Keithley 2303, User Manual

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Emulation Commands C-3
Query ISET? Query programmed current limit
ISET? MINimum Query lowest allowable current limit (1.25mA)
ISET? MAXimum Query highest allowable current limit
ISET? DEFault Query *RST default current limit (0.25A)
Description
This command is used to set the current limit for the power supply. The max-
imum allowable current limit value depends on measurement range and the
output voltage value:
• 5A or AUTO measurement range selected – With output voltage set to 9V
or less, the maximum allowable current limit is 5A. Above 9V, the maxi-
mum allowable current limit is 3A.
• Models 2303 and 2303B: 5mA measurement range selected – The maxi-
mum allowable current limit is 1A.
• Model 2303-PJ: 500mA measurement range selected – The maximum al-
lowable current limit is 0.6A.
Programming resolution is 1.25mA.
OCP <b>
Select current limit type
Parameters
< b> = 1 or ON Select TRIP current limit type
0 or OFF Select LIMit current limit type
Description
This command is used to select the action that occurs when current limit is
reached. With LIMit selected, output current will clamp at the programmed
limit. In this condition, the power supply operates as a constant-current
source. Note that the output voltage is probably less than the programmed
voltage value.
With TRIP selected, the output will turn off when the current limit is reached.
OUT <b>
Turn output on or off
Parameters
< b> = 1 or ON Turn output on
0 or OFF Turn output off
Query
OUT? Query state of power supply output.
Description This command is used to turn the power supply output on or off. Note that
DVM measurements can be performed with the output off.