1. Introduction
The ZOYI ZT-5566 Digital Bench Multimeter is a unique multi-functional device featuring a 19999-digit dual display and an analog bar graph. It offers high precision measurements at approximately 3 readings per second. This versatile instrument combines the functions of a digital multimeter with a Bluetooth speaker, allowing for both electrical measurements and audio playback.
Key functions include measuring DC/AC Voltage, DC/AC Currents, Resistance (Ω), Capacitance, Frequency (Hz), Duty Cycle, Diode, and Continuity. The meter also provides an analog bar and unit symbol display, data holding, relative value measuring, and maximal/minimal value measuring. Additionally, it is equipped with a clock, alarm clock, and ambient temperature display.
2. Safety Information
Please read and understand all safety instructions before operating the ZOYI ZT-5566 multimeter. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Always ensure the multimeter is in good working condition before use.
- Do not use the meter if it appears damaged or if the insulation on the test leads is compromised.
- This device meets CAT III 1000V and CAT IV 600V safety levels. Always adhere to these ratings and do not attempt to measure voltages or currents exceeding the specified limits.
- The multimeter features AC 550V anti-burn protection under non-current gear and double ceramic fuse overcurrent protection under current gear. However, always select the correct function and range before making measurements.
- Avoid touching exposed wiring or circuit components while power is applied.
- When measuring current, ensure the meter is connected in series with the circuit and the power is off before connecting/disconnecting.
- Turn off music playback when using the mV range, as it may affect measurement accuracy.
3. Package Contents
Upon opening the package, please verify that all items listed below are present and undamaged:
- 1 x ZOYI ZT-5566 Digital Bench Multimeter
- 1 x Pair of Test Leads
- 1 x USB Charging Cable
- 1 x English User Manual
- 1 x Product Box
- (Optional) 2 x 18650 Lithium Batteries (may be pre-installed or included separately depending on purchase option)
4. Product Overview
Familiarize yourself with the components and controls of your ZOYI ZT-5566 Digital Bench Multimeter.
Front Panel Functions:
| Symbol | Function | Symbol | Function | Symbol | Function |
|---|---|---|---|---|---|
| ① | AC/DC voltage (V) | ② | AC/DC voltage (mV) | ③ | Resistance |
| ④ | Capacitance | ⑤ | Buzzer/Diode | ⑥ | AC/DC Current (A mA) |
| ⑦ | Keeping data (HOLD) | ⑧ | Maximum/Minimum (MAX/MIN) | ⑨ | Relative value measurement (REL) |
| ⑩ | Adjust sound volume/Range | ⑪ | Secondary VA display screen | ⑫ | Main VA display screen |
| ⑬ | Multifunction socket (VΩHz) | ⑭ | General jack (COM) | ⑮ | mA current socket |
| ⑯ | A current jack | ⑰ | Press this key, through the knob can choose the range of the multimeter or control the audio playback volume | ||
Rear Panel Functions:
- Power Switch: Turns the device on/off.
- C/F Switch: Toggles temperature display between Celsius and Fahrenheit.
- Charging Power Interface: USB Type-C port for charging (maximum input DC5V 2A).
- Battery Compartment: Houses the 18650 lithium batteries.
5. Setup
5.1 Battery Installation
The ZT-5566 is powered by two 18650 lithium batteries. These are typically built-in. If replacement is necessary, access the battery compartment on the rear of the device. Ensure correct polarity when inserting new batteries.
5.2 Charging
To charge the multimeter, connect the provided USB charging cable to the charging power interface on the rear of the device and to a standard USB power adapter (DC5V 2A max input).
5.3 Power On/Off
Press the Power Switch located on the rear panel to turn the multimeter on or off.
6. Operating Instructions
6.1 General Measurement
The ZT-5566 features auto-ranging for most measurements. Connect the test leads to the appropriate input jacks (VΩHz, COM, mA, A) based on the desired measurement type. The main display (⑫) will show the measured value, and the secondary display (⑪) may show additional information like temperature or time.
6.2 DC/AC Voltage Measurement
To measure voltage, connect the red test lead to the VΩHz jack (⑬) and the black test lead to the COM jack (⑭). Select the appropriate voltage function (AC or DC) using the function buttons. The display will show the voltage reading.
6.3 DC/AC Current Measurement
For current measurements, connect the red test lead to either the mA jack (⑮) or the A jack (⑯) depending on the expected current range, and the black test lead to the COM jack (⑭). Select the appropriate current function (AC or DC). Ensure the meter is connected in series with the circuit. Caution: Always turn off power to the circuit before connecting the multimeter for current measurement.
6.4 Resistance, Capacitance, Frequency, Diode, Continuity
Connect the test leads to the VΩHz jack (⑬) and the COM jack (⑭). Use the function buttons to select the desired measurement mode (Resistance, Capacitance, Frequency, Diode, or Continuity). The meter will automatically range for most measurements.
6.5 Special Features
- True RMS: Provides accurate measurements for non-sinusoidal AC waveforms.
- Data Hold (HOLD): Press the HOLD button (⑦) to freeze the current reading on the display.
- Maximum/Minimum (MAX/MIN): Press the MAX/MIN button (⑧) to record the highest and lowest readings during a measurement session.
- Relative Value (REL): Press the REL button (⑨) to store the current reading as a reference and display subsequent measurements as a deviation from this reference.
- Backlight: The LCD display has adjustable backlight brightness for clear reading in various lighting conditions.
