Introduction
The UNI-T UT89 Series Digital Multimeters (UT89X, UT89XD, UT89XE) are high-precision, anti-burn multimeters designed for professional use. They offer a wide range of measurement capabilities including AC/DC voltage, AC/DC current, resistance, capacitance, frequency, and temperature. Built with a durable, dual-color injection-molded casing, these meters are designed to withstand challenging work environments. This manual provides essential information for the safe and effective use of your multimeter.
Safety Information
Always observe safety precautions when using the multimeter. Failure to do so may result in electric shock, injury, or damage to the meter or equipment under test.
- Read and understand all instructions before use.
- Do not exceed the maximum input values for any function.
- Do not use the meter if it is damaged or operating abnormally.
- Ensure test leads are properly connected and in good condition.
- Use caution when working with voltages above 30V AC RMS, 42V peak, or 60V DC.
- Replace batteries promptly when the low battery indicator appears.
Product Overview
Key components and features:
- LCD: Digital display for measurement readings.
- Function Switching / REL Measurement: Button to cycle through functions or activate relative measurement.
- Automatic Backlight Sensing Window: Sensor for automatic screen backlight adjustment.
- Data Retention / Flashlight: Button to hold the current reading or activate the flashlight.
- Transistor Measurement Jack: For testing transistors (UT89X/UT89XD).
- Function Selection Switch: Rotary dial to select measurement modes.
- mA/microampere Current Jack: Input for small current measurements.
- 20A Current Gear Jack: Input for high current measurements.
- Public Jack (COM): Common ground input.
- Insulating Protective Cover: Provides durability and drop protection.
Setup
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Battery Installation
The UT89 series multimeters require batteries for operation. Batteries are not included with the device. Please refer to the packaging or the battery compartment cover for the specific battery type (typically AA or AAA batteries).
- Locate the battery compartment on the back of the multimeter.
- Use a screwdriver to open the battery compartment cover.
- Insert the new batteries, ensuring correct polarity (+ and -).
- Close the battery compartment cover and secure it with the screw.
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Connecting Test Leads
Insert the test leads into the appropriate input jacks on the multimeter:
- Connect the red test lead to the 'VΩmA' or '20A' jack, depending on the measurement function.
- Connect the black test lead to the 'COM' (common) jack.
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Initial Power-On
Turn the function selection switch from 'OFF' to any desired measurement function to power on the device. The LCD backlight will automatically activate in low-light conditions.
Operating Instructions
Select the desired function using the rotary dial. For some functions, press the 'SEL' button to cycle through sub-functions (e.g., AC/DC, Diode/Continuity).
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Voltage Measurement (AC/DC)
- Turn the rotary switch to the 'V~' (AC Voltage) or 'V=' (DC Voltage) position.
- Connect the test leads in parallel to the circuit or component to be measured.
- Read the voltage value on the LCD.
Figure 4: UT89XD in use, measuring AC voltage within an electrical panel, demonstrating True RMS capability. -
Current Measurement (AC/DC)
- Turn the rotary switch to the 'A~' (AC Current) or 'A=' (DC Current) position.
- Important: Connect the multimeter in series with the circuit.
- For currents up to 200mA, use the mA/microampere jack. For currents up to 20A, use the 20A jack.
- Read the current value on the LCD.
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Resistance Measurement
- Turn the rotary switch to the 'Ω' (Resistance) position.
- Ensure the circuit or component is de-energized before measuring resistance.
- Connect the test leads across the component.
- Read the resistance value on the LCD.
Figure 5: UT89XD measuring components on a circuit board, demonstrating its use in electronics repair and testing. -
Capacitance Measurement
- Turn the rotary switch to the 'F' (Capacitance) position.
- Ensure capacitors are discharged before measurement.
- Connect the test leads across the capacitor.
- Read the capacitance value on the LCD.
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Frequency Measurement
- Turn the rotary switch to the 'Hz' (Frequency) position.
- Connect the test leads to the signal source.
- Read the frequency value on the LCD.
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Temperature Measurement (UT89X/UT89XE only)
- Turn the rotary switch to the '°C/°F' (Temperature) position.
- Connect the temperature probe (included with UT89X) to the appropriate jacks.
- Place the probe on or near the object to be measured.
- Press the 'SEL/REL' button to switch between Celsius and Fahrenheit.
Figure 6: UT89X performing temperature measurement using its dedicated probe, displaying the reading on the LCD. -
Diode/Continuity Test
- Turn the rotary switch to the 'Diode/Continuity' position.
- For diode test, connect the red lead to the anode and black lead to the cathode.
- For continuity test, connect the leads across the circuit. An audible alarm indicates continuity.
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Transistor Test (UT89X/UT89XD)
- Turn the rotary switch to the 'hFE' position.
