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Uni-Trend UT803 multimeter

1. 44 G Diode Test gt E E 2 44 Capacitance MMMM 45 Frequency 46 J Temperature m 47 K Transistor _ _ _ _ _ _ 47 Maintenance 2 _ 48 A General Service 48 B Replacing the Fuses 80 C Replacing the Battery 51 RS232C and USB Serial Port _ _ 52 System Requirements for Installing the iig Interface Programi 52 RS232C Serial Port ER 53 A Connecting between the Meter did computer c 53 B RS232C Port Cable 54 C Setting of RS232C aerial dd en BA USB Serial Port AA 55 A Connecting between the Meter and computer E 55 B Setting of USB Serial Ports pou 55 Model UT803 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 A Warning To avoid electric shock or pers
2. 0 69 40Hz 1kHz 0 6 5 1000V gt 1kHz 10kHz 1 5 5 10kHz 20kHz 3 5 20kHz 100kHz 8 5 40Hz 1kHz 0 6 5 600V gt 1kHz 10kHz 3 5 5 40Hz 1kHz 1 2 3 1000V gt 1kHz 3kHz 3 3 39 Model UT803 OPERATING MANUAL Remarks Input Impedance At 600mV range Around gt 3000MQ At all other ranges Around 10MQ Displays gt True RMS applicable to the range of 1096 9596 gt At 1000V range AC peak factor 1 5 All other ranges AC peak factor 3 0 gt nput short circuit has around less than 30 remaining digits it will not affect accuracy gt AC DC measurement accuracy range s accuracy 1 40 Model UT803 OPERATING MANUAL C DC Current Range Resolution Accuracy Overload Protection 600HA 1 6000 1 0 5 3 Fuse 500mA 250V 60mA 0 01mA fast type 5 20 600mA 0 1mA 0 8 3 Fuse 10A 250V 10A 10mA 1 2 3 iastdype exbomim Remarks lt 5 range Continuous measurement is allowed At 55A range For continuous measurement lt 10 seconds and interval not less than 15 minutes 41 D AC Current Model UT803 OPERATING MANUAL Range Resolution Accuracy Overload Protection 600A 1 40 2 10 2 1 0 5 6000 Fuse 500mA 250 fast 10kHz 15kHz 2 5 60mA type 5x20mm 40Hz 10kHz 1 5 600mA 0 1mA gt 10kHz 15kHz 3 5 Fuse 10A 250V 10A 1
3. 24 Model UT803 OPERATING MANUAL Figure 7 Model UT803 OPERATING MANUAL To test a diode out of a circuit connect the Meter as follows 1 2 Insert the red test lead into terminal and the black test lead into the COM terminal Set the rotary switch to Q and press SELECT button to select gt measurement mode For forward voltage drop readings on any semiconductor component place the red test lead on the component s anode and place the black test lead on the component s cathode The measured value shows on the display Note Connect the test leads to the proper terminals as said above to avoid error display The LCD will display 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 7V 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 25 F Capacitance Measurement See figure 8 A Warning To avoid damage to the Meter or to the equipment under test disconnect circuit power and discharge all high voltage capacitors before measuring capacitance Use the DC Voltage function to confirm that the capacitor is discharged To measure capacitance connect the Meter as follows 1 Insert the red test lead into the HzQmV terminal and t
4. 26 G Frequency Measurement 28 H Temperature Measurement 30 Measuring Transistor 82 Operation of Hold Mode _ gt 33 The POWER Button A A O d 33 The SELECT Button z m E i a 2 2 33 Turning on the Display Backlight eg ge 34 The RANGE Button 34 The MAX MIN Button a m z x 3 R E 35 AC AC DC Button _ _ _ __ _ __ 35 Model UT803 OPERATING MANUAL TITLE PAGE POWER INPUT Switch 5 z gt 35 Sleep Mode _ _ _ _ a a 36 R5232 Button gt e y eese cg e 36 General Specifications 37 Accuracy Specifications _ _ _ _ _ _ __ __ _ 38 A DC Voltage 5 E S 38 B AC Voltage 39 C DC Current AE eee 41 D AC Current 42 E Resistance E 43 F Continuity Test
