PMS 425C PMS 1797C
Contents
1. Figure 3 4 DCA Currents Measurement A Warning 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 current Use proper terminals function and range for the measurement Never place the testing leads in parallel with any circuit or component when the leads are plugged into the current terminals To measure DCA current set up the Meter as Figure 3 4 and proceed as follows 1 Insert the red test lead into the AmA terminal and black test lead into the COM terminal 2 Set the rotary switch to LAS DC measurement is default or press SELECT button to select DC measurement mode 3 Connect the test leads in serial with the object being measured The measured value shows on the display It displays the RMS 29 ACA range measurement 07804 AutoRange True RMS 3BHB 008 uL 1000 Figure 3 5 ACuA Currents Measurement 30 Model UT804 OPERATING MANUAL To measure current set up the Meter as Figure 3 5 and proceed as follows 1 Insert the red test lead into the AmA terminal and black test lead into the COM terminal 2 Set the rotary switch to uA DC measurement is2. Range Resolution Accuracy Overload Protection 400Q 0 010 0 3 40 test leads open circuit value 4kQ 0 0001kQ 0 3 40 40kQ 0 001kQ 400kQ 0 01kQ 0 595440 1000 4 0 0001 0 1 40 40MQ 0 001MQ 1 5 40 F Continuity Test Range Resolution Overload Protection 1 0 010 1000V Remarks Open circuit voltage approximate 1 2V The buzzer does not sound when the test resistance is 2500 The beeper comes on continuously for open conditions that is test resistance is lt 10Q 62 Model UT804 OPERATING MANUAL G Diode Test Range Resolution Overload Protection 0 0001 1000V Remarks Open circuit voltage approximate 2 8V Agood silicon junction drops between 0 5V and 0 8V H Capacitance Range Resolution Accuracy Overload Protection 40nF 0 001nF 1 20 capacitance value of open circuit test leads 400nF 0 01nF 4uF 0 0001 UF t 1 20 40 0 001 400uF 0 01 uF 1 2 20 4mF 0 0001mF t 59620 40mF 0 001mF Not specified 1000V 63 Model UT804 OPERATING MANUAL 1 Frequency Range Resolution Accuracy Overload Protection 40Hz 0 001Hz 400Hz 0 01Hz 4kHz 0 0001kHz 40kHz 0 001kHz 0 01 8 400kHz 0 01kHz 1090y 4MHz 0 0001MHz 40MHz 0 001 MHz 400MHz 0 01MHz Not Specified Remarks Input amplitude a as f
3. 1000V CAT IV 600V overvoltage and double insulation standard A Fused Protection for AmA input terminal 0 5A 250V fast type fuse 05 20 A Fused Protection for A input terminal 10A 250V fast type fuse 05 20 A Fused Protection for power socket 0 2A 250V fast type fuse 05 20 54 Model UT804 OPERATING MANUAL Physical Specifications Display LCD Operating Temperature Storage Temperature Digital 40000 counts on primary display updates 2 3 times second 4000 counts on secondary display Analog 40 segments updates 10 times second 0 C 40 C 32 F 104F 0 C 40 C 32 F 104 F Relative Humidity lt 75 9 0 C 30 C below lt 50 9 30 C 40 C Altitude This Meter can be used in indoor and altitude not more than 2000M Power Battery Type 6pcs x 1 5V battery R14 AC 200V 240V 50Hz Electromagnetic Compatibility In a radio field of 1 V m below Overall Accuracy Specified Accuracy 5 of Range Ina radio field of 1 V m above No assigned accuracy is specified Dimensions H x W x L 105 x 240 x 310 mm Weight Approx 3kg including battery 55 General Specifications Model UT804 OPERATING MANUAL Range Auto Polarity Auto Overloading Display OL except at 4 20mA Loop range which display HI or LO Battery Deficiency Display Feature Summary Tri Displays Primary 40 000 counts L
4. 44 Fuse Replacement 2551 Battery Replacement _ _ _ _ _ 53 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 personal injury read the Safety Information and Rules for Safe Operation carefully before using the Meter Bench Type Digital Multimeter UT804 hereafter referred to as the Meter is a 40000 counts and 4 3 4 digits with steady operations fashionable structure and auto ranging instrument It not only can measure AC voltage and current DC voltage and current Resistance Capacitance Temperature Frequency Diodes Continuity 4 20mA Loop Max Min Relative Mode but also has Setup Data Store Data Recall AC True RMS or AC DC Voltage and Current Low Battery Display 6 Model UT804 OPERATING MANUAL Chapter 1 Before You Start White Colour Display Backlight Data Hold Automatic Power Off and full overload protection Model UT804 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 Table 1 1 Unpacking Inspection Item Description Qty 1 English Operating Manual 1 piece 2 Test Lead 1 pair 3 K Type nickel chromium nickel silicon Poin
5. 250V fast type fuse 05 20 400mA 0 01mA 10A 0 001A t 0 5 30 10A 250V fast type fuse 05 20 Remarks At 10A range When the measured current is S5A continuous measurement is allowed When the measured current is between gt 5A 10A continuous measurement lt 10 seconds and interval more than 15 minutes 60 Model UT804 OPERATING MANUAL D AC Current AC DC measurement is available Range Resolution Bandwidth Accuracy Overload Protection 400 0 01uA 45Hz 1kHz 0 7 15 4000 1 gt 1kHz 5kHz 1 30 40mA 0 001mA gt 2 10 2 296440 se He 400mA 0 01mA 45Hz 1kHz 1 5 40 10 0 001A gt 1 2 5kHz 2 5 40 10A 250V fast type fuse 5 20 gt 5kHz 10kHz 5 40 Remarks Display a True rms are valid from 10 of range to 100 of range b AC crest factor can be up to 3 0 C Aresidual reading of 80 digits with test leads shorted will not affect stated accuracy d The accuracy guarantee range 10956 10096 e When making AC DC measurment the accuray need to add 1 35 digits of reading based on the above table At 10A range a When the measured current is lt 5A continuous measurement is allowed b When the measured current is between gt 5A 10A continuous measurement lt 10 seconds and interval more than 15 minutes 61 Model UT804 OPERATING MANUAL E Resistance
6. input tested frequency voltage higher than 30V rms 42 Model UT804 OPERATING MANUAL To measure frequency and duty cycle connect the Meter as Figure 3 14 and do the following 1 2 Insert the red test lead into the Hz terminal and the black test lead into the COM terminal Set the rotary switch to mv and press SELECT button to select the Hz measurement mode for frequency measurement or for duty cycle measurement SELECT button cycles amongmV frequency and duty cycle Connect the test leads across with the object being measured The measured value shows on the primary display Note The requirement of Input amplitude a is as follows When 10Hz 40MHz 200 mV lt a 30Vrms 240MHz Un specified When Hz or Duty Cycle measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove the test leads away from the input terminals Model UT804 OPERATING MANUAL J Measuring Temperature ENE ureos DD23B ss ero rr Cru Figure 3 15 Temperature Measurement AN Warning To avoid harms to you please do not attempt to input voltages higher than 60V DC or 30V AC To measure temperature set up the Meter as shown in Figure 3 15 and proceed the following Set the rotary switch C F the display shows OL Short
