19
MEASUREMENT FEATURES
This section describes specific ST functions and settings.
Measuring resistance
Covers resistance measurements.
Measuring capacitance
Covers capacitance measurements.
Measuring inductance
Covers inductance measurements.
Testing diodes
Describes testing
general-purpose diodes.
MEASURING SMALL RESISTANCE
There is some small resistance offset due to the resistance of
the tweezer tips, and resistance of the contacts between the
tips and DUT. Typical offset value is less than 25 mΩ and may
increase if the gold on the tweezer tips wears out.The offset
value should be used in calculation of the actual resistance.
MEASURING CAPACITANCE
Test frequency
0.1kHz/1 kHz/10kHz/120Hz
Test signal amplitude
0.5/1.0 Vrms Sine wave
Source impedance
100 Ω
Test period
1 Sec (default)
Equivalent circuit diagram Parallel (C < 500 pF),
Serial( C > 500 pF)
In AUTO mode the Smart Tweezers first tries to perform
measurement at 1kHz and then automatically selects the best
test frequency. The device is capable of measuring capacitance
from aproximately 3 pF to 199 μF in AUTO mode.
To measure capacitance lower than 4 pF select 10kHz test frequency
manually. To measure capacitance higher than 200 μF use 100Hz or 120Hz.