Keithley 2303, User Manual

Page: 35 / 152

Basic Power Supply Operation 2-7
Current limit mode selection - The current limit mode is selected from the current lim
mode item of the menu. The menu is accessed by pressing the MENU key.
NOTE Table 1-2 (in Section 1) shows the menu structure. Rules to navigate the menu follow
the table.
Procedure to edit voltage and current values
The following procedure assumes that the appropriate current range is already selected.
Editing keys — Once in the output settings mode, the four editing keys (
ß
,
©
,
¹
and
ƒ
) are used
to set values. Cursor position (blinking digit) is controlled by the
ß
and
©
keys. With the cursor
positioned on a digit, increment or decrement the value using the
¹
and
ƒ
keys.
Perform the following steps to edit voltage and current values:
1. Press the SET key to select the output settings mode. A blinking cursor appears in the
voltage field of the display.
2. Use the
ß
,
©
,
¹
and
ƒ
keys to key in the desired output voltage value and press SET. The
blinking cursor moves to the current field of the display.
3. Use the
ß
,
©
,
¹
and
ƒ
keys to key in the desired current limit and press SET to exit from
the output settings mode.
Editing shortcuts
With the output OFF, the following editing shortcuts can be used:
• Output voltage can be quickly set to the maximum value by incrementing the tens
digit (MSD). Note that if the tens digit is zero, it is not displayed. Place the cursor to
the left of the units digit.
• Output voltage can be quickly set to zero (0.000 V) by decrementing the first leading
zero of the reading. If there is no leading zero, decrement the tens digit.
• Current limit on the 5A range can be quickly set to its maximum value by
incrementing the units digit (MSD).
• Current limit on either range can be quickly set to the minimum value (0.0001 A) by
decrementing the first leading zero of the reading. If there is no leading zero,
decrement the units digit.
Editing restrictions
With the output ON, the following editing restrictions are in effect:
• You cannot increment a digit that would display a value that exceeds the maximum.
For example, for the value 14.200 V, you cannot increment the “1” or the “4” since the
resultant value would exceed 15.000 V.
• When decrementing a digit, only that digit and digits to the left are affected. The
digits to the right of the cursor are not changed.