7. terminal and the black test lead into the COM terminal 2 Set the rotary switch to measurement mode the Meter may display a fixed reading which is a internal distributed capacitor value For testing less than 10nF capacitor the tested value must subtract the3 It is recommended to use test clip to carry out measurement to reduce the effect of internal distributed Model UT804 OPERATING MANUAL accuracy To improve the measurement accuracy of small value capacitors less than 10nF press REL A with the test leads open to subtract the residual capacitance of the Meter and leads 3 It is recommended to use test clip to carry out measurement to reduce the effect of internal distributed capacitor Note The LCD displays OL indicating the tested capacitor is shorted or it exceeds the maximum range Capacitors larger than 400LF take longer time The analogue bar graph shows the time left before finishing the measurement When capacitance measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove the test leads away from the input terminals of the Meter 41 1 Measuring Frequency Duty Cycle UT804 TOAwe v f T O O Q O d EL N Figure 3 14 Frequency Duty Cycle Measurement A Warning To avoid harms to you please do not attempt to
8. 4 40 400 4 40 The tested C value No display 1000 F The tested F value No display 1832 DCHA The tested DCuA value N A Full range 400 4000 ACHA The tested value The tested frequency value Full range 400 4000 40 00kHz 100 0kHz DCmA The tested DCmA value No display Full range 40 400 Model UT804 OPERATING MANUAL Table 2 3 Functions Vs Displays value Function Primary Display Lower Right Secondary Upper Right Secondary Display Display ACmA The tested value The tested frequency value Full range 400 4000 40 00kHz 100 0kHz DCA The tested DC current value No display Full range 10 ACA The tested AC current value The tested frequency value Full range 10 40 00kHz 100 0kHz STORE The current measurement The value of the Index number increase one reading corresponding index number Index number no 0001 no 9999 RECALL The recalled value The total number of stored Index number no 0001 no 9999 value MAX MIN Chapter 2 Getting Acquainted Using MAX MIN REL The present measurement The stored value The present measurement value value minus the stored 19 Selecting the Range Press RANGE to enter manual ranging mode and select a fixed range Autoranging AUTO lighted in the display always comes on initially when you select a new function In autorange the Meter selects the lowest input range possible ensuring that the
9. Store each press to increase a second on the storing interval mode Press to exit certain button functions and the Meter will return Press the button once to the factory default setting pak Peak feature Press and hold the button for Press to access Peak Hold feature the primary display shows over 1 second the peak hold reading The Meter can measure around as low as pulse 1045 peak signal The Meter shows Peak Press EXIT to exit e When it is at AC measurement mode press the button to Press the button down display AC DC True RMS value and AC DC 17 The Meter Functions Vs Displays Table 2 3 shows the cross reference of function and display Table 2 3 Functions Vs Displays Model UT804 OPERATING MANUAL Function Primary Display ae Right Secondary Upper Right Secondary Display isplay DCV The tested DC voltage value No display Full range 4 40 400 1000 ACV The tested AC voltage value The tested frequency value Full range 4 40 400 750 40 00kHz 250 0kHz DCmV The tested DCmV value No display Full range 400 Q The tested resistance value No display Full range 400 4 40 400 4 40 1 The tested resistance value No display Full range value 400 gt J The tested resistance value No display Full range 4 Hz The tested frequency value No display Full range 40 400 4 40 400 4 40 400 The tested capacitance value No display Full range 40 400
10. C K PMS 425C P N 41451520 uUT804 Operating Manual Bench Type Digital Multimeter LINII T Model UT804 OPERATING MANUAL Model UT804 OPERATING MANUAL Chapter 1 Title Before You Start Table of Contents Page Overview A Unpacking egedon s Safety Information C Rules For Safe Operation International Electrical Symbols Getting Acquainted Turning the Meter On Battery Considerations Automatic Power Off Automatic Backlight Off Low Battery Indication __ The Meter Structure Sie Rotary Switch Functional Buttons lt A The Meter Functions Vs Mod Selecting the Range Understanding the Display Analogue Bar Graph Using MAX MIN Making Measurements A Measuring DC Voltage B Measuring AC Voltage Model UT804 OPERATING MANUAL Table of Contents Chapter Title Page C Measuring DC Millivoltage _ _ _ _ _ __ __ ___ ___ ___ 28 D Measuring Currents 29 E Measuring Resistance 85 F Testing for Continuity
11. Fuse 3 0 2A 250V fast type fuse 05 20 52 Model UT804 OPERATING MANUAL Rejoin the fuse cover and the power socket Rejoin the compartment and the case top and close the compartment Replacement of the fuses is seldom required Burning of a fuse always results from improper operation Model UT804 OPERATING MANUAL C Replacing the Battery Figure 6 2 Battery Replacement A 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 when the Meter is under battery operated siutation When the Meter is under battery operated siutation battery cannot be re charged Make sure the test leads are disconnected from the circuit being tested before opening the case bottom Follow Figure 6 2 and proceed as follows to replace the battery Switch off the Meter disconnect the power cord and remove all connections from the terminals Use the coin to open the compartment at the case top and separate the compartment from the case top Replace with a new 6F22 9V battery Rejoin the case top and compartment and close the compartment 53 Model UT804 OPERATING MANUAL Chapter 7 Specifications Safety and Compliances Maximum Voltage between any Terminal and Grounding Refer to different range input protection voltage Certification Compliances IEC 61010
