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Model 3550 LCR Meter Instruction Manual Operating Instructions
Operating the 3550 cont’d:
Measuring Impedance (|Z|) and Admittance (|Y|)
1) Always perform a zero correction procedure if the condition of the test leads/fixture has
changed. This procedure must be performed before making a measurement. Refer to “How to
Perform a Zero Correction” for more details.
2) Press the [A] key in the “DISPLAY A-B panel to select "|Z|" or "|Y|".
3) Press the [FREQ] key and adjust the frequency using the [UP] or [DOWN] keys or by manually
entering a new value for test frequency. See [SHIFT] ĺ [0]: “Frequency Set Mode” for more
details on manually setting the test frequency. The measurement frequency will be displayed on
DISPLAY C.
4) Press the [V] key, and adjust the measurement voltage using the [UP] or [DOWN] keys or by
manually entering a new value for test frequency. See [SHIFT] ĺ [1]: “Test Voltage Set Mode”
for more details on manually setting the test frequency. The measurement voltage will be
displayed on DISPLAY C.
5) Press the [AUTO] key in the RANGE panel and verify that the “AUTO” LED is on. This puts the
3550 in AUTO range.
NOTE: When repeatedly measuring DUTs with similar values selecting the manual mode allows the
measurement time to be reduced by eliminating the time needed for switching the ranges. See
"RANGE" Selection Panel” for more details.
6) Press the [INT] key in the TRIGGER panel and verify that the “INT” LED is on. This will
continuously trigger the 3550 and update the reading shown on DISPLAY A at a rate determined
by measurement frequency, delay time, number of averages, and the time taken to auto range. If
MAN/EXT trigger mode is selected the reading will not be updated until a new trigger is received
from the front panel or remote interface.
7) Connect the DUT to the measurement terminals. The RANGE will be automatically selected by
the 3550. The |Z| or |Y| reading will be shown on DISPLAY A.
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