G) Equivalent Switching Circuit - VOLTCRAFT LCR-400 Bedienungsanleitung

Calibration with closed measuring inputs:
Push the "CAL" button. Four dashes and "Srt" are displayed.
Push the calibration plug "Shorting Bar" (observe the labels)
in the integrated measuring terminals or short-circuit the two
measuring lines, or push the two measuring prods together with
the SMD tweezers.
Push the button "CAL". Now one, two, three and then four
dashes are shown in sequence. After approx. 30 seconds
elapse, the status is displayed.
"PASS" partial calibration successful.
"FAIL" partial calibration failed.
In this case, check all contact points for contamination and
possible damage at the measuring lines and repeat the entire
calibration process.
After successful calibration with closed measuring inputs, push
the button "CAL". The calibration mode is terminated and the
measuring device returns to measuring operation.
The calibration process can be cancelled with the operat-
ing button (2) at any time. Calibration should, however,
always be performed completely and without interruption.

g) Equivalent switching circuit

In "AUTO-L", "AUTO-C" and "AUTO-R" operation, the measuring
functions are recognised as serial or parallel circuit. This depends on the entire equivalent impedance of the circuit.
The following parameters are used for differentiation in the serial and parallel circuits:
Impedance > 10 kOhm
Impedance < 10 kOhm
Serial and parallel modes can be manually switched with the button "SER/PAL" (11). Each push switches the func-
tion. The auto mode is switched off. To switch on the auto mode again, select the desired measuring function with
the button "FUNC" (3).
Real capacities, inductivities or resistors are not ideal components for measuring the pure blind and effective
resistance. Usually effective resistance and blind resistance exist at the same time. Suitable impedance can
be simulated with an effective resistance and another component (coil, capacitor) in serial or parallel circuit.
38
Parallel mode
Serial mode
Display Lp, Cp or Rp
Display Ls, Cs or Rs