12. NG MANUAL Table 2 1 2 2 3 2 3 3 3 4 3 5 3 7 3 8 3 10 3 11 3 12 3 13 3 14 3 15 3 16 6 2 List of Tables Title Page Meter Structure _ _ _ _ _ ___ __ __ __ __ 12 Display Features _ _ _ _ __ __ __ __ ___ 29 DC Voltage Measurement 25 AC Voltage Measurement 27 DC Millivoltage Measurement 28 DCLA Currents Measurement o 29 ACLA Currents Measurement 30 DCmA Currents Measurement 81 ACmA Currents Measurement es 82 DCA Currents Measurement 83 ACA Currents Meaasurement _ _ _ _ 34 Resistance Measurement 35 Continuity Test c cs 87 Diode Test 38 Capacitance Measurement J D A c TNR 40 Frequency Duty Cycle Measurement 42 Temperature Measurement 43 4 20mA loop current as readout
13. NG MANUAL Functional Buttons The buttons activate features that augment the function selected with the rotary switch The buttons are shown in Table 2 2 Table 2 2 Functional Buttons Button Description Access Method SELECT feature Press the button once Use the blue button to select any rotary switch alternate function LIGHT labeled in blue letters LIGHT feature Press and hold the button for Under battery operated situation turn the display backlight on around 1 second Under AC operated situation the backlight is always on cannot turn off Exit AUTO and enter MANUAL ranging In MANUAL select Press the button once next input range Press EXIT to return to AUTO AUTO is default Store the current measurement value Press EXIT to exit the Press the button once Store feature Recall the stored value Press EXIT to exit the Recall feature Press the button once Access Setup selections the display shows SET flashing Press the button once In the Setup mode each press of SETUP button steps to the next Selection 15 Table 2 2 Functional Buttons Model UT804 OPERATING MANUAL In Recall press to enable SEND feature In Store press to toggle between clearing all the stored reading or start storing reading from the current index number Button Description Access Method Press to output the data AUTO mode switch off The primary Press the button once display show
14. The upper right secondary display shows the storing time interval in second it is preset to zero which means it will not auto update reading To change the interval in second by pressing or Model UT804 OPERATING MANUAL Chapter 4 Using Store Recall amp Send Features button The interval can be as high as 255 seconds or as low as 0 second Press and hold or to access the quick setting Press STORE the third time STORE and No 9999 appears The upper right secondary display shows the index number increase one The lower right secondary display shows the value of the corresponding index number the primary display shows the current measurement reading If there is no set time to store the reading each press of STORE to store one reading An index number increase one The maximum number of stored reading is 9999 When the stored readings memory is full the Meter will stop storing data To exit and stored the reading press EXIT To exit without storing the reading turn the Meter off directly Automatic power off feature will be disabled after entering this mode Model UT804 OPERATING MANUAL Recalling Stored Readings Use the following procedure to recall the stored reading Press RECALL to recall the stored value and RECALL appears to confirm the operation The upper right secondary display shows the index number The primary display shows the corresponding recalled data The lower rig
15. al Buttons 3 Rotary Switch Figure 2 1 Meter Structure 4 Input Terminals 12 Model UT804 OPERATING MANUAL Rotary Switch Turn the Meter on by selecting any measurement function The Meter presents a standard display for that function The display may also be influenced by some of the choices made in Setup Use the blue SELECT button to select any rotary switch alternate function labeled in blue letters When you turn the rotary switch from one function to another a display for the new function appears Button choices made in one function do not carry over into another function 13 The Table 2 1 described each rotary switch position Table 2 1 Rotary Switch Selections Model UT804 OPERATING MANUAL Rotary Switch Position Rotary Switch Function Blue SELECT Function V DC voltage measurement None Y AC voltage measurement None Hz Duty DC millivoltage measurement Frequency measurements Duty Cycle measurement Ld Resistance measurement Diode test Continuity test Jc Capacitance measurement None CF Centigrade temperature measurement Fahrenheit temperature measurement AC or DC current measurement 400 4000 Toggle between AC or DC current mA Ri 96 AC or DC current measurement 40mA 400mA Toggle between AC or DC current 4 20mA loop current as 96 reading Ax AC or DC current measurement 10A Toggle between AC or DC current 14 Model UT804 OPERATI
16. ature connect the Meter as follows 1 Set the rotary switch toma 9e and press SELECT button to select 4 20mA 96 feature 2 The rest procedure please follow D Measuring Current DC current measurement 44 Model UT804 OPERATING MANUAL 3 When the readings obtained is lt 4mA the primary display shows LO 4mA the primary display shows 0 20mA the primary display shows 100 gt 20mA the primary display shows Note When the measured current is lt 5 continuous measurement is allowed When the measured current is between 5A 10A continuous measurement 10 seconds and interval more than 15 minutes Do not attempt to measure higher than 10A When measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove the test leads away from the input terminals 45 Introduction Chapter 4 shows you how to use stores recall and communication features available on the Meter Store and Clearing Readings To store readings proceed as follows 46 Press STORE once STORE and No xxxx appears to confirm the operation and the upper right secondary display shows the current measurement reading Press K to toggle between clearing the stored readings and start from the first readings or start from the last stored reading Lower right secondary display shows the original number of records Press STORE the second time STORE and s appears
