2 – General Information
the HP 6632A, 6633A, and 6634A Series dc power supplies (refer to appendix D in the the Programming Guide). Dc source status registers allow remote monitoring of a wide variety of dc source operating conditions.
Output CharacteristicThe dc source’s output characteristic is shown in the following figure. The output of the dc source may be adjusted to any value within the boundaries shown.
| Output |
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| Voltage |
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| CV operating line |
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| Vmax |
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| VSET |
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| 1 |
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| 2 | CC operating line | |
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- |
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| + | Output |
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0 | ISET Imax |
| Current |
The dc source can operate in either constant voltage (CV) or constant current (CC) over the rated output voltage and current. Although the dc source can operate in either mode, it is designed as a constant voltage source. This means that the unit turns on in constant voltage mode with the output voltage rising to its Vset value. There is no command for constant current operation. The only way to turn the unit on in constant current mode is by placing a short across the output and then enabling or turning the output on.
Note that the dc source cannot be programmed to operate in a specific mode. After initial turn- on, the operating mode of the unit will be determined by the voltage setting, the current setting, and the load resistance. In figure
Figure
NOTE: If you attempt to operate the dc source beyond its output ratings, the output of the unit will become unregulated. This is indicated by the UNR annunciator on the front panel. The output may also become unregulated if the ac input voltage drops below the minimum rating specified in Appendix A.
Appendix A documents the dc source’s specifications and supplemental characteristics.
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