HP 6621A, 6623A, 6624A manual

LINE 300: Instructs the power supply to perform an overvoltage calibration on the specified channel.

LINE 310--330: Displays a message on the computer until bit 4 (RDY) of the power supply's serial poll register indicates that the supply is finished processing the OVCAL command. This may take up to 10 seconds.

LINE 350: Checks for errors. See line 280.

LINE 370,380: Prompts the user to make current calibration connections and waits for CONTINUE key to be pressed.

LINE 400: Sets the current of the specified output to the high calibration point.

LINE 410: Sets the variable Ihi to the output current as measured by the voltmeter across the shunt resistor. Note that Ihi is in amps since the voltmeter returns volts and Shunt _ resistor is in ohms.

LINE 430: Sets the current of the specified output to the low calibration point.

LINE 440: Sets the variable Ilo to the output current as measured by the voltmeter across the shunt resistor.

LINE 460: Sends the measured data in amps to the power supply for the specified channel.

LINE 480: Checks for errors. See line 280.

LINE 500: Set output voltage to 0 so that output connections may be safely moved.

LINE 520,530: Loops to Start_loop if the user has more outputs to calibrate otherwise, continues.

LINE 550: Stores the calibration constants by turning off the power supply calibration mode.

LINE 570--600: Clears the supply and ends the main program.

LINE 630: Defines the user defined function FNDvm.

LINE 640: Brings in the COM block "Instr''.

LINE 650: Waits .02 seconds for the supply to settle at the calibration points.

LINE 660,670: Takes a reading from the voltmeter.

LINE 680: Returns the voltmeter reading to the appropriate variable within the main program.

LINE 690: Ends the user defined function FNDvm.

LINE 710: Defines the user defined function FNPs _ err.

LINE 720: Brings in the COM block "Instr".

LINE 730,740: Queries the power supply for any errors.

LINE 750: If an error occurred, the computer reports the error.

LINE 760: Returns the error number to the appropriate place within the main program.

LINE 770: Ends the user defined function FNPs _ err.

Calibration Procedures 95

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.