ZOYI ZT-XR1 Multimeter & Battery Internal Resistance Tester

1. Introduction

The ZOYI ZT-XR1 is a versatile 2-in-1 Multimeter and Battery Internal Resistance Tester designed for a wide range of electrical measurements and battery analysis. This device supports voltage and internal resistance measurements for various battery types, including Li-ion, LiFePO4, Lead-acid, and 18650 batteries. With its 4½-digit, 25,000-count display, auto-ranging capabilities, and comprehensive functions, it is an essential tool for engineers, electricians, maintenance personnel, and DIY enthusiasts.

This manual provides detailed instructions for the safe and effective use of your ZOYI ZT-XR1. Please read it thoroughly before operation and keep it for future reference.

2. Safety Information

WARNING: To avoid electric shock or personal injury, please read and understand all safety information before using this product.

• Always ensure the device is in the correct measurement mode before connecting test leads to a circuit.
• Do not exceed the maximum input values for any function.
• Inspect test leads for damage before each use. Replace if insulation is compromised.
• Do not use the device if it appears damaged or is not operating properly.
• Keep fingers behind the finger guards on the test probes during measurements.
• When measuring current, ensure the device is connected in series with the load.
• When measuring voltage, connect the device in parallel with the circuit.
• Always disconnect power to the circuit and discharge high-voltage capacitors before measuring resistance, continuity, diodes, or capacitance.
• Use caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC. These voltages pose a shock hazard.
• Do not operate the device in explosive gas, vapor, or dusty environments.

3. Package Contents

Verify that all items are present in your package:

Image: The ZOYI ZT-XR1 Multimeter and its complete set of accessories, including test leads, 4-wire Kelvin clips, USB-C cable, temperature probe, and carrying pouch.

• ZOYI ZT-XR1 Multimeter Unit
• Standard Test Leads (Red and Black)
• 4-Wire Kelvin Clips (for internal resistance measurement)
• USB Type-C Charging Cable
• Temperature Probe
• Carrying Pouch
• User Manual (this document)

4. Product Overview

4.1 Device Layout

Image: Front view of the ZOYI ZT-XR1 Multimeter, highlighting its multifunctionality as a multimeter and battery internal resistance tester, with a 25,000 count display.

4.2 Display and Controls

Image: A close-up view of the ZOYI ZT-XR1's high-definition color display, showing voltage and resistance readings.

The ZT-XR1 features a 2.4-inch high-definition color display with a 5-digit, 25,000-count resolution. Key controls include:

• Power Button: Turns the device ON/OFF. Press and hold for >2 seconds to clear data.
• BATT DMM Button: Toggles between Battery Internal Resistance Test mode and Digital Multimeter mode.
• Hz/mV Button: Selects Frequency or Millivolt measurement.
• Diode/Continuity/Capacitance Button: Cycles through Diode Test, Continuity Test, and Capacitance measurement modes.
• RANGE/SPEED/REC Button: Manually selects measurement range, adjusts measurement speed, or activates recording mode.
• OK/MENU Button: Confirms selections or accesses the menu.
• HOLD/>2S ZERO Button: Holds the current reading. Press and hold for >2 seconds to perform quick zeroing.

4.3 Input Terminals

• DC1000V MAX: Input for DC voltage measurements up to 1000V.
• BATT: Dedicated input for battery internal resistance testing.
• VΩHz: Input for AC/DC voltage, resistance, frequency, capacitance, diode, and continuity measurements.
• COM: Common (negative) input terminal for all measurements.

5. Setup

5.1 Initial Charging

The ZT-XR1 is powered by a built-in 2000mAh rechargeable lithium battery. Before first use, or if the battery is low, charge the device using the provided USB Type-C cable.

Image: The ZOYI ZT-XR1 Multimeter connected to a USB-C cable for charging its 2000mAh high-capacity lithium battery.

1. Connect the USB Type-C cable to the charging port on the device.
2. Connect the other end of the cable to a 5V/1A USB power adapter (not included) or a computer USB port.
3. The battery indicator on the display will show charging status.
4. Charge until the battery indicator shows full.

5.2 Connecting Test Leads

Always ensure test leads are securely connected to the correct input terminals for the desired measurement.

• For standard multimeter functions (voltage, resistance, capacitance, etc.), connect the red test lead to the VΩHz terminal and the black test lead to the COM terminal.
• For battery internal resistance testing, use the provided 4-wire Kelvin clips. Connect the red clips to the positive terminal of the battery and the black clips to the negative terminal. Ensure a good connection for accurate readings.

6. Operating Instructions

6.1 General Multimeter Functions

Image: The ZOYI ZT-XR1 Multimeter in use, measuring AC voltage from a wall outlet, demonstrating its capability for AC/DC voltage, resistance, capacitance, continuity, frequency, and diode testing.

The ZT-XR1 supports auto-ranging and auto-identification for most common measurements. Press the 'BATT DMM' button to ensure you are in Digital Multimeter mode.

