Fluke 8010A - 4-11. Low Ohms PCB Removal (8012 A only); 4-13. Main PCB Access

I
MAINTENANCE
GENERAL
INFORMATION
4-1
1 .
LOW
OHMS
PCB
REMOVAL
(801
2A only)
4-12. Use
the
following
procedure
to
remove the
Low
Ohms
PCB
Assembly
from
the
instrument:
1 .
Perform
the
Calibration
Access
procedure.
2.
Remove
all
three
screws
holding
the
Low Ohms
PCB
Assembly.
3 .
U
nplug
the
LO
RAN
GE O
input lead from the
front
panel
terminal.
4.
Pull
the
ZERO
control knob
off
its extender
shaft.
5.
Unplug
the
seven
wire
cable
at the Low Ohms
PCB
connector.
6.
To
reassemble,
reverse
the previous
procedures
in a
logical
order.
4-13.
MAIN
PCB
ACCESS
4-14. Use
the
following
procedure to
access the Main
PCB
Assembly:
1.
Perform
the
Calibration
Access
procedure.
2.
Remove
the
two
screws
holding
the top
shield
in
place
and
then
remove the
shield. (If
you are
working on
an 80 12
A,
perform
the
Low
Ohms
PCB
Removal
procedure.)
3.
Remove
the
two
screws
from
the
rear of the
bottom
shield and
remove the
bottom shield.
4.
To
reassemble,
reverse
the previous
procedures
in a
logical
order.
NOTE
When
reinstalling
the
Main PCB
Assembly.
ensure
that the
pcb
and the
shield
are
properly
set
in
their
appropriate
guides.
Table
4-1.
List of
Recommended
Test
Equipment
INSTRUMENT
TYPE
REQUIRED
CHARACTERISTICS
RECOMIVIENDED
MODEL
DMM
Calibrator
DC
Voltage: 0 to
1000V
±.05%
AC Voltage: 100
Hz
-
0 to
200V
±.05%
0 to
750V ±.8%
1
kHz
-
0 to
250V
+.05%
10
kHz-
0
to
110V
±.3%
50
kHz
-
0
to
20V
±.5%
John
Fluke
Model
5100A
DC
Current: 0 to
2000 mA
±.04%
AC
Current:
0 to
200
/lA ±.01%
Resistance: 0 to
10 in
steps of
power-of-ten
±.05%
DMM
Read
true rms:
0to12V±1%
John
Fluke
Model
801
OA, 801
2A,
801
2A,
8020
A
or
8000A
Calibration
Leads
One
red, one
black
-
24"
spade lug to
banana
connector
Pomona
1987-24
Low
Ohms
Calibration
Lead
8
inch
patch cord,
male banana to
male
banana
Pomona
1985-8
19 Ohm
Test
Set
1.90
Ohm
Test Set
1 9
±.05%f2
resistance
1 .9
±.05%f2 resistance
See text on
Special
Test
Devices
presented
later
in
this
Section.
-2