UNI-T UT61A Operating Manual Download Page 2

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Title

Page

I.Transistor hFE Measurement
J.EF Function
Operation of Hold Mode

RANGE

Button

MAX MIN

Button

PEAK

Button

Data Outputting
The Use of Relative Value Mode
The

BLUE

Button

Turning on the Display Backlight
Sleep Mode
General Specifications
Accuracy Specifications
A.DC Voltage
B.AC Voltage
C.DC Current
D.AC Current
E.Resistance

Model UT61A/61B/61C/61D/61E: OPERATING MANUAL

Summary of Contents for UT61A

Page 1: ...tional Electrical Symbols The Meter Structure Rotary Switch Functional Buttons Display Symbols Measurement Operation A DC AC Voltage Measurement B DC AC Current Measurement C Measuring Resistance D Testing for Continuity E Testing Diodes F Capacitance Measurement G Frequency Measurement H Temperature Measurement Model UT61A 61B 61C 61D 61E OPERATING MANUAL 1 ...

Page 2: ... of Hold Mode RANGE Button MAX MIN Button PEAK Button Data Outputting The Use of Relative Value Mode The BLUE Button Turning on the Display Backlight Sleep Mode General Specifications Accuracy Specifications A DC Voltage B AC Voltage C DC Current D AC Current E Resistance Model UT61A 61B 61C 61D 61E OPERATING MANUAL 2 ...

Page 3: ... 67 F Capacitance G Frequency H Diode Test I Continuity Test J Temperature K Transistor hFE Maintenance A General Service B Replacing the Battery C Replacing the Fuses USB and RS232C Serial Port Model UT61A 61B 61C 61D 61E OPERATING MANUAL 3 ...

Page 4: ...perating Manual covers information on safety and cautions Please read the relevant information carefully and observe all the Warnings and Notes strictly Warning Model UT61A 61B 61C 61D 61E OPERATING MANUAL 4 ...

Page 5: ...t Lead Point Contact K type Temperature Probe UT61B and UT61C only UT61 Multi Purpose Socket 9V Battery NEDA1604 6F22 or 0006P installed inside the Meter RS232C Interface Cable except UT61A USB Interface Cable Optional at extra cost except UT61A Installation Guide Computer Interface Software CD ROM Come along with the RS232C or USB Interface Cable except UT61A Item 1 2 3 4 5 6 7 8 Qty 1 piece 1 pa...

Page 6: ...AT IV Primary supply level overhead lines cable systems etc Use the Meter only as specified in this operating manual otherwise the protection provided by the Meter may be impaired In this manual a Warning identifies conditions and actions that pose hazards to the user or may damage the Meter or the equipment under test A Note identifies the information that user should pay attention on Internation...

Page 7: ... or exposed metal Check the test leads for continuity Replace damaged test leads with identical model number or electrical specifications before using the Meter l Do not apply more than the rated voltage as marked on the Meter between the terminals or between any terminal and grounding l The rotary switch should be placed in the right position and no any changeover of range shall be made during me...

Page 8: ...it reliably turn the current to be tested on l Replace the battery as soon as the battery indicator appears With a low battery the Meter might produce false readings that can lead to electric shock and personal injury l When servicing the Meter use only the same model number or identical electrical specifications replacement parts l The internal circuit of the Meter shall not be altered at will to...

Page 9: ...hen it has been using for some time replace the battery as soon as leaking appears A leaking battery will damage the Meter International Electrical Symbols AC or DC Double Insulated Warning Refer to the Operating Manual Grounding Deficiency of Built In Battery Conforms to Standards of European Union Model UT61A 61B 61C 61D 61E OPERATING MANUAL 9 ...

Page 10: ...The Meter Structure see figure 1 LCD Display Functional Buttons Blue button Rotary Switch Input Terminal figure 1 1 2 3 4 5 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 10 ...

Page 11: ... only Resistance Measurement Diode Test Continuity Test Capacitance Test Frequency and Duty Cycle Test Temperature in Celsius UT61B and UT61C only Temperature in Fahrenheit UT61B and UT61C only Transistor UT61A only DCA and ACA Measurement DCmA and ACmA Measurement 10A DC and AC Measurement Sensor Test UT61A only Power off OFF mV Model UT61A 61B 61C 61D 61E OPERATING MANUAL 11 ...

Page 12: ...RANGE to enter the manual ranging mode the Meter beeps Press RANGE to step through the ranges available for the selected function the Meter beeps Press and hold RANGE for 2 seconds to return to autoranging the Meter beeps Press again to exit REL mode For Model UT61C UT61C and Press and hold for over 2 seconds to enter or exit RS232C or USB mode Press to enter REL mode Button Hold BLUE Button RANGE...

