Fluke 2625A

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The Hydra Series is available in three models to fit many application requirements. The 2620A Hydra Data Acquisition Unit is a compact front end for use with your PC. The portable 2625A Hydra Data Logger features non-volatile memory that stores more than 2000 scans, for stand-alone applications. And the 2635A Hydra Data Bucket with its removable memory card for data and set-up storage is the most versatile model - ideal for remote monitoring applications.

All models are easy to set up and reconfigure from the front panel. Additionally, all units have bi-directional communication via RS-232C, which enables control from a host computer. The RS-232C interface also supports stand-alone use with a serial printer. An optional GPIB/IEEE-488 interface is available for the 2620A only.

The Hydra Series is extremely rugged and able to operate in diverse environments. Its operating range is 0 to 60ºC, and it is tested to stringent shock and vibration standards. The sturdy Hydra metal chassis effectively shields against electromagnetic interference, maintaining high measurement accuracy on low level signals. The analog circuitry is also isolated from the digital circuitry so you can measure high voltages directly (up to 300V ac rms). And it conforms to I.E.C., C.E., and CSA safety standards. As well, all set-up information is battery-backed, so it is immune to power failure. Hydra will return from a power loss and resume scanning, while all configuration information and stored data remain intact.

The Hydra 2625A is a Data Logger that measures DC and AC RMS voltage, temperature, resistance, and frequency. It features non-volatile memory that stores more than 2000 scans, for stand-alone applications. It is easy to set up and configure from the front panel, and combines the features of the 2620A data acquisition unit with data logging memory. It includes bi-directional communication via RS-232C, which enables control from a host computer.

• Data memory
  • Stores 2,047 scans
  • Stored with each scan: time stamp, all defined analog input channels, the status of four alarm outputs and eight digital I/O, and the totalizer count
  • Memory life: 5 years minimum, at 25°C
  • Memory is battery-backed
• Measurements
  • DC Volts: 90 mV to 300/150V
  • AC Volts: 90 mV to 300/150V
  • Resistance: 300Ω to 10 MΩ
  • Frequency: 15 Hz to 1 MHz
  • RTD (Pt 100): -200 to 600ºC
  • J Thermocouples: -100 to 760ºC
  • K Thermocouples: -100 to 1372ºC
  • T Thermocouples: -150 to 400ºC
  • Other Thermocouple types: R, S, B, C, E, N
• Channel Capacity
  • Analog Inputs: 21, Digital I/O & Alarm Output
  • Totalizer: 1
• Channel Scanning: Can be continuous scanning, scanning at an interval time, single scans, or triggered (internal or external) scans
• Channel Monitoring: Make measurements on a single channel and view these measurements on the display
• Channel Scanning and Monitoring: View measurements made for the monitor channel while scanning of all active channels continues
• Multi-Function Display
• Left (numeric) display shows measurement readings; also used when setting numeric parameters
• Right (alphanumeric) display used for numeric entries, channel number selection and display, status information, and operator prompts
• Front-Panel Operation: Almost all operations can be readily controlled with the buttons on the front panel
• Measurement Input Function and Range: Volts dc (VDC), volts ac (VAC), frequency (Hz), and resistance (W) inputs can be specified in a fixed measurement range. Autoranging, which allows the instrument to use the measurement range providing the optimum resolution, can also be selected
• Temperature Measurement: Thermocouple types J, K, E, T, N, R, S, and B, and Hoskins Engineering Co type C are supported. Also, DIN/IEC 751 Platinum RTDs are supported
• Totalize Events on the Totalizing Input
• Alarm Limits and Digital Output Alarm Indication
• 4-Terminal Resistance Measurements (Channels 1 through 10 only)
• RS-232 Computer Interface Operation
• Measurement Rate Selection