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Resistance

When measuring resistance of devices, it is important to know that there are

two types or ways of measurement. One type is DC resistance measurement.

Another type is AC resistance measurement. The LCR meter provides both

types of measurement.

Before using the meter to measure resistance, please verify whether

theDUT(deviceundertest)requiresDCorACresistancemeasurement

method. Depending on the method, results will vary greatly.

Guard Terminal

Oneoftheinputsocketsandterminalsislabeledas"GUARD".This

terminal does not have to be used in all instances for the meter to provide

measurements.Butinsomeinstances,itisveryuseful.Guardterminal

generally serves two purposes.

If user is using test leads, the guard terminal can be used to connect to

the shielding of the test leads. Doing so can be useful when making large

resistivecomponentmeasurements.Forexample,whenmeasuringa10

MΩresistorwithtestleads,atthehighrangethereadingmayseemtobe

unstableasafewdigitsmaycontinuouslybechanging.Havingtheshield

of the test leads connected to the guard terminal will help stabilize the

reading in some instances.

Guardterminalisalsousedtominimizenoiseandtohelpminimizeparasitic

effects coming from the component being measured, thus allowing high

precision results.

Calibration Mode

It is recommended to regularly calibrate this meter to improve the accuracy

ofhigh/lowimpedancemeasurements.

Note: You will need a shorting bar or a short piece of conductive metal

(i.e.paperclip)tocompletethecalibrationprocedure.

1. Be sure nothing is connected to the meter, and turn it on.

2. Press and hold down the CAL button for 2 seconds to enter

calibration mode.

3. Thescreenwilldisplay"OPEN",indicatingtheinputterminalshave

nothing connected.

continued...

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Reed Instruments R5001 User Manual

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