Basic Power Supply Operation 2-9
A. SENSe:CURRent:RANGe <n>
1. After specifying a current value, the instrument will go to the most sensitive range to
accommodate that reading. For example, if you are going to set current limit to 750mA,
you can let <n> = 0.75 (or 750e-3) to select the 5A range. Another way to select a range
is to use the MINimum and MAXimum parameters as follows:
SENS:CURR:RANG MIN‘ Select the low current range (5mA or 500mA).
SENS:CURR:RANG MAX‘ Select the high current range (5A).
2. Using this command to manually select the current range disables auto range.
B. SENSe:CURRent:RANGe:AUTO <b>
This command is coupled to the :RANGe <n> command. When auto range is enabled,
the parameter value <n> for :RANGe changes to the automatically selected range value.
If you then disable auto range, the instrument will remain at the automatically selected
range.
C. VOLTage <n>
1. If the present current limit value is above 3A, setting the output voltage above 9V will
automatically default the current limit to 3A.
2. The response to VOLTage? is affected by the GPIB output format. For decimal formats,
the response has three decimal places, otherwise it is in exponential format (see Section
10 for details).
D. CURRent <n>
1. 5A or AUTO measurement range selected - With output voltage set to ≤9V, the maxi-
mum current limit value is 5A. With voltage set to >9V, the maximum current limit is
3A.
2. Models 2303 and 2303B:
• With the 5mA measurement range selected, the maximum current limit is 1A.
• Sending a value that exceeds 1A is rejected, and the following message is displayed
briefly:
CURRENT LIMIT ON
mA RANGE <= 1A
3. Model 2303-PJ:
• With the 500mA measurement range selected, the maximum current limit is 0.6A.
• Sending a value that exceeds 0.6A is rejected, and the following message is displayed
briefly:
CURRENT LIMIT ON
mA RANGE <= 0.6A
4. The response to CURRent? is affected by the GPIB output format. For decimal formats,
the response has four decimal places, otherwise it is in exponential format (see Section
10 for details).
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