Page 13: ...anging mode The input value is too large for the selected range Transistor testing indicator Test of diode The continuity buzzer is on Maximum and Minimum reading Data output is in progress The battery is low Warning To avoid false readings which could lead to possible electric shock or personal injury replace the battery as soon as the battery indicator appears Sensor test is in progress No 1 2 3...

Page 14: ...p 1 x 10 3 or 0 001 amperes µA Microamp 1x 10 6 or 0 000001 amperes F Farad The unit of capacitance µF Microfarad 1 x 10 6 or 0 000001 farads nF Nanofarad 1 x 10 9 or 0 000000001 farads Centigrade The unit of temperature Fahrenheit The unit of temperature Hz Hertz The unit of frequency in cycles second kHz Kilohertz 1 x 103 or 1 000 hertz MHz Megahertz 1 x 106 or1 000 000 hertz The unit of transis...

Page 15: ...Measurement Operation A DC AC Voltage Measurement See figure 2 figure 2 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 15 ...

Page 16: ... to V DC measurement is default or press BLUE button to switch between DC and AC measurement mode 3 Connect the test leads across with the object being measured The measured value shows on the display UT61A UT61B and UT61C display effective value of sine wave mean value response UT61D and UT61E display true rms value 4 Press Hz to obtain the frequency and duty cycle value Input Amplitude DC electr...

Page 17: ...edance is less than or equal to 10k the error is negligible 0 1 or less l For UT61A and UT61B When measuring mV you must press RANGE manually to enter mV range l When voltage measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove the testing leads away from the input terminals of the Meter Model UT61A 61B 61C 61D 61E OPERATING MANUA...

Page 18: ...B DC AC Current Measurement See figure 3 figure 3 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 18 ...

Page 19: ... current terminals do not parallel them across any circuit To measure current do the following 1 Insert the red test lead into the mA or A input terminal and the black test lead into the COM terminal 2 Set the rotary switch to A mA or A 3 The Meter defaults to DC current measurement mode To toggle between DC and AC current measurement function press BLUE button 4 Connect the test lead in serial to...

Page 20: ... measured is unknown use the maximum measurement position and reduce the range step by step until a satisfactory reading is obtained l For safety sake each measurement time for 5A current should be less than 10 seconds and the interval time between 2 measurements should be greater than 15 minutes l When current measurement has been completed disconnect the connection between the testing leads and ...

Page 21: ...C Measuring Resistance See figure 4 figure 4 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 21 ...

Page 22: ...llows 1 Insert the red test lead into the terminal and the black test lead into the COM terminal 2 Set the rotary switch to resistance measurement is default or press BLUE button to select measurement mode 3 Connect the test leads across with the object being measured If there is lead on the resistor or SMT resistor it is more convenience to use the included multi purpose socket to carry out testi...

Page 23: ...Model UT61A 61B 61C 61D 61E OPERATING MANUAL 23 ...

Page 24: ...D Testing for Continuity See figure 5 figure 5 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 24 ...

Page 25: ...COM terminal 2 Set the rotary switch to and press BLUE button to select measurement mode 3 The buzzer sounds continuously if the resistor to be tested is 10 The buzzer does not sound if the resistor to be tested is 35 Note l UT61A UT61B UT61C and UT61D open circuit voltage is around 0 45V UT61E open circuit voltage is around 1 2V l When continuity testing has been completed disconnect the connecti...

Page 26: ...E Testing Diodes See figure 6 figure 6 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 26 ...

Page 27: ...Model UT61A 61B 61C 61D 61E OPERATING MANUAL 27 ...

Page 28: ...s open or polarity is reversed The unit of diode is Volt V displaying the forward voltage drop readings l When diode testing has been completed disconnect the connection between the testing leads and the circuit under test and remove the testing leads away from the input terminals of the Meter Model UT61A 61B 61C 61D 61E OPERATING MANUAL 28 ...

Page 29: ...F Capacitance Measurement See figure 7 figure 7 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 29 ...

Page 30: ...lue as below which is the Meter internal fixed distributed capacitance value To ensure accuracy when measuring a small value of capacitance the tested value must subtract this value REL mode can help on that UT61A UT61B UT61C UT61D and UT61E around 10nF UT61E around 50PF l For more convenience use the included multi purpose socket for measuring capacitor with leads or SMT capacitor Insert the capa...

Page 31: ...figure 8 n the tested capacitor is more than 100uF Model UT61A 61B 61C 61D 61E OPERATING MANUAL 31 ...

Page 32: ...00 For UT61E Measuring Audio frequency if the input voltage is more than 15 volt the meter will simulate the sound in same frequency 40MHz unspecified 4 4 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 32 ...

Page 33: ...t the connection between the testing leads and the circuit under test and remove the testing leads away from the input terminals of the Meter H Temperature Measurement UT61B and UT61C only See figure 9 figure 9 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 33 ...

