SECTION 3
Front Panel Operation
Table 3-2. Lie Fuse Selection
3. Install the new fuse and the fuse carrier into the
holder by reversing the above procedure.
3.2.3 Power Cord
Connect the female end of the power cord to the ac recep-
tacle on the rear panel of the instrwnent. Connect the
male end of the cord to a grounded ac outlet.
WARNING
The instrument is equipped with a 3-wire
power cord that contains a separate ground
wire and is designed to be used with
grounded outlets. When proper connections
are made, instrument chassis is connected to
powerlineground.Failoretouseagroonded
outlet may result in injury or death due to
electric shock.
CAUTION
Be sure that the power line voltage agrees
with the indicated range on rear panel line
voltage switch. Failure to observe this pre-
cautionmayresultininstnrmentdamagenot
covered by the warranty.
3.2.4
Power Up Sequence
To hxn on the instrument, depress the POWER button.
During the power up cycle, the unit will perform the fol-
lowing:
1. Theinstrumentwillperformself-testsonitsmemory
elements. If a failure occurs, one or more of the fol-
lowing error messages will be displayed:
ROM ERROR
RAM ERROR
NO DEFLTS
UNCAL
The displayed error message can be cleared by press-
ing any front panel key. However, a problem exists
and needs to be rectified (see troubleshooting infor-
mation in the Section 7). A brief explanation of any
displayed error message is contained in Table 3-4.
NOTE
If the instrument is still under wsrrsnty and a
problem develops, it should be returned to
Keithley Instzuments, Inc. for repair.
2. Assuming the unit successfully passes the self test, it
will then briefly display the firmware revision level.
For example:
REV AO0.4
The revision level of your unit will probably be dif-
ferent. In any case, the revision level should be re-
corded in case it becomes necessary to replace the
fhmware in the future.
3. Next, the progr-ed primary address will be dii-
played as in the following example:
IEEE-%
ADDRZ!
Atthefactory,theIEEEaddressoftheMode1486and
487 is set to 22. Jf If the address has been changed by
the user, then that address value will instead be dis-
Play*.
4. The unit will then begin normal operation in accor-
dance with the power up cotiguation discussed in
the next paragraph.
3.2.5
Default Conditions
Default conditions can be defined as the setup conditions
that the instrument will return to when it is powered up
(or when a DCL or SDC command is sent over the bus).
The instrument will return to either factory default con-
ditions or user saved default conditions.
3-2
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