Full Product Manual

16
Relative Mode
1. To reserve the current DUT readings (DCUR) on the primary display
as a reference value (DREF), press the button.
2. The ∆ symbol will then appear on the LCD screen indicating this function
is now active. The secondary display will show the percentage of the
relative value (REL%).
3. Press the button again to show the reference value (DREF) on the
primary display; the ∆ symbol will start to blink.
REL% = (DCUR – DREF) / DREF x 100%
Note: The percentage range is -99.9% to 99.9%. When the relative value
is larger than double the reference value (DREF), the "OL%" symbol will
appear on the secondary display.
4. Press and hold down the button for approximately 3 seconds to
exit relative mode and resume normal operation.
Accuracy Discrepancies
In some special cases, inaccuracies may occur in the measurement of
capacitive, inductive, and resistive components. This section provides
some recommendations and suggestions to consider.
Capacitance
It is strongly recommended to have the dissipation factor low when measuring
capacitors. Electrolytic capacitors inherently have a higher dissipation factor
due to their normally high internal leakage characteristics. In some cases, if
D (dissipation factor) is excessive, measurement accuracy may degrade and
even read out of specication.
Inductance
Some inductors are intended to operate at a certain DC bias to achieve a
certain inductance value, however this meter cannot produce such a biasing
scheme. External biasing should not be attempted because external power
would be applied to the instrument and cause serious damage to the meter.
Therefore, in some cases, the inductance reading may not agree with
manufacturer's specication. It is important to check if the specication
pertains to DC biasing or not.
continued...
REED Instruments
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