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Model 3550 LCR Meter Instruction Manual Operating Instructions
Operating the 3550 cont’d:
Measuring Inductance (L), Capacitance (C) and Resistance (R) cont’d:
Notes of Caution for Inductance (L) Measurement
For low inductance measurements, 5 Terminal Measurements are required to minimize
series resistance and inductance errors. Margins of error for 3 terminal measurements on
low inductances will add significant error to the reading.
When performing measurements on small coils with a core, it is possible that the measured
inductance value will vary with a change in test signal level. Take extra caution to match
the test signal level of other machines in order to obtain matching results.
Keep metal objects away from the DUT when performing measurements. The presence of
metal objects in close proximity can affect the measured value. Especially in coils with air
or other low permeability cores.
Notes of Caution for Capacitance (C) Measurement
For large capacitance measurements, 5 Terminal Measurements are required to minimize
errors caused by series resistance and inductance. Margins of error for 3 terminal
measurements on large capacitances will add significant error to the reading.
!
Always make sure that capacitors are completely discharged before connecting to the
3550 measurement terminals otherwise erroneous readings or damage to equipment could
result.
Notes of Caution for Resistance (R) Measurement
For low resistance measurements, 5 Terminal Measurements are required to minimize
series resistance and inductance errors. Margins of error for 3 terminal measurements on
low resistance will add significant error to the reading.
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