Elma BM 251s-257s
side 27
Resistance, Continuity,
Capacitance,
Diode test functions
Press the SELECT button momentarily to select the subject functions in sequence. Last selection will be
saved as power up default for repeat measurement convenience.
CAUTION
Discharge capacitors before making any measurement. Large value capacitors should be discharged
through an appropriate resistance load.
CAUTION
Using resistance and continuity function in a live circuit will produce false results and may damage the
instrument. In many cases the suspected component must be disconnected from the circuit to obtain an
accurate reading
Continuity function is convenient for checking wiring connections and operation of switches. A
continuous beep tone indicates a complete wire.
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).
DCmV, ACmV, Temperature oC & oF functions
Press the SELECT button momentarily to select the subject functions in sequence. Last selection will be
saved as power up default for repeat measurement convenience.
Note:
Be sure to insert the banana plug K-type temperature bead probe Bkp60 with correct
polarities. You can also use a plug adapter Bkb32 (Optional purchase) with banana pins to K-type socket
to adapt other standard K type mini plug temperature probes.
Summary of Contents for 5706445410286
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