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To measure AC voltage, connect the Meter as follows:
1.

2.

Model UT805: OPERATING MANUAL

ACV

COM

RL

B. AC Voltage Measurement

(See figure 5)

Warning
To avoid harms to you or damages to the Meter from
electric shock, please do not attempt to measure
voltages higher than 1000V or 750V rms although
readings may be obtained.
Take extra care when measuring high voltage to avoid
electric shock.

Insert the red test lead into the

V/

terminal and the

black test lead into the

COM

terminal.

Press

ACV

button, the Meter is ready for

measurement after around 8 seconds. Auto ranging
is default, the Meter will select the appropriate range,
and an annunciator on the display will indicate
measurement unit. Or you could select the manual
ranging mode according to the “

Selecting a

Measurement Range

( , AUTO and Button)

”

section.

(figure 5)

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Содержание UT805

Страница 1: ...Model UT805 OPERATING MANUAL ...

Страница 2: ......

Страница 3: ...nel B Rear Panel Functional Buttons Display Symbols Measurement Operation A DC Voltage Measurement B AC Voltage Measurement C DC or AC Current Measurement D Measuring Resistance E Testing Diodes F Testing for Continuity G Capacitance Measurement H Frequency Measurement Selecting a Measurement Range AUTO and Button The Use of Relative Value Mode MAX MIN Mode The Use of STO and RCL Button Operation ...

Страница 4: ...e C DC Current D AC Current E Resistance F AC Voltage with DC deviation AC DC G AC Current with DC deviation AC DC Summary of error codes Maintenance A General Service B Replacing the Fuses RS232C and USB Serial Port System Requirements for Installing the UT805 Interface Program RS232C Serial Port A Connecting between the Meter and computer B RS232C Port Cable C Setting of RS232C Serial Ports USB ...

Страница 5: ...echnology with 24 counts A D converter as a core highly precise amplifier True RMS s AC converter and full electronic calibration technique to make it as a reliable and accurate Multimeter In addition to all the conventional features including DC AC voltage current resistance diode continuity test capacitance frequency there is a recall function RS232C and USB standard serial port for easy connect...

Страница 6: ...ing or damaged part In the event you find any missing or damage please contact your dealer immediately 1 2 3 4 5 6 7 8 Operating Manual Test Lead Alligator Clip Multi Purpose Socket Line Cord AC220V 50Hz 15W or AC110V 50Hz 15W RS232C Interface Cable USB Interface Cable Installation Guide Computer Interface Software CD ROM 1 piece 1 pair 1 pair 1 piece 1 piece 1 piece 1 piece 1 piece ...

Страница 7: ...trical symbols used on the Meter and in this Operating Manual are explained on page 7 Rules For Safe Operation Warning To avoid possible electric shock or personal injury and to avoid possible damage to the Meter or to the equipment under test adhere to the following rules Before using the Meter inspect the case Do not use the Meter if it is damaged or the case or part of the case is removed Look ...

Страница 8: ...orate after dampened When using the test leads keep your fingers behind the finger guards l l l l l l Disconnect circuit power and discharge all high voltage capacitors before testing on line resistance continuity diodes current or capacitance Before measuring current check the Meter s fuses and turn off power to the circuit before connecting the Meter to the circuit Remove test leads RS232C inter...

Страница 9: ...ERATING MANUAL International Electrical Symbols AC or DC Grounding Double Insulated Warning Refer to the Operating Manual High Voltage Continuity Test Diode Capacitance Test Fuse Conforms to Standards of European Union ...

Страница 10: ... voltage and resistance measurement inserting the red test lead 200mA MAX Input Terminal Positive input terminal for mA measurement inserting the red test lead 6 10A MAX Input Terminal Positive input terminal for A measurement inserting the red test lead Input Terminal Positive input terminal for capacitance frequency diode and continuity measurement inserting the red test lead 2mA and 200mA Butto...

