UT81C - Multimeter Uni-T - Free user manual and instructions
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| Product Type | Digital Multimeter with Oscilloscope |
| Brand | Uni-T |
| Model | UT81C |
| Display | 2.4-inch TFT Color Display (320x240) |
| True RMS | Yes |
| AC Voltage Range | 0.001V to 750V |
| DC Voltage Range | 0.001V to 1000V |
| AC Current Range | 0.001A to 10A |
| DC Current Range | 0.001A to 10A |
| Resistance Range | 0.1Ω to 40MΩ |
| Capacitance Range | 1pF to 100mF |
| Frequency Range | 1Hz to 10MHz |
| Duty Cycle | 0.1% to 99.9% |
| Oscilloscope Bandwidth | 1MHz |
| Sample Rate | 10MS/s |
| Diode Test | Yes |
| Continuity Test | Yes |
| Data Logging | Yes (USB & SD card support) |
| Safety Rating | CAT II 600V |
| Power Supply | 6 x AA batteries or 9V DC adapter |
| Dimensions | 230 x 118 x 58 mm |
| Weight | Approx. 0.8 kg |
| Accessories Included | Test leads, thermocouple, USB cable, software CD, manual |
Frequently Asked Questions - UT81C Uni-T
How do I measure AC voltage with the UT81C?
Turn the rotary switch to the V~ position. Connect the black lead to COM and red lead to VΩmA. Read the value on the display. Press the AC/DC button if needed.
What is the maximum voltage the UT81C can measure?
The UT81C can measure up to 1000V DC and 750V AC. Do not exceed these limits to avoid damage.
How do I use the oscilloscope function?
Set the rotary switch to the SCOPE mode. Connect the probe to the signal. Adjust time/div and volts/div using the arrow keys. Press Auto for automatic settings.
What batteries does the UT81C use?
It uses 6 x AA batteries (1.5V each). Alternatively, you can use a 9V DC power adapter (center positive).
How can I log data on the UT81C?
Insert an SD card (FAT32 format) into the slot. Press the DATA button to start/stop logging. You can also connect via USB to a PC using the included software.
What does the 'True RMS' feature mean?
True RMS accurately measures non-sinusoidal AC signals (e.g., square waves, distorted waveforms). This provides more precise readings than average-responding meters.
How do I measure temperature with the UT81C?
Connect the included thermocouple to the K-type input. Set the rotary switch to TEMP and read the temperature in °C or °F (press SELECT to switch).
What is the safety rating of the UT81C?
The meter is rated CAT II 600V. It is designed for measurements on circuits directly connected to the mains, but not for high-energy installations.
How do I replace the fuse?
Turn off the meter and remove the test leads. Open the battery compartment using a screwdriver. Replace the blown 10A/250V or 500mA/250V fuse (depending on model) with the specified rating.
How do I clean the UT81C?
Use a damp cloth with mild detergent. Do not use solvents or abrasive cleaners. Ensure no moisture enters the case. Remove batteries if not used for a long time.
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