The Model 228 Voltage/Current Source is both a constant
voltage and constant current source with front panel and
IEEE operation. The Model 228 can be used as a constant
voltage source or a constant current source. It has four
quadrant operation. This means that the voltage or current
sources can operate as a source or a sink in either positive or
negative polarities. Full power capability of 1OOW may be obtained
in any quadrant.
Parameter entry is done in one of two ways. Either using the
data keypad to enter the desired value into the display or using
the display modify function. The display modify function
allows the user to modify either display by selecting a digit of
the display and incrementing or decrementing that digit with
the appropriate keys. With the carry, borrow and autorepeat
capability, front panel operation is flexible and easy to program.
The user selects the range with the decimal point.
The Model 228 has a 100 point data memory that allows the
user to store up to 100 unique values of current, voltage and
dwell time for future use. Once a particular level is stored in
the data memory, the user need not reprogram that level.
The output terminals are located on a quick disconnect board
that inserts into the rear panel of the mainframe. The output
is disconnected from the quick disconnect board when it is
removed from the mainframe.