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(4) Connect the alligator clips to the capacitor leads.
(5) Read the display. The value is direct reading in the electrical unit (nF, uF) indicated at the selected range
switch. If DISPLAY show "1", It indicate on Out-of-Range measurement. If the display indicates one or more
leading zeros, shift to the next lower range scale to improve the resolution of the measurement.
NOTE:
(a) If the capacitance value is unmarked, start from the 2nF range and keep increasing until the over-range
indication goes off and a reading is obtained.
(b) A shorted capacitor will read over-range on all ranges. A capacitance with low voltage leakage will read over
range, or a much higher value than normal.
An open capacitor will read zero on all ranges (possible a few pF on 2nF range, due to stray capacitance of the
instrument).
(c) Very low capacitance measurement should be performed by using extremely short leads in order to avoid
introducing any stray inductance.
(d) When using the optioned test leads, remember that the leads introduce a measurable capacitance to the
measurement. As a first approximation, the test capacitance did measured by opening the leads at the trips,
recording the open circuit value and subtracting the value.
(e) Capacitors, especially electrolytic, often have notoriously wide tolerances. Do not be surprised if the
measured value is greater than the value marked on the capacitor, unless it is a close tolerance type. However,
value is seldom drastically below the rated value.
5-5. RESISTANCE( ) MEASURING PROCEDURE
(1) Set POWER switch to "ON" position.
(2) Select the range switch for the maximum expected resisitance.
(3) Insert the black test leads into the "COM" jack, and the red one into the "V/ /Hz" jack;
(4) Turn the range switch to resistance position, then connect the test leads at the two ends of the resistor.
(5) If DISPLAY show "1", It indicate on Out-of-Range measurement. If the display indicates one or more leading
zeros, shift to the next lower range scale to improve the resolution of the measurement.
Note:
1. When input is open circuit, it will display status 1;
2. When measuring resistance on line, ensure that all power of circuit tested are turn down and all capacitor are
discharged completely;
3. Never input voltage if in resistance measurement mode!
4. It normal for resistance higher than 1M that the reading data is not stable for the first several seconds;
5-6. Transistor hFE
1.Set POWER switch to "ON" position
2. Turn the range switch to "hFE" position;
3. To determine the transistor's type, NPN or PNP, insert the emitting, base and collector electrode into the
corresponding jacks in testing accessory.
5-7. DIODE AND CONTINUITY TEST
1.Set POWER switch to "ON" position.
2. Insert the black test leads into "COM" jack, and the red one into the "
3. connect test leads in parallel to the diode tested, with the red test leads to the anode and the black to cathode,
then the reading value will be approximate forward voltage drop of the diode;
4. Connect pencils to two points of the circuit to be tested, if buzzer sounds, then the resistance between the two
points is lower than (60±20) .
5-8 DATA HOLD
Press HOLD, the peak value of current data will be keep displaying on LCD; press it again to cancel this
©Copyright Abacanto Digital SA.
Manual de usuario AD6243
AD Instruments
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