5. Figure 5 Model UT803 OPERATING MANUAL Note The test leads and the Meter inside wire will bring around 0 2Q to 0 5Q of error to resistance measurement when measuring low resistance To obtain accurate readings in low resistance short circuit the test lead beforehand and record the reading obtained call this reading as X Then use the equation measured resistance value Y X accurate readings of resistance If reading with shorted test leads is not 0 50 check for loose test leads incorrect function selection or any other reasons When measuring high resistance gt 1MQ it is normal to take several seconds to obtain a stable reading In order to obtain stable reading choose shorter 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 21 D Testing for Continuity See figure 6 A Warning To avoid damages to the Meter or to the devices under test disconnect circuit power and discharge all the high voltage capacitors before testing for continuity To avoid harms to you please do not attempt to input voltages higher than 60V DC or 30V AC To test for continuity connect the M
6. will see a fuse compartment Open the fuse compartment to replace fuse 2 and 3 Remove the fuse by gently prying one end loose then take out the fuse from its bracket Then install the replacement fuse Figure 12 49 Model UT803 OPERATING MANUAL Fuse 4 It is located at the PCB Remove the fuse by gently prying one end loose then take out the fuse from its bracket Then install the replacement fuse 3 Install ONLY replacement fuses with the identical type and specification as follows and make sure the fuse is fixed firmly in the bracket Fuse 1 200mA 250V fast type 65x20mm AC220V Fuse 2 10A 250V fast type 5x20 mm A Fuse 3 500mA 250V fast type 65x20 mm uA mA Fuse 4 200mA 250V fast type 65x20 mm hFE Replacement of the fuses is seldom required Burning of a fuse always results from improper operation 50 Model UT803 OPERATING MANUAL C Replacing the Battery see figure 13 AN Warning To avoid false readings which could lead to possible electric shock or personal injury replace the battery as soon as the battery indicator a3 appears when using battery to power on the Meter To replace the battery 1 2 3 Press the POWER to turn the Meter off and remove all connections from the terminals Use a coin to open the accessories compartment at the top of the front case Use a coin to open the battery compartment inside the accessories compartment located at the to
7. Cable 1 piece 9 Installation Guide amp Computer Interface Software CD ROM 1 piece In the event you find any missing or damage please contact your dealer immediately Model UT803 OPERATING MANUAL Safety Information This Meter complies with the standards IEC61010 in pollution degree 2 overvoltage category CAT 1000V CAT II 600V and double insulation CAT III Distribution level fixed installation with smaller transient overvoltages than CAT IV CAT 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 International electrical symbols used on the Meter and in this Operating Manual are explained on page 8 Rules For Safe Operation A 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 for cracks or missing plastic Pay attention to the insulation around the connectors Inspect the test leads for damaged insulation or
8. exposed metal Check the test leads for continuity Replace damaged test leads with identical model number or electrical specifications before using the Meter Do not apply more than the rated voltage as marked on the Meter between the terminals or between any terminal and grounding 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 Model UT803 OPERATING MANUAL When the Meter working at an effective voltage over 60V in DC or 30V rms in AC special care should be taken for there is danger of electric shock Use the proper terminals function and range for your measurements If the value to be measured is unknown use the maximum measurement position and reduce the range step by step until a satisfactory reading is obtained Do not use or store the Meter in an environment of high temperature humidity explosive inflammable and strong magnetic field The performance of the Meter may deteriorate after dampened When using the test leads keep your fingers behind the finger guards Disconnect circuit power and discharge all high voltage capacitors before testing 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 Model UT803 OPERATING MANUAL Replace the battery as soon as the ba
