Instrukcja obsługi EN
Contents
1. Operating temperature 0 C to 40 C Sampling Period 20s 20 DIGITAL MULTIMETER SPECIFICATION 3 2 10 Temperature 3 2 10 1 Temperature on sensor thermoresistor NTC and temperature display Range Resolution Accuracy 0 1 C 0 C to 40 C 2 C F 0 1 F 32 F to 104 F 4F Sampling Period 20s 3 2 10 2 Temperature on sensor thermocouple and main display Range Resolution Accuracy 20 C to 0 C 5 0 of reading or 3 C 1C to 400C 1 0 of reading or 2 C 400 C to 1000 C 2 0 of reading 4 F to 32 F 5 0 of reading or 6 F 1F 32 F to 752 F t 0 of reading or 4 752 F to 1832 F 2 0 of reading Overload protection resettable fuses F1 500mA 250V 3 2 11 Sound Level dB Range Resolution Accuracy 40 100dB 0 1 dB 3 5 dB at 94dB 1kHz sine wave Typical instrument frequency range 100 8000Hz DIGITAL MULTIMETER 21 SPECIFICATION 3 2 12 Luminance Lux Range Resolution Accuracy Lux 4000 1 Lux 5 0 of reading 10 digits x10Lux 10Lux at color temp 2856K calibrated to 40000 standard incandescent lamp Repeatability 2 3 2 13 Diode Test Range Resolution Function gt 1mV displaying approximate forward voltage of diode Forward DC current 1mA Reversed DC volta2. SELECT Button for switching among measuring functions RANGE Button for switching between auto and manual ranges Hz DUTY Button for switching between Hz and duty measurement REL Button for switching to relative measurement C F Button C F for switching between C and F Rotary Selector for selecting functions and ranges OFF Position for turning off the power 10A Input Jack for measuring current 0 10A Input Jack for measuring current 0 400mA and temperature V Q Hz MF Input Jack for measuring voltage resistance frequency duty capacitance diode and continuity COM Input Jack common input connection for current voltage resistance frequency duty capacitance diode continuity temperature measurement 9 DIGITAL MULTIMETER SAFETY INFORMATION Humidity Sensor for measuring humidity Light Sensor for measuring luminance Microphone for measuring sound level dB 2 3 LIQUID CRYSTAL DISPLAY LCD REL hFE 2 MkQV x10Lux 1 Temperature indicator 2 Humidity indicator 3 Main indicator 10 DIGITAL MULTIMETER SAFETY INFORMATION AC Alternating Current DC Direct Current v AC or DC alternating current or direct current gt t Diode 1 Continuity buzzer H Reading being held REL Relative measurement AUTO Auto range 1 Battery low C Celsius units Temperature F Fahrenheir units Temper
3. 4 DIGITAL MULTIMETER SAFETY INFORMATION 1 4 5 Use damp cloth and mild detergent to clean the meter do not use abrasives or solvents 1 4 6 Turn the rotary selector to OFF position to switch off the power when the meter is not in use 1 4 7 Remove the batteries to avoid damages to the meter if it will idle for a long time 5 DIGITAL MULTIMETER DESCRIPTION 2 DESCRIPTION This meter is a portable professional measuring instrument with large LCD to show three lines of readings as well as back light for easily reading The single hand operation design for the range switch makes measurement simple and easy Overload protection and low battery indication are provided It is an ideal multi function instrument with scores of practical applications for professional workshop school hobby and home use The meter is devised with light and sound alarm to prevent misconnection of test leads and provide additional protection against damages caused by improper operation The 5 in 1 digital multi tester has been designed to combine the functions of sound level luminance humidity and temperature meters as well as a digital multimeter The sound level function is applicable to measuring noise level in factories schools offices airports and at home and for checking the acoustics of studios auditoriums and hi fi installations The luminance function is applicable to measuring field luminance with full cosine correction
