Krohn-Hite's Model 523 Precision DC Source

Krohn-Hite's Model 523 Precision DC Source is a highly stable and repeatable DC voltage source and DC current source providing N.I.S.T. traceable voltages and currents for use in production, calibration labs, QA and QC departments, design labs, or any place where an accurate voltage and current source is needed.

Using Krohn-Hite's state-of-the-art reference, the 523 provides accurate and stable voltages from ± 10nVdc to ± 110.99999Vdc to within ± 4ppm for 90 days (± 8ppm for 1 year), and precise currents from ± 10nA to ± 110.99999mA to within ± 8ppm for 90 days (± 16ppm for 1 year). It is an extremely quiet source with <7µVrms of noise measured over a 10Hz to 100kHz bandwidth (<2µVrms 0.1Hz to 10Hz).

The 523 features a user friendly 7½ digit display and a membrane keyboard entry of all settings. Output settings can be modified using a plus/minus delta function, multiply/divide function and curser control keys that allow placing a curser on any digit to increment or decrement its value. Output 2-wire, 4-wire and chassis grounding are accomplished with one keystroke or over the GPIB interface bus. A crowbar function places the output in a safe mode when desired. The 523 output can be set to 0 volts, allowing the output sense to maintain a true 4-wire low impedance zero output. It is also quickly forced to zero before a range change to prevent any "surprise voltages" from appearing.

An AUTO ZERO OFFSET CALIBRATION (AZOC) returns any thermally generated offsets to within specified limits and is accessible via the front panel or over the GPIB interface bus. The unit is designed for a "Covers On Calibration" using the optional KH-523CAL Calibration Software Program. With the KH-523CAL program and a Model HP3458 Digital Voltmeter, unattended calibrations can be made in approximately 15 minutes.

The 523 provides for the storage of up to 31 output settings that can be recalled at any time. Internal operating temperature, serial number, last calibration date and firmware version can all be called to the display for quick access when needed. Error messages are displayed when incorrect or out-of-range entries are made.

Krohn-Hite's Model 523 is well suited for many applications where an extremely accurate and stable DC voltage or DC current is needed. At a cost much less than most sources in its class, the 523 can be a valuable asset to any company's production line, calibration lab, QA and QC department and design lab.

For more information visit Krohn Hite.

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