Страница 11: ...Model UT805 OPERATING MANUAL CAL Button Calibrate the accuracy of Voltage Current and Resistance Secondary Functional Buttons Different side functions selection RANGE Button AUTO and Select Auto or Manual ranging ...

Страница 12: ...ck test lead HI Input Terminal 4 wire configuration to measure resistance high current terminal inserting red test lead LO Input Terminal 4 wire configuration to measure resistance low current terminal inserting black test lead Power The on off switch of AC220V 50Hz 15W or AC110V 50Hz 15W power supplier I means power up while O means power off Power Line Cord Connector Plug the AC220V 50Hz 15W or ...

Страница 13: ...ging step through the ranges when the Meter is at manual ranging measurement mode Continuity Test Diode Test Frequency Test Capacitance Test Resistance Measurement AC Voltage Measurement displaying True RMS value DC Voltage Measurement AC Current Measurement displaying True RMS value Operation Performed l Press to enter resistance measurement mode Use the front input terminals for 2 wire measureme...

Страница 14: ... measurement range Press 200mA down to select 200mA current measurement range Press both 2mA and 200mA down is a mis operation the Meter displays Err 1 When both 2mA and 200mA are not pressed down 10A range is default when measuring current l l l l l lt can only be used at AC Voltage or AC Current measurement mode otherwise the Meter displays Err1 then back to the previous measurement range l Pres...

Страница 15: ... Data Holding 2 Exit STO RCL and MAX MIN mode Operation Performed l l Press STO to store the reading Press RCL to recall the stored reading Press HOLD to enter Hold mode the VFD display Press HOLD again to exit Hold mode the disappear l l l Press HOLD to exit STO RCL and MAX MIN mode when the Meter is at STO RCL and MAX MIN measurement mode ...

Страница 16: ...14 Model UT805 OPERATING MANUAL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 STO RCL AUTO HOLD AC DC TrueRMS MAX MIN AVG S mS kHz mVAnF MK WHz Display Symbols see figure 3 µ µ figure 3 ...

Страница 17: ... AC Voltage or Current with DC deviation measurement Indicator for True RMS value of AC measurement Display of maximum value Display of minimum value Display of average value Test of diode Secondary Display The unit of frequency in cycles second µS Microsecond mS Millisecond AC AC DC True RMS MAX MIN AVG Smaller digits µS mS 1 2 3 4 5 6 7 8 9 10 11 HOLD ...

Страница 18: ... k M The unit of frequency of AC measurement Kilohertz shown in the secondary display The unit of capacitance nF Nanofarad µF Microfarad mF Millifarad A Amperes amps The unit of current mA Milliamp V Volts The unit of voltage mV Millivolt Ohm The unit of resistance k kilohm M Megaohm ...

Страница 19: ...Number Symbol Meaning 14 15 16 17 18 19 20 Relative mode is on The continuity buzzer is on Primary Display Indicates negative reading Reading storage is on Reading recalling is on Auto ranging mode indicator Larger digits STO RCL AUTO ...

Страница 20: ...er from electric shock please do not attempt to measure voltages higher than 1000V or 750V rms although readings may be obtained Insert the red test lead into the V terminal and the black test lead into the COM terminal Press the DCV button Auto ranging is default the Meter will select the appropriate range and an annunciator on the display will indicate measurement units Or you could select the m...

Страница 21: ... 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 l l Connect the test leads across with the object being measured as shown in figure 4 The measured value shows on the primary display and the secondary display shows the measuring range The sampling rate is around 2 times per sec...

Страница 22: ...y be obtained Take extra care when measuring high voltage to avoid electric shock Insert the red test lead into the V terminal and the black test lead into the COM terminal Press ACV button the Meter is ready for measurement after around 8 seconds Auto ranging is default the Meter will select the appropriate range and an annunciator on the display will indicate measurement unit Or you could select...

