Figure 7. Measuring Percent “ON” Time
a. Test first for the presence of an AC or DC voltage. (Refer to
Warning
).
If no voltage is present, proceed with the set up below.
b. Set the range selector to “Rx1” for resistance less than 100Ω, “Rx100” for resistance
less than 10,000, or “Rx1K” for higher values. Observe correct polarity when checking
DC circuit components.
c. Connect leads to “COM(-)” and “+” (V%) jacks as shown in Fig. 6
d. Short the lead clips.
e. Adjust the “ADJ.OHMS” knob for full scale (0 ohms). Separate leads and connect to
resistance to be measured.
f. Read resistance on the black “OHMS” scale, above the mirror, multiplying the reading
by the factor indicated by the switch setting.
a. Set range selector to “FAST” position, and function switch to “DC”.
b. Connect black lead to the (COM) jack and the red lead to the “+” (Ω V%) jack.
See Figure 7.
c. Press the “Push to Set” button and adjust pointer to 100% on the green scale using the
“ADJ OHMS” knob.
d. Release button.
e. Set range switch to “FAST” or “SLOW” position (see suggestions below) and connect
leads to coded circuit. Observe correct polarity.
f. Read percent “ON” time on the green (0-100%) scale. The following suggestions will be
helpful:
PERCENT “ON” TIME MEASUREMENTS
17