The program contains embedded comments (identified by a leading asterisk {! } ) which explain various sections and procedures. To reduce keystroking, the program may be shortened to a minimum number of lines by eliminating these comments.

The alignment program is available on a 5¼ floppy (Agilent P/N 06626-10001) or 3½ inch microfloppy (Agilent P/N 06626-10002). Both disks also contain a verification program, which tests the power supply's output programming and readback accuracy to ensure that it is aligned correctly.

The program will automatically recognize what model power supply is being tested, the number of outputs the power supply has, and which type output it is testing. Using this information, the program will calibrate each of the power supply.

After the program has finished calibrating the power supply, it will store the calibration constants and turn off the calibration mode.

Type in the program and press RUN.

The program first does some "house keeping".

It will clear the screen, and assign a number of Common Variables (lines 100 - 130).

The program next assigns the address of the power supply to 705 (line 160) and the address of the DMM to 722 (line 170). It will then assign the CRT as the output device (line 180) and the value of the current shunt. Enter the exact measured value at line 190.

The power supply is sent a CLR command (line 210), which will set it to the turn on state. It will then identify what model power supply is being tested (lines 220 and 230).

Next it will preset the DMM (line 250) and set the DMM sample (line 260).

It will now place the power supply in calibration mode (line 300).

The program is now ready to perform the calibrations on the power supply.

The program will first perform a subprogram (called at line 360 and performed in lines 3420 - 3630) which will set up the output parameters of the output under test.

The program will then calibrate its voltage programming and readback circuitry (the subprogram is called at lines 370 and 380, and performed in lines 1430 - 1920). During this subprogram, the controller will pause, and request that the user set up the power supply and DMM referring to a figure in this Appendix. Press CONTINUE when ready.

Next the overvoltage circuitry will be calibrated (the subprogram is called in line 390, and performed in lines 1960 - 2070).

The current alignment tests on the 2 Amp, 50 W outputs are made using a shunt, be sure that the DMM is connected to the HI and LO voltage input terminals when the shunt is used.

The current circuitry will be calibrated next (the subprograrn is called in lines 400 and 410, and performed in lines 2110 - 2700). During this subprogram, the controller will pause and request that the user set up the power supply and DMM referring to a figure in this Appendix. Press CONTINUE when ready.

Finally the program will calibrate its current sink readback circuitry (performed in lines 2740 - 3380).

To perform the current sink readback alignment on the Agilent 6626A, outputs of equivalent current capability are used as pairs. For example outputs 1 and 2 are used to test each other, the outputs 3 and 4 are used to test each other.

In order to perform the current sink readback alignment on the Agilent 6625A, the program automatically limits the current of output 2 (the 50 W output) to 0.5 Amps (line 2780).

92Alignment Procedures

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Agilent Technologies 6626A, 6628A, 6625A, 6629A manual Alignment Procedures
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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.
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