UNI-T UT81C Operating Manual

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[Page 1] UNI-T UT81C

P/N:110401103423 ...

[Page 2] UNI-T UT81C

Model UT81C OPERATING MANUAL ...

[Page 3] UNI-T UT81C

Chapter Title Page 6 6 7 8 8 10 11 11 12 13 15 15 15 17 19 19 20 20 22 27 29 31 33 Model UT81C: OPERATING MANUAL 1 Table of Contents 1 Before You Start Overview Unpacking In...

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2 Model UT81C: OPERATING MANUAL 35 37 38 38 39 40 41 41 42 43 43 44 44 45 45 46 46 47 48 49 49 50 Chapter Title Page Table of Contents A. B. C. D. E. F. G. DC Voltage AC Voltage DC ...

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3 Model UT81C: OPERATING MANUAL 50 51 Chapter Title Page Table of Contents H. Frequency and Duty Cycle % I. Capacitance ...

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4 Model UT81C: OPERATING MANUAL 7 10 11 13 Table Title Page List of Tables 1-1 Unpacking Inspection 1-2 International Electrical Symbols 2-1 Reading the Screen 2-2 ...

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5 Model UT81C: OPERATING MANUAL 12 13 17 21 23 24 25 27 29 31 33 35 39 40 Figure Title Page List of Tables 2-1 Meter Structure 2-2 Functional Buttons 3-1 Waveform Displa...

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6 Model UT81C: OPERATING MANUAL Overview This Operating Manual covers information on safety and cautions. Please read the relevant information carefully and observe all the Warnings and Notes strictly. Warning To avoid electric shock or perso...

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7 Item Description Qty Model UT81C: OPERATING MANUAL Unpacking Inspection Open the package case and take out the Meter. Check the items shown on Table 1-1 carefully to see any missing or damaged part: In the event you find any missing or damage, plea...

[Page 10] UNI-T UT81C

8 Model UT81C: OPERATING MANUAL Safety Information This Meter complies with the standards IEC61010 safety measurement requirement: in pollution degree 2, overvoltage category (CAT. II 1000V, CAT.III 600V) and double insulation. CAT.II: Local level, a...

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9 Model UT81C: OPERATING MANUAL shock or damages to the Meter. The rotary switch should be placed in the right position and no any changeover of range shall be made during measurement is conducted to prevent damage of the Meter. When the Meter workin...

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10 Model UT81C: OPERATING MANUAL International Electrical Symbols AC or DC DC Measurement AC Measurement Continuity Test Diode Grounding Double Insulated Warning. Refer to the Operating Manual Deficiency of Built-In Battery Conforms to Standards of E...

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11 Model UT81C: OPERATING MANUAL Chapter 2 Using the Testing Tool Reading the Screen Description The degree of contrast Sleep mode time Display backlight Beeper on and off Confirm Increase Decrease Waveform moves up Waveform moves down Increase a ran...

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12 Model UT81C: OPERATING MANUAL Figure 2-1. Meter Structure The Meter Structure The Figure 2-1 shows the Meter structure. 1. USB Terminals 2. LCD Display 3. Functional Buttons 4. Rotary Switch 5. Power adaptor Input Terminals 6. 10A Input Term...

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13 Model UT81C: OPERATING MANUAL Figure 2-2. Functional Buttons Table 2-2. Functional Buttons Description Software functional buttons, details please refer to the below. Under scope mode, Press Range button to switch between DC and AC measurement Un...

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14 Model UT81C: OPERATING MANUAL Table 2-2. Functional Buttons Buttons Mode Set Save/Call Hold Description To switch between waveform display (scope mode) and digital reading (multimeter mode). This button is only valid when under voltage, frequency...

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15 Model UT81C: OPERATING MANUAL Chapter 3 Making Measurement Introduction Chapter 3 explains how to make measurements. You could turn the Meter off by turning to OFF position or set up the sleep mode from 1-30 minutes. Please must ensure the Meter ...

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16 Model UT81C: OPERATING MANUAL F2: Set the Display Backlight BK Light 15 ENTER F1 F2 F3 F4 The brightness level from 0 to 31. Press F4 to confirm, save and return. Press functional buttons to exit, the setting ...

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17 Model UT81C: OPERATING MANUAL Figure 3-1. Waveform Display Turn the rotary switch to ACV, DCV, Hz, ACA or DCA range, the Meter displays digital reading (Multimeter mode). Press Mode to switch to waveform display (scope mode) as below Figure 4. W...

