Tenma 72-8495 - Resistance Measurement; Continuity and Diode Tests; Meter Functions

5
Resistance Measurement
• Set the function switch to the Ω position.
• Insert the black test lead into the negative COM terminal and the red test lead into
the positive Ω terminal.
• 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.
• Read the resistance in the display.
CAUTION: 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 mains leads.
Diode Test
• Set the function switch to the position.
• Insert the black test lead into the negative COM terminal and the red test lead into
the positive Ω terminal.
• Press the MODE button to indicate on the display.
• Touch the test probe tips across the circuit or part under test.
• Read the resistance in the display.
• Forward voltage will typically indicate 0.400 to 0.700V.
• Reverse voltage will display “OL”. Shorted devices will indicate near 0V and an
open device will indicate “OL” in both polarities.
Max Hold Button
• To hold the highest reading on the LCD:
• Press the MAX hold button. The meter reading display the peak reading.
• Press the MAX hold button again to return to normal operation.
• Continuity Check
• Set the function switch to the position.
• Insert the black test lead into the negative COM terminal and the red test lead into
the positive Ω terminal.
• Press the MODE button to indicate on the display.
• Touch the test probe tips to the circuit or wire you wish to check.
• If the resistance is less than approximately 150Ω, the audible signal will sound. If
the circuit is open, the display will indicate “OL”.
• Read the resistance in the display.
CAUTION: To avoid electric shock, never measure continuity on circuits or wires that
have voltage on them.
• Auto Power Off
The auto off feature will turn the meter off after 15 minutes.
Hold Button
• The Data Hold function allows the meter to “freeze” a measurement for later
reference.
• Press the “DATA HOLD” button to “freeze” the display, the “HOLD” indicator will
appear.
• Press the “DATA HOLD” button again to return to normal operation.