Section 2: General operation
Series 2280 Precision DC Power Supply Reference Manual
2-78
077085503 / March 2019
To set the current measurement range, send the command:
:SENSe:CURRent:RANGe:AUTO ON
To set the concurrent measurement range, send the command:
:SENSe:CONCurrent:RANGe:AUTO ON
You can set specific measurement ranges or allow the instrument to choose the ranges
automatically.
Protection
The Series 2280 provides several methods for ensuring that the source remains within certain values.
This helps to protect the device under test (DUT) from damage.
The protection settings that affect the source are:
(on page 2-78). This is the voltage at the instrument terminals.
(on page 2-79). This is the current at the instrument terminals.
(on page 2-82). This is the sourced voltage value at the device.
The Series 2280 also provides overtemperature protection to prevent damaging heat build-up.
Overvoltage protection
Overvoltage protection restricts the maximum voltage level that the instrument can source. This
protects the device under test (DUT) from high voltage levels.
For example, if a sense lead is disconnected or broken during a 4-wire sense measurement, the
instrument can interpret the missing sense lead as a decrease in voltage and respond by increasing
the source output. If overvoltage protection is set, the sourced output is not allowed to exceed the
overvoltage protection limit.
When overvoltage protection is set and the sourced voltage exceeds the setting:
The output is turned off.
On the home screen, an indicator to the right of the voltage displays
OVP
.
An error is generated. For more information, refer to
(on page 2-81).
When overvoltage protection is used in a test sequence, it should be set before turning the source on.
