Alignment Procedures

Introduction

This appendix contains the software alignment procedures for the power supply. These supplies should be aligned twice a year, or whenever certain repairs are made (see Service Manual).

The equipment that you need and the test setups to perform the alignment are also shown. A listing of the alignment procedure appears at the end of Appendix A. Refer to Appendix C (Command Summary) for detailed explanations of the commands used within the alignment program.

Because there are no internal or external hardware adjustments, your power supply can be aligned without removing the covers or removing it from the cabinet if it is rack mounted. Alignment is performed by measuring actual output values and sending them to the supply over the GP-IB.

Security against accidental alignment is available. A jumper inside the unit may be moved from NORMAL to CAL LOCKOUT to disable all alignment commands. Access to this jumper requires opening the unit (see Service Manual).

If a number returned to the power supply is out of range while running the alignment program, the front panel ERR annunciator will indicate an error. For example, an error will be created if the DMM is connected to measure a current when a voltage measurement is anticipated by the program.

Note	The memory used to store correction constants will accept and store data about 10,000 times, which is
	more than sufficient for normal calibrations over the life of the instrument. However, do not put the unit
	in a calibration loop that repeatedly turns the calibration mode on and off.

Test Equipment and Setup Required

The following test equipment is required for alignment:

1.A computer connected to the GP-IB connector on the back of the power supply.

2.An Agilent 3458A Digital Multimeter (DMM).

3.A precision 0.1 ohm ±0.003%, 5 A shunt resistor (4 terminal). Recommended--Leeds & Northrop Part Number 4221-B (in oil bath) or Guildline - Part Number 9330/.l/Agilent (in air).

In line 130, change the constant SHUNT_r to the actual measured value of the shunt being used.

Figures A-1 through A-5 show setups required for aligning the power supply. You will be instructed by the program to refer to a particular setup. Observe polarity when connecting the DMM.

Calibration Program

The following alignment program can be used as is, provided you have an HP Series 200/300 computer with the BASIC programming language and an Agilent 3458A DMM. Refer to Appendix C (Command Summary) for further information on the commands used within the program.

Alignment Procedures 91

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.

Agilent Technologies 6629A, 6626A, 6628A Alignment Procedures, Test Equipment and Setup Required

Models: 6629A 6625A 6626A 6628A