ZOYI ZT-C4 Digital Multimeter User Manual

: June 24, 2024
: ZOYI

Table of Contents

Introduction
Safety Information
Specifications
Instruction
General Maintenance
Troubleshooting
LIMITED WARRANTY AND LIMITATION OF LIABILITY
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ZOYI ZT-C4 Digital Multimeter

ZOYI ZT-C4 Digital Multimeter

Introduction

This product is a battery -powered, true -rms, auto -ranging digital multimeter with
a 4000 counts, LCD display and backlight/flashlight

Safety Information

To avoid possible electrical shock, fire, or personal injury, please read all safety information before you use the product.

Do NOT exceed the “maximum value ” indicated in the Specification.
Examine the connection of the test leads and the insulation of the product before measuring voltage higher than 36 V DC or 25 V AC.
Disconnect the test leads from the circuit before changing the mode.
Misuse of mode or range can lead to hazards, be cautious “OL” will be shown on the display when the input is out of range.
Safety symbols:

| Hazardous Voltage| | Earth
---|---|---|---
| Double Insulated| | Low Battery
| Risk of Danger. Check the User Manual.

Specifications

Electrical Specifications

Function| Range| Resolution| Accuracy| MAX.Value| Other
DC Voltage (V)| 4.000V| 0.001V| ±(0.5%+3)| 600V|
40.00V| 0.01V
400.0V| 0.1V
600V| 1V
DC Voltage (mV)| 40.00mV| 0.01mV| 400mV
400.0mV| 0.1mV
AC Voltage (V)| 4.000V| 0.001V| ±(1.0%+3)| 600V| Frequency Response: 40Hz-1kHz
40.00V| 0.01V
400.0V| 0.1V
600V| 1V
AC Voltage (mV)| 40.00mV| 0.01mV| 400mV
400.0mV| 0.1mV
DC Current (A)| 4.000A| 0.001A| ±(1.2%+3)| 10A| MAX.Current：10A（no more than 15 seconds） No Voltage input at this mode
Frequency Response(AC): 40Hz-1kHz
10.00A| 0.01A
DC Current (mA)| 40.00mA| 0.01mA| 400mA
400.0mA| 0.1mA
AC Current (A)| 4.000A| 0.001A| ±(1.5%+3)| 10A
10.00A| 0.01A
AC Current (mA)| 40.00mA| 0.01mA| 400mA
400.0mA| 0.1mA
Function| Range| Resolution| Accuracy| MAX.Value| Other
---|---|---|---|---|---
Resistance| 400.0Ω| 0.1Ω| ±(0.5%+3)| 40MΩ| No Voltage input at this mode
4.000kΩ| 0.001kΩ
40.00kΩ| 0.01kΩ
400.0kΩ| 0.1kΩ
4.000MΩ| 0.001MΩ
40.00MΩ| 0.01MΩ| ±(1.5%+3)
Frequency| 4.000Hz| 0.001Hz| ±(1%+2)| 10.00MHz|
40.00Hz| 0.01Hz
400.0Hz| 0.1Hz
4.000kHz| 0.001kHz
40.00kHz| 0.01kHz
400.0kHz| 0.1kHz
10.00MHz| 0.01MHz
Capacitance| 4.000nF| 0.001nF| ±(5.0%+20)| 4mF|
40.00nF| 0.01nF| ±(3.5%+4)|
400.0nF| 0.1nF|
4.000uF| 0.001uF|
40.OOnF| 0.01uF|
400.0uF| 0.1uF|
4mF| 0.001mF| ±(5.0%+5)|
Temperature| -30℃-1000℃（-22℉-1832℉）| No Voltage input at this mode
NCV| √
Diode| √(DC forward current is 5mA，voltage is 3V）
Continuity| √(no more than 50Ω)

General Specifications

Mechanical Specifications

Dimension| 1206033mm
Weight| 137.5g
Battery Type| 1.5V AAA Battery * 2
Warranty| One year

