Extech Instruments MiniAmp Series User Manual page 12

Resistance and Continuity Measurements
1. Insert the black test lead banana plug into the negative
COM jack and the red test lead banana plug into the
jack.
2. Slide the function switch to the "Ω
3. Press the SELECT key momentarily to select Continuity.
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. For Resistance tests, read the resistance on the display.
6. For Continuity tests, If the resistance is < 10Ω to 120Ω, an
audible tone will sound
Capacitance Measurements
1. Insert the black lead into the negative COM jack and the
red test lead into the positive
2. Slide the function switch to the "
3. Press the SELECT key repeatedly until capacitance units
(F) are displayed in the LCD.
4. The Rel function (models MA400 and MA420) can be used
to zero stray lead and circuit capacitance.
5. Touch the test leads to the capacitor to be tested and read
the measured value.
Note: Battery voltage can affect the accuracy of capacitance
measurements. Ensure that the battery is new when using the
capacitance function. Refer to the specifications.
Frequency Measurements
1. Frequency measurements are available by pressing the HZ
button when one of the following functions is selected;
* Voltage (all models via the test leads)
* ACA (MA400 and MA420 via the clamp)
* µA (MA440 and MA460+ via the test leads)
2. Perform measurements as described for the function
selected.
Notes on frequency sensitivity:
Input sensitivity varies automatically with range selected when
the HZ function is selected. Activating the HZ function while
measuring a signal will select the best sensitivity to avoid
position.
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jack.
" position.
MA Series V2.0 7/02
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