Fluke 93 Service Manual page 90

PERFORMANCE
VERIFICATION
PROCEDURE
4-21
5.
Supply current
«•»
All
models
This
lest
checks
the
total
suppl/ current (ScopeMeter
supply
curr^
and
the
bulH-in battery
charger
current).
Test
equipment:
Philips
PE
1537 Power
Supply 0-40V/0-1A
Digital
Multimeter
(Philips
PM
2525
or equivalent)
5
mm
Power
Jack connector
plug with attached cable
(for
example
order
4822
321
20125).
Test set-up:
PHILIPS
PU2S2S
ScopeMeter
Settings/procedu re/requ irements:
NOTE: A
PM
9086
bstl^ry
pack
(inctudad
in
tha
shipment)
has
to
be
installed for
this
test
Only
NiCad
batteries
can be charged b/
the
Scr^eMeter!
A
Set the
power
supply
to
1
5V
DC.
B Check
that the
charging current
Is
200
mA
(typical
reading
on
multimeter).
C
Switch
on
the ScopeMeter.
D
Check
that the
total
supply
current
is
330
mA
(typical
reading
on
multimeter).
6.
Battery
backup
functional test
•••
All
models
This
test verifies
that
the
ScopeMeter
settings
will
be
kept
In
memory
If
power
Is
switched
off
while
the
batteries are
installed.
Test equipment:
none
Test setup:
no
specific test
setup
required
Settings/procedure:
A
Switch on the
ScopeMeter
and
press
the
SCOPE
key
to
get
into
scope mode.
B
Press
the
AUTO
SET
key
and
set
channel
A
and
B
to
500
mV/di
v.
Set
the
timebase
to
1
ms/div.
C
Switch
off
the
ScopeMeter
with the
ON/OFF
key
and
keep
it
switched
off
for
one hour
to
enable
all
capacitors
to
discharge.
D
Press
the
ON/OFF
key
to
switch
on
the
ScopeMeter
again,
and
verify that
the settings for the
timebase
and
attenuator
have
not
changed.
Requirements:
ScopeMeter
settings
at
power
off
must be
restored
the
next time
power
Is
switched
on.