4. 200 750 500 1 500 43 OPERATING INSTRUCTION Appendix Conversion between luminance and light intensity E I r where E luminance unit Lux intensity of light source unit cd r distance between illuminant surface of light source and light detector unit m When making measurement the shortest distance between the illuminant surface of the light source and the light detector should be larger than 15 times of the maximum size of the illuminant surface of the light source or the light sensor 44 DIGITAL MULTIMETER MAINTENANCE 5 MAINTENANCE 5 1 REPLACING THE BATTERIES A WARNING To avoid electric shock make sure that the test leads have been clearly move away from the circuit under measurement before opening the battery cover of the meter 5 1 1 If the sign appears it means that the batteries should be replaced 5 1 2 Loosen the fixing screw of the battery cover and remove it 5 1 3 Replace the exhausted batteries with new ones 5 1 4 Put the battery cover back and fix it again to its origin form NOTE Do not reverse the poles of the batteries 5 2 REPLACING FUSE 5 2 1 Fuses rarely need replacement Almost all blows are the result of operation errors 5 2 2 Loosen the fixing screw of the battery cover and remove it 5 2 8 Replace the blown fuse with one at the specified rating 45 DIGITAL MULTIMETER MAINTENANCE 5 2 4 Put the battery cover back and
5. for angular incidence of light The humidity and temperature functions are suitable for 26 DIGITAL MULTIMETER SAFETY INFORMATION measuring ambient humidity and temperature as well as temperature of objects The digital multimeter can perform measurements of AC DC voltage and current resistance frequency duty capacitance as well as continuity and diode test Both the reading and unit of measurement are displayed on the LCD Both auto range and manual range are available This meter is equipped with auto power off function This meter is equipped with reading hold function This meter is equipped with relative measurement function 2 1 NAMES OF PARTS 1 LCD Liquid crystal display 2 Auto manual switch button RANGE 3 Relative measurement switch button REL 4 Reading hold back light button HOLD B L 5 Hz duty switch button Hz DUTY 6 Panel 7 Rotary selector 8 10A input jack 9 mA uA TEMP input jack 10 COM input jack 11 V Hz Pt input jack 7 DIGITAL MULTIMETER SAFETY INFORMATION OFF switch of power 12 13 Function switch button SELECT 14 C F switch button C F 15 Humidity amp Temperature sensor 16 Light sensor 17 Microphone 2 2 SWITCH BUTTONS AND INPUT JACKS HOLD B L Button for holding the reading or control backlight 28 DIGITAL MULTIMETER SAFETY INFORMATION
6. 3 A means the maximum current of the mA jack is 400mA and the maximum current of the 10A jack is 10A Atthe 10A jack current exceeding the limit will blow the fuse 34 DIGITAL MULTIMETER OPERATING INSTRUCTION 4 16 MEASURING RESISTANCE A WARNING Beware of Electrocution When measuring in circuit resistance make sure that the power of the circuit under test has been turned off and that all capacitors have been fully discharged 4 16 1 Plug the black test lead into the COM jack and the red test lead into the Q jack 4 16 2 Set the rotary selector to the gt t range position 4 16 3 Press the SELECT button to switch to measurement Then press the RANGE button to choose the auto range or manual range mode 4 16 4 Connect the test leads to the ends of the resistor or circuit for measurement 4 16 5 Take the reading on the main indicator of the LCD NOTE 1 At the manual range mode when only OL or OL is shown on the LCD it means the measurement has exceeded the range A higher range should be selected 2 When the input is open OL will appear on the LCD to indicate that the range has been exceeded 3 For measuring resistance above 1MQ it may take a few seconds to get a steady reading This is normal for high resistance reading 35 DIGITAL MULTIMETER OPERATING INSTRUCTION 4 17 MEASURING CAPACITANCE A WARNING Beware of Electrocution To avoid electric shock make sure that
