5
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
o
C &
o
F functions (Model
319s
only)
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.
µ
A (Model
319s
only), mA (Model
319s
only) and A Current functions
Press SELECT button momentarily to toggle between DC and AC. Last selection will be saved as
power up default for repeat measurement convenience.
*Note: When measuring a 3-phase system, special attention should be taken to the phase-to-
phase voltage which is significantly higher than the phase-to-earth voltage. To avoid exceeding the
voltage rating of the protection fuse(s) accidentally, always consider the phase-to-phase voltage as
the working voltage for the protection fuse(s).
