Model SR715 Model SR720 LCR Meters
Model SR715 Model SR720 LCR Meters
Model SR715 Model SR720 LCR Meters
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PERFORMANCE TESTS5. Capacitance MeasurementThis verifies that the <strong>SR715</strong>/720 is able to measure components at different frequencies. The limits of thereadings are the same as before (± [component tolerance + meter tolerance]).1) If the fixture configuration has been changed, perform open and short circuit calibration.2) Set the <strong>SR715</strong>/720 to C+D, parallel, 1 kHz.3) Install the 22 nF capacitor. Verify that the unit reads within 1.10% (<strong>SR720</strong>) or 1.25% (<strong>SR715</strong>). Verifythat D is below .0001.4) Set the unit to 100 Hz. Verify that the capacitance reading is close to the value measured above andwithin the tolerance stated above. Repeat for 120 Hz. D values should be below .0001.5) Repeat for 10 kHz and 100 kHz (<strong>SR720</strong> only). At 10 kHz the tolerance is 1.15% (<strong>SR720</strong>) or 1.35%(<strong>SR715</strong>). For 100 kHz the tolerance is 1.25% (<strong>SR720</strong> only). D values should be below .001 for 10 kHzand .01 for 100 kHz.6. This completes the functional tests.5-3
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