Table A-1. Calibration Commands

Command

Header

Channel*

Data

Syntax

 

 

Range

 

(see Figure 5-2)

Calibration Mode

CMODE

 

0,1 (off,on)

C2

Set High Voltage

VHI

1,2,3,4

-

C3

Set Low Voltage

VLO

1,2,3,4

-

C3

Set High Current

IHI

1,2,3,4

-

C3

Set Low Current

ILO

1,2,3,4

-

C3

Calibrate Overvoltage

OVCAL

1,2,3,4

-

C3

Voltage Data

VDATA

1,2,3,4

see Table A-2

C5

Current Data

IDATA

1,2,3,4

see Table A-2

C5

*Channels 3 and 4 are not used in all models.

Table A-2. Voltage and Current Data Ranges

 

Voltage Range in Volts

Current Range in Amps

 

 

Vlo

 

Vhi

llo

 

 

Ihi

Output

Min

Max

Min

Max

Min

Max

Min

Max

40 W Low Voltage

0

0.1

18.5

20.5

0

0.15

4.5

5.3

40 W High Voltage

0.04

0.20

44

48

0

0.1

1.5

2.1

80 W Low Voltage

0

0.1

18.5

20.5

0.05

0.25

9

10.5

80 W High Voltage

0.04

0.20

44

48

0

0.1

3.5

4.2

General Calibration Procedure

This procedure causes the voltage of the specified output to go to full scale value. Take appropriate precautions.

The following general procedure applies to any computer that you are using to control your power supply. This procedure must be repeated for each output on your power supply. The calibration commands shown are the actual string commands that must be sent to the power supply. Because the power supply will attempt to calibrate itself even when incorrect or invalid readings are sent to it, it is recommended that you perform some type of error checking after steps 4, 5, and 8 to ensure that the values sent to the supply are legitimate. Use the ranges in Table A-2 as a guide. If an error is detected while in calibration mode, send CLR or turn the supply off to maintain the previous calibration constants. This will prevent incorrect constants from being stored. See Table 5-8 for a list of errors.

Before you continue with this procedure, disconnect all loads from the supply, strap the supply for local sensing, and connect the voltmeter to the + S and - S terminals as shown in the voltage calibration setup of Figure A-1.

Start with output channel 1 and use the following commands to calibrate your power supply:

Calibration Procedures 91

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HP 6624A, 6623A, 6621A manual General Calibration Procedure
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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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