7. 4 11 1 Plug the black test lead into the COM jack and the red test lead into the V jack 4 11 2 Set the rotary selector to the wv range position 4 11 3 Press the SELECT button to switch to AC measurement Then press the RANGE button to choose the auto range or manual range mode 4 11 4 Connect the test leads to the voltage source or load terminals for measurement 4 11 5 Take the reading on the main indicator of the LCD 30 DIGITAL MULTIMETER OPERATING INSTRUCTION NOTE 1 At small voltage range unsteady readings may appear before the test leads contact the circuit This is normal because the meter is highly sensitive When the test leads contact the circuit the true reading will be shown 2 At the manual range mode when only OL or OL is shown on the LCD it means the measurement has exceeded the range A higher range should be selected 3 At the manual range mode when the scale of the value to be measured is unknown beforehand select the highest range first and lower the range gradually 4 12 MEASURING FREQUENCY 4 12 1 Plug the black test lead into the COM jack and the red test lead into the Hz jack 4 12 2 Set the rotary selector to the Hz range position or press the Hz DUTY button at the AC DC V range to Switch to Hz measurement 4 12 3 Connect test leads to the two ends of the source or load for measurement 4 12 4 Take the reading on the main indicator of the LCD 31 DIGIT
8. AL MULTIMETER OPERATING INSTRUCTION 4 13 MEASURING DUTY 4 13 1 Plug the black test lead into the COM jack and the red test lead into the Hz jack 4 13 2 Set the rotary selector to the Hz range position 4 13 3 Press the Hz DUTY button to switch to DUTY measurement or press the Hz DUTY button at the AC DC V range to switch to DUTY measurement 4 13 4 Connect test leads to the two end of the source or load for measurement 4 13 5 Take the reading on the main display of the LCD 4 14 MEASURING DC CURRENT ZX WARNING Beware of Electrocution Turn off the power of the circuit to be measured before connecting the meter to the circuit 4 14 1 Plug the black test lead into the COM jack When the current to be measured is under 400mA plug the red test lead into the mA jack when the current to be measured is over 400mA but under 10A plug the red test lead into the 10A jack 4 14 2 Set the rotary selector to the A range position 4 14 3 Press the SELECT button to switch to DC measurement Then press the RANGE button to choose the auto range or manual range mode 235 DIGITAL MULTIMETER OPERATING INSTRUCTION 4 14 4 Connect the test leads to the circuit for measurement 4 14 5 Take the reading on the main indicator of the LCD The polarity symbol denotes the polarity of the end connected by the red test lead NOTE 1 At the manual range mode when only OL or OL is shown on the LCD it m
9. CONTENTS 1 SAFETY INFORMATION x 1 1 PRELIMINARY E 1 2 DOSAND DON TS 2 1 3 SYMBOLS 8 1 4 MAINTENANCE 4 DIGITAL MULTIMETER 2 DESCRIPTION 24 NAMES PARTS uy 2 2 SWITCH BUTTONS AND INPUT JACKS 8 2 3 LIQUID CRYSTAL DISPLAY LCD PETS 3 SPECIFICATIONS E 3 11 GENERAL SPECIFICATIONS 12 32 TECHNICAL SPECIFICATIONS Ja OPERATION MANUAL 4 OPERATION INSTRUCTION 23 41 MISCONNECTION ALARM 23 42 HOLDING READINGS 24 43 SWITCHING FUNCTIONS 24 44 SWITCHING RANGES 24 4 5 SWITCHING BETWEEN FREQUENCY DUTY 25 4 6 SWITCHING TO RELATIVE MEASUREMENT 1125 47 BACK LIGHT 26 4 8 AUTO POWER OFF uy 4 9 PREPARING FOR MEASUREMENT 28 DIGITAL MULTIMETER DIGITAL MULTIMETER CONTENTS CONTENTS 4 10 MEASURING DC VOLTAGE 29 1 SAFETY INFORMATION 4 11 MEASURING AC VOLTAGE 2 30 WARNING 4 12 MEASURING FREQUENCY i91 BE EXTREMELY CAREFUL WHEN USING THIS 4 43 MEASURING DUTY 32 METER Improper use of this device can result in 4 14 MEASURING DC CURRENT 32 electric shock or destruction of the meter Take all normal safety precautions and follow the safeguards 4 15 MEASURING AC CURRENT 33 ua suggested in this manual 4 16 MERSURINGIRESISTANGE ion To exploit full functionality of the meter and ensure 4 17 MEASURING CAPACITANCE 36 safe operation please read carefully and follow the 4 48 TESTING DIODE 96 directions in this manual 4 49 TESTING CONTINUITY 37 This meter complies with the general technic
