Resistance Measuring - VOLTCRAFT LCR-300 Operating Instructions Manual

8.4. RESISTANCE MEASUREMENT
Make sure that all circuit parts, circuits and components and other objects of meas-
urement are disconnected from the voltage and discharged.
Switch on the measuring device at the operating button (2).
Select the measuring input for your purpose and perform calibration.
After switching on, the smart "AUTO LCR" mode is always active. Many settings are performed by the
measuring device, so that the buttons "D/Q/ESR" (9), "SER/PAL" (11), "SORTING" (6) and "REL%" are
inactive. The main display shows the inductivity value, the subdisplay the phase angle "θ".
If this is not desired, select the measuring function "AUTO-R" via the button "FUNC" (3). The main
display shows the measured value (AC-R). The subdisplay is not active in this measuring function.
The measuring frequency can be selected with the button "FREQ" (12). The following values are avail-
able: 100 Hz, 120 Hz, 1 kHz, 10 kHz, 100 kHz. Every time you press it, the measured value switches.
The measuring frequency also determines the measuring range.
Switch between serial and parallel modes with the button "SER/PAL" (11). This function deactivates
AUTO mode. To return to AUTO mode, push the button "FUNC" several times until the corresponding
measuring function is displayed again.
If you want to measure direct current resistance (DC-R), select the measuring function "DCR" via the
"FUNC" button. In this function, the subdisplay and buttons "D/Q/ESR", "SER/PAL" and "FREQ" are not
active.
Connect the measuring object (resistance) to the measuring input. After a short time the display shows
the resistance. Wait until the displayed value has stabilised. This may take several seconds.
Shielded components can be connected to the integrated measuring contacts. The fi gure shows the
option of connecting the shield to the GUARD sockets on demand.
If "OL" (overload) appears on the display, you have exceeded the measuring range. If required, select
another measuring frequency with a higher measuring range.
Remove the measuring lines from the object to be measured after completion of the measurement and
switch off the measuring device.
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