Bedienungsanleitung Elma 25 (Seite 48 von 56) (Dänisch, Schwedisch, Norwegisch, Finnisch)

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Elma 22 - 25 - 27 Page 47

Diode test is the default function. The reading shows the approximate voltage drop across

the test leads. Normal forward voltage drop (forward biased) for a good silicon diode is

between 0.400V to 0.900V. A reading higher than that indicates a leaky diode (defective).

A zero reading indicates a shorted diode (defective), and the meter will give a long beep

as continuity warning. An OL indicates an open diode (defective). Reverse the test leads

connections (reverse biased) across the diode. The digital display shows OL if the diode is

good. Any other readings indicate the diode is resistive or shorted (defective).

Press

SELECT

button momentarily selects the lowest 600Ω range for lower resistance

measurements. It is an extended range to complement the AutoCheck

Resistance (Ω)

function.

-DC-

A & AC-

A Micro-Amp functions (BM27 only)

Rotate the rotary selector to the μA position. The display-reading unit is in μA although

there is no unit annunciator on the display. DC-μA is the default function. There is no

annunciator for DC. Press

SELECT

button momentarily to select AC-μA. The AC

annunciator “ ” turns on. These ranges, like other functions, are protected up to the

maximum rated voltages of the meter.

-DCV & ACV functions (BM22 only)

Rotate the rotary selector to the V position selects common impedance (Hi-Z) voltage

measurements. DCV is the default function. The DC annunciator “ ” turns on. Press

SELECT

button momentarily to select ACV. The AC annunciator “ ” turns on.

-Resistance, Continuity, Diode & Capacitance functions (BM22

only)

Rotate the rotary selector to the Ω/ / / position. Resistance “Ω”is the default

function.

Press

SELECT

button momentarily selects Continuity function. The Audible annunciator

“ ” turns on. Continuity is convenient for checking wiring connections and operation of

switches. A continuous beep tone indicates a complete circuit.

Press

SELECT

button momentarily AGAIN selects Diode test function. The annunciator

“

” turns on. The reading shows the approximate voltage drop across the test leads.

Normal forward voltage drop (forward biased) for a good silicon diode is between 0.400V

to 0.900V. A reading higher than that indicates a leaky diode (defective). A zero reading

indicates a shorted diode (defective). An OL indicates an open diode (defective). Reverse

the test leads connections (reverse biased) across the diode. The digital display shows OL

if the diode is good. Any other readings indicate the diode is resistive or shorted

(defective).

Press

SELECT

button momentarily AGAIN selects Capacitance function.

-Frequency function (BM22 only)

Rotate the rotary selector to the Hz position selects Frequency function.

*Unlike the Line Level Hz Frequency function (for BM27 only) as stated, this (Common) Hz

Frequency function is set only at the highest input sensitivity mainly for measuring small

electronic signals of below 20VAC rms.

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