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Figure 4.3.4 OS setup interface
Instruction:
Percentage of open judge value and standard value
OFF~100% ~ 500%
STEP: 10%
Percentage of short judge value and standard value
Sampling standard value (see NOTE)
Acquisition of the distribution parameter as standard
Note:
1. When the cursor is in the position as the table below, (F1) position displays (GET).
2. Press (F1) function key, the instrument enters standard value sampling status. The instrument
outputs 100V voltage in sampling, and the current flowing through the DUT can be obtained
within 2 seconds.(please be attention in voltage output)
3. The capacitance value here is not the real capacitance value, but the value of the sampled
current being transferred via impedance. The value should be close to that of capacitor
installed in the test terminal. (The sampling current is not only generated by capacitor)
Setup of OPEN SHORT value:
The OPEN value is larger than the value when there is no connection with the DUT and smaller
than the minimum value when there is connection with the DUT.
The SHORT value is larger than the maximum value when there is connection with the DUT and
smaller than the value when having other short problems.
Example: take 3-coil inductance for example: the capacitance between 1-2 is 300P, the capacitance
between 1-3 is 200P and 2-3 may short-circuit.
1. No connection with the DUT (GET): STAN=100P, confirmation of the OPEN value.
2. Repeated connection with the DUT, the data range of GET: STAN=350P~450P, confirmation of
the standard value.
3. Short circuit in 2-3, the data range of GET: STAN=550P~650P, confirmation of the SHORT
value.
Calculation of the parameter setting:
1. Supposing STAN=400P
2. OPEN value: lower limit=100P/400P=25%, upper limit=350P/400P=88%. 60% is
recommended to take.
3. SHORT value: lower limit=450P/400P=112%, upper limit=550P/400P=138%. 125% is
recommended to take.
4.3.5 MF (multi-channel follow)
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