Ryobi RP4020 User Manual download pdf (Page 12)

12 – English

CONTINUITY TEST

See Figure 10, page 15.

NOTE: Before continuity test, disconnect all power to the

circuit to be tested, and discharge all capacitors fully.

 Connect the black test lead to the COM jack and the red

test lead to the μA/mA jack.

NOTE: The polarity of the red lead is positive ( + ).

 Set the mode selection dial to position.

 Connect the test leads across the circuit to be tested.

 If the circuit resistance is less than about 20 Ω, the built-

in buzzer will sound.

DIODE TEST

See Figure 11, page 15.

NOTE: Before diode test, disconnect all power to the circuit

to be tested, and discharge all capacitors fully.

 Connect the black test lead to the COM jack and the red

test lead to the μA/mA jack.

NOTE: The polarity of the red lead is positive ( + ).

 Set the mode selection dial to position.

 Connect the red test lead to the anode of the diode to

be tested, and the black test lead to the cathode of the

diode .

 Read the approximate forward voltage drop of the diode

on the display.

 If the connection is reversed, OL will be shown on the

display.

OPERATION

MEASURING CAPACITANCE

See Figure 12, page 15.

NOTE: Before measurement, make sure that the capacitor

to be measured has been discharged fully.

 Connect the black test lead to the COM jack and the red

test lead to the μA/mA jack.

 Set the mode selection dial to position.

 If the display shows a reading other than zero, press the

REL▵ button.

NOTE: In low capacitance range, if the reading is not

stable, wait a while to let the reading stabilize, and then

press the REL▵ button.

 Connect the test leads across the capacitor to be mea-

sured.

 Wait until the reading is stable, then take the reading. For

high capacitance measurements, it may take about 30

seconds for reading to be stable.

AUTOMATIC POWER OFF

 The display will go blank and the meter will go into Sleep

mode if you do not turn the mode selection dial or press

any button for about 15 minutes. Pressing any button

arouses the meter from Sleep.

To disable the automatic power-off feature, press and hold

down any button while rotating the mode selection dial from

OFF position.

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Ryobi RP4020 User Manual Page 12

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