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Using the Keypad
Shifted Keys
Some of the front panel keys perform two functions, one labeled in black and the other in blue. You access the blue function
by first pressing the blue
to the key's shifted (blue) function.
Backspace Key
The
key is an erase key. If you make a mistake entering a number and have not yet entered it (have not pressed
), you can delete the number by pressing
this key.
Output Checkout
Important
When the power supply is turned on, it asserts the state stored in EEPROM memory location 0. For a new
unit, this is the factory default (*RST) state. The following procedures assume that the factory default
state is still in location 0 (Turn-On Conditions in Chapter 5 for details).
Checking the Voltage Function
The tests in Table 3-1 check the basic voltage functions with no load connected to the power supply. The VOLTS display
will show various readings. Ignore the AMPS display.
Table 3-1. Checking the Voltage Functions (Output Terminals Open)
Procedure
If Dis is on, turn it off by pressing
Press
key
Press
Press
Press
several times
Press
the same
number of times
Rotate Voltage control first
counterclockwise and then
clockwise
Press
Press
22
Turn-On Checkout
key, which is not labeled. When the Shift annunciator is on, you will know you have access
. You may delete as many numbers as you wish by repeatedly pressing
Display
Output Terminals Open or Connected to a Voltmeter
VOLT 0.000
Default voltage setting. CV annunciator should be on. (If CC
annunicator is on, increase the current by pressing
more times until CC turns off and CV turns on.)
VOLT 40
Program output to 40 volts.
40.00
Enter the voltage. Meter mode displays output voltage. During these
tests, there may be a small (relative to full output) AMPS reading that
will be ignored.
Voltage decreases several millivolts each time you press the key.*
Voltage increases several millivolts each time you press the key.*
* The number of millivolts change is determined by the voltage programming resolution
of your power supply (see Appendix A -"Supplemental Characteristics").
Control operates similarly to
is rate sensitive. Turning it more quickly causes a more rapid change
in voltage.
40.00
Program output to 40 volts.
Display shows default OVP (overvoltage protection) trip voltage for
your unit (see Appendix A - "Supplemental Characteristics").
Explanation
and
keys. The control
one or
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