Section 4: Sourcing and measuring
2470 High Voltage SourceMeter Instrument Reference Manual
4-36
2470-901-01 Rev. A /
May
2019
the voltage across the resistance is limited to 100 mV. In effect, the 10 V voltage source is
transformed into a 10 mA current source.
In steady-state conditions, the set limit restricts the instrument output unless there are fast transient
load conditions.
If the source output exceeds the source limit:
•
On the home screen, LIMIT is displayed to the right of the source voltage.
•
The Source value changes to yellow.
The source is clamped at the maximum limit value. For example, if the measurement limit is set to 1 V
and the measurement range is 2 V, the output voltage is clamped at 1 V.
For additional details on using limits, see
(on page 5-4).
Setting source limits
Using the front panel:
1.
Press
FUNCTION
and select the source and measurement combination.
2.
On the home screen, select
Limit
.
3.
Set the value.
4.
Select
OK
.
Using SCPI commands:
To set the limit when sourcing current, send the command:
SOURCe:CURRent:VLIMit <n>
Where
<n>
is the current limit value.
To set the limit when sourcing voltage, send the command:
SOURCe:VOLTage:ILIMit <n>
Where
<n>
is the voltage limit value.
Using TSP commands:
To set the limit when sourcing current, send the commands:
smu.source.func = smu.FUNC_DC_CURRENT
smu.source.vlimit.level =
limitValue
To set the limit when sourcing voltage, send the commands:
smu.source.func = smu.FUNC_DC_VOLTAGE
smu.source.ilimit.level =
limitValue
Where
limitValue
is the limit value.
