GE 4EX3A11 Maintenance Manual page 5

.
tooo
!lo"/"
SENSITIVITY
SWITCH
EIII
+
o80
Place the Test Selector switch
in the
VM
position, the
Meter
Sensitivity switch in the 1-Volt
position, and the Polarity switch
in the
tt+rr
posi
tion.
Connect the three calibration rs-
sistors
and
a
f
resh
1-1
/2-YoLt,
rrDtr
celI as
shown
in Figure
1.
App1y the test probes as
shown
and
note the exact meter
reading
DI
SASSEMBLY
Figurel-CalibratlonSetup
GENERAL ELECTRIC COMPANYo MOBILE COMMUNICATIONS DIVISION
WORLO HEADOUARTERS o LYNCHBURG, VIRGINIA 24502
U.S.A.
(should be approximately 90
on
the top meter scale).
5
"
Now
move
the positive test
probe
to point ?'A'(junction of
133-ohm
and
L4
"7-ohm
resistors) .
Then,
hold
down
the
HIGH SENSITMTY
swj.tch and
adjust
R9
for the
exact
reading obtained in Step 4,
Re-
peat Steps 4 and 5 until
meter
readings are the
same, and replace
the
back
plate.
LBT4454
2.
3.
4.
GENERAL
@
ETECTRIC.
Trademark of General Electric Company
U.S.A.
Printed in
U.S.A.
u.s.A.