Operating the Power System 4
Keysight N6700 User’s Guide 65
Sequence Multiple Outputs
Turn-on and turn-off delays control the power-up and power-down
sequencing of the output channels in relation to each other.
Press the Channel key to select
an output. Then select
.
Select either Turn-on or Turn-
Enter a delay in seconds, then
press Select.
Select
.
Check On/Off affects all
channels.
To program a 50 millisecond turn-
on delay for output 1 and a 100
millisecond turn-on delay for
output 2:
OUTP:DEL:RISE .05,(@1)
OUTP:DEL:RISE .1,(@2)
To program a 200 millisecond turn-
off delay for outputs 3 and 4:
Output turn-on characteristics vary across the power module types - DC
Power, Autoranging, Precision, and Source/Measure. When output
channels of the
module type are programmed off-to-on, output
sequencing is determined by the programmed turn-on delays.
When outputs of
module types are sequenced, there may be
additional offsets of a few milliseconds from one output to another that
must be accounted for. Specifying a common delay offset assures that
the programmed turn-on delays will be synchronized to start at the
completion of the common delay offset. Select the delay offset of the
slowest power module in the mainframe and use that as the common
delay offset. (See Appendix D for more information.)
In the front panel menu, select
.
The
Max delay offset for this frame
field displays the delay offset of
the slowest power module in the
frame. Enter this value into the
field in milliseconds;
then press Select.
To query the delay offset of the
slowest power module in the
mainframe (the maximum delay
offset) in seconds:
OUTP:COUP:MAX:DOFF?
To specify the common delay
offset for the mainframe in
seconds:
Program the Output Relays
Output relay availability and options are described in Chapter 1 under
“Model Differences”. 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. Note that a
small AC network is always present across the output terminals.
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.
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