9. instruction A Warning Do not attempt to repair or service your Meter unless you are qualified to do so and have the relevant calibration performance test and service information To avoid electrical shock or damage to the Meter do you get water inside the case 48 Model UT803 OPERATING MANUAL A General Service 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 Meter when it is not in use Take out the battery when it is using for a long time Do not use or store the Meter in a place of humidity high temperature explosive inflammable and strong magnetic field Model UT803 OPERATING MANUAL B Replacing the Fuses see figure 12 A Warning To avoid electrical shock or arc blast or personal injury or damage to the Meter use specified fuses ONLY in accordance with the following procedure To replace the Meter s fuse 1 Press the POWER to turn the Meter off disconnect the power cord and remove all connections from the terminals 2 Fuse 1 Remove the screws from the power socket at the rear of the Meter Remove the fuse by gently prying one end loose then take out the fuse from its bracket Then install the replacement fuse Fuse 2 and 3 Use a coin to open the accessories compartment at the top of the front cover then you
10. 0mA 40Hz 5kHz 2 0 6 fast type 5x20mm Remarks At lt 5A range Continuous measurement is allowed At 55A range For continuous measurement 10 seconds and interval not less than 15 minutes Displays True RMS applicable to the range of 1096 9596 AC peak factor 3 0 Input short circuit has around less than 30 remaining digits it will not affect accuracy gt AC DC measurement accuracy range s accuracy 1 42 Model UT803 OPERATING MANUAL E Resistance Range Resolution Accuracy Overload Protection 0 8 3 test lead short 6000 0 10 circuit resistance value 6k 60kQ 0 01kQ 0 5 2 poss 600kC 0 1kQ 6MQ 0 001MQ 0 8 2 60MO 0 01MQ 1 2 3 43 F Continuity Test Model UT803 OPERATING MANUAL Range Resolution Overload Protection Remarks i 10 250V rms Open circuit voltage approximate 1 2V When circuit disconnected with resistance value gt 70Q buzzer does not beep When circuit is in good connection with resistance value lt 700 buzzer beeps continuously G Diode Testst Range Resolution Overload Protection Remarks 10mV 250V rms Open circuit voltage approximate 2 7V Working current approximate 1mA 44 Model UT803 OPERATING MANUAL H Capacitance Range Resolution Accuracy Overload Protec
11. 2 Set the rotary switch to Hz F and press SELECT button to select Hz measurement mode 3 Connect the test leads across with the object being measured The measured value shows on the display 28 Model UT803 OPERATING MANUAL Figure 9 Model UT803 OPERATING MANUAL Note When making frequency measurement it must comply with the following scope a requirement When 10Hz 1Mz 1150mV lt a 30V rms When gt 1Mz 10MHz 300mV S a 30V rms When gt 10Mz 50MHz 600mV lt a 30V rms When gt 50Mz Unspecified 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 29 H Temperature Measurement see figure 10 AN Warning To avoid harms to you please do not attempt to input voltages higher than 60V DC or 30V AC To measure temperature connect the Meter as follows 1 Set the rotary switch to C to measure degree celsius temperature or Hz F and press SELECT button to select F measurement mode to measure Fahrenheit temperature 2 Insert the multi purpose socket into the corresponding Hz and COM terminal 3 Insert the temperature probe to the corresponding input terminal of the multi purpose socket 4 Place the temperature probe to the object being measured The measured value shows on the display after few seconds 30 Model UT803 OPER
12. 5 SG 5 SG 7 SG 6 DSR 6 DSR 6 DSR 7 RTS 7 RTS 4 RTS 8 CTS 8 CTS 5 CTS 9 RI 9 22 RI 54 Model UT803 OPERATING MANUAL USB Serial Port A Connecting between the Meter and computer see figure 15 B Setting of USB Serial Ports Install the USB serial port driver according to the Installation Guide amp Computer Interface Software before connecting the Meter and computer Check for the USB Serial port shown at the Control Panel gt System gt Device Manager Make sure connect the Meter and the computer with the same port Please refer to the included Installation Guide amp Computer Interface Software for installing and operating instructions of the UT803 Interface Program The Meter is to be supplied from an identical USB port complying with the requirement of Limit Power Source END UT803 Back Faceplate To COMPUTER SIE S gt INTERFACE CABLE Figure 15 55 56 Model UT803 OPERATING MANUAL This operating manual is subject to change without notice Copyright 2004 Uni Trend International Limited All rights reserved Manufacturer UNI 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 N