17. circuit the test leads to show the room temperature 2 Insert the point contact temperature probe into the Meter as figure 10 3 Place the temperature probe to the object being measured The measured value shows on the display after several seconds 4 The Meter is default to Celsius C degree unit you can change units by press the SELECT button once you have selected the temperature function Note Place the Meter in an environment of 18 C 28 C otherwise false reading may be obtained especially in testing low temperature The included point contact temperature probe can only be used with temperature 230 C below When temperature measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove the test leads away from the input terminals 43 Model UT804 OPERATING MANUAL K 4 20 mA loop current as readout A Warning To avoid electric shock please take extra care during measurement To avoid harms to the Meter and yourself never input higher than 250V from socket although readings may be obtained UT804 0 Saag Before the Meter and the tested object are connected to the to be tested return circuit turn the return circuit power off It shows the mA measured value or output level in in a 4 20mA scale Figure 3 16 4 20mA loop current as readout To use 4 20mA Loop fe
18. default press SELECT button to select AC measurement mode 3 Connect the test leads in serial with the object being measured The measured value shows on the display It displays the True RMS value 4 When a ACV function is selected you can press the AC DC button to view the AC DC True RMS value in the primary display To exit please EXIT button Model UT804 OPERATING MANUAL DCmA range measurement UT804 Auto Range TA 120710 9 RRS eee So TEE TE Y p d p True RMS Multimeter Black Figure 3 6 DCmA Currents Measurement To measure DCmA current set up the Meter as Figure 3 6 and proceed as follows 1 Insert the red test lead into the AmA terminal and black test lead into the COM terminal 2 Set the rotary switch to mAx DC measurement is default or press SELECT button to select DC measurement mode 3 Connect the test leads in serial with the object being measured The measured value shows on the display It displays the RMS 31 ACmA range measurement UT804 EE Cem z mA VaR Figure 3 7 ACmA Currents Measurement 32 Model UT804 OPERATING MANUAL To measure ACmA current set up the Meter as Figure 3 7 and proceed as follows 4 Insert the red test lead into the AmA
19. e information 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 the Meter to OFF when it is not in use Take out the battery when it is not 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 Chapter 6 Maintenance B Replacing the Fuses Figure 6 1 Fuse Replacement 51 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 Follow Figure 6 1 and proceed as follows to replace the Meter s fuse Switch off the Meter disconnect the power cord and remove all connections from the terminals Remove the fuse cover from the power socket at the Meter s back then remove the Fuse 3 by gently prying one end loose then take out from its bracket Use the coin to open the compartment at the case top then remove the Fuse 1 and 2 by gently prying one end loose then take out from its bracket 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 0 5A 250V fast type fuse 05 20 Fuse 2 10 250V fast type fuse 05 20
20. e 5 1 Setup Selections Selection Option Factory Description Default HIGH Max 40000 OFF Over the upper limits beeps not continuously Press to select OFF Press 4 to select the digit you want to edit LOW Max 40000 OFF Over the lower limits beeps not continuously Press p to select OFF Press to select the digit you want to edit 10 10 mins 10 mins power off 20 20 mins power off 30 30 mins power off OFF Power off feature is disabled 1 1 S1 Beeps continuously and icon lights on OFF No beep icon flashes 44 10 10 Backlight turn off 10 seconds Q 20 Backlight turn off in 20 seconds 30 Backlight turn off in 30 seconds OFF Disable backlight feature Analogue Zero is in the left hand side Zero is in Jmm Bar Graph Zero is in the center the left hand side It can only apply DCV and DCI functions 49 Model UT804 OPERATING MANUAL Saving Setup Options At each setup Option store your choice and exit setup by press EXIT advance to the next Option by press To exit the Setup mode without saving the present Option press Setup 50 Model UT804 OPERATING MANUAL This chapter provides basic maintenance information including battery and fuse replacement 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 servic
21. eft Secondary 4000 counts Right Secondary 4000 counts Analogue Bar Graph Bar Graph 40 segments updates 10 times second Backlight Bright backlight for clear readings in poorly lighted areas Autorange The Meter automatically selects best range AC DC True RMS AC RMS Choices for AC only or AC DC readings Data Hold Holds readings on display Continuity Beeper sounds for resistance readings below threshold Bar Graph 40 segments Duty Cycle Measure signal on or off time in MAX MIN Mode Record maximum and minimum Battery Access Door Battery replaceable 56 Model UT804 OPERATING MANUAL Basic Specifications Function Ranges Description DC Voltage 0 to 1000V AC Voltage True RMS 0 to 1000V 100kHz bandwidth Basic Accuracy DC Voltage 0 025 AC Voltage 0 4 DC Current 0 to 10A 5 10A for 10 seconds interval 2 15 minutes AC Current True RMS 0 to 10A 5 10A for 10 seconds interval 215 minutes Resistance 0 to 40MQ Capacitance 0 to 40mF Frequency 0 400MHz Temperature 40 C 1000 C 40 F 1832 F STORE Readings Up to 9999 readings may be saved by the user in a memory These readings may be viewed by using Recall feature 57 Detailed Accuracy Specifications Accuracy of reading number of least significant digits guarantee for 1 year Operating temperature 18 C 28 C Relative humidity lt 75 RH M
22. esses 87 G Testing Diodes dern crc a 38 H Measuring Capacitance I A A 40 Measuring Frequency Duty Cycle j 42 J Measuring Temperature 43 K 4 20mA loop current as readout 44 4 Using Stores Recall and Send Features 9 46 Introduction gt 46 Storing and Clearing Readings 46 Recalling Stored Readings _ _ _ _ _ _ _ __ 47 Using Send M L 5 Changing the Default Setting us 48 Introduction pe 48 Selecting Setup Options _ _ 48 Saving Setup Options T 0 6 Maintenance 51 A General Service T r r ree an 51 B Replacing the Fuses LLL LLL Lll 51 C Replacing the Battery 2 2 2 53 Model UT804 OPERATING MANUAL Chapter Title Page T Specifications __ __ __ ___________________________ B4 Safety and Compliances B4 Physical Specifications _ _ _ _ __ __ __ __ General Specifications 56 Feature Summary _ _ _ _ _ _ __ _ 5 Basic Specif
