In Case Of Trouble; Selftest Error Messages - Agilent Technologies 66111A User Manual

Only perform steps 23 to 33 if you are verifying an Agilent 66309B or 66309D unit.
Procedure
23. Turn the unit on. Wait for
selftest to complete and
press Shift, Channel.
Press Voltage,
24.
Enter Number,
<12>, Enter.
25. Press Output On/Off
26. Press Output On/Off
27. Connect a jumper wire
across the + and -
terminals of output 2.
28. Press Output On/Off.
29. Press Current,
Enter Number,
<1>, Enter.
30. Press Shift, OCP
31. Press Shift, OCP
32. Press Shift, Prot Clear
33. Turn the unit off and
remove the shorting wire
from the output terminals.

In Case of Trouble

Dc source failure may occur during power-on selftest or during operation. In either case, the display may
show an error message that indicates the reason for the failure.

Selftest Error Messages

Pressing the
Shift, Error
<n> where "n" is a number listed in the following table. If this occurs, turn the power off and then back
on to see if the error persists. If the error message persists, the dc source requires service.
Display
2
0.025V 0.0002A
2
VOLT <12>
2
12.005V 0.0002A
2
0.000V 0.0000A
2
0.004V 1.520A
2
CURR <1>
2
0.001V 0.0003A
2
0.001V 0.0003A
2
0.004V 0.998A
keys will show the error number. Selftest error messages appear as: ERROR
Explanation
Shift Channel toggles between channel 1 and channel
2. The left-most digit of the display identifies the
output channel that is presently being controlled. It will
indicate a "1" for channel 1, or "2" for channel 2.
Programs the output 2 voltage to 12 volts.
Turns the main output and output 2 on. The Dis
annunciator is off, but the CV annunciator is on.
Turn all outputs off.
Shorts output 2 of the unit.
The CC annunciator is on, indicating that output 2 is in
constant current mode. Output 2 is sourcing current at
its maximum rating, which is the default current limit
setting.
Programs the output 2 current to 1 ampere.
You enabled the overcurrent protection circuit. The
circuit then tripped because output 2 was operating in
constant current mode. The CC annunciator turns off,
and the OCP and Prot annunciators turn on.
You have disabled the overcurrent protection circuit.
The OCP annunciator turns off.
Restores output 2. 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.
Turn-On Checkout - 4
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