15B MAX/17B MAX
Users Manual
8
Input Alert
TM
Feature
WCaution
To prevent circuit damage and a possible blown
current fuse, do not place the probes across (in
parallel with) a powered circuit when a lead is
plugged into a current terminal. This causes a
short circuit because the resistance through the
Product current terminals is very low.
If a test lead is plugged into the mA/
μA or A terminal, but
the rotary switch is not set to the correct current position,
the beeper chirps, the warning alert LED
X (17B MAX only),
HOLD and Bbuttons rapidly flash. See Figure 5. This is to
stop you from attempting to measure voltage, continuity,
resistance, capacitance, or diode values when the leads are
plugged into a current terminal.
Note
To prevent false input alert warnings, keep the
mA/
μA and A terminals free of metallic debris.
Figure 5. Input Alert Indicators
Measure Resistance
To measure resistance:
1. Turn the rotary switch to Q and disconnect power from
the circuit under test.
2. Connect the red test lead to the W terminal and the
black test lead to the COM terminal, as shown in
Figure 6.
3. Touch the probes to the desired test points of the circuit
to measure the resistance.
4. See the display for the measured resistance.
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