23. ht secondary display shows the total number of the stored data Press gt button to enable the SEND feature to export the data to the computer via USB or RS232 The software shows the data storing time and also the data value After the data transferring is completed the SEND feature will be disabled automatically Press or button to view additional stored reading Press and hold or to access quick recalling Press EXIT to exit recalling Using Send When using a Send feature please refer to the Installation Guide of the included CD ROM It is possible to use RS232 or USB interface cable to connect between computer and the Meter 47 Model UT804 OPERATING MANUAL Chapter 5 Changing the Default Setting Introduction The Meter allows you to change the default operating configuration of the Meter by changing setup options made at the factory These settings are stored and can be changed in the Setup mode using the procedure described in this chapter Selecting Setup Options To enter the Setup mode turn the Meter on and press the SETUP button It is recommended to change the default setting only when the Meter is at DCV measurement mode In the Setup mode each press of SETUP button steps to the next Selection Each press of or button decrement or increment an Option Each Setup Selection and Option appears in the primary display in the sequence shown in Table 5 1 48 Model UT804 OPERATING MANUAL Tabl
24. ications 57 Detailed Accuracy Specifications C 58 A DC Voltage o a ee RB B AC Voltage 59 CG DC Glrrent s 60 D AC Curent e lt et xu Ao Su re 61 E Resistance 62 F Continuity Test seei h E 606 6 6swixxnHU G Diode Test 2 H Capacitance 5 255252 552 5555555555555564 I Frequency eu J Duty Cycle ig K Temperature _ _ _ _ _ __ __ __ __ __ 85 1 1 Degrees Celsius 65 1 2 Fahrenheit 66 L 4 20mAloop current __ 2 67 Table 1 1 1 2 2 2 2 3 5 1 Model UT804 OPERATING MANUAL List of Tables Title Page Unpacking Inspection M International Electrical Symbols 10 Rotary Switch Selections 14 Functional Buttons Heer 15 Functions Vs Displays a a gt Display Features 21 Setup Selections 49 Model UT804 OPERATI
25. in the primary display UT804 gt Black Note 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 Figure 3 9 ACA Currents Measurement obtained When the measured current is lt 5 continuous measurement is allowed When the measured current is between gt 5A 10A continuous measurement lt 10 seconds and interval 1 Insert the red test lead into the 10A terminal and more than 15 minutes black test lead into the COM terminal When current measurement has been completed 2 Set the rotary switch to AN DC measurement is disconnect the connection between the testing default press SELECT button to select AC leads and the circuit under test and remove testing meas rement mode leads away from the input terminals of the Meter 34 To measure ACA current set up the Meter as Figure 3 9 and proceed as follows Model UT804 OPERATING MANUAL E Measuring Resistance B D g 0 4000 Tm Mer C Y Tava Figure 3 10 Resistance Measurement A Warning To avoid harms to you please do not attempt to input voltage higher than 60V DC or 30V AC To avoid possible damages to the Meter or to the devices under test disconnect circuit power and discharge a
26. leads and the circuit under test and remove testing leads away from the input terminals of the Meter 27 C Measuring DC Millivoltage UT804 Figure 3 3 DC Millivoltage Measurement A Warning To avoid harms to you or damages to the Meter from electric shock please do not attempt to measure voltages higher than 400mV although readings may be obtained 28 Model UT804 OPERATING MANUAL To measure DC Millivoltage Measurement set up the Meter as Figure 3 3 and do the following Insert the red test lead into the V terminal and the black test lead into the COM terminal 2 Set the rotary switch to mV Press the SELECT button cycles among mV zz frequency and duty cycle 3 Connect the test leads across with the object being measured The measured value shows on the display It displays the RMS Note When measuring DC Millivoltage the Meter acts around a 2 5GQ input impedance in parallel with the circuit Special care should be taken when measuring high voltage When voltage measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove testing leads away from the input terminals of the Meter Model UT804 OPERATING MANUAL D Measuring Currents DcyA range measurement 07804 Auto Range 120000 sep
27. ll the high voltage capacitors before measuring resistance To measure resistance set up the Meter as shown in Figure 3 10 and follow the following procedure 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 Qen gt 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 The SELECT button cycles among resistance continuity and diode 35 Note 36 When measuring low resistance the test leads can add 0 1 to 0 20 of error to resistance measurement To test the leads touch the probe tips together and read the resistance of the leads If necessary you can press REL A to automatically subtract this value For high resistance measurement gt 1 it is normal taking several seconds to obtain a stable reading In order to obtain precision readings use the test lead as short as possible The LCD displays OL indicating open circuit or the tested resistor value is higher than the maximum range of the Meter When testing the resistance signal from the calibrator itis necessary to press and hold the RANGE while turning on the Meter to change the maximum display to 4000 counts but the accuracy remains unchanged When resistance measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove te
28. odel UT804 OPERATING MANUAL A DC Voltage Range Resolution Accuracy Overload Protection Input Impedance 400mV 0 01mV 0 025 5 under Around 2 5GQ REL mode 4V 0 0001V 1000V 40V 0 001V 0 05 5 Around 10MQ 400V 0 01V 1000V 0 1V 0 1 8 58 Model UT804 OPERATING MANUAL B AC Voltage AC DC measurement is available Input Impedance Approx 10 Overload Protection 1000V Display Range Resolution Bandwidth Accuracy 4V 0 0001V 45Hz 1kHz 0 4 30 gt 1kHz 10kHz t 1 5 30 gt 10kHz 100kHz 6 30 40V 0 001V 45Hz 1kHz 0 4 30 gt 1kHz 10kHz 1 5 30 gt 10kHz 100kHz 6 30 400V 0 01V 45Hz 1kHz 0 4 30 gt 1kHz 10kHz 5 30 gt 10kHz 100kHz Not Specified 1000V 0 1V 45Hz 1kHz 1 30 gt 1kHz 5kHz t 5964 30 gt 5kHz 10kHz 10 30 Remarks a Truerms are valid from 10 of range to 100 of range b crest factor can be up to 3 0 except 1000V where it is 1 5 Model UT804 OPERATING MANUAL C A residual reading of 80 digits with test leads shorted will not affect stated accuracy d The accuracy guarantee range 10 100 e When making AC DC measurment the accuray need to add 1 35 digits of reading based on the above table C DC Current Range Resolution Bandwidth Accuracy 400uA 0 01 0 1 15 4000uA 0 1uA 40mA 0 001mA 0 15 15 0 5A
