Bk-precision 875B - Manual Manual do Utilizador descarregar pdf (Página 5)

TWO: OPERATION AND MEASUREMENT

2.1

Warning

Electricity can cause severe injur ies or even d eath, sometimes

even with relatively low voltages or currents.

Therefore it is vitally important that any electronic instruments such

as these meters be totally understood before use.

Please do not use this instrume nt, or any other piece of electrical

or electr onic test e quipment, w ithout f irst th oroughly familiarizin g

yourself with its correct operation and use.

2.2

Cautions

(1) To obtain accurate impedance values, perform zero

adjustment before measurements.

(2) Attempted measurement o f ch arged capacitors w ill o verload

the instrument.

(3) If a dead or partially discharged battery is left in the instrument

for an ext ended period, damage t o the unit could result from

battery lea kage. Therefore it is important t o rep lace a

discharged battery prompt ly. Ple ase dispo se o f the u sed

battery in a proper manner. Additionally, if t he instrument will

not be u sed for an extend ed p eriod, a lways remove the

battery from the unit and store it separately.

(4) Do not use so lvents or aromatic hy drocarbons to cle an the

instrument, or the plastic case may be damaged. If cleaning is

necessary, use only a mild solution of warm water and soap.

(5) Capacitors are manufactured to operate under certain

conditions. Since the meter

may

test a capacitor under

different conditions than of the manufacturer, the values

might not be identical. This is not

due to meter error, just

the method of test. Therefore, if this is the case, check

the capacitor’s dissipation factor (≦0.1) and whether the

test was conducted in series or parallel mode (ref.

Section 3.6). Use the equations to convert between the

modes. At this point, one should obtain a value to that

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Bk-precision 875B - Manual Manual do Utilizador Página 5