Fluke 2620A

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The Fluke 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 ideal for remote monitoring applications.

The Hydra Series Data Acquisition Unit (Model 2620A) is a multi-channel data acquisition unit able to measure ac and dc voltages, temperature via thermocouples and RTDs, resistance, and frequency. It features 21 measurement channels, 8 digital input/output lines, a Totalizer input, and 4 alarm output lines. The Data Acquisition Unit is easily carried by hand and can be ac or dc powered. The user can choose communications with a host computer over an RS-232 (standard) or IEEE-488 (2620A/05) computer interface.

• DC voltage inputs ranges: 300 mV to 300 V
• Input impedance: 100 MΩ minimum in parallel with 150 pF maximum for all ranges 3V and below 10 MΩ in parallel with 100 pF maximum for the 30V and 300V ranges
• Normal mode rejection: 53 dB minimum at 60 Hz ±0.1%, slow rate, 47 dB minimum at 50 Hz ±0.1%, slow rate
• Common mode rejection: 120 dB minimum at dc, 1 kΩ imbalance, slow rate, 120 dB minimum at 50 or 60 Hz ±0.1%, 1 kΩ imbalance, slow rate
• Maximum input: 300V dc or ac rms on any range for channels 0,1, and 11, 150V dc or ac rms for channels 2 to 10 and 12 to 20
• AC voltage inputs ranges: 300 mV to 300 V
• Maximum crest factor: 3.0
• Common mode rejection: 80 dB minimum at 50 or 60 Hz ±0.1%, 1 kΩ imbalance, slow rate
• Maximum AC Input: 300V rms or 424V peak on channels 0, 1, and 11, 150V rms or 212V peak on channels 2 to 10 and 12 to 20
• 2- and 4-wire ohms ranges: 300 Ω to 10 MΩ
• 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
• Frequency ranges: 15 Hz to >1 MHz
• Digital input voltages: 30 V maximum, -4 V minimum

The Hydra Series 2620A data acquisition unit is ideal for applications that require direct connection to a PC for real-time data collection.

• Easy-to-use front-end. An RS-232 serial interface makes it easy to connect the Hydra Data Acquisition Unit to a PC or modem for real-time data acquisition. The 2620A can also be used as a 20 channel panel meter
• IEEE interface. An optional IEEE-488 interface allows you to easily integrate the 2620A with other IEEE-488 instruments and your PC. The 2620A delivers workhorse performance for a wide variety of applications such as test and monitoring systems
• 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
• 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
• Nonvolatile Memory: Storage of minimum, maximum, and most recent measurements for all scanned channels. Storage of Computer Interface setup, channel configurations, and calibration values