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4
function. 6V function range has the highest and the 1000V range has the lowest. It is
recommended to first measure the signal voltage (or current) level then activate the Hz function in
that voltage (or current) range to automatically set the most appropriate trigger level. You can also
press the Level (RANGE) button momentarily to select another trigger level manually. If the Hz
reading becomes unstable, select lower sensitivity to avoid electrical noise. If the reading shows
zero, select higher sensitivity.
*Number of Bar-graph pointer is used to indicate input range (sensitivity) selected. 1/2/3/4 pointers
indicate that 6/60/600/1000V is selected respectively
Resistance,
Continuity,
Capacitance (Model 319 only), &
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
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