Operation - Aim TTi LCR400 Manuel D'instructions

This section covers general use of the instrument. Although the basic capabilities are largely
obvious from the keypad functions, users requiring full performance and accuracy are advised to
read this and the Measurement Principles sections in full.
Switching On
Switch on the instrument using the ON/OFF switch on the rear panel.
At switch on the instrument runs a short internal self test procedure, displays the software
version, and then waits in Auto mode for a component to measure. If it is switched on with a
component connected it will automatically detect and measure that component.
To fully disconnect from the AC supply unplug the mains cord from the back of the instrument or
switch off at the AC supply outlet; make sure that the means of disconnection is readily
accessible. Disconnect from the AC supply when not in use.
Display
In normal use the left–hand 5–digit display shows the value of the major parameter (L, C or R)
and the right–hand display shows the value of the minor parameter (Q, D or R). The parameters
being displayed are indicated above their respective numeric values and the units of the
parameter are shown to the right of the value itself. A display test which lights all the indicators
can be carried out by holding down any key while the instrument is switched on.
Basic measurement accuracy is 0.1% and, for the impedance range for which this accuracy is
guaranteed (see Specification) the instrument will autorange to give typically between 5,000 and
50,000 counts of display resolution. If the measured value is outside the range within which
0.1% accuracy is guaranteed (at the measurement frequency selected) the units indicator (kΩ,
pF, etc.) will flash to show this. If the frequency indicator is also flashing, changing the frequency
range may bring the component being measured within the range of the instruments 0.1%
accuracy specification. For example, measuring 680pF at the default Auto frequency of 1kHz will
cause both the units indicator (pF) and frequency range lamp to flash; changing the frequency to
10kHz brings 680pF within the instrument's 0.1% specification and both lamps will stop flashing.
During the set–up and use of the sort facility the displays have other uses; these are fully
explained in the Component Sorting section.

Operation

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