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SECTION 2
OPERATION
2.1 INTRODUCTION
Operation
of the Model 617 may be divided
into two general
categories:
front panel operation
and IEEE-488 bus operation.
This section contains
information
necessary
to use the instru-
ment
on a front-panel
basis. Note that many
of these func-
tions
can also be programmed
over
the IEEE-488 bus,
as
described
in Section 3.
The following
paragraphs
contain
a complete
description
of
Model 617 front panel operation.
First a complete
description
of each front and rear panel function
is presented.
Next the
complete
procedure
for each of the measuring
functions
is
presented,
followed
by a description
of the built in voltage
source.
Finally,
the analog
output
and guard
functions
are
described
along with a method
to apply external
feedback.
2.2 POWER UP PROCEDURE
Use the procedure
below
to connect
the Model
617 to line
power and power up the instrument.
1. Connect
the female end of the power cord to the AC recep-
tacle on the rear panel of the instrument.
Connect
the other
end of the cord to a grounded
AC outlet.
WARNING
The
Model
617 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
connec-
tions are made,
instrument
chassis
is con-
nected
to power
line ground.
Failure to use
a grounded
outlet
may result in personal
in-
jury or death
because
of electric
shock.
CAUTION
Be sure that
the power
line voltage
agrees
with
the indicated
range
on the rear panel
of the
instrument.
Failure
to observe
this
precaution
may
result
in
instrument
damage.
If necessary,
the line voltage
may
be changed
as decribed
in Section
7.
2. Turn on the power by pressing in the front panel POWER
switch. The switch will be at the inner most position when
the instrument
is turned on.
3. The instrument
will power up in the volts function,
in the
autorange
mode aqd with zero check enabled,
as indicated
by the associated
front panel LEDs. All other LEDs will be
off when the instrument
is first turned
on.
2.3 POWER UP SELF TEST AND DISPLAY
MESSAGES
The RAM
memory
is automatically
tested
as part of the
power up procedure.
If a RAM memory
error occurs, the "rr"
message will remain
on the display.
If the instrument
was not
able to read the stored
calibration
constants
and configura-
tion, the decimal points in the two exponent
digits will flash.
If such errors occur,
the instrument
may be partially
or com-
pletely
inoperative.
Refer to Section
7 for more complete
details.
A power
up self test may be run and the software
revision
level may be displayed
by pressing and holding
the TRIG but-
ton when the unit is first turned
on. During
the test, all front
panel LEDs and the display segments
will turn on as in the ex-
ample below:
The instrument
will then display
the software
revision
level
when TRIG is released,
for example:
E.4
The instrument
will then enter the diagnostic
mode, which is
used as an aid in troubleshooting
problems
within the instru-
ment. See Section 7 for details. The power must be turned off
to remove
the instrument
from the diagnostic
mode.
NOTE
If the instrument
is still under
warranty
(less
than one year from the date of shipment),
and
problems
develop,
it should
be returned
to
Keithley
Instruments
for repair.
See paragraph
1.11 for details on returning
the instrument.
2-I
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