1. Introduction
The ZOYI ZT-X is a high-precision digital multimeter designed for electrical measurements. It features a large LCD display with 9999 counts, True-RMS capabilities, and an auto-ranging function for ease of use. This manual provides detailed instructions for the safe and effective operation, maintenance, and troubleshooting of your ZT-X multimeter.
2. Safety Information
Always observe safety precautions when using any electrical testing equipment. Failure to do so may result in injury or damage to the meter or equipment under test.
- Do not apply more than the rated voltage, as marked on the meter, between terminals or between any terminal and ground.
- Use extreme caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC. Such voltages pose a shock hazard.
- Keep your fingers behind the probe barriers during measurements.
- Replace the battery as soon as the low battery indicator appears to ensure accurate readings.
- Do not operate the meter if it appears damaged or if the case is not fully closed.
- Ensure the correct function and range are selected before making measurements.
- The device features 550V high-voltage protection, but always exercise caution.
3. Product Overview
The ZOYI ZT-X Digital Multimeter is equipped with a range of features for comprehensive electrical testing.
3.1 Key Features
- Automatic/Manual Ranging
- True RMS Measurement
- HD Reverse Display (three large screens)
- 9999 High Precision Display Counts
- Data Retention (HOLD function)
- Automatic Shutdown
- NCV (Non-Contact Voltage) Induced Voltage Measurement
- Frequency and Duty Cycle Measurement
- Temperature Measurement
- Capacitance, Resistance, Diode, and Continuity Testing
- Relative Value Measurement
- Push-button single-hand operation
3.2 Components
- Power Button: Turns the device on/off.
- NCV Button: Activates Non-Contact Voltage detection.
- Temperature/AC/DC mV Button: Cycles through temperature, AC millivolt, and DC millivolt measurements.
- 100MΩ Button: Likely for specific resistance range selection or function.
- RANGE Button: Toggles between auto-ranging and manual ranging modes.
- Hz% Button: For Frequency and Duty Cycle measurements.
- HOLD / >2S REL Button: Short press to hold data, long press for relative value measurement.
- Current Jack (A): Input for high current measurements (up to 9.999A).
- mA Current Jack (mA): Input for milliampere current measurements (up to 9.999A).
- μA Current Jack (μA): Input for microampere current measurements (up to 200mA MAX).
- COM Jack: Common (negative) input for all measurements.
- Function Jack (VΩHz+): Input for voltage, resistance, frequency, capacitance, diode, and continuity measurements.
- Back Bracket: For propping up the multimeter.
4. Setup
4.1 Battery Installation
The ZT-X multimeter requires batteries for operation (not included due to customs regulations). To install:
- Ensure the multimeter is turned off and test leads are disconnected.
- Locate the battery compartment on the back of the meter.
- Unscrew the battery cover and remove it.
- Insert the required batteries, observing correct polarity (+ and -).
- Replace the battery cover and secure it with the screw.
4.2 Connecting Test Leads
Always connect the test leads correctly for accurate and safe measurements.
- Insert the black test lead into the COM (Common) jack.
- For most measurements (Voltage, Resistance, Capacitance, Frequency, Diode, Continuity), insert the red test lead into the VΩHz+ jack.
- For current measurements, insert the red test lead into the appropriate current jack (A, mA, or μA) depending on the expected current level.
5. Operating Instructions
The ZT-X multimeter offers various measurement modes. Refer to the labeled diagram (Figure 2) for button locations.
5.1 Power On/Off
Press the Power Button to turn the multimeter on or off. The device features an automatic power-off function to conserve battery life after a period of inactivity.
5.2 Auto Ranging vs. Manual Ranging
The ZT-X defaults to auto-ranging. To switch to manual ranging, press the RANGE button. Pressing it repeatedly will cycle through available manual ranges. To return to auto-ranging, long-press the RANGE button.
5.3 Voltage Measurement (AC/DC)
- Connect the black lead to COM and the red lead to VΩHz+.
- Turn on the multimeter. The display will show voltage mode.
- Select AC or DC voltage using the appropriate button if available, or the meter will auto-detect.
- Connect the test probes in parallel to the circuit or component you wish to measure.
5.4 Current Measurement (AC/DC)
- Connect the black lead to COM.