13. ATING MANUAL Figure 10 Model UT803 OPERATING MANUAL Note The testing environment must between 18 to 28 to ensure accuracy especially when measuring low temperature Different reading may be obtained when testing room environment under short or open circuit situation then short circuited reading shall be considered as the correct reading The included point contact temperature probe can only be used under 230 C For any measurement higher than that the rod type temperature probe must be used instead When temperature measurement has been completed disconnect the connection between the temperature probe multi purpose socket and the circuit under test and remove the temperature probe away from the input terminals of the multi purpose Socket and remove the multi purpose socket away from the input terminals of the Meter 31 1 Measuring Transistor see figure 11 AN Warning To avoid harms to you please do not attempt to input voltages higher than 60V DC or 30V AC To measure transistor connect the Meter as follows 1 Insert the multi purpose socket into the HAmA and Hz input terminal 2 Set the rotary switch to hFE 3 Insert the NPN or PNP type transistor to be tested into the corresponding input terminals of the multi purpose socket 4 The measured nearest transistor value shows on the display Note When transistor measeurement has been completed remove the tested transistor fr
14. LINII T Model UT803 OPERATING MANUAL Model UT803 OPERATING MANUAL TABLE OF CONTENTS TITLE PAGE o EW 3 Unpacking Inspection 4 Safety Information _ _ _ __ __ __ ___ __ 5 Rules For Safe Operation TOC E eee 6 International Electrical Symbols _ _ _ _ __ ___ ___ 8 The Meter Structure _ _ _ __ __ __ ______________g Rotary Switch 10 Functional B ttons gt 09 95 59 a gt e 11 Display Symbols _ _ __ _ ___ ___ __ 12 Measurement Operation J L A DC or AC Voltage Measurement en M m E 16 B DC or AC Current Measurement 18 C Measuring Resistance 20 D Testing for Continuity 22 E Testing Diodes 24 F Capacitance Measurement
15. MHz Megahertz 1 x 10 or 1 000 000 hertz Unit of transistor 10 E Test of diode 11 1 The continuity buzzer is on 14 Model UT803 OPERATING MANUAL Number Symbol Meaning 12 AutoRange Indicator of Auto or manual range Manual 13 MAX MIN Display of maximum or minimum value 14 Data output is in progress 15 The battery is low AA 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 16 hFE Transistor test is on 15 Measurement Operation A DC or AC Voltage Measurement See figure 3 A Warning To avoid harms to you or damages to the Meter from electric shock please do not attempt to measure voltages higher than 1000V although readings may be obtained To measure DC AC voltage connect the Meter as follows 1 Insert the red test lead into the V terminal and the black test lead into the COM terminal If the measured value is less than 600mV insert the red test lead into mV terminal instead and press RANGE button to select manual range 600 0mV mode the LCD displays MANUAL and mV 2 Set the rotary switch to V amp press SELECT button to select DC or AC measurement mode 3 Connect the test leads across with the object being measured The measured value shows on the display AC measurement displays True RMS value 16 Model UT803 OPE
16. RATING MANUAL Figure 3 Model UT803 OPERATING MANUAL 4 Press AC AC DC button to measure AC DC voltage s true RMS Note In each range the Meter has an input impedance of 10MQ except 600mV range has 3000MQ This loading effect can cause measurement errors in high impedance circuits If the circuit impedance is less than or equal to 10 the error is negligible 0 1 or less When DC AC 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 17 B DC or AC Current Measurement See figure 4 A Warning Before connect the Meter in serial with the tested return circuit close the return circuit s current to avoid the dangerous of sparking If the fuse burns out during measurement the Meter may be damaged or the operator himself may be hurt Use proper terminals function and range for the measurement When the testing leads are connected to the current terminals do not parallel them across any circuit To measure current do the following 1 Insert the red test lead into the pA mA terminal and the black test lead into the COM terminal 2 Set the rotary switch to an appropriate measurement position in JA or AX press SELECT button to select AC or DC measurement mode 3 Connect the test leads in serial with the object being measured The measured value sho
