UNI-T UT30B Operating Manual Download Page 1

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CONTENTS

A. Introduction
B.

Safety

Rules

International Electrical Symbols

D. Feature
E. Specification
F. Operation Plate
G. Make Measurement
H. Fuse and battery replacement
I. Accessories

Remark:
The model of UT30B,UT30C,UT30D will be marked as UT30BL,UT30CL
UT30DL,if they have backlight function.

Model UT30B/C/D/F: OPERATING MANUAL

Summary of Contents for UT30B

Page 1: ...al Symbols D Feature E Specification F Operation Plate G Make Measurement H Fuse and battery replacement I Accessories Remark The model of UT30B UT30C UT30D will be marked as UT30BL UT30CL UT30DL if they have backlight function 1 Model UT30B C D F OPERATING MANUAL ...

Page 2: ...th steady operations fashionable structure and highly reliable hand held measuring instrument The meter can measure DC AC voltage DC AC current Resistance Frequency Temperature Diode Transistor hFE and Continuity It is an ideal tool for maintenance 2 Model UT30B C D F OPERATING MANUAL ...

Page 3: ... before using the meter l As soon as the battery indicator s appear replace the battery to ensure accurate readings l Set the meter to suitable function and range before each measurement l Tested values over the maximum range of each measurement can cause damages to the meter or electric shock to users l To avoid damages of the meter do not turn the rotary switch during measurement l When measurin...

Page 4: ...nger to the user l Periodically wipe the case with damp cloth and mild detergent Do not use abrasives and solvents l The meter is designed to withstand the stated maximum voltages If it s not possible to exclude without doubts that impulses transients disturbance or for other reasons these voltages are exceeded a suitable prescaler 1 10 must be used B Safety Rules 2 4 Model UT30B C D F OPERATING M...

Page 5: ...C International Electrical Symbols Low Battery Earth Ground Warning Double Insulation AC current Diode DC current Buzzer Fuse AC or DC 5 Model UT30B C D F OPERATING MANUAL ...

Page 6: ... and is used to measure voltage up to 500V resistance and current up to 200mA C The 10A MAX input terminal is always connected with the red test lead and is used to measure current greater than 200mA but no more than 10A 2 10A Terminal non fused 3 mA Terminal Fuse ø5x20 0 3A 250V Fast 4 Maximum Display is 1999 and updates two or three times every second 5 Over range display is 1 or OL Only UT30F 6...

Page 7: ...000m Storage 10000m 8 Relative humidity Max relative humidity 80 for temperature up to 31 o C decreasing linearly to 50 relative humidity at 40 o C 9 Battery 9V NEDA 1604 or 6F22 or 006P 10 Low Battery Indication Display on LCD 11 Dimension 75mmx130mmx36mm 12 Weight approx 150g Test Leads not included 7 Model UT30B C D F OPERATING MANUAL ...

Page 8: ...dity 75 Input Impedance 10MΩ for all the ranges Overload protection At 200mV range it s protected at 230V AC DC Current others are protected at 500V AC or DC Range Resolution Accuracy 200mV 2000mV 2V 20V 200V 500V 100µV 1mV 10mV 100mV 1V UT30B UT30C UT30D UT30F 0 5 2 0 8 2 1 DC Voltage 8 Model UT30B C D F OPERATING MANUAL ...

Page 9: ...400Hz Display RMS of Sine Wave Value Average Value Overload protection At 200mV range it is protected at 230V AC DC Current others are protected at 500V AC or DC Range Resolution Accuracy 200mV 2V 20V 200V 500V 100µV 1mV 10mV 100mV 1V UT30B UT30C UT30D UT30F 1 2 10 1 2 3 1 2 3 1 3 9 Model UT30B C D F OPERATING MANUAL ...

Page 10: ...0mA UT30B UT30C UT30D UT30F 1 2 2 2 5 1 2 Overload Protection 0 3A 250V fuse No fuse at 10A measuring time limit is equal to or less than 10 seconds and time interval should be equal to or over 15 minutes Measuring voltage drop Full range is 200m V 3 DC Current 10 Model UT30B C D F OPERATING MANUAL ...

Page 11: ...use at 10A measuring time limit is equal to or less than 10 seconds time interval is equal to or over 15 minutes Frequency response 40Hz 400Hz Display RMS of Sine Wave Value Average Value Range Resolution Accuracy 1 8 3 200mA 10A 100µA 10mA 3 7 11 Model UT30B C D F OPERATING MANUAL ...

Page 12: ...stance Range Resolution Accuracy 200Ω 2000Ω 2kΩ 20kΩ 200kΩ 2MΩ 20MΩ 0 1Ω 1Ω 10Ω 100Ω 1kΩ 10kΩ UT30B UT30C UT30D UT30F 0 8 5 1 5 0 8 2 Overload Protection All ranges are 230V DC AC current 12 Model UT30B C D F OPERATING MANUAL ...

Page 13: ...E Specification 6 6 Temperature Only UT30C Range Resolution Accuracy 1 3 40 o C 150 o C 150 o C 1000 o C 1 5 15 1 o C 1 o C 13 Model UT30B C D F OPERATING MANUAL ...

Page 14: ... 10MHz 1V MAX input scope 10V 7 Frequency Only UT30F Auto Range Range Resolution Accuracy 0 1 3 2kHz 10MHz 1Hz 10kHz 8 Square Wave Output Only UT30D Range Illustration OUT Output approx at 50Hz Square Wave As a simple signal source with 100kΩ resistance output 14 Model UT30B C D F OPERATING MANUAL ...

