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toggle between lower than 40 mF and higher than 40 mF
capacitance measurements. To speed up the settling of the
readings, short the capacitor leads for 2-3 seconds before the
measurements.
•
Push Joystick down for 1 beep to toggle the test signal level
between 1.0 Vrms and 0.1 V Vrms
Discharge Capacitors
This mode is designed to measure DC resistance, parameters of
Diodes/LEDs, and diode leakage currents. Besides, it allows
measuring a shunt resistor on a board that can be used for
evaluating the current via that shunt in a live circuit.
•
Press joystick to open the main menu, select RDC+LED mode
and press the joystick again.
•
Before making any measurement, push the joystick to the right
for 2 beeps to calibrate with open and short probes to
eliminate the offsets.
Four sub-modes can be selected: Auto, Diode, R test at 1.3 V DC,
R test at 100 mV DC.
To select the Auto Mode push the joystick down.
In the Auto mode resistances and diodes are automatically
detected. For resistors the bottom line displays the resistance of
the connected element, at the top the current
Ir
flowing through
it. For diodes, the polarity of the diode, the voltage drop in the
open state and the reverse current
Ir
are displayed.
To select the Diode Mode push the joystick left. If you push left
once again, the diode polarity reverses.
Diode mode is used for LED/diode parameter extraction using DC
bias. It is recommended for in-circuit characterization of p-n
junctions. The screen displays the voltage drop in the open state
when the forward bias is applied. If the reverse bias is applied,
OL is displayed instead. Push the joystick to the left and hold for
1 beep to change the polarity of the probes.
7.3.3 R test at 1.3 V and R test at 100mV
To select the R-test Mode push the joystick up, resistor symbol
will be displayed in the top left corner. If you push up again, the
Summary of Contents for LCR-Reader MPA
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