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Part Number Location VM IM VP IP M P +S -S + - (3) 8-32 x 5/16 0360-2217 (4) M4x0.7 x 65mm Cover 5060-3237 (2) M3x0.5 6mm 0515-0642 (4) M5x0.8 12mm 0515-0155 (4) M4x0.7 35mm 0515-0968 Cover 5040-1626 0515-0414 (screw) 3050-1053 (washer) (3) M4x0.7 10mm SYSTEM MODELS A A A B B B B C C 28 Installation OPERATING INSTRUCTIONS Introduction This section describes the operating controls and indicators, turn-on checkout procedures, and operating procedures and considerations for the power supply. Local (front-panel) and remote (via GP-IB) operation are described separately, but the user should become familiar with both methods of operation. Information in pages 1-43 of this section applies to both local and remote operation. Standard Commands for Programming Instruments (SCPI) programming is described in Appendix C at the rear of this manual. Programming examples for specific Agilent Technologies computers are given in Appendix D. More theoretical descriptions regarding the operational features of power supplies in general are given in the DC Power Supply Handbook, Application Note 90B (available at no charge from your local Agilent Technologies Sales Support Office). Figure 3-1. Front-Panel Controls and Indicators /,1(21 OFF $'&32:(56833/<9$:',63/$<6(77,1*6',63/$<293&9&&29(55$1*(',6$%/(' 84 7 9 10 21 311 5 6 2(1$%/(')2/'%$&.287387$'-86792/7$*(&855(1792/76$036/&/507/617/.654$'-8672932927)2/'%$&.(5525 $$$. $'&32:(56833/<9$:92/76$036&9&&29(55$1*(29',63/$<6(77,1*6',63/$<293287387$'-86792/7$*(&855(17$'-867293/,1(21 10 89 11 2 5 7 6 2/&/507/617/.6542927)2/'%$&.(5525(1$%/(')2/'%$&. 1 3 4 $. Operating Instructions 29 Before the instrument is turned on, all protective earth terminals, extension cords, and devices connected to the power supply should be connected to a protective earth ground. Any interruption of the protective earth grounding will cause a potential shock hazard that could result in personal injury. This instrument can be damaged by electrostatic discharge into the GP-IB and control connectors, or the switches on the rear panel while the unit is turned on. Do not cause an electrostatic discharge into these connectors and switches (which may occur when they are touched) while the unit is turned on. Also, consistent with good engineering practice, leads attached to customer accessible signal/monitoring ports should be twisted and shielded to maintain the instruments specified performance. Controls and Indicators The front-panel controls and indicators are shown in Figure 3-1 and described in Table 3-1. Table 3-1 also lists the paragraphs, in which, use of the controls and indicators is described. Output Range For An Autoranging Power Supply The power supply can operate as a constant voltage (CV) or constant current (CC) source over a wide range of output voltage and current combinations. The specifications table contains a graph showing the overall output range of the power supply. Figure 3-2 shows a rectangular operating locus that is defined by voltage and current settings of the power supply. The point on that locus at which the power supply actually operates is determined by the load resistance. Three load- resistance lines are shown on Figure 3-2. The line representing load resistance A, the highest load resistance shown on the graph, crosses the operating locus at point 1. Point 1 is on the part of the operating locus defined by the voltage setting, so the power supply operates in CV mode. Figure 3-2. Determining Operating Point Similarly, the line representing load resistance C, the lowest load resistance shown on the graph, crosses the operating locus at point 3. Point 3 is on the part of the operating locus defined by the current setting, so the power supply operates in CC mode. 30 Operating Instructions Load Resistance B equals the crossover resistance for the particular combination of voltage and current settings shown on the graph. Either the CV or CC LED will light. If the load resistance increases, the voltage setting decreases, or the current setting increases, the power supply will operate in CV mode. Conversely, if the load resistance decreases, voltage setting increases, or current setting decreases, the power supply will operate in CC mode. In Figure 3-2 the entire rectangular operating locus falls within the output range of the power supply. Figure 3-3 shows a situation in which the voltage and current settings are high enough that the rectangular operating locus is cut off by the maximum output power boundary of the power supply. For the load resistance A, the power supply operates in CV mode at the voltage and current values for point 1. Similarly, for load resistance D the power supply operates in CC mode at point 4. For load resistances between B and C, the operating point will be on the maximum output-power boundary between points 2 and 3, and the OVERRANGE LED will be on. The VOLTS and AMPS displays will indicate the voltage and current being supplied to the output. (The product o...
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