1. Introduction
This manual provides detailed instructions for the safe and effective use of your ZOYI Digital Multimeter models ZT98, ZT100, ZT101, and ZT102. These multimeters are versatile tools designed for measuring various electrical parameters, including AC/DC voltage, AC/DC current, resistance, frequency, diode, and continuity. The ZT102 model also includes temperature measurement. Please read this manual thoroughly before operation and keep it for future reference to ensure proper usage and prolong the life of your device.
2. Safety Information
WARNING: To avoid possible electric shock or personal injury, and to avoid possible damage to the Multimeter or to the equipment under test, follow these safety rules:
- Always ensure the multimeter is set to the correct function and range before connecting test leads to a circuit.
- Never apply voltage or current to the meter that exceeds the specified maximum limits.
- Use extreme caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC. These voltages pose a shock hazard.
- Always disconnect the test leads from the circuit before changing functions or ranges.
- Do not use the meter if it is damaged or if the test leads are damaged. Inspect the meter and test leads before use.
- Ensure the battery cover is closed and secured before operating the meter.
- Do not operate the meter around explosive gas, vapor, or dust.
- The ZOYI multimeters are rated for 600V CAT III and 1000V CAT II. Adhere to these safety categories.
3. Package Contents
Upon opening your ZOYI Digital Multimeter package, please verify that all items are present and undamaged:
- Digital Multimeter Unit (ZT98, ZT100, ZT101, or ZT102 model)
- Test Leads (1 pair, red and black)
- Standard User Manual
- Note: 2 x 1.5V AAA batteries are required but NOT included due to customs regulations.
Model-Specific Inclusions:
- ZT100: Includes a Certificate.
- ZT101: Includes a Drawstring Pouch.
- ZT102: Includes a Drawstring Pouch and a Thermocouple Probe.
4. Product Overview
Familiarize yourself with the components of your ZOYI Digital Multimeter:
Image: ZT98 Multimeter with labeled parts including HD backlit screen, function buttons, knob dial, and input jacks.
- Display: Large LCD screen for clear readings, often with backlight.
- Function Buttons: (e.g., BACKLIGHT, AUTO POWER OFF, SEL, HOLD/REL) for additional features.
- Rotary Dial: Used to select the desired measurement function (e.g., V~, V-, Ω, A~, A-, Diode, Continuity, Hz, Temp).
- Input Jacks:
- COM (Common): For the black test lead.
- VΩHz+ (Voltage, Resistance, Frequency, Diode, Continuity): For the red test lead for most measurements.
- mA/uA: For the red test lead when measuring small currents (up to 200mA).
- 10A: For the red test lead when measuring large currents (up to 10A, ZT100/ZT101/ZT102).
Image: ZT98 Multimeter showing its back bracket design and dimensions (130x65x32mm).
5. Setup
5.1 Battery Installation
- Ensure the multimeter is turned OFF.
- Locate the battery compartment on the back of the device.
- Use a screwdriver to open the battery compartment cover.
- Insert two (2) 1.5V AAA batteries, observing the correct polarity (+ and -).
- Replace the battery compartment cover and secure it with the screw.
5.2 Connecting Test Leads
- Insert the black test lead into the 'COM' jack.
- For most measurements (voltage, resistance, frequency, diode, continuity), insert the red test lead into the 'VΩHz+' jack.
- For current measurements, insert the red test lead into the 'mA/uA' jack for small currents or the '10A' jack for large currents (if applicable to your model).
6. Operating Instructions
Always ensure the test leads are correctly connected and the rotary dial is set to the appropriate function before making any measurements.
6.1 AC Voltage Measurement
- Turn the rotary dial to the 'V~' (AC Voltage) position.
- Connect the test leads across the circuit or component you wish to measure.
- Read the AC voltage value on the display.
Image: ZT98 Multimeter measuring AC voltage from a wall socket. The common household voltage is about 220V. The rotary dial is turned to AC voltage, and the instrument pens are inserted into the jack.
6.2 DC Voltage Measurement
- Turn the rotary dial to the 'V-' (DC Voltage) position.
- Connect the red test lead to the positive (+) side and the black test lead to the negative (-) side of the DC source.
- Read the DC voltage value on the display.
Image: ZT98 Multimeter measuring DC voltage from a 9V battery. Turn the dial to DC voltage range and test pen touches positive and negative poles of the battery to measure the battery level.
6.3 Resistance Measurement
- Turn the rotary dial to the 'Ω' (Resistance) position.
- Ensure the circuit is de-energized before measuring resistance.
- Connect the test leads across the component.
- Read the resistance value on the display.
