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4
Turn-On Checkout
Checkout Procedure
Successful tests in this chapter provide a high degree of confidence that your unit is operating properly.
For performance tests, see appendix B.
NOTE: To perform the checkout procedure, you will need a wire for shorting the output
terminals together.
The following procedure assumes that the unit turns on in the factory-default state. If you need more
information about the factory default state, refer to the *RST command in chapter 8. Note that the values
shown in the Display column may not exactly match the values that appear on the front panel of the unit.
If you have not already done so, connect the power cord to the unit and plug it in. Connect the output
connector to the back of the unit with the sense jumpers installed.
Procedure Display Explanation
1. Turn the unit on. The dc
source undergoes a self-test
when you first turn it on.
**********
ADDRESS 5
0.000V 0.0001A
During selftest, all display segments are briefly lit,
followed by the GPIB Address.
The display then goes into meter mode with the Dis
annunciator on, and all others off. In Meter mode the
n.nnnV digits indicate the output voltage and the
.nnnnA digits indicate the output current. The
flashing digit on the display indicates the digit that
will be affected if changes are made to the displayed
values using the rotary control or the # and & keys.
You will only see the changes if the output is ON.
NOTE: Press the Meter key to exit a menu at any time and return to meter mode. If the Err
annunciator on the display is on, press the Shift key followed by the Error key to see the
error number. See table 4-1 at the end of this chapter.
2. Check that the fan is on. You should be able to hear the fan and feel the air
coming from the back of the unit.
3. Unplug the output connector
from the back of the unit.
-0.224V 0.0000A The output voltage indicates approximately -0.2 volts
because the output sense connections have opened.
4
Press Output, scroll to
SENSE:PROT and select
ON. Press Enter
SENSE:PROT ON Enables the open sense detect circuit.
5.
Press Output On/Off
-0.224V 0.0000A The open sense detect circuit disables the output. The
Dis annunciator is off, but the Prot annunciator is on.
6.
Press Protect
+/- SENSE OPEN Display indicates the protection condition.