- Insert the transistor leads into the corresponding holes in the transistor measurement jack.
- Read the hFE value on the LCD.
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NCV (Non-Contact Voltage)
- Turn the rotary switch to the 'NCV' position.
- Move the top of the multimeter near the conductor.
- The meter will indicate the presence of AC voltage with visual (flashing lights) and audible alerts.
Figure 7: NCV non-contact voltage sensing in action. Green light flashes for 12VAC-48VAC, yellow for 48VAC-220VAC, and flashing red for >220VAC. The image also shows the ability to detect zero line firewire. -
Live Wire Test (UT89XD only)
- Turn the rotary switch to the 'Live' position.
- Insert a single test pen into the live wire socket.
- The screen will display 'Live' and an alarm will sound if a live wire is detected.
Figure 8: Zero fire line measurement using UT89D, illustrating the screen response for firewire and zero line detection. -
LED Test (UT89X only)
- Turn the rotary switch to the 'LED' position.
- Connect the LED to the appropriate jacks.
- The multimeter can output approximately 12V/5mA voltage to test the LED.
Figure 9: UT89X performing an LED test, demonstrating its ability to output voltage for LED diagnostics. -
Flashlight Function
- Press and hold the 'HOLD' button to activate the built-in flashlight, useful for working in dark environments.
Figure 10: The multimeter's LCD automatic backlight and flashlight function, providing illumination for measurements in low-light conditions.
Maintenance
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Cleaning
Wipe the meter with a damp cloth and mild detergent. Do not use abrasives or solvents. Keep the test leads clean and free of debris.
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Battery Replacement
When the low battery indicator appears on the LCD, replace the batteries immediately to ensure accurate readings. Follow the battery installation steps in the Setup section.
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Fuse Replacement
If the current measurement function stops working, the fuse may be blown. Refer to the full product manual for instructions on how to safely replace the internal fuses. Always use fuses of the specified type and rating.
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Storage
When not in use for extended periods, remove the batteries to prevent leakage. Store the multimeter in a cool, dry place, away from direct sunlight and extreme temperatures.
Troubleshooting
- No Display / Faint Display: Check battery charge and ensure they are installed correctly. Replace batteries if necessary.
- Incorrect Readings: Ensure the correct function is selected and test leads are properly connected. Verify the component or circuit is within the meter's measurement range.
- Current Measurement Not Working: Check the fuse. If blown, replace it with a fuse of the correct rating.
- NCV Not Detecting Voltage: Ensure the NCV function is selected and the meter is held close enough to the conductor. Check for strong electromagnetic interference that might affect readings.
Specifications
The UT89 series offers various models with slightly different features. Refer to the table below for a detailed comparison.
| Feature | UT89X | UT89XD | UT89XE |
|---|---|---|---|
| Maximum Display | 6000 | 6000 | 19999 |
| AC and DC Voltage | 1000V | 1000V | 1000V |
| AC and DC Current | 20A | 20A | 20A |
| Resistance | 60MΩ | 60MΩ | 60MΩ |
| Capacitance | 100mF | 100mF | 100mF |
| Frequency | 10MHz | 10MHz | 10MHz |
| Temperature | -40℃ ~ 1000℃ | -40℃ ~ 1000℃ | No such feature |
| Live Wire Test | No such feature | Yes | No such feature |
| LED Test | Yes | No such feature | No such feature |
| Transistor | Yes | Yes | No such feature |
| Diode/Continuity Test | Yes | Yes | Yes |
| Audible Alarm | Yes | Yes | Yes |
| Backlight | Yes | Yes | Yes |
| Automatic Shut-down | Yes | Yes | Yes |
| True RMS | Yes | Yes | Yes |
| Duty Cycle | Yes | Yes | No such feature |
| NCV | Yes | Yes | Yes |
| Flashlight | Yes | Yes | Yes |
| LCD Size | 63*38mm | 63*38mm | 63*38mm |
| Dimensions | 190x89x55mm | ||
| Operating Temperature | 0 - 40 ℃ | ||
| Certification | CE | ||
User Tips
- Battery Type: Remember that batteries are not included. Check your multimeter's battery compartment or packaging for the exact type required (commonly AA or AAA).
- Durability: The UT89 series features a robust, dual-color injection-molded casing designed to withstand drops up to 1 meter. While durable, always handle your multimeter with care to ensure its longevity and accuracy.
- NCV Sensitivity: For accurate Non-Contact Voltage detection, ensure the top of the multimeter is positioned directly over the conductor. Be aware that external electromagnetic fields can sometimes influence NCV readings.
- Backlight & Flashlight: Utilize the automatic LCD backlight and manual flashlight function when working in dimly lit areas to improve visibility and safety.
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.
