Series 668xA/669xA Power Supplies

SHOCK HAZARD. Hazardous voltage can remain inside the power supply even after it has been turned off. This procedure should only be done by qualified electronics service personnel.

Line voltage conversion is accomplished by changing jumper cable positions on the ac input of the main power transformer. Proceed as follows:

1.Turn off the power switch and disconnect the power cord from the power source or turn off the power disconnect switch.

2.Remove the four screws that secure the two carrying straps and outer cover.

3.Slightly spread the bottom rear of the cover and pull it back to disengage it from the front panel.

4.Remove the outer cover by sliding it back towards the rear of the supply.

5.Observe the input rail LEDs under the inner cover (see Figure C-4). If the LEDs are on, there is still hazardous voltage inside the supply. Wait until they both go out (this may take several minutes) before proceeding. (If one LED remains on while the other goes out, the power supply probably has a defect that requires service.)

If you cannot see the LEDs through the hole in the inner cover, then wait until power has been removed for at least 15 minutes before proceeding to the next step.

6.Remove the screws securing the inner cover (see Figure C-4).

7.Remove the inner cover.

8.Locate the three line conversion cables (A,B,C in Figure C-5). All three cables will be connected to the jacks that correspond to one of the voltage ranges (1 or 2, Figure C-5).

9.Unplug the cables from their present jacks and plug them into the jacks for the other range.

10.Replace the inner cover.

Note	Be sure to replace all of the screws removed in Step 6. All the screws are not needed for mechanical
	security, but they are required to ensure proper magnetic shielding.

11.Replace the outer cover.

12.Remove the three fuses from the rear panel. If required, first remove the ac safety cover (see Figures 2-5 and 2-6).

13.Replace the fuses with the proper ones for the new range (see Table 1-6 in Chapter 1).

14.If required, replace the ac safety cover.

Reconnect the power and turn on the power supply.

Line Voltage Conversion 121

668xA, 669xA, 667xA, 664xA, 665xA specifications

Agilent Technologies has long been a pioneer in the production of high-performance electronic test and measurement instruments, particularly in the field of power sources. Among its notable offerings are the Agilent 667xA, 669xA, 665xA, 664xA, and 668xA series of power supplies. These instruments are designed to provide stable, reliable power for a variety of applications, including electronic testing, industrial processes, and research laboratories.

The Agilent 667xA series is characterized by its programmability and advanced measurement functions. These power supplies support a wide range of output voltages and currents, allowing for flexible configurations that cater to different testing needs. The built-in measurement capabilities enable users to monitor the voltage, current, and power with high precision, which is essential for ensuring optimal performance in electronic applications.

The Agilent 669xA series stands out with its high-power outputs, making it suitable for demanding applications. These power supplies deliver high voltage and current levels, making them ideal for testing high-performance devices, such as power amplifiers and motor drives. Additionally, the 669xA series includes features such as overvoltage protection and complex output sequencing to enhance the safety and reliability of the testing process.

The Agilent 665xA and 664xA series focus on delivering high accuracy and excellent regulation. These models are particularly known for their low noise operation, which is critical for sensitive applications where precision is paramount. The integrated programming capabilities allow users to automate testing sequences, thus improving efficiency in research and development settings.

The 668xA series features advanced digital signal processing that enhances the precision and stability of the output. Users benefit from features like remote sensing and monitoring, allowing feedback adjustments that maintain output accuracy despite cable losses. Furthermore, the 668xA models can integrate seamlessly with various test environments thanks to their LAN, GPIB, and USB connectivity options.

Overall, the Agilent 667xA, 669xA, 665xA, 664xA, and 668xA power supplies provide a comprehensive range of solutions for diverse electronic testing needs. With their advanced features, superb measurement capabilities, and robust performance, these instruments empower engineers and researchers to conduct their work with confidence, precision, and efficiency.

Agilent Technologies 664xA, 665xA, 667xA manual Series 668xA/669xA Power Supplies

Models: 668xA 669xA 667xA 664xA 665xA