450 !

460OUTPUT @Ps;''IDATA";Chan,Ilo,Ihi

470!

480IF FNPs _ err < >0 THEN Finish

490!

500OUTPUT @Ps;"VSET ";Chan,"0 ;ISET '';Chan,"0"

510!

520INPUT "ANY MORE OUTPUTS TO CALIBRATE? (Y OR N)",X$

530IF (X$=''Y" OR X$=''y") THEN Start_loop

540!

550OUTPUT @Ps;"CMODE 0"

560!

570Finish: ! HERE WHEN DONE

580OUTPUT @Ps;''CLR"

590DISP "END OF CALIBRATION PROGRAM"

600END

610!

620!

630DEF FNDvm

640COM /Instr/ (@Ps,@Vm

650WAIT.02

660TRIGGER @Vm

670ENTER @Vm;Reading

680RETURN Reading

690FNEND

700!

710DEF FNPs _ err

720COM /Instr/ @Ps,@Vrn

730OUTPUT @Ps;’’ERR?"

740ENTER @Ps;Err

750IF Err< >0 THEN PRINT "POWER SUPPLY ERROR # '';Err;" CORRECTION CONSTANTS NOT SAVED - RESTART. "

760RETURN Err

770FNEND

LINE 10: This comment line identifies the program as a CALIBRATION EXAMPLE.

LINE 30,40: Assigns I/O path names to the power supply and the voltmeter.

LINE 50: Establishes a COM block for the instruments on the HP-IB.

LINE 60: Initializes the variable Shunt _ resistor to .1 ohms.

LINE 80: Clears the power supply.

LINE 90: Initializes the voltmeter to take voltage readings.

LINE 100,110: Tells the voltmeter to take a reading and clears the voltmeters output buffer. This reading is not used in the program.

LINE 120: Turns on the power supply calibration mode.

LINE 140: Labels the line ''Start_loop" to loop back to when calibrating more than one output.

LINE 160: Enters the output channel number to be calibrated.

LINE 170,180: Prompts the user to make voltage calibration connections and waits for CONTINUE key to be pressed.

LINE 200: Sets the voltage of the specified output to the high calibration point.

LINE 210: Sets the variable Vhi to the output voltage as measured by the user defined function FNDvm.

LINE 230: Sets the voltage of the specified output to the low calibration point.

LINE 240: Sets the variable Vlo to the output voltage as measured by the user defined function FNDvm.

LINE 260: Sends the measured data in volts to the power supply for the specified channel.

LINE 280: Checks the power supply for errors with the user defined function FNPs _ err. If there was an error, the program goes to the line labeled Finish and the supply is cleared. The new measured data is not used and the previous calibration constants are maintained.

94 Calibration Procedures

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HP 6624A, 6623A, 6621A manual Input ANY More Outputs to CALIBRATE? Y or N,X$, Disp END of Calibration Program, Fnend

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.