Zotek ZT-302 [2/2] Connect the black test lead to the com terminal and connect the red test lead to
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Zotek ZT-302 [2/2] Connect the black test lead to the com terminal and connect the red test lead to

Zotek ZT-301 [2/2] Connect the black test lead to the com terminal and connect the red test lead to
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(9) 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 botton;
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.
(10) 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 botton;
4. To disable the Auto Power Off function, hold down the SELECT botton 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 batterycover;
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.
(2) Measure AC/DC 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 DC Voltage (V) Mode, the DC Voltage (mV) Mode;
3. Push SELECT to toggle between AC/DC;
4. Touch the probes to the correct test points of the circuit to measure the voltage;
5. Read the measured voltage on the display.
*Caution:
a. Do not measure voltage that exceeds the MAX Value as indicated in the
Specifications;
b. Do not touch high voltagecircuit during measurements.
(3) Measure AC/DC Current
1. Connect the black test lead to the COM Terminal and connect the red test lead
to the 10A Terminal or the mA/μA Terminal (choose based on the value of
current) ;
2. Turn the rotary switch to the DC Current (A) Mode, the DC Current (mA) Mode, or
the DC Current (μA) Mode;
3. Push 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 10A Terminal and the Current-A Mode when you are measureing an
unknown current. Then switch to the mA/μA Termianl and the smaller Current
Mode if necessary.
(4) 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.
(5) 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, push 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 inputvoltage at the Continuity Mode.
(6) 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, push 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.
(7) 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, push 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.
(8) Measure Frequency and Duty Cycle
1. Connect the black test lead to the COM Terminal and connect the red test lead to
the VΩHz Terminal;
2. To measure frequency/duty cycle with high voltage, turn the rotary switch to the
DC Voltage (V) Mode; push SELECT once to toggle to the AC Voltage (V) Mode,
then push Hz% once to toggle to the Frequency Mode or push Hz% twice to toggle
to the Duty Cycle Mode. To measure frequency/duty cycle with low voltage, turn
the rotary switch to the Frequency Mode, or push SELECT once 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 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 Mulfunction
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.
All rights reserved. Specifications are subject to change without notice.
Do not input voltage exceeds 36V DC or 25V AC when you are at the
setting of measuring current.

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