[Page 20] UNI-T UT81C

18 Model UT81C: OPERATING MANUAL Y-axis adjustment: Press Range button under scope mode, the corresponding functional button: Move Move Rang Rang F1 F2 F3 F4 F1: move up the waveform F2: move down the wavef...

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19 Model UT81C: OPERATING MANUAL Press Trig button under scope mode, the corresponding function buttons: Trig Trig Auto/Norm/Shot Slop Rrise/Fall F1 F2 F3 F4 F1: move the trigger level up F2: m...

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20 Model UT81C: OPERATING MANUAL be returned to working mode to carry out measurement. In order to have more accurate waveform, user can buy an optional BNC probe and scope probe to decrease signal attenuates. The scope probe directly connect to the...

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21 Model UT81C: OPERATING MANUAL Figure 3-2. Voltages Measurement When measuring voltage, the corresponding functional buttons AC / DC REL Rang Rang F1 F2 F3 F4 F1: toggle between AC or DC F2: relative mode (...

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22 Model UT81C: OPERATING MANUAL If the fuse burns out during measurement, the Meter may be damaged or the operator himself may be hurt. To avoid possible damage to the Meter or to the equipment under test, check the Meter’s fuses before measuring ...

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23 Model UT81C: OPERATING MANUAL Figure 3-3. μA Range Measurement To measure ACμA or DCμA currents, set up the Meter as Figure 3-3 and proceed as follows: 1. Insert the red test lead into the μmA terminal and black test lead into the COM ter...

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24 Model UT81C: OPERATING MANUAL Figure 3-4. mA Range Measurement To measure ACmA or DcmA currents, set up the Meter as Figure 3-4 and proceed as follows: 1. Insert the red test lead into the μAmA terminal and black test lead into the COM termi...

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25 Model UT81C: OPERATING MANUAL Figure 3-5. 10A Range Measurement To measure AC 10A or DC 10A currents, set up the Meter as Figure 3-5 and proceed as follows: 1. Insert the red test lead into the 10A terminal and black test lead into the COM ter...

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26 Model UT81C: OPERATING MANUAL NoteWhen measuring current, the corresponding functional buttons: AC / DC REL Rang Rang F1 F2 F3 F4 F1: toggle between AC or DC F2: relative mode (REL will be displayed at t...

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27 Model UT81C: OPERATING MANUAL Figure 3-6. Resistance Measurement Warning To avoid possible damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before measuring resistance. To me...

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28 Model UT81C: OPERATING MANUAL Ω Note1. Insert the red test lead into the Ω terminal and the black test lead into the COM terminal. 2. Set the rotary switch to 3. Connect the test leads across with the object being measured. 4. The measur...

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29 Model UT81C: OPERATING MANUAL Figure 3-7. Diode Test To avoid harms to you, please do not attempt to input voltages higher than 60V DC or 42V rms AC. To avoid damages to the Meter or to the devices under test, disconnect circuit power and discharg...

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30 Model UT81C: OPERATING MANUAL Ω Note1. Insert the red test lead into the Ω terminal and the black test lead into the COM terminal. 2. Set the rotary switch to . 3. For forward voltage drop readings on any semiconductor compo...

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31 Model UT81C: OPERATING MANUAL Figure 3-8. Continuity Test To avoid harms to you, please do not attempt to input voltage higher than 60V DC or 42V rms AC. To avoid possible damages to the Meter or to the devices under test, disconnect circuit power...

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32 Model UT81C: OPERATING MANUAL Ω Note1. Insert the red test lead into the W terminal and the black test lead into the COM terminal. 2. Set the rotary switch to . 3. Connect the test leads across with the object being tested. 4...

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33 Model UT81C: OPERATING MANUAL Figure 3-9. Measuring Frequency / Duty Cycle To avoid harms to you, please do not attempt to input voltage higher than 42V rms. Warning To measure frequency and duty cycle, connect the Meter as Figure 3-9 and do the f...

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34 Model UT81C: OPERATING MANUAL Note The requirement of Input amplitude “a” is as follows: When 1MHz: 300 mV a 30Vrms; 1MHz: 600 mV a 5Vrms It is normal to have few seconds run time when switch from other functions to these functions. Wh...

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35 Model UT81C: OPERATING MANUAL Figure 3-10. Measuring Capacitance To ensure accuracy, the Meter inside is discharged against the tested capacitor To avoid damage to the Meter or to the equipment under test, disconnect circuit power and discharge al...

