Series 2280 Precision DC Power Supply Reference Manual
Section 3: Functions and features
077085503 / March 2019
3-7
The slew rate ranges from 10 V per second to 1000 V per second.
The slew rate setting works properly if the instrument operates below 5 V and 6 A. If it operates
above these values, the instrument sources with a noise value of 50 Hz.
Source delay
When the power supply is used to source and measure, the supply outputs a voltage and then
measures output current and output voltage. There is always some small delay between the internal
process of setting the output voltage and beginning a measurement.
A programmable source delay can be set to extend the time between the internal setting of the output
voltage and the beginning of the first reading. This is a source-delay-measure (SDM) cycle. During
each SDM cycle, the following occurs:
1. The supply sets the output level.
2. A delay timer starts (if a source delay time has been set).
3. The measurements begin after the delay timer expires.
The default value for the source delay is 1 ms. The source delay can be set from 0 s to 99 s with
10 µs resolution. Using source delay allows for output settling time when output values are changed.
If you change the resolution to 5.5 or 6.5, the instrument enables source delay and sets the delay
time to 1 ms. For details about resolution, refer to
(on page 4-2).
Setting the source delay
Using the front panel:
1. Press the
MENU
key.
2. Under Source, select
Delay
.
3. Select the button next to
Source Delay
and enter a value.
4. Select the button next to
State
and turn on the source delay.