Image: ZT98 Multimeter measuring resistance of a component. Rotate the rotary dial to the resistance gear. Test leads can measure both ends of a resistor element.
6.4 Diode Test
- Turn the rotary dial to the Diode symbol.
- Connect the red test lead to the anode and the black test lead to the cathode of the diode.
- The display will show the forward voltage drop. Reverse the leads to check for open circuit (OL).
6.5 Continuity Test
- Turn the rotary dial to the Continuity symbol (often combined with Diode, indicated by a speaker icon).
- Connect the test leads across the circuit or component.
- If there is continuity (low resistance), the meter will beep.
Image: ZT98 Multimeter performing continuity test. Turn the knob to the position where the buzzer detects the breakpoint, and there will be a 'drip' sound.
6.6 Frequency Measurement (Hz)
- Turn the rotary dial to the 'Hz' position.
- Connect the test leads across the signal source.
- Read the frequency value on the display.
6.7 Temperature Measurement (ZT102 only)
- Turn the rotary dial to the 'Temp' position.
- Connect the thermocouple probe to the appropriate input jacks (usually VΩHz+ and COM).
- Place the tip of the thermocouple probe on the object whose temperature you wish to measure.
- Read the temperature value on the display.
6.8 Data Hold
Press the 'HOLD' button to freeze the current reading on the display. Press it again to release.
6.9 Backlight
Press the 'BACKLIGHT' button to turn the display backlight on or off, improving visibility in low-light conditions.
6.10 Automatic Shut-down
The multimeter features an automatic shut-down function to conserve battery life. It will power off after a period of inactivity. Press any button or turn the rotary dial to wake it up.
7. Specifications
General specifications applicable to all models:
- Dimensions: 130*65*32mm
- Weight: 114 g
- Operating Temperature: 0 - 40 ℃
- DIY Supplies: Electrical
- Certification: CE
- Battery Type: 2 x 1.5V AAA (not included)
- Is Smart Device: No
- High-concerned chemical: None
7.1 ZT98 Specifications
Image: Detailed specifications table for the ZT98 Digital Multimeter.
| Function | Range | Accuracy |
|---|---|---|
| DC Voltage | 200mV/2.000V/20.00V/200.0V/1000V | ±(0.8%+5) / ±(1.0%+5) |
| AC Voltage | 2.000V/20.00V/200.0V/750V | ±(1.2%+5) |
| DC Current | 200.0μA/2000μA/20.00mA/200.0mA | ±(1.5%+5) |
| AC Current | 200.0μA/2000μA/20.00mA/200.0mA | ±(1.5%+5) |
| Resistance | 200.0Ω/2.000kΩ/20.00kΩ/200.0kΩ/2.000MΩ/20.00MΩ | ±(1.0%+5) / ±(2.5%+5) |
| Diode/Continuity | Yes | |
| Maximum Display | 1999 Counts | |
| Operating Mode | Manual Range | |
| Backlight | Yes | |
| Auto Power Off | Yes | |
| Low Battery Alert | Yes |
7.2 ZT100 Specifications
Image: Detailed specifications table for the ZT100 Digital Multimeter.
| Function | Range | Accuracy |
|---|---|---|
| DC Voltage | 400.0mV/4.000V/40.00V/400.0V/1000V | ±(0.8%+4) |
| AC Voltage | 400.0mV/4.000V/40.00V/400.0V/750V | ±(1.2%+4) |
| DC Current | 40.00mA/400.0mA/4.000A/10.00A | ±(1.5%+4) |
| AC Current | 40.00mA/400.0mA/4.000A/10.00A | ±(2.0%+4) |
| Resistance | 400.0Ω/4.000kΩ/40.00kΩ/400.0kΩ/4.000MΩ/40.00MΩ | ±(2.0%+4) |
| Capacitance | 4.000nF/40.00nF/400.0nF/4.000μF/40.00μF/200.0μF | ±(5.0%+20) / ±(3.5%+4) |
| Frequency | 99.99Hz/999.9Hz/9.999kHz/99.99kHz/999.9kHz/9.999MHz | ±(0.1%+2) |
| Duty Cycle | 1%-99% | ±(0.1%+2) |
| Diode/Continuity | Yes | |
| Maximum Display | 4000 Counts | |
| Operating Mode | Auto Ranging | |
| Backlight | Yes | |
| Data Hold | Yes | |
| Auto Power Off | Yes | |
| Low Battery Alert | Yes |
7.3 ZT101 Specifications
Image: Detailed specifications table for the ZT101 Digital Multimeter.
