Agilent Technologies 66111A User Manual page 46

4 - Turn-On Checkout
Procedure
7. Plug the output connector
back into the unit.
8. Press Shift, Prot Clear
9. Press Voltage
10. Press Enter Number,
<15>, Enter
11. Press Shift, OV
12. Press Enter Number,
<8>, Enter
Press Shift, OV,
13.
Enter Number,
<22>, Enter
14. Press Shift, Prot Clear
15. Press Output On/Off
16. Connect a jumper wire
across the + and - output
terminals.
17. Press Output On/Off.
18. Press Current,
Enter Number,
<1>, Enter.
19. Press Shift, OCP
20. Press Shift, OCP
21. Press Shift, Prot Clear
22. Turn the unit off and remove
the shorting wire from the
output terminals.
46
Display Explanation
Restores the output sense connections. The Prot
annunciator is still on.
NO FAULT Clears the protection condition. Prot is off; CV is on.
VOLT 0.000 Display shows the output voltage setting of the unit.
VOLT <15> Programs the main output to 15 volts. After the value
15.003V 0.0001A is entered, the display returns to Meter mode.
Because the output is enabled, the meter will indicate
the actual output voltage.
PROT:LEV 22.00 Display shows the overvoltage protection trip voltage
of the unit.
PROT:LEV <8> Programs the OVP to 8 volts, which is less than the
previously set output voltage.
0.000V 0.0001A Because the OVP voltage entered was less than the
output voltage, the OVP circuit tripped. The output
dropped to zero, CV turned off, and Prot turned on.
PROT:LEV <22> Programs the OVP to a value greater than the output
voltage setting of the unit. This prevents the OV
circuit from tripping again when the protection
condition is cleared.
15.003V 0.0001A Clears the protection condition, thus restoring the
output of the unit. Prot turns off and CV turns on.
0.000V 0.0000A Turn the output off.
Shorts the output of the unit.
0.004V 3.0712A
The CC annunciator is on, indicating that the unit is
in constant current mode. The unit is sourcing output
current at the maximum rating, which is the default
output current limit setting.
CURR <1> Programs the output current to 1 ampere.
0.001V 0.0003A You enabled the overcurrent protection circuit. The
circuit then tripped because the unit was operating in
constant current mode. The CC annunciator turns off,
and the OCP and Prot annunciators turn on.
0.001V 0.0003A You have disabled the overcurrent protection circuit.
The OCP annunciator turns off.
0.004V 0.998A
Restores the output. The Prot annunciator turns off.
The CC annunciator turns on.
The next time the unit turns on it will be restored to
the *RST or factory default state.