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Summary of Contents for UNI-T UT121 Series
- Page 1 P/N:110401111426X UT121A LIVE True RMS CAT III 600V LIVE UT121A/UT121B Smart Digital Multimeter...
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Page 2: Table Of Contents
UT121A/121B User Manual Contents I. Overview ---------------------------------------------------- 3 II. Features ---------------------------------------------------- 3 III. Accessories ------------------------------------------------ 3 IV. Safety Information --------------------------------------- 4 V. Electrical Symbols --------------------------------------- 5 VI. General Specifications --------------------------------- 5 VII. External Structure --------------------------------------- 6 VIII. Button Descriptions -------------------------------------7 IX. -
Page 3: Overview
UT121A/121B User Manual UT121A/121B User Manual I. Overview IV. Safety Information Note the “Warning labels and sentences”. A Warning identifies conditions and procedures UT121A/UT121B is a pocket-sized smart multimeter , it can identify functions and ranges that are dangerous to the user and that can cause damage to the Product or the automatically according to the input signal, reducing operating difficulty effectively and equipment under test. -
Page 4: Electrical Symbols
UT121A/121B User Manual UT121A/121B User Manual VII. External Structure (Figure 1) V. Electrical Symbols 1. LCD display screen (Display measurement data and function symbols) Symbol Description Symbol Description 2. Power on/off 3. Switch between NCV and LIVE functions High voltage Alternating voltage or current 4. -
Page 5: Button Descriptions
UT121A/121B User Manual UT121A/121B User Manual VIII. Button Descriptions IX. Operating Instructions 1. “ ” button (UT121A) 1. AC/DC Voltage Measurement a) Long press this button for about ≥2 seconds to turn on the product, long press again 1) Connect red test lead with “VΩ” terminal, and black with “COM” terminal. to turn it off. - Page 6 UT121A/121B User Manual UT121A/121B User Manual 7. Temperature Measurement 4. Diode Measurement (UT121B) 1) Detecting ambient temperature automatically 1) Connect red test lead with “VΩ” terminal, and black with “COM” terminal. The polarity The product is designed with automatic detection of ambient temperature (Shown in of red test lead is “+”, and black is “-”.
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Page 7: Technical Specifications
UT121A/121B User Manual UT121A/121B User Manual 10. Other Functions 9. LIVE Detection (Figure 3) Auto power off: The product powers off automatically after 15 minutes of inactivity. In The red test lead connects with “V” terminal, and then makes contact with MAINS outlet auto-off state, long press “... - Page 8 UT121A/121B User Manual UT121A/121B User Manual Range to ensure accuracy: 5%~100% of range (2) AC Voltage 6000Ω (UT121A): Measured value = Displayed value – Value of shorted test lead Range Resolution Accuracy Overload Protection 600.0Ω (UT121B): Measured value = Displayed value – Value of shorted test lead Open circuit voltage: About 0.5V 6.000V 0.001V...
- Page 9 UT121A/121B User Manual UT121A/121B User Manual (8) Temperature (UT121B) XI. Maintenance (Figure 4) Warning: Please remove the test leads before opening the bottom cover. Range Accuracy Resolution Overload Protection 1. When the product is not in use, please power it off to save energy. -40°C~40°C ±3 2.
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