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This can result unexpected deviations f
impedance measurements higher frequencies, typically above 100 kHz.
Note: Shielding conductors the coaxial test cables ust connected neither each other nor ground
potential GND. Do
not allow any other connection the shielding conductors !
Note: Some types LCR meters and impedance analyzers not eet requirements ffour terminal pair
principle, especially connection shielding conductors.MEATEST M550 Impedance Calibrator
l cur pot pot cur
I
Fig. lt, lin lim P
c fig tio d
b fig tio fig tio tric tly tio t
o .
U lib st, fig.
Non correct interconnection the coaxial test cables results sensitivity mutual position all four
test cables result fmeasurement, typically frequencies above 100 kHz.
Operation manual 18
. 7.
Shielding conductors the front panel BNC connectors are interconnected inside the calibrator. Principle 4TP test lead connection
T irc tru t’s cur re
iso tin rre t
lo sig rre flo cur e
in cur sig e
L cur cur rre flo ite ire tio rs
o tic flu lle r
s (e). the shielding conductors are not interconnected properly, accurate loop current does
not flow through the cables and, result, the easurement range will limited, some cases,
measurements cannot made
