Agilent Technologies N6700 manual Program the Output Relays, Outprelpol REV,@1, Outprelpol NORM,@1

4 Operating the Power System

Output channel turn-on characteristics vary across the three module types - DC Power, Autoranging, and Precision (Refer to Appendix D for more information). When output channels of the same module type are programmed off-to-on, output sequencing is precisely determined by the programmed turn-on delays.

When outputs of different module types are sequenced, there may be an additional offset of a few milliseconds from one output to another. This offset is the same for each module type and is repeatable. Once you have characterized this offset, using an oscilloscope for example, you can adjust the programmed delays to compensate for the offset and give the desired output sequencing.

Outputs within the same module type can also have an offset if one model has output relays (Option 761) and another does not. These offsets are also repeatable and can be compensated by adjusting the programmed delay values.

Program the Output Relays

Programmable output relays are available on power modules with Option 760 or Option 761. Option 761 provides double-pole, double- throw relays that disconnect both the output and sense terminals. Option 760 is the same as option 761 but adds output reversal relays.

If you have Option 761 installed, the normal operating mode of the relay is to open and close as the output is turned on or off. The relays are only opened or closed when the output is at a safe state (zero voltage; zero current). Note however, that you can program the output state on or off while leaving the relay state unchanged.

Front Panel:	SCPI Command:
Not Available	To leave the relays closed when output 1 is turned off:
	OUTP	OFF,NOR,(@1)
	To leave the relays open when output 1 is turned on:
	OUTP	ON,NOR,(@1)

If you have Option 760 installed, you can also reverse the polarity of the output and sense terminals. Note that this command briefly turns the output off while the output and sense terminal polarities are switched. Also note that if this option is installed in Model N6742B, the maximum output current will be limited to 10A.

Front Panel:	SCPI Command:
Select Output\Polarity.	To switch the output and sense terminal
Then check the Reverse box.	polarities of output 1:
	OUTP:REL:POL REV,(@1)
Uncheck the Reverse box to	To return the polarities back to normal:
return the polarity to normal.	OUTP:REL:POL NORM,(@1)

	When the output polarity has been reversed, the voltage meter on the front
NOTE
	panel display will show a bar over the voltage reading: 10.001V

54 Series N6700 User’s Guide