data buffering during PCMCIA card changes
• Flexible input architecture with minimal external signal conditioning required
• Multiple data transfer options for lab and remote field deployment
• Battery-backed memory ensures continuity across power interruptions
– Compatibility & Integration
Hydra Logger software runs on Windows 3.1 or later, Windows 95, and Windows NT on IBM PC-compatible systems with Intel 386 microprocessor or greater, 4 MB free hard disk space, and 1.44 MB floppy drive. Optional Trend Link software integrates with Fluke trending packages.
