RK2811D measures two components of the complex impedance parameters at the same time in a measurement cycle. The primary and secondary measurement parameters are listed as follows.
Primary Parameter
L: Inductance
C: Capacitance
R: Resistance
|Z|: Absolute value of impedance
Secondary Parameter
D: Dissipation factor
Q: Quality factor
θ : Phase angle
X : Reactance
ESR: Equivalent series resistance
|Z| is the absolute value of impedance, so it is always a positive value; While L/ C/ R maybe a positive value or sometimes a negative value.
When measurement function is C-D and the primary parameter measurement result is negative, this means the component under test is probably an inductor.
When measurement function is L-Q and the primary parameter measurement result is negative, this means the component under test is probably a capacitor.
When measurement function is R-Q and the measurement result of resistor is negative, this is due to over zero correction, please perform open and short correction correctly. 

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