Страница 23: ...st leads across with the object being measured as shown in figure 5 The primary display shows the True RMS AC value the effective reading is only applicable to the range of 10 100 The measured signal frequency value shows on the secondary display The sampling rate is around 1 time per second To measure AC signal with DC deviation first press ACV button then press AC DC button Otherwise the primary...

Страница 24: ...rement When the testing leads are connected to the current terminals do not parallel them across any circuit ACI or DCI measurement do not have auto ranging measurement mode Press ACI or DCI button only to select 10A measurement range Insert the red test lead into the 10A MAX terminal and black test lead into the COM terminal OR Press ACI or DCI button then press 2mA button to select 2mA measureme...

Страница 25: ...ing When current 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 l l l l Press ACI or DCI button then press 200mA button to select 200mA measurement range Insert the red test lead into the 200mA MAX terminal and black test lead into the COM terminal It is invalid to...

Страница 26: ...tance Insert the red test lead into the V terminal and the black test lead into the COM terminal at the front panel Press the button to enter resistance measurement mode Auto ranging is default the Meter will select the appropriate range and an annunciator on the display will indicate measurement units Or you could select the manual ranging mode according to the Selecting a Measurement Range AUTO ...

Страница 27: ...lows see figure 8 Use 2 sets of test lead and insert them into the rear panel of the Meter Insert two red test leads into the two red terminals at the rear panel Insert two black test leads into the two black terminals at the rear panel Short circuit the four test laads and press REL to display 0 Connect the test leads across with the object The measured value shows on the primary display and the ...

Страница 28: ...ter test lead to carrying out measurement The LCD displays OL indicating open circuit for the tested resistor or the resistor value is higher than the maximum range of the Meter When resistance 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 l l l ...

Страница 29: ...e diode test to check diodes transistors and other semiconductor devices The diode test sends a current through the semiconductor junction and then measures the voltage drop across the junction A good silicon junction drops between 0 5V and 0 8V To test a diode out of a circuit connect the Meter as follows Insert the red test lead into terminal and the black test lead into the COM terminal Press b...

Страница 30: ...roper terminals as said above to avoid error display The primary display shows OL indicating diode being tested is open or polarity is reversed The unit of diode is Volt V displaying the forward voltage drop readings Open circuit voltage is around 2 8V When diode testing has been completed disconnect the connection between the testing leads and the circuit under test and remove the testing leads a...

Страница 31: ...To avoid harms to you please do not attempt to input voltages higher than 60V DC or 30V AC Insert the red test lead into the terminal and the black test lead into the COM terminal Press button to enter continuity measurement mode Connect the test lead across with the object being measured The buzzer sounds if the resistance of a circuit under test is 25 the circuit is in good condition The primary...

Страница 32: ...2V The primary display shows OL indicating the tested circuit is open When continuity 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 l l l ...

Страница 33: ...d To avoid harms to you please do not attempt to input voltages higher than 60V DC or 30V AC Insert the red test lead into the terminal and the black test lead into the COM terminal Press button to select capacitance measurement mode Auto ranging is default Connect the test lead across with the object being measured For the capacitor lead is less than 0 6mm It is recommended to use the multi purpo...

Страница 34: ...e desired range button cannot be used It is normal to take a longer time when testing a capacitor value higher than 10 F The Meter display shows OL indicating the tested capacitor is shorted or it exceeds the maximum range When capacitance 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 t...

Страница 35: ...ure frequency connect the Meter as follows Insert the red test lead into the terminal and the black test lead into the COM terminal Press Hz button to select frequency measurement mode Auto ranging is default Connect the test leads across with the object being measured The measured value shows on the primary display and the secondary display shows the cycle of the tested frequency figure 12 ...

Страница 36: ...300mV a 30V rms When 10Mz 50MHz 600mV a 30V rms When 50Mz Unspecified In the manual range mode press to up range or down range to the desired range button cannot be used When frequency 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 l l l ...