17. an Union Model UT803 OPERATING MANUAL The Meter Structure see figure 1 Figure 1 1 LCD Display 2 Rotary Switch 3 Input Terminals 4 Functional Buttons Rotary Switch Model UT803 OPERATING MANUAL Below table indicated for information about the rotary switch positions Rotary Switch Position Function VN AC and DC voltage measurement 2 E e Continuity test Diode test Resistance measurement 4 Capacitance test Hz Hz Frequency measurement F Temperature in Fahrenheit C Temperature in celsius hFE Transistor test AC or DC current measurement range from 0 1uA to 5999uA mA S AC or DC current measurement range from 0 01mA to 599 9mA N AC or DC current measurement range from 0 01A to 10 00A 10 Model UT803 OPERATING MANUAL Functional Buttons Below table indicated for information about the functional button operations Button Operation Performed POWER Turn the power on and off LIGHT Turn the display backlight on and off SELECT Switches between AC and DC measurement Switches between continuity and diode and resistance measurements Switches between frequency and Fahrenheit temperature HOLD Press HOLD to enter and exit the Hold mode in any mode the Meter beeps RANGE Press RANGE to switch between manual and auto ranging RS232C Turn on or off the serial port interface without changing the ori
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19. eter as below 1 Insert the red test lead into the terminal and the black test lead into the COM terminal 2 Set the rotary switch to Q and press SELECT button to select measurement mode 3 Connect the test lead across with the object being measured The buzzer sounds if the resistance of a circuit under test is 70Q the circuit is in good condition The buzzer does not sound if the resistance of a circuit under test is gt 70Q the circuit is broken 4 The measured value shows on the display and the unit is Q 22 Model UT803 OPERATING MANUAL COO Figure 6 Model UT803 OPERATING MANUAL Note Open circuit voltage around 1 2V and range is 6000 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 23 E Testing Diodes See figure 7 A Warning To avoid possible damage to the Meter and to the device under test disconnect circuit power and discharge all high voltage capacitors before testing diodes To avoid harms to you please do not attempt to input voltages higher than 60V DC or 30V AC Use the 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
20. ginal setting MAX MIN Starts recording of maximum and minimum values Steps the display through high MAX and low MIN AC 0 To select AC or AC DC measurement 11 nFE LMN 12 Figure 2 Model UT803 OPERATING MANUAL Model UT803 OPERATING MANUAL Number Symbol Meaning 1 True RMS Indicator for true rms value 2 Data hold is active 3 Sleep Mode feature is enabled 4 Indicates negative reading 5 AC Indicator for AC voltage or current 6 DC Indicator for DC voltage or current 7 AC DC Indicator for AC DC measurement 8 OL The input value is too large for the selected range 9 O KO MO Ohm The unit of resistance kilohm 1 x 10 or 1000 ohms MQ Megaohm 1x10 or 1 000 000 ohms A amps The unit of current mA Milliamp 1 x 10 or 0 001 amperes uA Microamp 1x 10 or 0 000001 amperes 13 Model UT803 OPERATING MANUAL Number Symbol Meaning 9 V mV V Volts The unit of voltage mV Millivolt 1 x 10 or 0 001 volts F mF F Farad The unit of capacitance pF nF mF Millifarad 1 x 10 or 0 001 farads uF Microfarad 1x10 or 0 000001 farads nF Nanofarad 1 x 10 or 0 000000001 farads C F Centigrade temperature Temperature in Fahrenheit Hz kHz Hz Hertz The unit of frequency in cycles second MHz kHz Kilohertz 1 x 103 or 1 000 hertz
