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Relative Mode

1. ToreservethecurrentDUTreadings(DCUR)ontheprimarydisplay

asareferencevalue(DREF),pressthe button.

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.

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...

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Reed Instruments R5001 User Manual

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