10. MULTIMETER SPECIFICATION 3 1 18 Operating temperature 0 C to 40 C 32 F to 104 F 3 1 19 Storage temperature 10 C to 50 C 10 F to 122 F 3 1 20 Dimension 195x92x55mm 3 1 21 Weight approximate 400g including batteries 3 2 TECHNICAL SPECIFICATIONS Ambient temperature 23 5 C Relative humidity lt 75 3 2 1 DC Voltage Range Resolution Accuracy 400mV 0 1mV 4V 1mV 40V 10mV t 0 796 of reading 2 digits 400V 100mV 1000V 1V Input Impedance 10MQ Overload protection 400mV range 250V DC or rms AC 4V 1000V ranges 1000V DC or 750V rms AC Max input voltage 1000V DC or 750V rms AC NOTE At small voltage range unsteady readings will appear before the test leads contact the circuit This is normal because the meter is highly sensitive When the test leads contact the circuit the true reading will be shown 13 DIGITAL MULTIMETER SPECIFICATION 3 2 2 AC Voltage Range Resolution Accuracy 400mV 0 1mV 4V 1mV 0 8 of reading 3 digits 40V 10mV 400V 100mV 750V 1V 1 096 of reading 3 digits Input Impedance 10MQ Overload protection 400mV range 250V DC or rms AC 4V 750V ranges 1000V DC or rms 750V AC Max input voltage 1000V DC or rms 750V AC Frequency range 40 to 400Hz Response average calibrated in rms of sine wave NOTE At small voltage range unsteady readings will appear before the test leads co
11. RATING INSTRUCTION At the same time the lights at the 10A and COM jacks will flash to remind the user to plug in the test leads there 4 1 4 At dB and Lux range whether the test leads are plugged in or otherwise the meter will make no response because no signal input is required from the input terminals 4 2 HOLDING READINGS 1 PPress the HOLD B L button to hold the readings while taking measurement and the value on the display will be held 2 Press the HOLD B L button again to release the READING HOLD function 4 3 SWITCHING FUNCTIONS 1 Press the SELECT button to switch between AC and DC measurement at the current and voltage ranges 2 Press the SELECT button to switch among resistance diode and continuity ranges 4 4 SWITCHING RANGES 1 When the meter is turned on it is at the auto range mode for measuring current voltage and resistance 2 Press the RANGE button for manual range mode The range will go up one level at each press and return 24 DIGITAL MULTIMETER OPERATING INSTRUCTION to the lowest level when the highest level is reached 3 2 Press the RANGE button for two or more seconds to return to the auto range 4 5 SWITCHING BETWEEN FREQUENCY DUTY 1 2 Press the Hz DUTY button at the frequency range to Switch between frequency and duty measurement 2 When the meter is at the voltage and current ranges press the Hz DUTY button to measure the frequency of the voltage or cur
12. TIMETER SPECIFICATION 3 2 5 Resistance Range Resolution Accuracy 4000 0 10 4kQ 19 40kQ 109 1 2 of reading 2 digits 400k 1000 4M 1kQ 40M 10kQ 2 0 of reading 5 digits Open circuit voltage 0 25V Overload protection 250V DC or rms AC 3 2 6 Capacitance Range Resolution Accuracy 40nF 10pF 400nF 0 1nF 4uF 1nF 3 0 of reading 3 digits 40uF 10nF 100uF 100nF Overload protection 250V DC or rms AC DIGITAL MULTIMETER SPECIFICATION 3 2 7 Frequency Range Resolution Accuracy 9 999Hz 0 001Hz X 2 0 of reading 5 digits 99 99Hz 0 01Hz 999 9Hz 0 1Hz X 1 5 of reading 5 digits 9 999kHz 1Hz 99 99kHz 10Hz 199 9kHz 100Hz X 2 0 of reading 5 digits gt 200kHz for reference only by Hz range Measurement range 0 200kHz Input voltage range 0 5V 10V rms AC higher input voltage at higher frequency Overload protection 250V DC or rms AC by V range Measurement range 0 40kHz Input voltage range 0 5V 750V rms AC higher input voltage at higher frequency Input Impedance 10MQ Max input voltage 1000V DC or 750V rms AC by mAorA range Measurement range 0 40kHz Input current range 2 1 4 range rms AC higher input voltage at higher frequency 18 DIGITAL MULTIMETER SPECIFICATION Max input current mA jack pA ranges 2 4mA mA jack mA ra
13. al requirements 4 20 MEASURING RELATIVE HUMIDITY 98 for the GB T 19978 92 multimeter as well as the safety 4 21 MEASURING TEMPERATURE 39 requirements for GB4793 1 1995 IEC 1010 1 1990 WITH THERMO RESISTOR concerning electronic measuring instruments with pollution 4 22 MEASURING TEMPERATURE 40 degree 2 and overvoltage at SAT II CAT III 600V WITH THERMOCOUPLE Follow all safety and operation instructions to ensure safe use of the meter 4 23 MEASURING SOUND LEVEL dB 41 I zm With proper use and care this digital multimeter will give you 4 24 MEASURING LUMINANCE 41 years of satisfactory service 5 MAINTENANCE 45 5 1 REPLACING THE BATTERIES 45 1 1 PRELIMINARY 5 2 REPLACING FUSE 45 1 1 1 When using the meter the user must observe all 5 8 REPLACING TEST LEADS 47 normal safety rules concerning 6 ACCESSORIES 48 1 general protection against electric shock 2 protection of the meter against misuse ss DIGITAL MULTIMETER DIGITAL MULTIMETER SAFETY INFORMATION SAFETY INFORMATION 1 1 2 When the meter is delivered check whether it has been damaged in transit 1 1 3 After being stored and delivered under harsh conditions the meter should be checked and confirmed whether any damages have been incurred 1 1 4 Test leads must be kept in good condition Check whether the insulation on test leads has been damaged and any wire has been exposed 1 1 5 Use the test leads supplied to ensure operation safety If req