29. ollows DC electric level is zero When 10Hz 40MHz 200mV lt a lt 30Vrms When gt 40MHz Not specified 64 Model UT804 OPERATING MANUAL J Duty Cycle Range Resolution Accuracy Overload Protection 100 0 01 0 01 40 1000V Remarks Itis valid from 10 of range to 90 of range Input amplitude a as follows DC electric level is zero When 10Hz 40MHz 200mV lt lt 30Vrms When gt 40MHz Not specified K Temperature 1 1 Degrees Celsius Range Resolution Accuracy Overload Protection 40 C 40 C 396430 40 C 400 C 0 1 C 1 30 1000V 400 C 1000 C 2 5 65 Model UT804 OPERATING MANUAL 1 2 Fahrenheit Range Resolution Accuracy Overload Protection 40 F 32 F 4 50 32 F 752 F 0 1 1 596450 1000V 752 F 1832 F 3 Remarks Included is a K Type nickel chromium nickel silicon point contact temperature probe which could only measure temperature below 230 C If you want to measure temperature higher than 230 C you must use the rod contact temperature probe L 4 20 mA loop current Range Resolution Accuracy Overload Protection 0 5A 250V fast type fuse 4 20mA 0 01 1 50 o5x20mm Remarks When the readings obtained is 66 lt 4mA the primary display shows LO 4mA the primary display shows 0 gt 20mA the primary displa
30. onnection between the testing leads and the circuit under test and remove testing leads away from the input terminals of the Meter Model UT804 OPERATING MANUAL Model UT804 OPERATING MANUAL B Measuring AC Voltage UT804 i000 Figure 3 2 AC Voltage Measurement 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 AC voltage set up the Meter as Figure 3 2 and do the following Insert the red test lead into the V terminal and the black test lead into the COM terminal 2 Set the rotary switch to Y 3 Connect the test leads across with the object being measured 4 The measured value shows on the display It displays the True RMS value When a ACV function is selected you can press the AC DC button to view the AC DC True RMS value in the primary display To exit please EXIT button Note When measuring Y the Meter acts around a 10MQ input impedance in parallel with the circuit This loading effect can cause measurement errors in high impedance circuits In most cases the error is negligible 0 196 or less if the circuit impedance is 10kQ or less Special care should be taken when measuring high voltage When voltage measurement has been completed disconnect the connection between the testing
31. ons reading represents the True RMS total of AC and DC measurements 9 TrueRMS Indicator for True RMS value 21 Table 2 4 Display Features Model UT804 OPERATING MANUAL No Symbol Meaning 10 Q Ohm The unit of resistance kQ Kilohm 1x10 or 1000 ohms MO Megaohm 1 10 or 1 000 000 ohms Hz kHz MHz Hz Hertz The unit of frequency in cycles second kHz Kilohertz 1x10 or 1000 hertz MHz Megahertz 1x10 or 1 000 000 hertz V V Volts The unit of voltage mV Millivolt 1x10 or 0 001 volts mA A A Amperes amps The unit of current mA Milliamp 1x10 or 0 001 amperes 1 10 or 0 000001 amperes nF UF mF Farad The unit of capacitance nF Nanofarad 1x10 or 0 000000001 farads Microfarad 1x10 or 0 000001 farads mF Millifarad 1x10 or 0 001 farads 11 Automatic power off feature is 22 Model UT804 OPERATING MANUAL Table 2 4 Display Features No Symbol Meaning 12 1 Continuity test 13 STO Data store is on RCL Data recall is on 14 A The relative mode is on to display the present value minus the stored value 15 LOW The indicator for the lowest setup limit 16 AUTO The Meter is in the auto range mode in which the Meter automatically selects the range with the best resolution 17 SEND Data out
32. op reading of 0 5V to 0 8V however the reverse voltage drop reading can vary depending on the resistance of other pathways between the probe tips Connect the test leads to the proper terminals as said above to avoid error display TheLCD will display OL indicating either open circuit or wrong polarity connection Theunit of diode is volt V displaying the positive connection voltage drop value Open circuit voltage approximate 2 8V When diode testing has been completed disconnect the connection between the testing leads and the circuit under test and remove the test leads away from the input terminals 39 H Measuring Capacitance CN 4 Auto Range 0238 ba c om D D UE L um Qc True RMS Multimeter Black Figure 3 13 Capacitance Measurement 40 Model UT804 OPERATING MANUAL A Warning To ensure accuracy the Meter inside is discharged against the tested capacitor will be shown on the display when it is under discharging this process will be quite slow To avoid damage to the Meter or to the equipment under test disconnect circuit power and discharge all high voltage capacitors before measuring capacitance To measure capacitance set up the Meter as shown in Figure 3 13 and proceed as follows 1 Insert the red test lead into the
33. put is in progress 18 Backlight feature is 19 HOLD Data hold mode is active 20 PEAK HOLD Peak hold mode is active 21 gt Diode test 22 96 Frequency signal duty cycle 4 20mA loop current as reading 23 K OL The input value is too large for the selected range 24 Analogue Provides an analog indication of the present input quick response Bar Graph 23 Analogue Bar Graph The bar graph provides an analogue indication of the measured input For most measurement functions the bar graph updates 10 times per second Using MAX MIN The MAX MIN mode stores minimum MIN and maximum MAX input values When the input goes below the stored minimum value or above the stored maximum value the Meter beeps and stores the new value Press MAX MIN to enter MAX MIN mode The sampling time is every 2 seconds The maximum reading and MAX are shown on the upper right secondary display The minimum reading and MIN are shown on the lower right secondary display The primary display shows the current measurement reading To exit MAX MIN mode press EXIT Press HOLD to stop the Meter updating reading 24 Model UT804 OPERATING MANUAL MAX MIN mode can only be used under MANUAL ranging mode Under frequency and duty cycle measurement mode MAX MIN mode is invalid Model UT804 OPERATING MANUAL Introduction Chapter 3 explains how to make measurements Most measurement functions can be selected by