Environmental Specifications

Instruction

Front Panel （see the picture on the right
LCD display
buttons
2a. HOLD : To hold the current reading, press this button and you will see “HOLD” on the display;
press again to cancel . To turn on the backlight and flashlight, press this button for more than 2 seconds ; long -press again to turn off.
2b. SELECT : To toggle between AC/DC, Resistance/Capacitance/Diode /Continuity when you press this button.
Rotary Switch : To change mode or range 。
(from OFF, clockwise)
3a. OFF
3b. AC/DC Voltage (V)/Frequency (Voltage -V)
3c . AC/DC Voltage (mV)/Frequency(Voltage -mV)
3d . Continuity/Diode/Resistance/Capacitance
3e . Temperature
3f . NCV
3g . AC/DC Current (A) (Cureent -A)
3h . AC/DC Current (mA) (Current -mA)
Input terminal for voltage, resistance, capacitance, frequency, temperature, current (mA), continuity, diode, and duty cycle measurements.
COM: Common terminal for all measurements.
10A : Input terminal for current (V) measurements.
Measure AC/DC Voltage
Connect the black test lead to the COM Terminal and connect the red test lead to the Terminal ;
Turn the rotary switch to the Voltage

  * V Mode or the Voltage
  * mV Mode ;
3. Press 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 voltage circuit during measurements .
Do not input voltage exceeds 36V DC or 25V AC when you are at the setting of measuring current.

Measure AC/DC Current
Connect the black test lead to the COM Terminal and connect the red test lead to the Terminalor the 10A Terminal (choose based on the value of current);
Turn the rotary switch to the Current-A Mode or the Current-mA Mode;
Press SELECT to toggle between AC/DC;
Break the circuit path to be measured. Then connect the test leads across the break and apply power;
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 measuring an unknown current. Then switch to the Terminal and the Current-mA Mode if necessary.

Measure Resistance
Connect the black test lead to the COM Terminal and connect the red test lead to the Terminal;
Turn the rotary switch to the Resistance Mode, and the display will show “OL”;
Touch the probes to the desired test points of the circuit to measure the resistance;
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.

Measure Continuity
Connect the black test lead to the COM Terminal and connect the red test lead to the Terminal;
Turn the rotary switch to the Resistance Mode, press SELECT once to toggle to the Continuity/Diode Mode;
Touch the probes to the desired test points of the circuit;
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.

Measure Diode
Connect the black test lead to the COM Terminal and connect the red test lead to the VΩHz Terminal;
Turn the rotary switch to the Resistance Mode, press SELECT once to toggle to the Continuity/Diode Mode;
Connect the red probe to the anode side and the black probe to the cathode side of the diode being tested;
Read the forward bias voltage value on the display;
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.

Measure Frequency
Connect the black test lead to the COM Terminal and connect the red test lead to the VΩHz Terminal;
Turn the rotary switch to the Frequency Mode;
Touch the probes to the desired test points of the circuit;
Read the measured frequency/duty cycle value on the display.

  *  **Caution:**

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

Measure Temperature
Connect the black thermocouple probe to the COM Terminal and connect the red thermocouple probe to the Terminal;
Turn the rotary switch to the Temperature Mode, and the display will show the room temperature, to toggle between ℃/℉, press SELECT button;
Touch the probes to the desired test points;
Read the measured temperature on the display.

  *  **Caution:**

a. Do not input voltage at the Temperature Mode.

Test NCV
Turn the rotary switch to the NCV Mode;
Hold the product and move it around, the built-in beeper will beep when the inner sensor detects AC voltage nearby. The stronger the voltage is, the quicker the beeper beeps.
NCV Secondary function Put the red probe into the VΩHz terminal, then use the black probe to touh the live line and Null line of the Main supply. You can judge the L-line or N-line by the beeps, If you can hear the strong beeps, this is the L-line, or it’s a N-line.
Auto Power Off
The product automatically powers off after 15 minutes of inactivity;
The built-in beeper beeps 5 times 1 minute before power off;
To restart the product, press SELECT button;
To disable the Auto Power Off function, hold down the SELECT button when turning on the product, you will hear three beeps if you have successfully disabled the function.

General 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.

Do not operate the product around hot, wet, flammable, explosive or magnetic environments.
Clean the product with damp cloth and mild detergent; do not use abrasives or solvents.
Remove the input signals before you clean the product.
Remove the batteries if you will not use the product for a long time to prevent possible battery leak.
When “ ” is shown on the display, batteries shall be replaced as below:
Loosen the screw and remove the battery cover;
Replace the used batteries with new batteries of the same type;
Place the battery cover back and fasten the screw.
Replace fuses as above steps. Use only fuses of the same type as the original ones.

Warning：

Do NOT exceed the “maximum value” indicated in the Specification;
Do NOT input voltage at the Current Mode, the Resistance Mode, the Diode Mode, the Continuity Mode, or the Temperature Mode;
Do NOT use the product when the batteries or the battery cover is not placed properly;
Turn off the product and remove the test leads from the test points before changing batteries or fuses.

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.