Example 2: VSET 1,20

Now output 1 is in the high range programmed to 20 V and 2A.

Example 3: VSET 1,5; ISET 1,3

Output 1 is now in the low range programmed to 5 V and 3A.

Example 4: VSET 1,10

Now output 1 is in the high range and the current is automatically scaled back from 3 A to the lower current limit of

2.06A. The output is operating in the same range as that of Example 2. Example 5: VSET 1,20; ISET 1,3

The ISET command will cause the voltage to be scaled back to the low range limit of 7.07 V and the output will operate within the boundaries of the low range as in Example 3.

NOTE

When the range is automatically switched, as in examples 4 and 5, the "coupled parameter'' bit (CP) in

 

the status register (see Table 5-5) is set to indicate that range switching occurred.

Output On/Off

The OUT command disables/enables an output channel of the power supply. It will not disturb any other programmed function nor will it reset the protection circuits. You can control individual outputs with the OUT command as shown below. For example, to disable output channel 1 send the following:

OUT 1,0

To enable output channel 1 send the following command

OUT 1,1

You can find out the present state of output 1 by sending the query:

OUT? 1

and addressing the supply to talk. The response from the supply is either a "0" to indicate output 1 is off or a "1'' to indicate that the output is on. When disabled, the output behaves as if it were programmed to zero volts and minimum current.

Overvoltage (OV) Protection

The programmable OV is a protection feature which can be set by the operator to protect the load against excessive voltage. When the actual voltage exceeds the programmed overvoltage setting for a given output channel, the OV is tripped. The OV circuit will fire the SCR crowbar which shorts across the output and the output assumes a low impedance state.

For example, to program the OV of output channel 1 to 9.5 V send the following command:

OVSET 1,9.5

To find out the OV setting for output channel 1 send the following query and address the supply to talk:

OVSET? 1

Remote Operation 71

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HP 6621A, 6623A, 6624A manual Output On/Off, Overvoltage OV Protection, Ovset?
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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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