21. he black test lead into the COM terminal 2 Set the rotary switch to 3 Connect the test leads across with the object being measured The measured value shows on the display 26 Model UT803 OPERATING MANUAL Figure 8 Model UT803 OPERATING MANUAL Note The Meter displays a fixed value which is the distributed capacitor s value of the inside Meter To ensure accuracy it is necessary to subtract this value from the measured value when measuring small capacitor Multi purpose socket can be used instead of testing leads Insert the capacitor being tested into the corresponding input terminal of the multi purpose socket When measuring small capacitor value more accurate value can be obtained using multi purpose socket It is normal to take a longer time when testing a capacitor value higher than 600LF The LCD displays 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 terminals of the Meter 27 G Frequency Measurement see figure 9 A Warning To avoid harms to you please do not attempt to input tested frequency s voltages higher than 30V rms To measure frequency connect the Meter as follows 1 Insert the red test lead into the Hz terminal and the black test lead into the COM terminal
22. o 104 F Storage 10 C to 50 C 14 F to 122 F Relative Humidity 7596 0 C 30 C below 50 30 40 C Altitude Operating 2000 m Storage 10000 m Below 1V m electrostatic discharge Accuracy specified accuracy 5 of the range Over 1V m electrostatic discharge Without specified accuracy Power AC220V 50Hz or 6 pieces of 1 5V battery R14 Battery Deficiency Display ra Dimensions HxWxL 105 x 240 x 310 mm Weight Approximate 2kg accessories excluded Safety Compliances IEC61010 CAT 1000V CAT II 600V overvoltage and double insulation standard Certifications C UL pending 37 Model UT803 OPERATING MANUAL Accuracy Specifications Accuracy a reading b digits guarantee for 1 year Operating temperature 23 5 Relative humidity not more than 75 RH Temperature coefficient 0 1 x specified accuracy 1 C A DC Voltage Range Resolution Accuracy Overload Protection 600mV 0 1mV 0 6 2 6V 0 001V 1000V 60V 0 01V 0 3 2 600V 0 1V 1000V 1V 0 5 3 Remarks Input Impedance At 600mV range Around gt 3000MQ At all other ranges Around 10MQ 38 Model UT803 OPERATING MANUAL B AC Voltage Range Resolution Accuracy Overload Protection 40Hz 50kHz 0 6 5 d gt 50kHZ 100kHz 1 5 40Hz 1kHz 0 6 5 6V gt 1kHz 10kHz 1 0 5 10kHz 100kHz 3 5
23. om the multi purpose socket and remove the multi purpose scoket from the input terminal 32 Model UT803 OPERATING MANUAL Model UT803 OPERATING MANUAL Operation of Hold Mode AN 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 Press HOLD to enter Hold mode Press HOLD again to exit Hold mode and the Meter displays the present measurement value In Hold mode il is displayed The POWER Button This is a self lock switch uses to turn on or off the power of the Meter It is located at the tail of the Meter means power up the Meter while O means power off the Meter The SELECT Button It uses for selecting the required measurement function when there is more than one function at one position of the rotary switch 33 Turning on the Display Backlight AN Warning In order to avoid the hazard arising from mistaken readings in insufficient light or poor vision please use Display Backlight function Press LIGHT button to turn the Display Backlight on Press LIGHT button again to turn the Display Backlight off otherwise it will stay on continuously When using the AC power to turn the Meter on the Display Backlight always stays on 34 Model UT803 OPERATING MANUAL The RANGE Button Press RANGE to en
24. onal injury read the Safety Information and Rules for Safety Operation carefully before using the Meter Digital Bench Type True RMS Multimeter Model UT803 hereafter referred to as the Meter has autorange and manual range options with maximum reading 5999 and 3 5 6 digits which has a unique outlook design In addition to all the conventional features including DC AC voltage current resistance diode continuity test capacitance temperature C and F transistor max min there is a data hold low battery display sleep mode RS232C and USB standard serial port for easy connection with computer to realize macro recording and monitoring