ZOYI ZT-QS9 Digital Clamp Multimeter User Manual

: June 1, 2024
: ZOYI

Table of Contents

A. Introduction
B. Safety Information
Safety symbols:
C. Specifications
D. Instruction
E. General Maintenance
F. Troubleshooting
LIMITED WARRANTY AND LIMITATION OF LIABILITY
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ZOYI ZT-QS9 Digital Clamp Multimeter User Manual

A. Introduction

This product is a battery-powered, true-rms, auto ranging digital clamp multimeter with a 6000 counts LCD display and a backlight.

B. 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:

| Hazardous Voltage| | Earth
---|---|---|---
| Double Insulated| | Low Battery
| Risk of Danger. Checkthe User Manual.| | N/ L Wire Judgement

C. Specifications

Electrical Specifications

Function| Range| Resolution| Accuracy| MAX.Value| Frequency Response
DC Voltage (V)| 6.000V| 0.001V| ±(0.5%+3)| 600V|
60.00V| 0.01V
600.0V| 0.1V
AC Voltage (V)| 6.000V| 0.001V| ±(1.0%+3)| 600V| 40Hz-1kHz
60.00V| 0.01V
600.0V| 0.1V
DC Current (D)| 60.00A| 0.01A| ±(2.0%+30)| 600A|
600.0A| 0.1A
AD Current (D)| 60.0A| 0.01A| 40Hz-400Hz
600.0A| 0.1A
Function| Range| Resolutio n| Accuracy | MAX.Value| Frequency Response
---|---|---|---|---|---
Resistance| 600.0Ω| 0.1Ω| ±(1.5%+3)| 60MΩ
6.000kΩ| 0.001kΩ
60.00kΩ| 0.01kΩ| ±(0.5%+3)
600.0kΩ| 0.1kΩ
6.000MΩ| 0.001MΩ
60.00MΩ| 0.01MΩ| ±(1.5%+3)
Capacitance| 6.000nF| 0.001nF| ±(5.0%+20)| 60.00mF
60.00nF| 0.01nF| ±(2.0%+5)
600.0nF| 0.1nF
6.000μF| 0.001μF
60.00μF| 0.01μF
600.0μF| 0.1μF
6.000mF| 0.001mF| ±(5.0%+5)| 60.00mF
60.00mF| 0.01mF
Frequency| 60.00Hz| 0.01Hz| ±(0.1%+2)| 300.0kHz
| 600.0Hz| 0.1Hz
| 6.000kHz| 0.001kHz
| 60.00kHz| 00.1kHz
| 300.0kHz| 0.1kHz
Diode| √
Continuit| √
Inrush current| √
Flashlight| √
Temperature| (-30~1000)℃| 1℃| ±(2.5%+5）| 1000℃|
(-22~1832)℉| 1℉| 1832℉
General Specifications

Display（LCD）| 6000 counts
Ranging| Auto
Material| ABS
Update Rate| 3 times/second
Ture RMS| √
Data Hold| √
Low Battery Alert| √
Auto Power Off| √
Mechanical Specifications

D. Instruction

Front Panel（see the picture on the right

Front Panel

Jaw
Flashlight
Jaw trigger
Hold / Flashlight
HOLD: To press this button once and you will see “HOLD” on the display. Flashlight: Long press this button to turn on/off the flashlight .
Dial
Turn the dial to select the gear you want to measure. Switch to OFF for power off.
SEL / NCV
Long press this button for more then two seconds to enter NVC measurement. After inserting the teat leads, press the button. Short press the button can switch continuity/diode, capacitance, temperature, AC/DC and other measurements.
INR/PEAK
Press this button to enter INRUSH test in current measurement mode; Press this button to hold voltage reading (PEAK HOLD) while in voltage measurement mode.
HZ/REL
In AC mode, press this button to start frequency measurement; in capacitance and current mode, long press this button to enter relative value measurement (REL)
LCD display
COM: Common terminal for all measurements.
Red test lead jack, common test signal input port
Wire to be measured.

Measure AC/DC Voltage

This product has dual impedance voltage detection function. The “ ” gear is 10MΩ high input impedance measurement gear used for general AC and DC voltage detection; “ ” is the 600 K ω low input impedance measurement gear, which can avoid the possibility of measurement error caused by stray voltage or false voltage in the measurement circuit, so as to accurately determine whether the voltage really exists.
Connect the black test lead to the COM Terminal and connect the red test lead to the Terminal;
Ac/DC voltage measurementswitch by pressing SEL button.
Touch the probes to the correct test points of the circuit to measure the voltage;
Read the measured voltage 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 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;

Turn the dial to resistance, diode, continuity gears;
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 / Diode

Connect the black test lead to the COM Terminal and connect the red test lead to
the Terminal;
Turn the dial to “ “, press SEL once to enter diode measurement mode, and press SEL again to enter continuity measurement 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 capacitorto 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;
When measuring the AC current frequency, press the “HZ/REL” button to read the value directly without inserting the test leads. To measure the AC voltage frequency, press the “HZ/REL” button once after inserting the test leads to enter the frequency measurement mode;
Touch the probes to the desired test points of the circuit;
Read the measured frequency value on the display.

Measure REL
When in capacitance and current measurement mode, long press the “HZ/REL” button 2S to enter the relative value test mode, the “REL” icon will be displayed in the upper left corner of the display screen; press this button again to exit relative value measurement.
Measure NCV

Press SEL / 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;
Turn the dial to the temperature test gear and enter the temperature measurement. The screen displays the normal temperature by default;
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.

Measure Inrush current

Turn the dial to current, press the “INR/PEAK” button; enter the start current measurement 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.

Peak Hold

Turn the dial to the voltage measuring gear, insert the test lead, press “INR/PEAK“ button to enter the peak hold function once, the display will show “PEAK HOLD”;
Contact the correct test point on the circuit with the test lead;
Read the measured frequency value on the display.

Auto Power Off

The product automatically powers off after 15 minutes of inactivity;
The builtin beeper beeps 5 times 1 minute before power off;
To restart the product, press any button;
To disable the Auto Power Off function, hold down the SEL / NCV button when turning on the product, You will hear the buzzer sound four times, at which point the “ ” symbol in the upper left corner of the screen disappears, indicating that the automatic shutdown has been cancelled.

E. General Maintenance

Beyond replacing batteries and fuses, do not attemptto 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 inputsignals 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.

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.

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

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.