I got pulled into a Receiving Inspection problem. Our test instrument, an old HP 4192A impedance meter, and a newer Instek 6020 tell us that our X5R capacitors are out of spec. A 100uF, 10%, 6.3V capacitor measures between 25% and 30% below the nominal value. The instruments have Kelvin probes and are zero calibrated at frequrency, 120Hz the test waveform is 500mV rms. Does anyone have any advise?