Agilent Technologies 5951-2827, 5951-2826 manual Monitor Outputs, External Programming Input, Fault

Monitor Outputs

The IMON and VMON output signals indicate the input current and voltage. A 0-to-10V signal at the appropriate output indicates the zero-to-full scale input current or voltage. An external DVM or oscilloscope can be connected to monitor the input voltage and current.

External Programming Input

CCand CV modes can be programmed with a signal (ac or dc) connected to the Ext Prog input. A 0-to-10V external signal corresponds to the 0-to-full scale input range in CV mode or in CC mode. The external programming signal is combined with the value programmed via the GPIB or the front panel, so that, for example, a programmed value of one-half full scale and a 5-volt external programming input would produce a full-scale value at the input.

Figure 2-9 shows the input waveform that would result from the following setup:

CCMode High Range

60% Full Scale (programmed via GPIB or front panel)

± 1 V (2 V pk-pk) 1 kHz external programming signal

The external programming signal (+ and - 1 volt) corresponds to + and - 1/10 full scale values at the input (1 volt external programming input = 1/10 full scale). Therefore, the load’s input current values between 50% and 70% of full scale as shown in Figure 2-9.

Fault

The Fault signal becomes active if an overvoltage or reverse voltage occurs at the input, as described in the Protection Features paragraphs.

Figure 2-9. External Programming Example

Operation Overview 33