• AC/DC Voltage Measurement: Connect test leads to VΩHz and COM. The device will automatically detect AC or DC voltage.
• Resistance Measurement: Connect test leads to VΩHz and COM. Ensure the circuit is de-energized.
• Capacitance Measurement: Connect test leads to VΩHz and COM. Ensure the capacitor is discharged before measurement. Use the Diode/Continuity/Capacitance button to select capacitance mode.
• Diode Test: Connect test leads to VΩHz and COM. Use the Diode/Continuity/Capacitance button to select diode mode.
• Continuity Test: Connect test leads to VΩHz and COM. Use the Diode/Continuity/Capacitance button to select continuity mode. An audible buzzer indicates continuity.
• Frequency Measurement: Connect test leads to VΩHz and COM. Use the Hz/mV button to select frequency mode.

6.2 Battery Internal Resistance Testing

The ZT-XR1 is specifically designed for accurate battery internal resistance and voltage measurement using a true 4-wire method with a 1kHz sine wave.

Image: The ZOYI ZT-XR1 Multimeter connected to a cylindrical battery using 4-wire Kelvin clips for accurate internal resistance measurement, showing voltage and resistance readings on the display.

Image: A collage showing different battery types (Button Cell, Alkaline, Carbon, Lithium Polymer, Lithium-Ion, Lead-Acid) that can be tested for internal resistance using the ZOYI ZT-XR1.

1. Press the 'BATT DMM' button to enter Battery Internal Resistance Test mode.
2. Connect the 4-wire Kelvin clips to the BATT input terminals.
3. Attach the red clips to the positive terminal of the battery and the black clips to the negative terminal. Ensure a firm connection.
4. The display will show both the battery voltage and internal resistance.
5. The device supports testing for Li-ion, LiFePO4, Lead-acid, 18650, Button Cell, Alkaline, Carbon, and Lithium Polymer batteries.

6.3 Temperature Measurement

The ZT-XR1 can measure temperature using the included temperature probe.

Image: The ZOYI ZT-XR1 Multimeter displaying a temperature reading while its probe is immersed in a liquid, illustrating its capability for temperature measurement from -20°C to 1000°C.

1. Connect the temperature probe to the appropriate input terminals (refer to the device markings for probe connection).
2. Select the temperature measurement mode (usually indicated by °C/°F).
3. Place the probe in contact with the object or environment whose temperature you wish to measure.
4. The display will show the temperature reading.

6.4 Battery Sorting Function

The device includes a battery sorting function, which helps categorize batteries based on their measured internal resistance and voltage characteristics. Refer to the on-screen menu for specific sorting criteria and options.

7. Maintenance

7.1 Cleaning

Wipe the device with a damp cloth and mild detergent. Do not use abrasives or solvents. Ensure the device is dry before storage or use.

7.2 Battery Care

The ZT-XR1 features a low power consumption design and an auto power-off function to conserve battery life.

Image: The ZOYI ZT-XR1 Multimeter display showing a timer graphic, indicating its user-friendly auto power-off function with adjustable shutdown timing to save power.

• Recharge the battery when the low battery indicator appears.
• For long-term storage, charge the battery to approximately 50% and store in a cool, dry place. Recharge every 3-6 months to prevent deep discharge.
• The device has an auto power-off function with adjustable shutdown timing to save power.

7.3 Firmware Upgrade

The ZT-XR1 supports firmware upgrades. Check the manufacturer's website for the latest firmware versions and instructions.

8. Troubleshooting

If you encounter issues with your ZOYI ZT-XR1, please refer to the following common troubleshooting steps:

• Device does not power on: Ensure the battery is charged. Connect the USB-C cable and try again.
• Inaccurate readings: Check test lead connections. Ensure the correct measurement mode is selected. Verify the circuit is properly prepared (e.g., de-energized for resistance). Calibrate if necessary (refer to advanced settings in the menu).
• Display is blank or frozen: Try pressing and holding the power button for >2 seconds to force a reset.
• No continuity beep: Ensure continuity mode is selected and the circuit is complete.
• Battery internal resistance readings are inconsistent: Ensure the 4-wire Kelvin clips have good contact with the battery terminals. Clean the battery terminals if necessary.

If the problem persists, contact customer support for further assistance.

9. Specifications

Image: A detailed table outlining the technical specifications of the ZOYI ZT-XR1 Multimeter, including ranges and accuracies for AC/DC voltage, resistance, internal resistance, capacitance, frequency, diode, continuity, display, charging, battery type, functions, language, firmware upgrade, dimensions, and weight.

10. User Tips

No specific user tips were available from reviews or Q&A for this product. General tips for multimeters and battery testers include:

• Always start with the highest range when measuring an unknown voltage or current to prevent damage to the meter.
• Ensure good contact between probes/clips and the circuit/battery terminals for accurate readings.
• For internal resistance measurements, ensure the battery is at a stable temperature for consistent results.
• Regularly check the battery level of the ZT-XR1 to avoid interruptions during critical measurements.

11. 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.