Страница 37: ...UTO to toggle back to autoranging At resistance measurement mode Auto ranging measurement mode is default Press AUTO to toggle in and out of the manual l l l l ranging mode or press or to toggle in the manual ranging mode In the manual range mode press or to up range or down range to the desired range At ACV and DCV measurement mode Auto ranging measurement mode is default Press AUTO to toggle in ...

Страница 38: ... the primary display The secondary display is unaffected Selecting the relative mode turns off autoranging and locks in the present range Make sure you are in the correct range before selecting the relative mode If you press or after the relative mode has been selected you will automatically exit Press REL to enter REL mode the Meter displays auto ranging turns off and the present meauremnet range...

Страница 39: ...s Press MAX MIN again to display the minimum reading and the MIN annunciator lights Each subsequent press of the MAX MIN button toggles between the maximum and minimum measurements taken To exit MAX MIN mode press HOLD button Selecting the MAX MIN mode turns off autoranging and locks in the present range Make sure you are in the correct range before selecting the MAX MIN mode If you press or after...

Страница 40: ... stored reading is 100 RCL will be flicking on the VFD when the stored value is over 100pcs You need then need to recall the reading Press HOLD to exit STO mode l l l l Follow the following procedure to recall the stored reading 1 Press HOLD to exit STO mode 2 Press RCL to step through MAX reading MIN reading AVG reading the first stored reading n 00 the second stored reading n 02 until the 100st ...

Страница 41: ...isplay is hold To exit hold mode press HOLD again will be disappeared You can also press HOLD to exit STO RCL and MAX MIN mode when the Meter is at STO RCL and MAX MIN measurement mode General Specifications Maximum Voltage between any Terminals and Grounding Refer to different range input protection voltage Fused Protection for 200mA Input Terminal 315mA 250V fast type 5x20mm Fused Protection for...

Страница 42: ...040 F Storage 100 C to 500 C 140 F to 1220 F Relative Humidity 75 00 C 300 C below 50 300 C 400 C Altitude Operating 2000 m Storage 10000 m l l l l l l Power AC220V 50Hz 15W or AC110V 50Hz 15W Dimensions HxWxL 240 x 105 x 370 mm Weight Approximate 2 9kg accessories 0 4kg l l l Safety Compliances IEC61010 CAT I 1000V CAT II 600V overvoltage and double insulation standard Certifications UL pending l...

Страница 43: ...e At 200mV and 2V ranges more than 500M At 20V 200V and 1000V ranges Around 10M l l Range Measurement Scope Resolution Accuracy 200mV 2V 20V 200V 1000V 1 V 220 000mV 10 V 2 20000V 100 V 22 0000V 1mV 220 000V 10mV 1000 00V 1 V 10 V 100 V 1mV 10mV In REL mode 0 006 2 0 007 2 Note UT805 multimeter is a precise digital multimeter when you turn on the UT805 allow a warm up period of at least 30 minutes...

Страница 44: ...ive reading is only applicable to the range of 10 100 The full range of each measurement range displays 220000 except at AC750V measurement range l l l l Range Resolution Accuracy 40Hz 10kHz 10 30kHz 30 50kHz 50 100kHz 0 5 300 2 500 N A N A 0 3 200 1 500 N A N A 0 2 200 0 3 200 1kHz 5kHz 0 4 100 0 1 100 0 2 100 40Hz 1kHz 0 3 100 1 V 10 V 100 V 1mV 10mV 200mV 2V 20V 200V 750V ...

Страница 45: ... At mA Range Fuse 315mA 250V fast type 5x20mm At A Range Fuse 10A 250V fast type 5x20mm At 5A range Continuous measurement is allowed At 5A range For continuous measurement 10 seconds and interval not less than 15 minutes l l l 2mA 20mA 10A 0 01 A 2 20000mA 1 A 220 000mA 0 1mA 10 0000A 0 01 A 1 A 0 1mA 0 03 10 0 8 60 ...