Page 15: ... is less than 10V to avoid damages to the Meter 9 Diode Transistor Continuity Beeper Test Function Range Resolution 30B 30C 30D 30F Remark Transistor Continuity Beeper Test hFE 1β 1Ω Display voltage drop approximation Diode Ibo 10µA Vce 3V 1mV others 70Ω Buzzer sound 15 Model UT30B C D F OPERATING MANUAL ...

Page 16: ...pt UT30F AC DC exchange 3 Rotary Switch 4 Transistor Test Jack 5 Common Input Jack 6 10A Input Jack 7 Input Jack for General Measurement If the model has backlight function as UT30BL UT30CL UT30DL press the button abidingly over 3 seconds backlight will be opened it will shut off automatically after 20 seconds late figure 1 16 Model UT30B C D F OPERATING MANUAL ...

Page 17: ...position When the battery is low will appear on LCD Second the symbol beside the input jack warns you when testing current and voltage Input values must not exceed the limit 1 DC Voltage Measurement see figure 2 figure 2 17 Model UT30B C D F OPERATING MANUAL ...

Page 18: ...hen according to reading requirement adjust to a lower range until satisfactory reading is obtained 3 If 1 or OL is shown on LCD set to the higher range because the selected range is overloaded 4 At every range input impedance is 10MΩ This can cause measuring tolerance at high impedance If circuit impedance is equal to or less than 10kΩ you can ignore the tolerance 0 1 or lower G Make Measurements...

Page 19: ...G Make Measurements 3 2 AC Voltage Measurement see figure 3 Same as DC voltage measurement figure 3 19 Model UT30B C D F OPERATING MANUAL ...

Page 20: ...not measure when value between open voltage and earth is exceeding safety voltage 60V because it may cause damages to the measuring object or instrument and also hurt the user figure 4 G Make Measurements 4 20 Model UT30B C D F OPERATING MANUAL ...

Page 21: ... a lower range until a satisfactory reading is obtained 4 If the meter is overloaded on mA input jack the fuse will melt up In this case replace with a new fuse with same specification 5 The dimension of fuse is ø5x20 mm and the specification is F 0 3A 250V FAST 6 For 10A input jack it is non fused For safety each measuring time should be equal to or less than 10 seconds Time intervals should be e...

Page 22: ...Same as DC current measurement G Make Measurements 6 figure 5 4 AC Current Measurement Only for UT30F see figure 5 22 Model UT30B C D F OPERATING MANUAL ...

Page 23: ...f the object and make sure there is no charge in capacitor 2 Test lead wires take 0 1Ω 0 3Ω tolerance when measuring resistance To get an accurate reading subtract the short circuit values of the 2 test leads 3 It will take several seconds for the display to become stabilized when resistance value is over 1MΩ 23 Model UT30B C D F OPERATING MANUAL ...

Page 24: ... charge in capacitor 2 When measuring voltage drop of diode transistor and other semiconductor component at diode function its silicon semiconductor structure should be normal positive reading and stay between 0 5V and 0 8V Negative display being 1 means open circuit when the red test lead is positive pole and the black one is negative pole 24 Model UT30B C D F OPERATING MANUAL ...

Page 25: ...ent see figure 8 1 Check that the transistor is PNP or NPN type 2 Connect the transistor to be measured to the corresponding jacks 3 LCD display hFE reference value 4 Measuring condition Ibo 10µA Vce 3V figure 8 25 Model UT30B C D F OPERATING MANUAL ...

Page 26: ...ocket Red lead of temp probe into o C socket LCD displays the measuring value with unit in o C 2 The temperature probe limits to below 250 o C For a higher degree of temperature measurement use another hand held thermocouple P N 41700107 The LCD display room temperature when unloading the probe figure9 26 Model UT30B C D F OPERATING MANUAL ...

Page 27: ...To avoid damages to the meter do not let output terminal reach higher then 10V voltage 2 The frequency is 50Hz 3 The output voltage range will be over 3V when it is loaded 1MΩ 4 Use square wave output to repair audio equipment figure10 27 Model UT30B C D F OPERATING MANUAL ...

Page 28: ...he meter 2 The LCD will display reading when the measured frequency is more than 10V but the read out may exceed specification To obtain an accurate stable reading an external attenuator should be used 3 To measure high frequency signal in high interferenced environment use shielded cable figure11 28 Model UT30B C D F OPERATING MANUAL ...

Page 29: ...he bottom case 3 Separate the bottom case from the top case 4 Replace the battery or fuse with in user s manual specification 5 Rejoin the bottom case and top case and reinstall two screws and two rubber feet H Fuse and battery replacement see figure 12 figure12 Fuse and battery replacement 29 Model UT30B C D F OPERATING MANUAL ...

Page 30: ... END This operating manual is subject to change without notice I Accessories 1 Operating manual 2 Test leads 3 Thermocouple Only for UT30C 30 Model UT30B C D F OPERATING MANUAL ...

Page 31: ...31 Model UT30B C D F OPERATING MANUAL ...

Page 32: ... rights reserved Manufacturer Uni Trend International Limited Rm901 9 F Nanyang Plaza 57 Hung To Road Kwun Tong Kowloon Hong Kong Tel 852 2950 9168 Fax 852 2950 9303 Email info uni trend com http www uni trend com 32 Model UT30B C D F OPERATING MANUAL ...

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