The supply will respond with a ''1" which indicates that CMODE is on or a "0" which indicates that CMODE is off.

DCPON. The DCPON command sets the state of all outputs at power-on. You can specify if the outputs wake up enabled or disabled when the unit is turned on. To enable all outputs at turn-on send:

DCPON 1

To disable all outputs at turn-on send:

DCPON 0

Note that these commands set the output voltage to zero and the output current to a slightly positive value when the OUTPUT OFF command is issued. Therefore, the constant voltage feedback loop is active and the outputs are in constant voltage mode when programmed “OFF”.

Starting with firmware revision A.00.04 and later, two additional commands let you set the output current to a slightly negative value when the OUPUT OFF command is issued, causing the outputs to be in constant current mode when programmed “OFF”. The benefit of being in constant current mode when the output is off is that if the load impedance and the voltage and current settings are such that the unit is forced into constant current mode at turn on, then the current feedback loop will be active during the transition to OUTPUT ON, and there will be no output current overshoot due to mode crossover.

To enable all outputs in constant current mode at turn on send:

DCPON 2

To disable all outputs in constant current mode at turn-on send:

DCPON 3

 

 

Table 5-8. Error Messages

Front Panel

HP-IB

 

Explanation

Response

Code

 

 

.

 

 

 

NO ERROR

0

This is the response to the ERR? query when there are no errors.

INVALID CHAR

1

You sent the supply a character it did not recognize.

INVALID NUM

2

Format of your number is incorrect. Check number syntax.

INVALID STR

3 or 28

Occurs when you send a command the supply does not understand.

SYNTAX ERROR

4

Either too many parameters are sent without delimiters or the number

 

 

representation is incorrect. Follow the Syntax Diagram in Figure 5-2. Check

 

 

spaces and delimiters.

 

NUMBER RANGE

5

An out of range number was sent. Send a new number within the legal range.

NO QUERY

6

Computer addressed the supply to talk, but it did not first request data. Send

 

 

query first then address supply to talk.

DISP LENGTH

7

Quoted string exceeds the display length of 12 characters. Shorten string to a

 

 

maximum of 12 characters.

BUFFER FULL

8

This error may occur if too many numbers are sent. Error #4 or #5 may occur

 

 

first.

 

EEPROM ERROR

9

EEPROM is not responding correctly to programming commands. An

 

 

instrument failure has occurred and service is required.

80 Remote Operation

Page 79 Page 81
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HP 6621A, 6623A, 6624A manual Front Panel, Explanation, Response Code
Page 79 Page 81

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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