Major tech MT1877IV Instruction Manual - Page 8

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1. Set the function switch to the position.

2. Insert the black test lead plug into the negative (COM) socket and the

red test lead plug into the positive n jack.

3. Press the MODE button until "Ω" appears on the display.

4. 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.

5. Read the resistance on the display. The display will indicate the proper

decimal point, value and symbol.

3.11. CONTINUITY CHECK

WARNING: To avoid electric shock, never measure continuity on

circuits or wires that have voltage on them.

1. Set the range switch to the

2. Insert the black test lead plug into the COM socket and the red test lead

plug into the positive

3. Press the MODE button until "

4. Touch the test probe tips to the circuit or wire you wish to check.

5. If the resistance is less than 50Ω, the audible signal will sound. The

display will also show the actual resistance in ohms.

WARNING: To avoid electric shock, do not test any diode that has

voltage on it.

1. Set the function switch to the

2. Insert the black test lead plug into the COM socket and the red test lead

plug into the

3. Press the MODE button until "

4. Touch the test probe tips to the diode or semiconductor junction you

wish to test. Note the meter reading.

5. Reverse the probe polarity by switching probe position. Note this

reading.

6. The diode or junction can be evaluated as follows:

A. If one reading shows a value and the other reading shows OL, the

diode is good.

B. If both readings show OL, the device is open.

C. If both readings are very small or zero, the device is shorted.

NOTE: The value indicated on the display during the diode check is the

forward voltage.

position.

socket.

" appears on the display.

position.

" appears on the display.