6.Check that the display reads approximately 0 volts and the minimum current limit value (0.05 to 0.13A depending upon the model and output, see Table 5-4). Also, check that the front panel CC annunciator is on indicating that the output is in the constant current mode of operation.

7.Set the current to 0.5 A by pressing:

ISET

.

5

ENTER

8.Check that the display reads approximately 0 V and 0.5 A.

9.Enable the overcurrent protection circuit by pressing:

OCP

10.Check that the OCP ENBLD annunciator is on indicating that overcurrent protection is enabled and the display reads "OVERCURRENT". When in overcurrent, the output is disabled.

11.Disable the overcurrent protection circuit by pressing:

OCP

12. Reset the output by pressing:

OC

RST

13.Check that the display reads approximately 0 V and 0.5 A.

14.Turn off the supply and remove the jumper from the output terminals.

Repeat the tests given on pages 37 & 38 for the other output channel (s) using the

key.

Introduction To Remote Operation

The following paragraphs explain the fundamentals of operating the supply remotely from a computer. Only a few commonly used programming commands will be discussed. Refer to Chapter 5 for a detailed description of all the commands. The intent of this discussion is to help first time users to quickly become familiar with operating their supply from a computer.

The programming examples that follow assume that a computer is connected to the HP-IB connector on the rear of your supply (see Chapter 2), power is applied, and loads are not connected to any of the supply's outputs. The examples used are primarily for HP Series 200 computers using HP BASIC language. Read the manuals for your particular computer to find out which statements you must use.

Enter/Output Statements

The programming statements you use to operate your supply from remote depend on your computer and its language. In particular, you need to know the statements your computer uses to output and enter information. For example, the HP BASIC language statement that addresses the power supply to listen and sends the command to the power supply is:

38 Getting Started

Page 37 Page 39
Page 38
Image 38
HP 6621A, 6623A, 6624A manual Introduction To Remote Operation, Iset Enter, Ocp, Enter/Output Statements
Page 37 Page 39

6624A, 6621A, 6623A specifications

The HP 6623A, 6621A, and 6624A are precision DC power supplies widely recognized for their reliability and performance in various laboratory and industrial applications. These models are part of HP's 662X series, designed to cater to the needs of engineers, researchers, and technicians who require accurate power sources for their testing and development activities.

The main features of the HP 6623A, 6621A, and 6624A include their high stability, low ripple, and excellent load regulation, ensuring that the output voltage and current remain stable during testing. The power supplies provide multiple output channels, allowing users to power multiple devices simultaneously. The flexibility in setting voltage and current levels makes these models ideal for a wide range of applications, including semiconductor testing, device characterization, and system integration.

One of the standout technologies in the HP 662X series is the use of smart design techniques that minimize noise and enhance output performance. These power supplies incorporate advanced feedback mechanisms to maintain steady output, even under varying load conditions. Additionally, they feature programmable outputs, which means users can adjust the output levels through a connected computer or control system, streamlining the testing process and improving efficiency.

The HP 6623A model offers three independent outputs, with total power capabilities of 40 watts. It includes a 0-20V output, which can deliver up to 2A of current, along with two additional outputs that are adjustable. The 6621A provides a single output option, delivering a maximum of 20V and 2A, making it well-suited for simple applications where a single power source is required. In contrast, the HP 6624A stands out with its four independent output channels, providing a total of 60 watts, making it the most versatile of the three models.

Characteristics of these power supplies include user-friendly interfaces, allowing for easy configuration and monitoring of settings. LED indicators provide real-time feedback on voltage and current levels, enabling users to quickly assess the performance of their tests. Moreover, built-in protection features safeguard both the power supply and the connected devices from overvoltage and overcurrent conditions.

Overall, the HP 6623A, 6621A, and 6624A power supplies embody advanced engineering and design, making them invaluable tools for professionals looking for high-quality, reliable power sources for their electronic testing needs.
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