California Instruments 2001RP, User And Programming Manual

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User and Programming Manual - Rev N
OUTPut:DROP
The output drop command may be used to interrupt the voltage to the UUT without opening
the output relay. This method used an electronic means of interrupting the AC source output
which enables short interruptions of as little as 1 msec or as long as 4000 sec.
In addition to short interruption times, the drop command can be set to use any of four start
phase angles at which to execute the voltage drop.
The parameter passed with the OUTP:DROP command is the drop duration in seconds.
This value can range from 0.001 ( 1 msec) to 4000 ( 1 hour, 6 min, 40 sec) but only four
digits of resolution are allowed. If no parameter is passed, the output is drop indefinitely or
until a voltage command is issued. Thus valid time periods are:
Time range
0.001 - 9.999 1 msec to 10 secs
10.00 - 99.99 10 secs to 100 secs
100.0 - 999.9 100 secs to 1000 secs
1000 - 4000 1000 secs to 4000 secs
no parameter Infinite time. Use VOLT command to turn output on.
Turing on output voltage at a specified phase angle
The following command sequence will turn the output voltage on at a specified phase angle.
This may be required to measure worst case inrush current.
/* Set up sequence
VOLT 0
Set output voltage to zero
OUTP 1 Close output relay
OUTP:STAR:STAT 1 Enable start phase mode
OUTP:STAR:PHAS 90 Set start phase angle to 90 degrees
OUTP:DROP Put AC source in infinite drop mode
/* Turn on sequence
VOLT 230
Turn on voltage to 230 V at 90 degrees
Output drop status query
The status of a drop in progress can be queried using the query format of the OUTP:DROP
command. This query will return a <Bool> indicating if the output time specified has expired
(0) or the drop is still in progress (1).
Command Syntax OUTPut:DROP <NRf>
Parameters <NRf> | none
*RST Value none
Examples OUTP:DROP 0.001
Query Syntax OUTP:DROP?
Returned Parameters 0 | 1
Related Commands OUTP:STAR:STAT OUTP:STAR:PHAS
2001RP April 2007 95