and capture of transient dynamic data displaying change of waveform during the measurement providing data and evidence to engineering technicians for scientific research This is also a highly applied digital multimeter of good performance with full overload protection and display backlight function Model UT803 OPERATING MANUAL Unpacking Inspection Open the package case and take out the Meter Check the following items carefully to see any missing or damaged part Wem Description O ay 1 Operating Manual 1 piece 2 Test Lead 1 pair 3 Alligator Clip 1 pair 4 Multi Purpose Socket 1 piece 5 Point Contact Temperature Probe to be used under 230 C temperature measurement 1 piece 6 Power Cord AC 250V 1 piece 7 RS232C Interface Cable 1 piece 8 USB Interface
25. p of he front case Remove all the batteries from the battery compartment Replace the battery with new 6pcs of 1 5V battery R14 Rejoin the battery compartment and also the accessories compartment located at the top of the front case Figure 13 51 RS232C and USB Serial Port System Requirements for Installing the UT803 Interface Program To use UT803 Interface Program you need the following hardware and software An IBM PC or equivalent 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 52 Model UT803 OPERATING MANUAL Model UT803 OPERATING MANUAL RS232C Serial Port A Connecting between the Meter and computer see figure 14 UT803 Back Faceplate To COMPUTER E Sra3s Figure 14 53 Model UT803 OPERATING MANUAL B RS232C Port Cable C Setting of RS232C Serial Ports The Meter Computer Default of RS232C serial port for communication is set as D sub D sub D sub Baud Rate 19200 9 Pin Male 9 Pin Female 25 Pin Female Start bit 1 1 DCD 1 DCD 8 DCD Stop bit 1 2 RXD 3 TXD 2 TXD Data bits 7 3 TXD 2 RXD 3 RXD Parity Odd 4 DTR 4 DTR 20 DTR
26. ter the manual ranging mode the Meter beeps Press and hold RANGE for over 1 second to return to autoranging the Meter beeps Model UT803 OPERATING MANUAL The MAX MIN Button MAX MIN recording mode captures and stores the maximum and minimum input value detected To use the MAX MIN mode as follows Press MAX MIN to display the highest reading is shown on display Press MAX MIN again to display the lowest reading MIN is shown on display Press and hold MAX MIN for over 1 second to exit the MAX MIN mode AC AC DC Button It is used to select measuring AC or AC DC when measuring AC Press it only at the AC voltage or current measuring mode which is at the rotary switch position Vzz MVNA WAN MAN or AN DC will be displayed when it is pressed under DC measurement mode POWER INPUT Switch It is used to select AC 220V 50Hz or DC 6pcs of 1 5V battery R14 to power on the Meter It is located at the tail of the Meter 35 Sleep Mode When the Meter display symbol it automatically turns off if you do not turn the rotary switch or press any button for around 10 minutes to preserve battery The last measurement value will be kept The Meter can be activated by pressing the POWER button off and then on or pressing the HOLD button it will display the last measurement value before it entered sleep mode and under the HOLD mode Turning the rotary switch can also activate the Meter However it
27. tion 6nF 0 001nF 2 5 5 60nF 0 01nF 600nF 0 1nF RER 6uF 0 001uF 2 5 60uF 0 01uF 600uF 0 1uF 3 4 6mF 0 001mF 5 4 Remarks At 6nF 60nF and 600nF Range reading must subtract the test lead open circuit capacitance value 45 Model UT803 OPERATING MANUAL 1 Frequency Range Resolution Accuracy Overload Protection 6kHz 0 001kHz 60kHz 0 01kHz 600kHz 0 1kHz 0 1 3 250V rms 6MHz 0 001MHz 60MHz 0 01MHz Remarks Input scope a DC electric level is zero When 10Hz 1MHz 150mV lt a 30V rms When gt 1MHz 10MHz 300mV lt a lt 30V rms When gt 10MHz 50MHz 600mV lt a 30V rms When 50MHz Unspecified 46 Model UT803 OPERATING MANUAL J Temperature Range Accuracy Overload Protection 40 C 0 C 8 5 C 1 C gt 0 C 400 C 1 3 gt 400 C 1000 C 1 5 3 250V rms 40 C 32 C 8 5 OF 1 gt 32 F 752 F 1 5 5 gt 752 F 1832 F 2 5 5 Remarks The included point contact temperature probe can only be used to measure under 230 C temperature For any measurement higher than that the rod type temperature probe must be used instead K Transistor Fuse 200mA 250V fast type 5x20mm Vce 2 2V bo 10 Fuse 500mA 250V fast type 5x20mm 1000B MAX hFE 18 47 Maintenance This section provides basic maintenance information including battery and fuse replacement
