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Токоизмерительные Клещи
VC903
Инструкция по эксплуатации Страница: 2

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(11) Measure Temperature

1. Connect the black thermocouple probe to the COM Terminal and connect

the red thermocouple probe to the VΩHz Terminal;

2. Turn the rotary switch to the Temperature Mode, and the display will show

the room temperature, to toggle between ℃/℉, press SELECT button;

3. Touch the probes to the desired test points;

4. Read the measured temperature on the display.

*Caution:

a. Do not input voltage at the Temperature Mode.

(12) Auto Power Off

1. The product automatically powers off after 15 minutes of inactivity;

2. The built-in beeper beeps 5 times 1 minute before power off;

3. To restart the product, press SELECT button;

4. To disable the Auto Power Off function, hold down the SELECT button when

turning on the product, you will hear five beeps if you have successfully

disabled the function.

E. Genearl Maintenance

Beyond replacing batteries and fuses, do not attempt to repair or service the

product unless you are qualified to do so and have the relevant calibration,

performance test, and service instructions.

(1) Do not operate the product around hot, wet, flammable, explosive or magnetic

environments.

(2) Clean the product with damp cloth and mild detergent; do not use abrasives or

solvents.

(3) Remove the input signals before you clean the product.

(4) Remove the batteries if you will not use the product for a long time to prevent

possible battery leak.

(5) When “ ” is shown on the display, batteries shall be replaced as below:

1. Loosen the screw and remove the battery cover;

2. Replace the used batteries with new batteries of the same type;

3. Place the battery cover back and fasten the screw.

(6) Replace fuses as above steps. Use only fuses of the same type as the original

ones.

(3) Measure AC/DC Current (A)

1. Turn the rotary switch to the AC/DC Current (A) Mode;

2. Press SELECT to toggle between AC/DC;

3. Push the Jaw Release; center the wire within the clamp jaws (see the picture);

4. Read the measured current on the display.

*Caution:

a. Do not measure current that exceeds the MAX Value as indicated in the

Specifications;

b. Measure one wire at a time because currents moving in different directions will

cancel each other out.

(4) Measure AC/DC Current (μA)

1. Connect the black test lead to the COM Terminal and connect the red test lead

to the VΩHz Terminal (no more than 6000μA);

2. Turn the rotary switch to the AC/DC Current (μA);

3. Press SELECT to toggle between AC/DC;

4. Break the circuit path to be measured. Then connect the test leads across the

break and apply power;

5. Read the measured current on the display.

*Caution:

a. Do not measure current that exceeds the MAX Value as indicated in the

Specifications;

b. Use the 20A Terminal and the Current-A Mode when you are measuring an

unknown current. Then switch to the mA/μA Terminal and the smaller Current

Mode if necessary.

(5) Measure Resistance

1. Connect the black test lead to the COM Terminal and connect the red test lead to

the VΩHz Terminal;

2. Turn the rotary switch to the Resistance Mode, and the display will show “OL”;

3. Touch the probes to the desired test points of the circuit to measure the resistance;

4. Read the measured resistance on the display.

*Caution:

a. Disconnect circuit power and discharge all capacitors before you test resistance.

b. Do not input voltage at the Resistance Mode.

(6) Measure Continuity

1. Connect the black test lead to the COM Terminal and connect the red test lead to

the VΩHz Terminal;

2. Turn the rotary switch to the Resistance Mode, press SELECT once to toggle to the

Continuity Mode;

3. Touch the probes to the desired test points of the circuit;

4. The built-in beeper will beep when the resistance is lower than 50Ω, which

indicates a short circuit.

*Caution:

a. Do not input voltage at the Continuity Mode.

(7) Measure Diode

1. Connect the black test lead to the COM Terminal and connect the red test lead to

the VΩHz Terminal;

2. Turn the rotary switch to the Resistance Mode, press SELECT twice to toggle to the

Diode Mode;

3. Connect the red probe to the anode side and the black probe to the cathode side

of the diode being tested;

4. Read the forward bias voltage value on the display;

5. If the polarity of the test leads is reversed with diode polarity or the diode is

broken, the display reading shows “OL”.

*Caution:

a. Do not input voltage at the Diode Mode.

b. Disconnect circuit power and discharge all capacitors before you test diode.

(8) Measure Capacitance

1. Connect the black test lead to the COM Terminal and connect the red test lead to

the VΩHz Terminal;

2. Turn the rotary switch to the Resistance Mode, press SELECT three times to toggle

to the Capacitance Mode;

3. Connect the red probe to the anode side and the black probe to the cathode

side of the capacitor being tested;

4. Read the measured capacitance value on the display once the reading is stablized.

*Caution:

a. Disconnect circuit power and discharge all capacitors before you test capacitance.

(9) Measure Frequency (low frequency with high voltage) and Duty Cycle

1. Connect the black test lead to the COM Terminal and connect the red test lead to

the VΩHz Terminal;

2. Turn the rotary switch to the AC Voltage Mode, the AC Curent (A) Mode, or the AC

Current (μA) Mode; press the Hz/Duty Cycle button once to toggle to the

Frequency Mode or twice to toggle to the Duty Cycle Mode;

3. Touch the probes to the desired test points of the circuit;

4. Read the measured frequency/duty cycle value on the display.

*Caution:

a. The Hz/Duty Cycle button only applies to measure low frequency with high voltage.

(10) Measure Frequency (high frequency with low voltage)

1. Connect the black test lead to the COM Terminal and connect the red test lead to

the VΩHz Terminal;

2. Turn the rotary switch to the Frequency Mode;

3. Touch the probes to the desired test points of the circuit;

4. Read the measured frequency value on the display.

*Caution:

a. The Frequency Mode only applies to measure high frequency with low voltage.

Warning：

1. Do NOT exceed the “maximum value” indicated in the Specification;

2. Do NOT input voltage at the Current Mode, the Resistance Mode, the Diode

Mode, the Continuity Mode, or the Temperature Mode;

3. Do NOT use the product when the batteries or the battery cover is not placed

properly;

4. Turn off the product and remove the test leads from the test points before

changing batteries or fuses.

F. Troubleshooting

If your product do not function as normal, the following steps may help you. If the

problem still cannot be solved, please contact your dealer.

Problem Possible Reason

Display Malfunction

Low battery; replace batteries

Symbol

Replace batteries

No current input

Replace fuse

LIMITED WARRANTY

AND LIMITATION OF LIABILITY

Customers enjoy one-year warranty from the date of purchase. This warranty

does not cover fuses, disposable batteries, or damage from accident, neglect,

misuse, alternation, contamination, or abnormal conditions of operation or

handling.

Do not input voltage exceeds 36V DC or 25V AC when you are at the

setting of measuring current.

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