Fluke 93 Service Manual page 99

CALIBRATION
ADJUSTMENT PROCEDURE
5-3
Connect
the ScopeMelerto
th©
Power
Adapt®
r/Battdry
Charger
PM
8907.
Use
MASTER RESET
to
switch the
ScopeMeter
on. {To
do
this
press the
LCD
key and keep
rt
pressed.
Then
also press
the
ON/OFF
key.
When
the
ScopeMeter
switches
on,
you
wili
hear
two
beeps.)
Now
press both
AC/DC/GROUND
keys simultaneous^.
This
will
start the
SERVICE menu
(see
figure 4.1
,
chapter
4),
This
menu
allows you
to
start
the
calibration
sequence. Press
the
corresponding
softkey
marked
"CALIBRATE
ScopeMeter". This
will start
the
CALIBRATE
menu.
NOTE:
The ScopeMeter
will
show
the
message:
"Space
for
X
more
calibration sessions.
"(X
is:
2.
1.
or
0}
After three electronic
calibrations, the
ScopeMeter
will
display:
"Space
for
0
more
calibration
sessions". This
means
that
the
internal
Flash
ROMs
of
the
ScopeMeter
are
full.
To enable another
calibration,
you must
first
empty
the Flash
ROMs
and
reinstall the
ScopeMeter ope
rati rtg
software.
To do
this,
send
the
ScopeMeter
to
your nearest Service
Center.
It
is
also possible to
'refresh*
the
FlashROMs
by yourself,
using
a
PC. For
more
Informatlort:
contact your nearest Service
Center.
5.4
OPERATING THE CALIBRATION PROCEDURE
Softkeys
in
the
CAUBRATE
menu
In
the
CALIBRATE
menu,
H
is
possible
to
choose the
calibration
mode
(sequence)
to
be performed.
Press the softkey
marked:
•
CONTRAST
for
the
CONTRAST
Cdilbratlon
Adjustment Procedure
(see section
5,5).
•
SCOPE
for
the
SCOPE
Calibration Adjustment Procedure
(see section
5.6).
•
METER
for the
METER
Calibration
Adjustment Procedure
(see section
5,7).
When
one
of
^ese
three
calibration
sequences
is
chosen,
the
corresponding
text
on
^e
screen
will
be
shown
in
reverse. This
shows
that this calibration
mode
is
active.
If
you
press
the
ESCAPE
softkey, the
ScopeMeter
will
leave the
CALIBRATE menu
and
return to the
SERVICE
menu.
NOTE:
If
you use
the
ESCAPE
softkey
to
leave the
CAU8RATION menu
before
storing the
calibrations with
the
CAL
STORE
softkey
you
will
lose
all
new
calibration values.
The
instrument
will
continue using
the calibration
values
that
were
used before entering the
CAUBRATE
menu.
The
CAL STORE
softkey
saves
the
new
calibration
values
that
are obtained
in
the
CONTRAST
SCOPE
Of
METER
sequences,
to the Flash
ROM.
From
the
moment
you press
the
CAL STORE
softkey,
the
ScopeMeter
uses
the
new
caftbration data.
The
old calibration data
is
no
longer
valid.
This
will
also
fill
one
calibration
field in
the
Flash
ROM.
See
secticn 5.3.
NOTE:
After calibrating
the
ScopeMeter,
reset
the
instrument (use
a
MASTER
RESET),
before
performing
measurements.
Keys
In
CONTRAST, SCOPEs
or
METER
Caiibraiion
mode
The
calibration
is
presented as a sequence. You can advance
through
this
sequence
by pressing
the
select/adjust keys. Pressing the upper
select/adjust key
advances one
step; pressing the
tower
adjueVselect
key
brings
you back one
step.
In
sections
5.5,
5.6
and
S.7
this figure
is
used
to indicate
that
one
of
the
select/adjust
keys (up/down) must be pressed
to
display the indicated step
number
V
displayed
on
the ScopeMeter
screen.