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b. If coaxial test leads or a test jig is to be used, connect the item to the
REMOTE STD coaxial connectors.
NOTE:
The inductance of the test leads will be included in the measurement.
c. Determine the approximate inductance value of the test specimen and set the
MULTIPLY C, DIVIDE G/MULTIPLY R, and C/L switches to the positions
indicated in the chart below.
(Do not adjust the CONDUCTANCE control.)
APPROXIMATE VALUE
OF TEST SPECIMEN
MULTIPLY C
SWITCH
DIVIDE G/
MULTIPLY R
SWITCH
C/L
SWITCH
CONDUCTANCE
CONTROL
G-SCALE
25 pH to 250 pH
1
1
C
+1000
250 pH to 2.5 mH
0.1
1
L
-100*
2.5 mH to 25 mH
0.01
10
L
-100*
*
Tenth (red) subdivision on G-scale to the left of zero.
d. Zero-balance the bridge as described in paragraph 3.5.
e. Set the meter switch to ZERO CENTER.
If necessary, adjust the C ZERO FINE
control for a midscale meter indication.
f. Refer to the chart in Step c, above, and set the CONDUCTANCE control to
the required position.
g. Adjust the PHASE control until the meter needle is exactly at midscale.
h. Return the CONDUCTANCE control to zero on the G-scale.
i. If the C/L switch is at L, proceed to Step I.
If the C/L switch is at C, set
it to the L position.
j. Set the meter switch to ZERO LEFT and zero balance the bridge as described
in paragraph 3.5.
k. Set the meter switch to ZERO CENTER.
If necessary, adjust the C ZERO FINE
control for a midscale meter indication.
l. Connect the test specimen to the REMOTE STD coaxial connectors (or to the
test jig or test leads, if used.)
m. Advance the CAPACITANCE control for an exact midscale indication on the
meter.
n. Read the value on the CAPACITANCE dial and convert the value to induct¬
ance using the following equation:
L =
25.33/C
where
75D
b-370
L
= inductance in mH
C = CAPACITANCE dial reading in pF.
31
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