| Function | Range | Accuracy |
|---|---|---|
| DC Voltage | 60.00mV/600.0mV/6.000V/60.00V/600.0V/1000V | ±(0.5%+3) |
| AC Voltage | 60.00mV/600.0mV/6.000V/60.00V/600.0V/750V | ±(1.0%+3) |
| DC Current | 60.00mA/600.0mA/6.000A/10.00A | ±(1.2%+3) |
| AC Current | 60.00mA/600.0mA/6.000A/10.00A | ±(1.5%+3) |
| Resistance | 600.0Ω/6.000kΩ/60.00kΩ/600.0kΩ/6.000MΩ/60.00MΩ | ±(0.5%+3) / ±(1.5%+3) |
| Capacitance | 9.999nF/99.99nF/999.9nF/9.999μF/99.99μF/999.9μF/9.999mF | ±(5.0%+20) / ±(2.0%+5) / ±(5.0%+5) |
| Frequency | 9.999Hz/99.99Hz/999.9Hz/9.999kHz/99.99kHz/999.9kHz/9.999MHz | ±(0.1%+2) |
| Duty Cycle | 1%-99% | ±(0.1%+2) |
| Diode/Continuity | Yes | |
| Maximum Display | 6000 Counts | |
| True RMS | Yes | |
| Operating Mode | Auto Ranging | |
| Backlight | Yes | |
| Data Hold | Yes | |
| Auto Power Off | Yes | |
| Low Battery Alert | Yes |
7.4 ZT102 Specifications
Image: Detailed specifications table for the ZT102 Digital Multimeter.
| Function | Range | Accuracy |
|---|---|---|
| DC Voltage | 60.00mV/600.0mV/6.000V/60.00V/600.0V/1000V | ±(0.5%+3) |
| AC Voltage | 60.00mV/600.0mV/6.000V/60.00V/600.0V/750V | ±(1.0%+3) |
| DC Current | 60.00mA/600.0mA/6.000A/10.00A | ±(1.2%+3) |
| AC Current | 60.00mA/600.0mA/6.000A/10.00A | ±(1.5%+3) |
| Resistance | 600.0Ω/6.000kΩ/60.00kΩ/600.0kΩ/6.000MΩ/60.00MΩ | ±(0.5%+3) / ±(1.5%+3) |
| Capacitance | 9.999nF/99.99nF/999.9nF/9.999μF/99.99μF/999.9μF/9.999mF | ±(5.0%+20) / ±(2.0%+5) / ±(5.0%+5) |
| Frequency | 9.999Hz/99.99Hz/999.9Hz/9.999kHz/99.99kHz/999.9kHz/9.999MHz | ±(0.1%+2) |
| Duty Cycle | 1%-99% | ±(0.1%+2) |
| Temperature | -20~1000 C (-4~1832 F) | ±(2.5%+5) |
| Diode/Continuity | Yes | |
| Maximum Display | 6000 Counts | |
| True RMS | Yes | |
| Operating Mode | Auto Ranging | |
| Backlight | Yes | |
| Data Hold | Yes | |
| Auto Power Off | Yes | |
| Low Battery Alert | Yes |
8. Maintenance
8.1 Cleaning
- Wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents.
- Clean the terminals with a cotton swab and detergent if they become dirty.
8.2 Battery Replacement
When the low battery indicator appears on the display, replace the batteries immediately to ensure accurate readings.
- Turn off the multimeter and disconnect all test leads.
- Open the battery compartment cover on the back of the meter.
- Remove the old batteries and insert new 1.5V AAA batteries, observing correct polarity.
- Close the battery compartment cover securely.
8.3 Storage
If the meter is not to be used for a long period, remove the batteries to prevent battery leakage and damage to the meter. Store the meter in a dry, cool environment.
9. Troubleshooting
- No display or dim display: Check battery installation and replace batteries if necessary.
- Incorrect readings: Ensure the correct function and range are selected. Check test lead connections and ensure they are not damaged. Verify the circuit is de-energized for resistance measurements.
- 'OL' (Overload) displayed: The measured value exceeds the selected range. Switch to a higher range or ensure the input is within the meter's capabilities.
10. User Tips
- Always double-check your function and range selection before connecting to a circuit to prevent damage to the multimeter or the circuit under test.
- For intermittent use, consider removing batteries when storing the multimeter for extended periods to prevent corrosion.
- Utilize the backlight feature in dimly lit environments for better readability of the display.
11. Warranty and Support
ZOYI products are manufactured to high-quality standards. For any technical assistance, warranty claims, or support inquiries, please contact the seller or authorized distributor from whom you purchased the product. Please retain your proof of purchase for warranty purposes.
