Telescoping Gauges; Multimeter; Voltage - Polaris 1999 Sportsman 400 Service Manual

GENERAL INFORMATION
Volt meter
t z-vct t batt ery
damage the bore surface. Care fully remo ve the
gauge and mensure the outside dimension of the
gauge with a microm eter. Sec Outside Micrometer
in this chapter.
Telescoping Ga uges
A telescoping gauge is used to measure hole di-
ameters fro m approx imate ly 8 mm (5/ 16 in.) to 150
mm (6 in.). For examp le, they could be used to mea-
sure brake ca lip er bore a nd cy linder bore dia me ters.
Like the sma ll hole ga uge. the te lescoping gau ge
does not have a sca le fo r direct read ing s. An out side
23
micrometer must be used together with the tele-
sco ping gauge to determine the bore dimen sion .
Select the correct size telescoping gauge for the
bore to be measured. Compress the movable side of
the gauge post and care fully install the gauge into
the bor e o f the co mponent to be measur ed, then re-
lease the movab le post against the bore. Carefully
move the ga uge aro und in the bore to mak e sure
it
is
centered. Tight en the knurled end of the gauge to
hold the mo vab le gauge post in this position. Care-
fully remove the gau ge and measure the outside di-
men sion o f the gauge post s
with
a mic rometer. See
Outside Micrometer
in this chapter.
Mulrhueter
Th e
multimetcr is a
va luabl e tool
for all
electrica l
system troub leshooting ( Figure 32) . The vo ltage
application is used to indicate the voltage appli ed or
available to various electr ical com ponent s. The
ohmm eter portion of the meter is used to check for
co ntinuity, or
lack of
co ntinuity, and to measure the
resis tance of a component.
Voltage
Voltage is the pre ssure in an electr ical circuit. Th e
more pre ssu re (vo ltage ) in the c ircuit, the more
work can be acco mpli shed. Alw ays measure volt-
age in a simple parallel co nnection. Th e con nection
of a voltmeter directl y to the negati ve and pos itive
terminals of a battery is an examp le of
a
parallel
co nnec tion (Figu re 33) . Nothing must be discon -
nected to make
a
para llel connection.
Direct current (DC)
voltage mea ns that elect ricity
flows in one direction onl y. All circuits powered by
a
battery
arc
DC circ uits.
Alternating c urrent (AC) means that the electric-
ity flows in one direction mom entari ly then
sw itche s to the opposite di rection.
The
frequency at
which AC vo ltage ch anges dire ction is referred to as
hertz. In mot orcycle, or
ATV.
applicati ons, cha rging
system output is
AC voltage
until the AC is co n-
verted to DC for storage in the batte ry,
Since resistance causes voltage to drop. resis-
tance can he mea sured on an act ive circuit using a
vo ltme ter. Th is is
called
a
voltage drop tes l. Ba-
sically, a vo ltage drop test compares
the
volt age at
the beginning of a c ircu it to the vo ltage ava ilable at
the e nd of the circuit whil e the circuit is bein g oper-