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SECTION 2
Gettim Started
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that configure
the instrument
for immediate
meas-
urements.
NOTE
The instrument
is ready for immediate
use.
However,
to achieve rated accuracy,
the in-
strument must be allowed to warm up for at
least l/2 hour.
2.3
BASIC MEASUREMENTS
A measurement
is performed by applying a known rms
signal level at a specific frequency
to the DUT and then
calculating
and displaying
the results.
NOTE
The following procedure assumes that the in-
strument
is configured
to its power-up
de-
fault conditions.
If you are not sure about the
setup configuration,
simply turn the power
off and then on again.
NOTE
The following procedure uses the Model 3323
Test Fixture to connect DUT to the instrument
(see Figure 2-l). If using test cables, make sure
4-terminal
connections
are used as explained
in paragraph 3.4.
Perform the following steps to make basic L, C or Z meas-
urements:
1. Connect the Model 3323 Test fixture to the instru-
ment. This test fixture
allows easy DUT connection
to the instrument,
and provides
accurate measure-
ments by eliminating
the stray capacitance of test ca-
bles.
2. Note that automatic function is selected as denoted
by the AUTO annunciator
to the left of the yellow
AUTO key. In AUTO function, the instrument
will
automatically
select the appropriate function (L, C or
Z) for the device connected to it.
3. Install the DUT (device under test) into the test fix-
ture. The appropriate
function for the DUT will be
selected and the measurements
will be displayed as
follows:
NOTE
The exponent symbol annunciators
(p, n, u, m,
k and M) for the readings
are located to the
right of each display.
A.
B.
C.
For inductors
(L), the m
DISPLAY
provides
the reading in henries (H), and them
DISPLAY
provides the quality factor (Q).
For capacitors
(C), the m
DISPLAY
provides
the reading in farads (F), and them
DISPLAY
provides the dissi
ation factor (D).
For resistors, the
A
i!!b
DISPLAY
provides the Z
reading in ohms (a), and them
DISPLAY pro-
vides the phase shift (0) of approximately
0".
The above procedure requires no instrument
settings by
the operator. The test is completely automated by simply
using the power-up
default setup configuration
to test
DUTs. Of course this setup configuration
is not desirable
for all measurements
and thus, requires the operator to
modify appropriate
operating
parameters,
such as the
test signal level and frequency.
The test signal level and frequency can be modified as fol-
lows:
Signal Level -
On power up, the test signal level is set to
1V rms as denoted by the front panel 1V LEVEL annun-
ciator. To select the alternate signal 1eveL (50mV rms),
simply press the 50mV LEVEL key on the front panel.
Signal Frequency -
On power up, the test frequency
is
set to 1kHz as denoted by a FREQ annunciator.
To select
one of the other frequencies
(lOkHz, 1OOkHz or 120Hz),
press and release the appropriate
FREQ key.
2-2
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