Operation 150821/A4 Page 27 of 110
Repeatability: The difference between successive measurements with no changes
in the test setup or test conditions.
Reproducibility: Similar to repeatability but adds the element of what could be
expected under real life conditions. Reproducibility would take
into account the variability in thing like fixturing where the DUT
being tested is removed from the fixture and then inserted again.
Resolution: The smallest value that can be shown on the display in a digital
instrument. LCR meters typically specify a measurement range
that is the largest and smallest value that can be shown on the
display.
Source Impedance: A constant source resistance of the measuring instrument used to
level the voltage across the DUT to a constant voltage.
Speed: The rate at which the instrument makes a measurement in
measurements per second. Speed is inversely proportional to
accuracy.
Trigger: The device for initiating the test (applying the voltage or current).
External: The test is initiated via an external source such as a computer with
an IEEE-488 or Handler interface. One measurement is made each
time the external trigger is asserted on the handler.
Internal: The instrument continuously makes measurements.
Manual: The operator initiates the test by pressing the [START] button.
One measurement is made each time the trigger is pressed.
R
S
= 100
Ω
Z
X
= 100
Ω
V
PROG
= 1V
V
X
= 0.5V
V
S
= 0.5V
DUT
Source Resistance
Programmed Voltage
DUT
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