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36 Model UT81C: OPERATING MANUAL Capacitors larger than 10 F take longer time. If the tested capacitor has polarity, connect the red test lead to positive side and black test lead to negative side. When capacitance measurement has been completed, dis...

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37 Model UT81C: OPERATING MANUAL Chapter 4 Using Software When using the Software, please refer to the Installation Guide of the included CD-ROM. ...

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38 Model UT81C: OPERATING MANUAL Chapter 5 Maintaining The Test Tool This chapter provides basic maintenance information including battery and fuse replacement instruction. Do not attempt to repair or service your Meter unless you are qualified to ...

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39 Model UT81C: OPERATING MANUAL 1.Remove the battery compartment 2.Remove the case bottom 3.I correct type and specification Figure 5-1. Fuse Replacement F0.5AH/1000V F10AH/1000V B. Replacing the Fuses To avoid electrical shock or arc b...

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40 Model UT81C: OPERATING MANUAL Figure 5-2. Battery Replacement C. Replacing the Battery Warning To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator “ �...

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41 Model UT81C: OPERATING MANUAL Chapter 6 Specifications Safety and Compliances Refer to different range input protection voltage IEC 61010 CAT. II 1000V, CAT.III 600V overvoltage and double insulation standard F0.5AH/1000V, ø6×32mm F10AH/1000V, �...

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42 Model UT81C: OPERATING MANUAL Physical Specifications Digital: 3999 counts on display ; updates 2-3 times / second. 0 o C~40 o C (32 o F~104 o F) -10 o C~50 o C (14 o F~122 o F) 75% @ 0 o C~40 o C; 0% @ -10 o C~50 o C. 2000m; 1.5V (R6) x 4 Batte...

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43 Model UT81C: OPERATING MANUAL General Specifications ( Digital Multimeter) When it is under Multimeter mode, you could select either auto or manual ranging. Auto, negative polarity displays “-“ Display OL Display Range Polarity Overloading Bat...

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44 Model UT81C: OPERATING MANUAL Feature Summary 160 x 160 Monochrome When it is under multimeter mode, the Meter automatically selects best range Beeper sounds for resistance readings below threshold. Measure signal on or off time in %. Battery repl...

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45 Model UT81C: OPERATING MANUAL UT81C:16MHz Bandwidth UT81C 80M per second 20mV/div~500V/div (1-2-5) Voltage Sensitivity Maximum input voltage Accuracy (0.1% + 1pix) 1000Vp-p (5%+1pix) Single DC 8 Bits 10MΩ (excluding Multimeter part) Basic Specifi...

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46 Model UT81C: OPERATING MANUAL A. DC Voltage 400mV 4V 40V 400V 1000V Range Resolution Accuracy Overload Protection Input Impedance 100 μV 1mV 10mV 100mV 1V (0.8%+8) (1%+8) 1000V DC or AC Around 10...

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47 Model UT81C: OPERATING MANUAL C. DC Current F0.5AH/1000V, ø6×32mm F10AH/1000V, ø6×32mm (Continuous measurement 10 seconds and interval more than 15 minutes.) Range Resolution Accuracy Overloa...

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48 Model UT81C: OPERATING MANUAL D. AC Current F0.5AH/1000V, ø6×32mm F10AH/1000V, ø6×32mm (Continuous measurement 10 seconds and interval more than 15 minutes.) Range Resolution Accuracy Overload Protec...

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49 Model UT81C: OPERATING MANUAL 400Ω 4kΩ 40kΩ 400kΩ 4MΩ 40MΩ 250VDC or AC rms Range Resolution Accuracy Overload Protection E. Resistance 0.1Ω 1Ω 10Ω 100Ω 1kΩ ...

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50 Model UT81C: OPERATING MANUAL Range Resolution Overload Protection Remarks G. Continuity Test Test l The buzzer sounds when the test resistance is 10Ω. l The buzzer does not sound when the ...

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51 Model UT81C: OPERATING MANUAL 40nF 400nF 4μF 40μF 100μF 250V DC or AC rms Range Resolution Accuracy Overload Protection 10pF 100pF 1nF 10nF 100nF Under REL mode: ...

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52 Model UT81C: OPERATING MANUAL This operating manual is subject to change without notice. ** END ** ...

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53 Model UT81C: OPERATING MANUAL ...