Extech Instruments MN26, Руководство пользователя

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MN26T V4.0 05/05 6
Capacitance Measurements
1. Insert the black test lead banana plug into the negative COM jack and the red test
lead banana plug into the positive CAP jack.
2. Turn the rotary switch to the CAP position.
3. Touch the test probes to the circuit or device under test and read the capacitance on
the display.
Frequency or Duty Cycle Measurements
1. Insert the black test lead banana plug into the negative COM jack and the red test
lead banana plug into the positive HZ jack.
2. Turn the rotary switch to the Hz/% position.
3. Press the Hz/% key to select “ Hz ” or “ % ”.
4. Touch the test probes to the circuit or under test and read the frequency or duty cycle
on the display.
Temperature Measurements
WARNING: To avoid electric shock, disconnect test leads from any source of voltage
before making a temperature measurement. Be sure that the thermocouple has been
removed before changing to any other measurement function.
WARNING: To avoid electric shock, do not probe live circuits with the thermocouple
probe..
1. Insert the type K thermocouple probe into the sub-miniature temperature socket.
(see separate instruction sheet at the end of this manual)
2. Turn the rotary switch to the
o
C or
o
F position.
3. Read the temperature on the display.
Note: Although the meter specifies the temperature range to be -4 to 1400
o
F (-20 to 760
o
C)
the supplied thermocouple’s (Part No. TP870) temperature range is -40 to 482
o
F (-4- to
250
o
C).
Continuity Measurements
1. Insert the black test lead banana plug into the negative COM jack and the red test
lead banana plug into the positive
Ω
jack. Observe polarity.
2. Turn the rotary switch to the •))) position.
3. Press the •))) key to select continuity.
4. Touch the test probes to the circuit or device under test. If the resistance is less than
approximately 30
Ω
the buzzer will sound and the resistance appears on the display.
Diode Measurements
1. Insert the black test lead banana plug into the negative COM jack and the red test
lead banana plug into the positive diode jack.
2. Turn the rotary switch to the •))) position.
3. Press the •))) key to select diode.
4. Touch the test probes to the diode under test. Forward voltage will indicate 0.4V to
0.7V. Reverse voltage will indicate “ OL ”. Shorted devices will indicate near 0mV and
an open device will indicate “ OL ” in both polarities.