Hioki 3522-50, Инструкция по эксплуатации

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4.6 Setting the Ranging
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NOTE
2. When the setting has been established as above, press the key to return
to the Initial screen.
In the case of a test sample whose impedance changes according to the
frequency, when testing is being performed with HOLD set, it may happen,
when the frequency is changed over, that measurement cannot be continued
to be performed upon the same test range. You should change the test
range if this happens.
The test range setting is made according to the combination of the
impedances of the sample being tested and the test cables. Therefore it can
happen that testing is not possible, if the test range is held with HOLD only
upon the basis of the impedance of the sample under test. If this happens,
you should change the test range, making reference to Section 4.9, "Open
Circuit Compensation and Short Circuit Compensation".
Even if the 3522-50 unit is being used outside the limits of its specification,
test values are sometimes displayed.
In this case, the following type of indication "reference value" appears on the
display, indicating a value which is not guaranteed.
In this case, you should consider the following possible cause, and you
should either change the test conditions while checking the accuracy assured
ranges (with reference to Section 7.5, "Test Accuracy"), or you should
consider the measured values as values for reference only, because their
validity is somewhat doubtful.
When the present test range (when HOLD is set) is not suitable:
Either you should set AUTO ranging so as to select the most suitable test
range automatically, or you should set a more suitable test range manually.