- Connect the red lead to the appropriate current jack (A, mA, or μA) based on the expected current.
- Turn on the multimeter and select the current measurement mode.
- Connect the test probes in series with the circuit.
5.5 Resistance Measurement
- Connect the black lead to COM and the red lead to VΩHz+.
- Turn on the multimeter and select the resistance (Ω) mode.
- Ensure the circuit or component is de-energized before measuring resistance.
- Connect the test probes across the component.
5.6 Capacitance Measurement
- Connect the black lead to COM and the red lead to VΩHz+.
- Turn on the multimeter and select the capacitance (F) mode.
- Ensure the capacitor is fully discharged before measurement.
- Connect the test probes across the capacitor.
5.7 Frequency and Duty Cycle Measurement
- Connect the black lead to COM and the red lead to VΩHz+.
- Turn on the multimeter and press the Hz% button to select frequency or duty cycle mode.
- Connect the test probes to the signal source.
5.8 Temperature Measurement
- Connect the black lead to COM and the red lead to VΩHz+.
- Turn on the multimeter and press the Temperature/AC/DC mV button to select temperature mode.
- Connect a K-type thermocouple (if included) to the input jacks, observing polarity.
- Place the thermocouple probe on or in the object whose temperature you wish to measure.
5.9 NCV (Non-Contact Voltage) Measurement
- Press the NCV button.
- Move the top of the multimeter near a live AC voltage source. The meter will indicate the presence of AC voltage through an audible beep and/or visual indicator.
5.10 Diode and Continuity Testing
- Connect the black lead to COM and the red lead to VΩHz+.
- Turn on the multimeter and select the diode/continuity mode.
- For diode test, connect probes across the diode. For continuity, connect probes across the circuit. An audible beep indicates continuity.
5.11 Data Hold and Relative Value
- Data Hold: Short press the HOLD button to freeze the current reading on the display. Press again to release.
- Relative Value: Long press the REL button to store the current reading as a reference. Subsequent measurements will be displayed as a deviation from this reference value. Long press again to exit.
6. Maintenance
6.1 Cleaning
Wipe the meter with a damp cloth and mild detergent. Do not use abrasives or solvents. Keep the jacks free of dust and debris.
6.2 Battery Replacement
When the low battery indicator appears on the display, replace the batteries immediately to ensure accurate readings. Follow the battery installation steps in Section 4.1.
6.3 Fuse Replacement
If the current measurement function stops working, the fuse may need replacement. Refer to the specifications for the correct fuse type and rating. Fuse replacement should only be performed by qualified personnel.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Meter does not power on | Dead batteries; Incorrect battery installation | Replace batteries; Check battery polarity |
| No reading or 'OL' displayed | Open circuit; Out of range; Incorrect function selected | Check connections; Select higher range or auto-range; Select correct function |
| Inaccurate readings | Low battery; Incorrect range; External interference | Replace batteries; Use auto-range or appropriate manual range; Move away from strong electromagnetic fields |
| Current measurement not working | Blown fuse | Replace fuse (refer to Section 6.3) |
8. Specifications
| Parameter | Value |
|---|---|
| Model Number | ZT-X |
| Display Type | Digital Display (9999 Counts) |
| Operating Mode | Auto Range |
| DC Voltage | Up to 1000V |
| AC Voltage | Up to 750V |
| DC Current | Up to 9.999A |
| AC Current | Up to 9.999A |
| Measuring Resistance Range | Up to 99.99MΩ |
| Measuring Capacitance Range | Up to 9.999mF |
| Operating Temperature | 0 - 40 ℃ |
| DIY Supplies | Electrical |
| Certification | CE |
| Origin | Mainland China |
| Package Length | 25 cm |
| Package Width | 15 cm |
| Package Height | 10 cm |
| Package Weight | 0.35 kg |
9. User Tips
- For quick checks, the NCV function is very useful for detecting live wires without direct contact.
- Always start with the highest range when measuring an unknown voltage or current to prevent overloading the meter, although the auto-ranging feature helps mitigate this risk.
- When measuring resistance, ensure the component is isolated from the circuit to get an accurate reading.
- The data hold function is handy for taking readings in hard-to-see locations.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please contact the seller or manufacturer directly. Keep your purchase receipt as proof of purchase.
