Fluke 93 Service Manual page 89

4-20
PERFORMANCE
VERIFICATION
PROCEDURE
4.
Power
supply
voltage
range
•**
Ail
models *'•
Th^
test
checks
the correct operation of the
ScopeMeter
within the
boundaries
of the
DC
supply
voltage.
Test
equipment:
Philips
PE
1537 Power
Supply 0-40V/0-1A
Tektronix
SO
503
Constant Ampittude Sine
Wave
Generator
5
mm
Power
Jack connector
plug with
attached cable
{for
example
order
4622
321 20125)
Test set-up:
ScoQ«Uetar
Settl
ngs/proeed
ure
A
Insert the
power
plug
into
the
power
adapter
contact
on
the
side of the
ScopeMeter.
B
Switch on
the
power
supply
and
set the voltage to
a
wanted
value
between 8 and 20V
DC.
C
Apply a 50
kHz
sine
wave
v/tth
an
amplitude
of
100
mV
peak-to-
peak
to
channel
A.
Use
a
SOD
termination.
D Swich
on
the
ScopeMeter. At power
on, a
beep
tone
must be
audible.
E
Press
AUTO SET
and
verify that
a
well triggered signal with
an
amplitude
of
approximately 5
divisions
is
displayed over the whole supply
voltage range.
Requirements:
A
The ScopeMeter must
start at
any
DC
voltage
between
3
and
20V, applied
at
Its
power
adapter
contact.
B
The ScopeMeter must
remain
operative over
the indicated voltage range.
C
The
amplitude
of the trace displayed
must be
approximately
5
divisions,
independent
of
the
supply voltage.
Figure 4.10
Power
Jack connector