The readback resolution of the 25 watt outputs when metering voltages of 7 volts or below, will be 483 μV. For voltages above 7 volts, the readback resolution will be 3.3 mV.

The readback resolution of the 25 watt outputs when metering source currents of 15 mA or below, the readback resolution will be 1 μA. When metering source currents above 15 mA, the readback resolution will be 48 μA.

When metering sink currents of 15 mA or below, the readback resolution of the 25 watt outputs will be 1 μA. When metering sink currents above 15 mA, the readback resolution will be 37 μA.

When metering voltages of 16 volts, or below, the readback resolution of the 50 watt outputs will be 1.1 μV. For voltages above 16 volts. the readback resolution will be 3.3 mV.

When metering source currents of 200 mA or below, the readback resolution of the 50 watt outputs will be 14 μA. When metering source currents above 200 mA, the readback resolution will be 160 μA.

When metering sink currents of 200 mA or below, the readback resolution of the 50 watt outputs will be 14 μA. When metering sink currents above 200 mA, the readback resolution will be 151 μA.

Protection Features

Protective circuitry within the supply can limit or turn off an output in the event of an abnormal condition. The activated protection feature can be determined by observing the front panel display area. You can also read back the status of the supply over the GP-IB. The following protection features are implemented:

OVERVOLTAGE --shorts the output by firing an SCR crowbar and sets zero volts and minimal current on an output if any of the following conditions are present:

1.The output voltage exceeds the programmed overvoltage trip point. or

2.The sum of the voltage from the + V output terminal to the +S terminal plus the voltage from the -S terminal to the -V output terminal exceeds 10.0 V (applies to remote sensing only).

or

3. A trip signal is received on the output’s OV terminals.

or

4. The output’s fixed overvoltage circuit is activated.

The OV trip point can be programmed up to 55 V. When an overvoltage occurs, the word OVERVOLTAGE appears in the front panel display and the OV status bit is set for that output. Chapter 5 explains how to program the overvoltage trip level.

A fixed overvoltage threshold of approximately 120% of the maximum rated output voltage is built into each output. Because the fixed overvoltage circuit is biased from the output terminals, it can be activated and provide protection even when the supply is not connected to the ac power line.

The OVRST command or front panel RESET key restores the programmed voltage and current values and clears the OV once the cause of the overvoltage has been eliminated.

OVERCURRENT --when the overcurrent protection feature is enabled, and the output is sourcing current and enters the +

CCoperating mode, the output will be disabled (set to zero volts and minimal current) and the word OVERCURRENT will appear on the front panel display. In addition, the OC status bit is set for that output. The OCRST command or front panel RESET key restores the programmed voltage and current values and clears the OC once the cause of the overcurrent condition has been eliminated. Refer to Chapter 5 for programming details.

48Output Connections and Operating Information

Page 48
Image 48
Agilent Technologies 6626A, 6628A, 6625A, 6629A manual Protection Features

6629A, 6625A, 6626A, 6628A specifications

Agilent Technologies, a recognized leader in electronic test and measurement solutions, has developed a series of precision power supplies ideal for a variety of applications in both research and industry. The Agilent 6628A, 6626A, 6625A, and 6629A are part of the Agilent 6000 series and stand out due to their innovative technologies and robust functionalities.

The Agilent 6628A is a triple-output power supply, featuring two 0 to 20 V outputs capable of delivering up to 3 A each, along with a 5 V output that can supply 5 A. This combination is perfect for supplying power to devices that require multiple supply voltages simultaneously, making it an excellent choice for testing and development purposes.

The Agilent 6626A, on the other hand, offers dual output capabilities with higher specifications. Each of its outputs can be adjusted from 0 to 25 V and delivers up to 3 A, providing enhanced flexibility for designers and engineers working with various devices. Additionally, the 6626A's compact size and lightweight design make it easy to integrate into test setups without occupying excessive space.

For applications that require comprehensive monitoring, the Agilent 6625A provides a unique solution with its built-in digital voltmeter (DVM). This power supply comes with two 0 to 25 V outputs, both capable of 3 A. The integrated DVM allows real-time measurement and displays voltage and current values, ensuring accurate readings during experimentation and testing.

Lastly, the Agilent 6629A is designed for high-performance applications, providing up to four outputs, including two adjustable outputs that can be set between 0 to 35 V and deliver 5 A each. This model is particularly suited for environments where multiple devices need to be powered simultaneously with varying voltage requirements.

All four models come equipped with key features including ease of programming, precision regulation, and superior load transient response. They employ advanced technologies like low-noise operation and excellent line regulation, ensuring stable performance under varying load conditions. Additionally, safety features such as overvoltage protection, current limiting, and rapid recovery from overloads guarantee reliable operation.

In summary, Agilent's 6628A, 6626A, 6625A, and 6629A power supplies provide versatile, precise, and reliable solutions for all electronic testing needs. Their characteristics and dedicated functionalities make them indispensable tools for engineers, researchers, and developers across numerous fields. Whether it's for prototyping, testing, or production, these power supplies deliver the quality and performance that professionals expect from Agilent Technologies.