- Auto Power Off: The meter will automatically power off after a period of inactivity to conserve battery life.
- Clock & Alarm Clock: The secondary display (⑪) can show the current time and be set as an alarm.
- Ambient Temperature Display: The secondary display (⑪) shows the ambient temperature. Use the C/F switch on the rear to change units.
- Voice Broadcast: The multimeter can broadcast measurement values audibly.
6.6 Bluetooth Speaker Function
The ZT-5566 can function as a Bluetooth speaker. Activate Bluetooth on your smartphone or audio device and pair it with the multimeter. You can then play music through the multimeter's speakers. Use the knob (⑰) to adjust the audio playback volume.
7. Specifications
| Parameter | Value |
|---|---|
| Brand Name | ZOYI |
| Model Number | ZT-5566 |
| Display Type | Digital Display (19999 Counts, Dual screen display) |
| Operating Mode | Auto Range |
| DIY Supplies | Electrical |
| Operating Temperature | 0 - 40 ℃ |
| Storage Temperature | -20 ~ 60 ℃; Humidity: <80% |
| Dimensions | 200*135*105mm (7.87in x 5.31in x 4.13in) |
| Weight | 895g (without battery) |
| Material | ABS+TPE |
| Power Supply | USB Powered / Battery |
| Battery | 2 x 18650 lithium battery (Built-in) |
| Certification | CE, FCC Part15.247 (meets EN IEC 61010-1:2010, EN IEC61326-1:2021) |
| Safety Rating | CAT III 1000V, CAT IV 600V |
| Origin | Mainland China |
| Update Rate | 3 times/second |
| True RMS | Yes |
| Data Hold | Yes |
| Backlight | Adjustable |
| Low Battery Indication | Yes |
| Auto Power Off | Yes |
| Diode Test | Yes |
| Continuity Test | Yes |
| Wireless Speaker | Yes (Bluetooth V5.0) |
| Bluetooth Transfer Distance | ≤10m |
| Speaker Rated Power | 2 x 4W RMS |
| Speaker Frequency Response | 100Hz-18KHz |
| Speaker Distortion | ≤1% |
| Speaker Signal to Noise Ratio | ≥76dB |
| Clock | Yes |
| Alarm Clock | Yes |
| Temperature Measurement | Yes (Ambient) |
Measurement Ranges & Accuracy:
| Function | Range | Accuracy |
|---|---|---|
| DC Voltage | 19.999mV / 199.99mV / 1.9999V / 19.999V / 199.99V / 1000.0V | ±(0.05%+3) |
| AC Voltage | 19.999mV / 199.99mV / 1.9999V / 19.999V / 199.99V / 750.0V | ±(0.3%+3) |
| DC Current | 19.999mA / 199.99mA / 1.9999A / 19.999A | ±(0.5%+10) for mA, ±(0.5%+30) for A |
| AC Current | 19.999mA / 199.99mA / 1.9999A / 19.999A | ±(0.8%+10) for mA, ±(0.8%+30) for A |
| Resistance | 199.99Ω / 1.9999kΩ / 19.999kΩ / 199.99kΩ / 1.9999MΩ / 19.999MΩ / 199.99MΩ | ±(0.5%+3) to ±(5.0%+5) |
| Capacitance | 9.999nF / 99.99nF / 999.9nF / 9.999μF / 99.99μF / 999.9μF / 9.999mF | ±(5.0%+20) to ±(5.0%+5) |
| Frequency | 99.99Hz / 999.9Hz / 9.999kHz / 99.99kHz / 999.9kHz / 6.000MHz | ±(0.1%+2) |
8. Maintenance
8.1 Cleaning
To clean the multimeter, wipe the case with a damp cloth and a mild detergent. Do not use abrasives or solvents. Ensure the device is powered off and disconnected from any power source before cleaning.
8.2 Storage
When not in use for extended periods, store the multimeter in a dry, cool place away from direct sunlight and extreme temperatures. If the battery is removable, consider removing it for long-term storage to prevent leakage.
9. Troubleshooting
- No Display/Power: Check if the power switch is on. Ensure the batteries are charged or properly installed.
- Inaccurate Readings: Verify that the correct function and range are selected. Check test lead connections. Ensure no music is playing when measuring in mV range.
- Bluetooth Connectivity Issues: Ensure Bluetooth is enabled on both the multimeter and your audio device. Make sure the devices are within the specified range (≤10m).
- No Audio from Speaker: Check the volume level on both the multimeter and the connected audio device. Ensure Bluetooth is successfully paired.
- "OL" or Overload Indication: This indicates that the measured value exceeds the selected range. Switch to a higher range or a different function if applicable.
10. User Tips
- Sensitive Component Measurement: When measuring very low currents on sensitive components (e.g., phonograph head coils), be aware that even small currents can induce magnetization. The ZT-5566 offers current ranges down to 19.999mA (which is 19999 microamps), allowing for precise low-current measurements. Always exercise caution and consult component specifications to avoid damage or unintended effects.
- Maximize Battery Life: Utilize the auto power-off feature and turn off the backlight when not needed to extend battery life.
- Dual Display Advantage: Take advantage of the dual display to monitor time, temperature, or battery status while performing measurements.
11. Warranty and Support
The ZOYI ZT-5566 Digital Bench Multimeter comes with a 12-month warranty from the date of purchase. This warranty covers manufacturing defects and malfunctions under normal use.
For technical support, warranty claims, or any questions regarding your product, please refer to the contact information provided by your retailer or the official ZOYI support channels.
