Advertisement
volts, slowly increase the AC voltage until you read 10volts.
Do not change this voltage setting until you havecompleted
the measurements in
step
3.
.
3.
Connect
the.
unknown inductor
(drawn
as a rectangular box
marked
L OR
C)
as shown in Figure 3. Note
the
voltage on
the
10 volt scale. Use TABLE 1 to determine the
inductance
in
the
circuit from the voltage read on the
meter. You
can
interpolate
between
values if the actual voltage read on the
meter
is
not indicated on the
table.
TABLE 1.
VOLTAGE TO INDUCTANCE CONVERSION
(4 HENRYS TO 2000 HENRYS)
INDUCT·
RMS
VOLTS
INDUCT·
RMS VOLTS
ANCE (H)
ANCE
(H)
9.88
4
3.14
80
9.83
5
2.81
90
9.75
6
256
100
9.67
7
216
120
9.57
8
1.86
140
9.47
9
1.63
160
9.35
10
1.45
180
7.99
20
1.31
200
6.63
30
0.88
300
5.52
40
0.64
400
4.67
50
0.53
500
4.04
60
0.27
1000
3.52
70
0.13
2000
HIGH CAPACITANCE
MEASUREMENTS
(.005 TO 1 MFD)
1.
Connect the circuit shown in Figure 2, using a 12- or
12.5-
Kohms resistor.
2.
Set the
RANGE switch to 10 ACV, and the V-n-A slide
switch to
v·n-A.
Connect
the test leads
acrossthe
secondary
of the transformer. Starting at zero.volts, slowly increasethe
-12-
-13
-
AC voltage until you
read
10 volts.
Do not change this
voltage setting
until
you have
completed the measurements
in
step 3.
3. Connect the capacitor (drawn as a rectangular box marked
L
OR C) as shown in Figure
3.
Note the voltage on the 10volt
scale.
Use TABLE 2 to determine the capacitance in the
circuit from the voltage read on the
meter.
You can inter-
polate between values if the actual voltage read from the
meter is not indicated on the
table.
TABLE
2.
VOLTAGE TO
CAPACITANCE
CONVERSION
(.005 MFD TO 1 MFD)
RMS VOLTS
CAPAC
1-
RMS VOLTS
CAPACI-
TANCE (mtd)
TANCE (rnfd)
.19
.005
4.67
.14
.32
.009
5.15
.16
.38
.01
5.61
.18
.73
.02
6.01
.2
1.11
.03
6.86
.25
1.49
.04
7.49
.3
1.85
.05
8.34
.4
2.21
.06
8.83
.5
2.55
.07
9.14
.6
2.87
.08
9.35
.7
3.20
.09
9.50
.8
3.52
.1
9.58
.9
4.12
.12
9.67
1
LOW CAPACITANCE
MEASUREMENTS
(100 TO 50,000 PF)
1.
Connect the circuit shown in Figure 2, using a 310,000-
ohm resistor.
2.
Set
the RANGE switch to 250 ACV and the V-n-A slide
switch to
V-n-A.
Connect the test leads acrossthe secondary
Advertisement
