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ManualsBrandsExtech ManualsCapacitance & Resistance MetersExtech 380193 Passive Component LCR Meter
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380193 V2.1 5/07
6
OPERATING INSTRUCTIONS
CAUTION: Measuring a DUT (device under test) in a live circuit will produce false readings
and may damage the meter. Always remove power and isolate the component from the
circuit to obtain an accurate reading.
CAUTION: Do not apply voltage to the input terminals. Discharge capacitors before testing
Note: Measurement considerations for resistance <0.5 ohms.
1. Use positive contact alligator clips.
2. Perform a SHORT calibration zero to remove stray impedances.
3. Clean the DUT leads / contacts of oxidation or film to minimize contact resistance.
Power
1. Press the power key to turn the meter on or off
2. Auto-Power OFF (APO)
If the keypad is inactive for 10 minutes, the meter will automatically shut down. If this
occurs, press the key to resume operation.
3. Auto-Power Off disable.
To disable the auto-power off feature, from the off position, press and hold the power
on key until “APO OFF” appears in the display. Auto-Power Off will also be disabled
if the MIN MAX record mode is used or if the meter is powered by an external power
supply.
Frequency Selection
Press the FREQ key to select either 120Hz or 1kHz as the test frequency. The frequency
selected appears in the display.
Generally, 120Hz will be used for large electrolytic capacitors and 1kHz used for most
other tests.
Parallel/Series Selection
Press the PAL SER key to select either a parallel (PAL) or series (SER) equivalent circuit.
The selected mode will appears as “SER” or “PAL” in the display.
This mode defines the R loss of an inductor or capacitor as a series loss or a parallel loss.
Generally, high impedances are measured in the parallel mode and low impedances are
measured in the series mode.
Range Selection
The meter turns on in the autoranging mode with “AUTO” indicated in the display. Press
the RANGE key and the “AUTO” indicator will disappear. Each press of the RANGE key
will now step through and hold the available ranges for the parameter selected. To exit the
manual range mode, press and hold the RANGE key for 2 seconds.