Страница 46: ... At 5A range Continuous measurement is allowed At 5A range For continuous measurement 10 seconds and interval not less than 15 minutes Displays The effective reading is only applicable to the range of 10 100 AC DC Tolerance Limit Same as AC 1 l l l l l Range Measurement Scope Resolution Accuracy 2mA 20mA 10A 0 01 A 2 20000mA 1 A 220 000mA 0 1mA 10 0000A 0 01 A 1 A 0 1mA 0 3 100 2 200 ...

Страница 47: ... Protection 1000V DC or 750V AC Open Circuit Voltage Around 2V l l Range Measurement Scope Resolution Accuracy 2k 20k 200k 2M 20M 0 01 2 20000k 0 1 22 0000k 1 220 000k 10 2 20000M 100 22 0000M 0 01 0 1 1 10 100 In REL mode 0 01 8 In REL mode 0 01 5 0 02 10 0 1 20 ...

Страница 48: ...ate 2 8V A good silicon junction drops between 0 5V and 0 8V l l Range Measurement Scope Resolution Overload Protection Remarks l l l G Continuity Test 0 600 250Vp 1 Open circuit voltage approximate 1 2V When circuit disconnected with resistance value 50 buzzer does not beep When circuit is in good connection with resistance value 10 buzzer beeps continuously ...

Страница 49: ...on 250Vp l Range Measurement Scope Resolution Accuracy 6nF 60nF 600nF 6 F 60 F 600 F 6mF 1pF 5 999nF 10pF 59 99nF 100pF 599 9nF 1nF 5 999 F 10nF 59 99 F 100nF 599 9 F 1 F 5 999mF 1pF 10pF 100pF 1nF 10nF 100nF 1 F In REL mode 2 5 5 In REL mode 2 0 5 2 0 5 5 0 5 Un Specified ...

Страница 50: ...d Protection 250Vp Input scope a DC electric level is zero When 10Hz 1MHz 150mV a 30V rms When 1MHz 10MHz 300mV a 30V rms When 10MHz 50MHz 600mV a 30V rms When 50MHz Unspecified 6kHz 60kHz 600kHz 6MHz 60MHz 1Hz 5 999kHz 10Hz 59 99kHz 100Hz 599 9kHz 1kHz 5 999MHz 10kHz 59 99MHz 1Hz 10Hz 100Hz 1kHz 10kHz 0 1 3 ...

Страница 51: ...00 00V calibration finished 1000V Short circuit the test lead press REL to display 0 input 190mV then press CAL button The Meter displays CAL HI END 190 000mV calibration finished Short circuit the test lead press REL to display 0 input 1 9V then press CAL button The Meter displays CAL HI END 1 90000V calibration finished 200mV 2V Short circuit the test lead press REL to display 0 input 19V then p...

Страница 52: ...ess CAL button to display CAL HI END 1 90000V calibration finished Input 1 9V press CAL button to display CAL LO END Input 19V press CAL button to display CAL HI END 19 0000V calibration finished Input 19V press CAL button to display CAL LO END Input 190V press CAL button to display CAL HI END 190 000V calibration finished 750V AC DC Input 190V press CAL button to display CAL LO END Input 750V pre...

Страница 53: ...ton to display CAL HI END 10 0000A calibration finished D AC Current Frequency 1kHz 2mA 200mA 10A AC DC Input 0 19mA Press CAL button to display CAL LO END Input 1 9mA Press CAL button to display CAL HI END 1 90000mA calibration finish Input 19mA Press CAL button to display CAL LO END Input 190mA Press CAL button to display CAL HI END 190 000mA calibration finish Input 1 9A Press CAL button to dis...