34. reading appears with the highest available resolution If AUTO is already on press RANGE to enter MANUAL ranging in the present range You can then select the next manual range each time you press RANGE Return to autoranging by press EXIT Press RANGE when turning on the Meter the Meter enters the analogue resistance signal measurement mode Understanding the Display Display features are shown in Figure 2 2 and described in Table 2 4 20 Model UT804 OPERATING MANUAL Figure 2 2 Display Features LIGHT Auto Range HOLD AC DC TrueRMSPeakA FC umVAnFMkQ Hz SEND HIH C STORE QW RECALL SET Gal Lt 1 1 gt C Dp p p 88885 H H H H TEEPE MULEHELLLELLHELHLELHEELE ELELLLLLEEL ELLE 15 o 12 o 02 o 32 o 4 Model UT804 OPERATING MANUAL Table 2 4 Display Features No Symbol Meaning MAX Maximum reading displayed MIN Minimum reading displayed 2 No The sequence of the reading 3 Degrees Celsius default or Fahrenheit 4 Hi mS H Hour u Micro m Minutes Milli S Second 5 Indicates negative reading 6 ta 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 7 SET Setup feature is on 8 AC DC For DCV and DCA functi
35. res are discarded Chapter 2 Getting Acquainted The automatic power off is preset to 10 minutes From the Setup menu see Chapter 5 you could specify a time 10 minutes 20 minutes 30 minutes or OFF If you set to OFF the Meter retains on until you turn the rotary switch to OFF or the battery becomes too weak Under AC operated situation the automatic power off feature is invalid Automatic Backlight Off Under battery operated situation AC Press and hold LIGHT button for around 1 second to turn the backlight on Press EXIT to exit the feature In Setup menu see Chapter 5 you could specify a time to automatically turn off the backlight 10 seconds 20 seconds 30 seconds or OFF If the period is set to OFF the backlight feature is disabled 11 Model UT804 OPERATING MANUAL Under AC operated situation the backlight is always on cannot turn off Low Baitery Indication A constant battery icon Ca in the middle left area of the display notifies you that the batteries are low and should be replaced UT804 AN Warning 752 2 Ang 4002 To avoid false readings which could lead to possible p 1000 electric shock or personal injury replace the battery EEEE C as soon as the battery icon 22 appears Aes Y x cHz v 1 64 The Meter Structure The Figure 2 1 shows the Meter structure 1 LCD Display 2 Function
36. ric 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 Inspect the test leads for damaged insulation or 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 or current as marked on the Meter between the Model UT804 OPERATING MANUAL 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 Must disconnect the connection between the test leads and the tested circuit before changing the measurement position of the rotary switch During measurement do not contact naked wire connector un used input terminal or the circuit in used When the Meter working at an effective voltage over 60V in DC or 30V 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 Do not use or store the Meter in an environment of high temperature h
37. s 07804 06238 7 True RMS Multimeter Figure 3 12 Diode Test 38 S Model UT804 OPERATING MANUAL A Warning To avoid harms to you please do not attempt to input voltages higher than 60V DC or 30V AC To avoid damages to the Meter or to the devices under test disconnect circuit power and discharge all the high voltage capacitors before testing diodes Use the diode test to check diodes transistors and other semiconductor devices The diode test sends a current through the semicondutor junction then measure the voltage drop across the junction A good silicon junction drops between 0 5V and 0 8V To test the diode out of a circuit set up the Meter as Figure 3 12 and proceed 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 9 and press button to select measurement mode 3 For forward voltage drop readings on any semiconductor component place the red test lead Model UT804 OPERATING MANUAL on the component s anode and place the black test lead on the component s cathode The red test lead polarity is while the black test lead polarity is The measured value shows on the display The SELECT button cycles among resistance continuity and diode Note Inacircuit a good diode should still produce forward voltage dr
38. s SEND gt Press EXIT to exit Setup feature Press the button In Setup press to select OFF at the selection of HIGH and once after entering Setup mode LOW Press to display max min and current measurement reading Press the button once Press EXIT to stop and return to current measurement mode In Setup each press to select the digit you want to edit Press the button once after entering Setup or Recall or Store mode Press to enter relative mode the primary display showsA The upper right secondary display shows the present measurement value The lower right secondary display shows the stored value The primary display shows the present measurement value minus the stored value Press EXIT to exit relative mode Press the button once 16 Model UT804 OPERATING MANUAL Table 2 2 Functional Buttons Button Description Access Method In Setup each press to decrement an Option Press the button once after In Recall each press to go back to the previous stored reading entering Setup or Recall or Store In Store each press to decrease a second on the storing mode interval Press EXIT to exit Hold feature Press the button once Press HOLD to freeze the displayed value Press EXIT to release the display In Setup each press to increment an Option Press the button once after In Recall each press to recall the next stored reading entering Setup or Recall or Store In
39. sting leads away from the input terminals Model UT804 OPERATING MANUAL Model UT804 OPERATING MANUAL F Testing for Continuity 4 0000174 HAWG True RMS Multimeter Figure 3 11 Continuity Test A Warning To avoid harms to you please do not attempt to input voltage higher than 60V DC or 30V AC 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 continuity To test for continuity set up the Meter as Figure 3 11 and do the following 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 X J press SELECT button to select measurement mode and connet the test leads across with the object being tested 3 The beeper comes on continuously for open conditions that is test resistance around 500 4 The display shows the tested resistance load value The unit is Q The SELECT button cycles among resistance continuity and diode Note Open circuit voltage around 1 2V and range is 400 measurement range When continuity testing has been completed disconnect the connection between the testing leads and the circuit under test and remove the test leads away from the input terminals 37 G Testing Diode
