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2620A, 2625A
Users Manual
1-4
Table 1-1. Hydra Features
• 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 (Ω) 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
• Nonvolatile Memory
Storage of minimum, maximum, and most recent measurements for all scanned channels.
Storage of Computer Interface setup, channel configurations, and calibration values.
Storage of measurement data: storage for 2047 scans of up to 21 channels, representing up to
42,987 readings (Hydra Data Logger only).