Страница 54: ...s REL to display 0 input 1 9k press CAL button to display CAL HI END 1 90000k calibration finished Press REL to display 0 input 19k press CAL button to display CAL HI END 19 0000k calibration finished Press REL to display 0 input 190k press CAL button to display CAL HI END 190 000k calibration finished Press REL to display 0 input 1 9M press CAL button to display CAL HI END 1 90000M calibration fi...

Страница 55: ...are listed in below table Error Code Description Wrong button is pressed At AVG mode the number of average times 999998 out of range At REL mode the stored value 220000 out of range The present measurement range and the range of the stored reading is not the same when recalling the reading The tested reading is out of the calibration scope Err1 Err2 Err3 Err4 ...

Страница 56: ...k or damage to the Meter do you get water inside the case A General Service l l l l l Calibrate the Meter around once a year to ensure the accuracy of each functions Periodically wipe the case with a damp cloth and mild detergent Do not use abrasives or solvents To clean the terminals with cotton bar with detergent as dirt or moisture in the terminals can affect readings Turn off the power of the ...

Страница 57: ...eries with the power supplier This fuse is located at the top of the power line cord connector on the rear panel To replace this fuse unplug the line cord and remove the line power fuse housing to install the replacement fuse Fuse 2 and 3 These two fuses are located inside the fuse compartment To replace these fuses first unplug the line cord Then use a coin to open the accessories compartment at ...

Страница 58: ... with the identical type and specification as follows and make sure the fuse is fixed firmly in the bracket Fuse 1 315mA 250V fast type 5x20mm AC220V Fuse 2 315mA 250V fast type 5x20 mm mA Fuse 3 10A 250V fast type 5x20 mm A Replacement of the fuses is seldom required Burning of a fuse always results from improper operation ...

Страница 59: ...nt computer with 80486 or higher processor and 600 x 800 pixel or better monitor Microsoft Windows 95 or above At least 8MB of RAM At least 8MB free space in hard drive Can access to a local or a network CD ROM A free serial port A mouse or other pointing device supported by Windows To use UT805 Interface Program you need the following hardware and software ...

Страница 60: ...2C Port Cable D sub 9 Pin Male Computer D sub 9 Pin Female D sub 25 Pin Female The Meter 2 RXD 3 TXD 5 SG 3 TXD 2 RXD 5 SG 2 TXD 3 RXD 7 SG C Setting of RS232C Serial Ports Default of RS232C serial port for communication is set as Baud Rate 19200 Start bit always 0 Stop bit always 1 Data bits 8 Parity Odd figure 14 ...

Страница 61: ...the meaning of each alphabet Number 1 2 3 4 5 Start Character S STO R RCL D STO RCL H HOLD X MAX N MIN G AVG C Continuity D Diode A AC AC DC E REL U AUTO 1 2 3 4 5 6 7 High Voltage C E Number 1 2 3 4 5 8 14 16 17 21 22 23 24 6 Digit dp 15 k M m n V A F 0 H Hz 4 Digit dp k kHz m mS S End Character CR 25 LF ...

Страница 62: ... below table When the Meter receives the computer sent command same large alphabet command twice it will return the same alphabet The Meter will not response if a wrong alphabet command is received Number 1 2 3 4 5 Command Meaning Number Command Meaning A DCI 10 J ACV B 11 K REL C 12 L HOLD D ACI 13 M E AC DC 14 N ...

Страница 63: ...tion Guide Computer Interface Software before connecting the Meter and computer Check for the USB Serial port shown at the Control Panel System Device Manager Make sure connect the Meter and the computer with the same port Please refer to the included Installation Guide Computer Interface Software for installing and operating instructions of the UT805 Interface Program END figure 15 TO COMPUTER ...

Страница 64: ...NI TREND TECHNOLOGY DONG GUAN LIMITED Address Dong Fang Da Dao Bei Shan Dong Fang Industrial Development District Hu Men Town Dong Guan City Guang Dong Province China Headquarters Uni Trend International Limited Address 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 C ...

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