40. t Contact Temperature Probe It is 1 piece only suitable for measuring temperature under 230 C 4 Alligator Clip 1 piece 5 Test Clip 1 pair 6 USB interface cable 1 piece 7 RS232C interface cable 1 piece 8 CD ROM Installation Guide amp Computer Interface Software 1 piece 9 1 5V Battery R14 6 pieces 10 AC220V 50Hz Power Cable 1 piece In the event you find any missing or damage please contact your dealer immediately Safety Information This Meter complies with the standards IEC61010 safety measurement requirement in pollution degree 2 overvoltage category II 1000V CAT II 600V and double insulation CAT I Signal level special equipment or parts of equipment telecommunication electronic etc with smaller transient overvoltages than overvoltages CAT I CAT II Local level appliance PORTABLE EQUIPMENT etc with smaller transient voltage overvoltages than CAT 111 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 may pose hazards to the user or may damage the Meter or the equipment under test Model UT804 OPERATING MANUAL A Note identifies the information that user should pay attention to 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 elect
41. terminal and black test lead into the COM terminal Set the rotary switch to mA 22 DC measurement is default press SELECT button to select AC measurement mode Connect the test leads in serial with the object being measured The measured value shows on the display It displays the True RMS value When a ACV function is selected you can press the AC DC button to view the AC DC True RMS value in the primary display To exit please EXIT button Model UT804 OPERATING MANUAL DCA range measurement D 12710 000 M e 54 mm me Gan C Co C 7 Figure 3 8 DCA Currents Measurement To measure DCA current set up the Meter as Figure 3 8 and proceed as follows 1 Insert the red test lead into the 10A terminal and black test lead into the COM terminal 2 Set the rotary switch to 2 DC measurement is default or press SELECT bution to select DC measurement mode 3 Connect the test leads in serial with the object being measured The measured value shows on the display It displays the RMS 33 Model UT804 OPERATING MANUAL ACA range measurement 3 Connect the test leads in serial with the object being measured The measured value shows on the display It displays the True RMS value 4 When a ACV function is selected you can press the AC DC button to view the AC DC True RMS value
42. ttery will damage the Meter Under the influence of Radiated Radio Frequency Electromagnetic Field amp Conducted Radio Frequency Electromagnetic Field phenomenon the captioned model have a magnificent error in temperature measurement it will be back to normal when the interference is removed Model UT804 OPERATING MANUAL International Electrical Symbols Symbols used on the Meter and in this manual are explained in Table1 2 Table 1 2 International Electrical Symbols ACorDC DC Measurement AC Measurement Grounding A Warning Refer to the Operating Manual Deficiency of Built In Battery CE Conforms to Standards of European Union Model UT804 OPERATING MANUAL Turning the Meter On To turn the Meter on switch on the on ff switch at the back of the Meter Battery Considerations The Meter uses one 6pcs X 1 5V Battery R14 or AC200V 240V 50Hz The following paragraphs describe several techniques used to conserve battery power Automatic Power Off Under battery operated situation the display blanks and the Meter goes into a sleep mode if you have not changed the rotary switch position or pressed a button for a set period While in Sleep mode pressing the EXIT button or turning the rotary switch could turn the Meter on The Meter then returns to the display for the function selected with the rotary switch all previously activated button featu
43. umidity 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 and diodes Before measuring current check the Meter s fuses and turn off power to the circuit before connecting the Meter to the circuit When under battery operated situation replace the battery as soon as the battery indicator Ca appears With a low battery the Meter might produce false readings that can lead to electric shock and personal injury 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 9 10 and accident The Meter is suitable for indoor use When under battery operated situation turn the Meter off when it is not in use and take out the battery when not using for a long time When under battery operated situation constantly check the battery as it may leak when it has been using for some time replace the battery as soon as leaking appears A leaking ba
44. using the rotary switch While letters or symbols identify primary functions blue letters or symbols identify alternative functions Press the BLUE button to access these alternate functions A Measuring DC Voltage UT804 Gg 0 4000 C C Red SS Black Figure 3 1 DC Voltage Measurement Chapter 3 Making Measurement 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 voltage set up the Meter as Figure 3 1 and do the following 1 Insert the red test lead into the V 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 measured value shows on the display It displays the RMS 25 Note 26 When measuring 7 the Meter acts around a 10MQ input impedance in parallel with the circuit This loading effect can cause measurement errors in high impedance circuits In most cases the error high impedance circuits In most cases the error is negligible 0 1 or less if the circuit impedance is 10kQ or less Special care should be taken when measuring high voltage When voltage measurement has been completed disconnect the c
45. y shows 20 the primary display shows 100 Model UT804 OPERATING MANUAL kk END kk This operating manual is subject to change without notice 67 Model UT804 OPERATING MANUAL Copyright 2006 Uni Trend Group Limited All rights reserved Manufacturer Uni Trend Technology 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 Email info uni trend com http www uni trend com 68
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