Display Access; Cleaning - Fluke II Series Service Manual

Maintenance
DISPLAY ACCESS
Table 3*1.
Recommended
Test
Equipment
INSTRUMENT TYPE
REQUIRED CHARACTERISTICS
RECOMMENDED MODEL
PREFERRED
DMM
Calibrator John
Fluke 5100B Family
John
Fluke Models
5100B, 5101
B,
5102B, 5700A
ALTERNATE
DCV
Calibrator
DC
Voltage Range:
0
to
1000V
Accuracy: ± .05%
ACV
Calibrator
AC
Voltage
Range:
0
to
750V
Accuracy:
± 0.4%
Frequency Range: 40 Hz
to
1
kHz
Current
Calibrator
DC
mA:
0
to
300
mA
DCA:
0
to
2A
Accuracy:
0.3%
Decade
Resistor
Resistance: 0
to
30
MQ
General Resistance
Accuracy:
± .1%
RDS-77B
Resistance: 0
to
10 M£2
ESI
Accuracy:
0.1%
DB-62
DISPLAY
ACCESS
3-3.
CAUTION
Do
not handle the conductive
edges
of the
LCD
interconnects.
If
contaminated, clean
with alcohol.
Refer
to
Figure
3-1.
1.
Remove
the four Phillips screws from
the
back
side of the pea.
2.
Remove
the
LCD
mounting
bracket.
3.
Insert a small screwdriver under
the edges of
the display holding
bracket,
and
gently
pry
the bracket loose
from
the snaps.
4.
Turn
the bracket upside
down
to
remove
the
LCD.
5.
Before
installing a
new LCD, make
sure
that
all
connector
contact points are
clean.
CLEANING
3.4.
CAUTION
To
avoid
damaging
the meter,
do
not use aromatic
hydrocar-
bons
or chlorinated solvents
for cleaning.
These
solutions
will
react with the plastics used
in
the instruments.
Do
not allow the
LCD
to
get wet.
Remove
the display
assembly
before
washing
the
pea and do
not
install until
the
pea
is
completely
dry.
Do
not
use
detergent
of
any
kind
for cleaning the pea.
Do
not
remove
lubricants
from
the switch
when
cleaning the
pea.
3-4