Biddle MEGGER - Page 26

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SUPPLEMENTARY INSTRUCTIONS
Selector Switches
Voltage Selector—On heavy duty type
only: Set switch to desired voltage (and
corresponding range). Figure 28.
SOUTERX I
INNERX I
FIGURE
28.
Range
and
voltage
switch
and
associated
control
switch
commonly
used
on
high
range
instruments.
Megohm
Scale,
Divide
by
1
and
Divide
by
10:
Set
switch
to
the
ratio
(~
1
or
10)
that
brings
the
reading
as
near
as
possible
to
the
middle
of
the
scale.
Record
the
nu-
merical
scale
reading
and
the
position
of
the
ratio
switch.
Figures
28
and
29.
FIGURE
27.
Facsim-
Megohm
and
Ohm
Scale:
Set
switch
to
ile
scale
of
a
multi
MEGOHMS
for
insulation
resistance
tests.
voltage,
high-range
(Connect
testing
leads
to
the
Earth
and
Line
instrument,
Cat.
638.
terminals,
and
read
the
Megohm
Scale
500 v X 1, 1000 v ἳ
x
2,
2500
v
X
5.
Figure
30.
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