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3-130
A readback of FV399999 means either:
1. The output is unregulated (neither voltage nor current
circuit is regulating), or
2. No measurement has ever been taken (6G34A was ad¬
dressed to talk without having received a T command).
3 131
Once the 6034A has received a T command and
taken a measurement, that value can be read back at any time,
even if the output has changed.
NOTES
It may be necessary to program a delay between
an output current change and readback of output
current to allow the current-readback metering
circuit to settle. The actual settling time required
for a particular output current change must be
determined empirically. Maximum settling time
for maximum accuracy is 200 ms for a
10A
change.
The time required for the 6034A to measure the
load-dependent parameter is a function of the dif¬
ference between the programmed value and the
actual output value. Therefore, setting the pro¬
gram value closer to the expected operating value
may increase system speed. Be careful not to set
the program values so close as to cause un ¬
wanted crossover between CV and CC modes
(see Paragraphs 3-77 and3-79).
3-19
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