28. ttery indicator C appears With a low battery the Meter might produce false readings that can lead to electric shock and personal injury Remove test leads temperature probe RS232C interface cable USB interface cable and alligator clip from the Meter and turn the Meter power off before opening the Meter case When servicing the Meter use only the same model number or identical electrical specifications replacement parts The internal circuit of the Meter shall not be altered at will to avoid damage of the Meter and any accident Soft cloth and mild detergent should be used to clean the surface of the Meter when servicing No abrasive and solvent should be used to prevent the surface of the Meter from corrosion damage and accident The Meter is suitable for indoor use Turn the Meter power off when it is not in use Take out the battery when not using for a long time if using battery to power on the Meter When using battery to power on the Meter constantly check the battery as it may lead when it has been using for some time replace the battery as soon as leaking appears A leaking battery will damage the Meter Model UT803 OPERATING MANUAL International Electrical Symbols I AC or DC Grounding El Double Insulated A Warning Refer to the Operating Manual Deficiency of Built In Battery en Continuity Test gt Diode Ae Capacitance Test Fuse Conforms to Standards of Europe
29. will start from the switch selected function and it will not display the last measurement value before it entered sleep mode To disable the Sleep Mode function press MAX MIN RANGE or RS232 button while turning on the Meter the symbol disappears 36 Model UT803 OPERATING MANUAL RS232 Button Press RS232 button to enter or exit data output mode In RS232C serial port data output mode the Hold and Max Min mode cannot output to the computer the computer will only display the present measuring value In RS232C serial port data output mode Sleep Mode function will be disabled symbol disappears DC hFE and cannot output to the computer Model UT803 OPERATING MANUAL General Specifications Maximum Voltage between any Terminals and Grounding Refer to different range input protection voltage A Fused Protection for HzQmV Input Terminal 200mA 250V fast type 5x20mm only apply on hFE functions Fused Protection for Input Terminal 500mA 250V fast type 5 20 Fused Protection for 10A Input Terminal 10A 250V fast type 5 20 A Fused Protection for AC220V Terminal 200 250V fast type 5 20 At AC220V power without fuse protection Maximum Display Digital 5999 Measurement Speed Updates 2 3 times second Range Manual or auto ranging Polarity Display Auto Overloading Display OL Temperature Operating 0 C to 40 C 32 F t
30. ws on the display AC measurement displays True RMS value 4 Press AC AC DC button to measure AC DC current s true RMS 18 Model UT803 OPERATING MANUAL Figure 4 Model UT803 OPERATING MANUAL Note If the value of current to be measured is unknown use the maximum measurement position and reduce the range step by step until a satisfactory reading is obtained For safety sake each measurement time of high current gt 5A should be less than 10 seconds and the interval time between 2 measurements should be greater than 15 minutes 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 19 C Measuring Resistance see figure 5 Warning To avoid damages to the Meter or to the devices under test disconnect circuit power and discharge all the high voltage capacitors before measuring resistance To avoid harms to you please do not attempt to input voltages higher than 60V DC or 30V AC To measure resistance connect the Meter as follows 1 Insert the red test lead into the Q terminal and the black test lead into the COM terminal 2 Set the rotary switch to Q br press SELECT button to select measurement mode 3 Connect the test leads across with the object being measured The measured value shows on the display 20 Model UT803 OPERATING MANUAL

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