Page 34: ...sured After few seconds the measured value shows on the display 4 Press BLUE button to toggle between and temperature Note l To avoid measurement error especially low temperature measurement the operating temperature must not exceed 18 28 l When temperature measurement has been completed disconnect the connection between the temperature probe and the object being measured and remove the temperatur...

Page 35: ...I Transistor hFE Measurement UT61A only See figure 10 figure 10 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 35 ...

Page 36: ...0 3 Insert the transistor to be tested into the corresponding multi purpose socket jacks 4 The LCD display hFE nearest value Note l When transistor measurement has been completed disconnect all the connection between multi purpose socket transistor and the Meter Model UT61A 61B 61C 61D 61E OPERATING MANUAL 36 ...

Page 37: ...J EF Function UT61A only See figure 11 figure 11 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 37 ...

Page 38: ... of detected signal ÿ When the LCD displays OL the buzzer beeps and the red LED blinks Operation of Hold Mode Warning To avoid possibility of electric shock do not use Hold mode to determine if circuits are without power The Hold mode will not capture unstable or noisy readings The Hold mode is applicable to all measurement functions l Press HOLD to enter Hold mode the Meter beeps l Press HOLD aga...

Page 39: ...ode after pressing MAX MIN button l Press and hold MAX MIN for over 2 seconds to exit MAX MIN mode and return to the present measurement range PEAK Hold UT61E only l Under voltage and current measurement mode press PEAK button to enter manual ranging mode and start recording of Pmax and Pmin values The LCD displays MANU Pmax l Press PEAK again to display MANU Pmin l Press PEAK to step the display ...

Page 40: ...For UT61E Auto entering Data outputting mode Model UT61A 61B 61C 61D 61E OPERATING MANUAL 40 ...

Page 41: ...Model UT61A 61B 61C 61D 61E OPERATING MANUAL 41 ...

Page 42: ... 6x25mm l Display UT61A and UT61B Maximum reading 4000 frequency 9999 analogue bar graph 41 segments UT61C and UT61D Maximum reading 6000 frequency 9999 analogue bar graph 61 segments UT61E Maximum reading 22000 analogue bar graph 46 segments l Measurement Speed Updates 2 3 times second l Range Auto or Manual l Polarity Display Auto l Overload indication Display OL l Battery Deficiency Display Mod...

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Page 57: ...4 4 4 4 4 4 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 57 ...

Page 58: ...Model UT61A 61B 61C 61D 61E OPERATING MANUAL 58 ...

Page 59: ...300 40 400 40M 0 01Hz 0 001Hz Model UT61A 61B 61C 61D 61E OPERATING MANUAL 59 ...

Page 60: ...0 001V 0 0001V Model UT61A 61B 61C 61D 61E OPERATING MANUAL 60 ...

Page 61: ...Vac Model UT61A 61B 61C 61D 61E OPERATING MANUAL 61 ...

Page 62: ...tion To avoid electrical shock or damage to the Meter do not get water inside the case A General Service l Periodically wipe the case with a damp cloth and mild detergent Do not use abrasives or solvents l To clean the terminals with cotton bar with detergent as dirt or moisture in the terminals can affect readings l Turn off the power of the Meter when it is not in use l Take out the battery when...

Page 63: ...l Do not use or store the Meter in a place of humidity high temperature explosive inflammable and strong magnetic field B Replacing the Battery figure 12 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 63 ...

Page 64: ...tery See figure 12 1 Turn the Meter power off and remove all connections from the terminals 2 Remove the screw from the tilt stand and the battery compartment and separate the battery compartment and the tilt stand from the case bottom 3 Remove the battery from the battery compartment 4 Replace the battery with a new 9V battery NEDA1604 6F22 or 006P 5 Rejoin the tilt stand battery compartment and ...

Page 65: ...C Replacing the Fuses figure 13 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 65 ...

Page 66: ...e battery compartment and separate the battery compartment and the tilt stand from the case bottom 3 Remove the two screws from the case bottom and separate the case top from the case bottom 4 Remove the fuse by gently prying one end loose then take out the fuse from its bracket 5 Install ONLY replacement fuses with the identical type and specification as follows and make sure the fuse is fixed fi...

Page 67: ...and UT61E only It is optional at extra cost Please refer to the ìInstallation Guide Computer Interface Softwareî for installing and operating instructions of the UT61 Interface Program END Model UT61A 61B 61C 61D 61E OPERATING MANUAL 67 ...

Page 68: ...ogy Dongguan Limited Dong Fang Da Dao Bei Shan Dong Fang Industrial Development District Hu Men Town Dongguan City Guang Dong Province China Postal Code 523 925 Headquarters Uni Trend Group Limited Rm901 9 F Nanyang Plaza 57 Hung To Road Kwun Tong Kowloon Hong Kong Tel 852 2950 9168 Fax 852 2950 9303 Model UT61A 61B 61C 61D 61E OPERATING MANUAL 68 ...

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