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AD2817C Operation Manual
Note: Suffix "s" means series; suffix "p" means parallel.
The real-world capacitor, resistor and inductor are not ideal, but component of complex
impedance in the form of serial connection or parallel connection. The instrument
calculates necessary values according to equivalent circuit connected in series or parallel.
And different result will be obtained in different circuits, differing in different components.
Two equivalent modes can be conversed through some formulas, and Q and D don't
change in different modes, as shown in the above figure.
Generally speaking, component with low impedance (such as large capacitor and small
inductor) is usually measured in series mode, and component with high impedance (such
as small capacitor and large inductor) is usually measured in parallel mode. And the
equivalent mode can be decided according to the application of component. If a capacitor
is used for power filtering, series mode is the best choice, and if it's used for LC oscillat
circuit, parallel mode should be selected.
2.1.4 Range
Auto, Manual
9 ranges for LCR measurement
10 ranges for DCR measurement
2.1.5 Trigger mode
Internal, External, Manual, Bus
Internal:
When the trigger mode is set to INTernal trigger mode, the instrument
continuously repeats measurements.
External:
When the trigger mode is set to EXTernal, the instrument performs a single
measurement every time a low-to-high transition TTL level signal is applied to
the Handler interface on the rear panel.
BUS:
When the trigger mode is set to BUS trigger mode, the instrument performs a
single measurement every time the *TRG common command is sent to
AD2817C via GPIB. The BUS trigger mode cannot be set on the front panel.
Send the TRIGger:SOURce BUS command via GPIB or RS232C to set the
trigger mode to the BUS trigger mode.
Manual:
When the trigger mode is set to MANual trigger mode, the instrument performs
D=2SFCsRs=1/Q
Q=Xs/Rs, D=Rs/Xs, Xs=1/2 FCs=2 FLs
8
2
Cp=Cs/(1+D
)
2
2
Rp=Rs(1+D
)/D
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