Resistance Measurements; Continuity Check - Craftsman 82170 Owner's Manual

4. Remove power from the circuit under test, then open up the circuit at
the point where you wish to measure current.
5. Touch the black test probe tip to the negative side of the circuit.
Touch the red test probe tip to the positive side of the circuit.
6. Apply power to the circuit.
7. Read the current in the display. For mA AC measurements, reset the
function switch to successively lower mA AC positions to obtain a
higher resolution reading. The display will indicate the proper decimal
point and value.

RESISTANCE MEASUREMENTS

WARNING: To avoid electric shock, disconnect power to the unit under
test and discharge all capacitors before taking any resistance
measurements. Remove the batteries and unplug the line cords.
1. Set the function switch to the highest Ω position.
2. Insert the black test lead banana plug into the negative (COM) jack
Insert the red test lead banana plug into the positive Ω jack.
3. Touch the test probe tips across the circuit or part under test. It is best
to disconnect one side of the part under test so the rest of the circuit
will not interfere with the resistance reading.
4. Read the resistance in the display and then set the function switch to
the lowest Ω position that is greater than the actual or any anticipated
resistance. The display will indicate the proper decimal point and value.

CONTINUITY CHECK

WARNING: To avoid electric shock, never measure continuity on
circuits or wires that have voltage on them.
1. Set the function switch to the
2. Insert the black lead banana plug into the negative (COM) jack
Insert the red test lead banana plug into the positive (Ω) jack.
3. Touch the test probe tips to the circuit or wire you wish to check.
4. If the resistance is less than approximately 40Ω, the audible signal will
sound. If the circuit is open, the display will indicate "1".
position.
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