ZOYI ZT-QS4 Digital Clamp Multimeter User Manual

: June 1, 2024
: ZOYI

Table of Contents

ZOYI ZT-QS4 Digital Clamp Multimeter
User Manual
Safety Information
Specifications
Instruction
General Maintenance
Troubleshooting
LIMITED WARRANTY AND LIMITATION OF LIABILITY
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ZOYI ZT-QS4 Digital Clamp Multimeter

ZOYI-ZT-QS4-Digital-Clamp-Multimeter-product

User Manual

Introduction

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

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 36V DC or 25V 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:

$ZOYI-ZT-QS4-Digital-Clamp-Multimeter- $2$$

Specifications

Electrical Specifications

Function| Range| Resolution| Accuracy| MAX.Value| Frequency Response
DC Voltage (V)| 4.000V| 0.001V| ±(0.5%+3)| 600V|
40.00V| 0.01V
400.0V| 0.1V
600V| 1V
AC Voltage (V)| 4.000V| 0.001V| ±(1.0%+3)| 600V| 40Hz-1kHz
40.00V| 0.01V
400.0V| 0.1V
600V| 1V
AC Current (A)| 4.000A| 0.001A| ±(5%+5)| 600A| 40Hz-1kHz
40.00A| 0.01A| ±(2.5%+8)
400.0A| 0.1A
600A| 1A
Function| Range| Resolution| Accuracy| MAX.Value| Frequency Response|
---|---|---|---|---|---|---

Resistance

| 400.0Ω| 0.1Ω|

± (0.5%+3)

|

40MΩ

| |
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|

± (0.1%+2)

|

1.000MHz

| |
40.00Hz| 0.01Hz|
400.0Hz| 0.1Hz|
4.000kHz| 0.001kHz|
40.00kHz| 0.01kHz|
400.0kHz| 0.1kHz|
1.000MHz| 0.001MHz|

Capacitance

| 4.000nF| 0.001nF| ±(5.0%+20)|

4.000mF

| |
40.00nF| 0.01nF|

±(2.0%+5)

|
400.0nF| 0.1nF|
4.000μF| 0.001μF|
40.00μF| 0.01μF|
400.0μF| 0.1μF|
4.000m F| 0.001m F| ±(5.0%+5)|
Diode| √|
Continuity| √|
Inrush current| √|
Flashlight| √|

Temperature

| (-30~1000)℃| 1℃|

± (2.5%+5）

| 1000℃| |
1832℉|
(-22~1832)℉| 1℉|
General Specifications

Display（LCD）| 4000 counts
Ranging| Auto
Material| ABS
Update Rate| 3 times/second
Ture RMS| √
Data Hold| √
Low Battery Alert| √
Auto Power Off| √
Mechanical Specifications

Instruction

Front Panel（see the picture on the right）
Jaw
Flashlight
Jaw release
Hold / Inrush Current / Peak Hold
HOLD: To press this button once and you will see
“HOLD” on the display; Inrush current: To press this button twice and you will see “INRUSH” on the display; Peak hold: To press this button twice after connecting test leads to the Terminals and youwill see “Peak HOLD” on the display;
Dial
Clockwise switching gears are as follows:
OFF → Auto mode → AC/DC voltage → Resistance/Capacitance/Continuity/Diode→Temper ature →NCV →AC current
Press the button to switch MAX/MIN
LCD display
COM: Common terminal for all measurements.
Input terminal for voltage, frequency, resistance, continuity, diode, capacitance, temperature measurements.
Wire to be measured
Marked position
SEL: Function selection button
Frequency and Relative value measurements button.
Measure AC/DC Voltage
The minimum voltage of this product is 0.8V. When the measured voltage is higher than 0.8V, the product will display the reading;
Connect the black test lead to the COM Terminal and connect the red test lead to the Terminal;
The DC or AC voltage will be matched automatically when it’s in “ ”, press SEL to switch them when it’s in “ “;
Touch the probes to the correct test points of the circuit to measure the voltage;
Read the measured voltage on the display.
Measure AC Current Only
Keep the probes not put in the jacks, turn power switch on;
Push the jaw release and center the wire within the clamp jaws (as in the picture).
The wire should be in the marked position to keep measurement accuracy;
Read the measured current on the display.
*Caution:

  * Do not measure current that exceeds the MAX Value as indicated in the Specifications;
  * Measure one wire at a time because current moving in different directions will cancel each other out.

Measure Resistance
Connect the black test lead to the COM Terminal and connect the red test lead to the Terminal;
The resistance will be matched automatically;
Touch the probes to the desired test points of the circuit to measure the resistance;
Read the measured resistance on the display.
*Caution:
Disconnect circuit power and discharge all capacitors before you test resistance.
Do not input voltage at the Resistance Mode.
Measure Continuity / Diode
Connect the black test lead to the COM Terminal and connect the red test lead to the Terminal;
Press SEL / Power 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, and the indicator light will be on.
Measure diode: Connect the red probe to the anode side and the black probe to the cathode side of the diode to be tested;
Read the forward biased 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:
Do not input voltage at the Continuity / Diode Mode.
Measure Capacitance
Discharge all capacitors before you test capacitance.
Connect the black test lead to the COM Terminal and the red lead to the Terminal.
Push Power button twice to enter the Capacitance Mode
Connect the red probe to the anode side and the black probe to the cathode side of the capacitor to be tested.
Read the measured capacitance value.
Measure Frequency
Connect the black test lead to the COM Terminal and connect the red test lead to the Terminal;
Press Hz / NCV button once for AC current frequency without connecting the test lead to Terminals.
Press Hz / NCV button once to enter the Frequency Mode for DC voltage frequency after connecting the test lead to Terminals;
Touch the probes to the desired test points of the circuit;
Read the measured frequency value on the display.
Measure NCV
Press Hz / NCV over 2 seconds to toggle 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.
Put the red probe into the terminal, then use the black probe to touh the
Live line and Neutral 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.
Measure Temperature
Connect the black thermocouple probe to the COM Terminal and connect the red thermocouple probe to the Terminal;
Press SEL / POWER once to toggle to the Temperature Mode after connecting the test lead to Terminals, and the display will show the room temperature, to switch ℃/℉, press SEL / POWER button once again;
Touch the probes to the desired test points;
Read the measured temperature on the display.
*Caution:
Do not input voltage at the Temperature Mode.
Measure Inrush current
Turn power on, pull out the probes and press HOLD twice to toggle to Inrush Current Mode, the display will show “INRUSH”;
Push the jaw release and center the wire within the clamp jaws. The wire should be in the marked position to keep measurement accuracy;
Turn on the engine or motor equipment, and the product will capture the maximum current within 100ms when motor is starting;
Read the measured temperature on the display.
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 Hz / NCV button when turning on the product, you will hear five 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.
All rights reserved. Specifications are subject to change without notice.