14. ature RH Relative Humidity units F Farad Capacitance Q Ohms Resistance V Volts Voltage A Amperes Current Hz Hertz Frequency 96 Duty Cycle dB Decibel Lux Illuminance units X10 Decuple n m k M Unit of measure prefixes nano micro milli kilo and mega siis DIGITAL MULTIMETER SPECIFICATION 3 SPECIFICATIONS Calibration is required once a year to be carried out at a temperature between 18 C and 28 C 64 F to 82 F and relative humidity below 75 3 1 GENERAL SPECIFICATIONS 3 1 1 The meter is devised with light and sound alarm to prevent test leads misconnection 3 1 2 Auto range and manual range options are available 3 1 3 Overrange protection is provided for all ranges 3 1 4 Maximum voltage between terminals and earth ground 1000V DC or rms AC 3 1 5 Operating altitude max 2000 meters 7000 ft 3 1 6 Display LCD 3 readings at the same time 3 1 7 Maximum value display 3999 digits 3 1 8 Polarity indication automatic for negative polarity 3 1 9 Overrange indication OL or OL 3 1 10 Sampling time approx 0 4 second per sample 3 1 11 Unit indication function and unit 3 1 12 Auto power off time 30 min 3 1 13 Specification of resettable fuse F1 500mA 250V 3 1 14 Fuse protection F2 10A 250V quick acting 3 1 15 Operating power 1 5Vx3 AAA batteries 3 1 16 Battery low indication 2 on LCD 3 1 17 Temperature factor lt 0 1xAccuracy of De DIGITAL
15. eans the measurement has exceeded the range A higher range should be selected 2 At the manual range mode when the scale of the value to be measured is unknown beforehand set the range to the highest 3 ZX means the maximum current of the mA jack is 400mA and the maximum current of the 10A jack is 10A Atthe 10A jack current exceeding the limit will blow the fuse 4 15 MEASURING AC CURRENT A WARNING Beware of Electrocution Turn off the power of the circuit to be measured before connecting the meter to the circuit 4 15 1 Plug the black test lead into the COM jack When the current to be measured is under 400mA plug the red test lead into the mA jack when the current to be measured is over 400mA but under 104A plug the red 33 DIGITAL MULTIMETER OPERATING INSTRUCTION test lead into the 10A jack 4 15 2 Set the rotary selector to the A range position 4 15 3 Press the SELECT button to switch to AC measurement Then press the RANGE button to choose the auto range or manual range mode 4 15 4 Connect the test leads to the circuit for measurement 4 15 5 Take the reading on the main indicator of the LCD NOTE 1 At the manual range mode when only OL or is shown on the LCD it means the measurement has exceeded the range A higher range should be selected 2 Under the manual range mode when the scale of the value to be measured is unknown beforehand set the range to the highest
16. estroy the internal circuit although a higher voltage can be shown 4 10 1 Plug the black test lead into the COM jack and the red test lead into the V jack 4 10 2 Set the rotary selector to the AW range position 4 10 3 Press the SELECT button to switch to DC measurement Then press the RANGE button to choose the auto range or manual range mode 4 10 4 Connect the test leads to the voltage source or load for measurement 4 10 5 Take the reading on the main indicator of the LCD The polarity symbol denotes the polarity of the end connected by the red test lead NOTE 1 At small voltage range unsteady readings will appear before the test leads contact the circuit This is normal because the meter is highly sensitive When the test leads contact the circuit the true reading will be shown 29 DIGITAL MULTIMETER OPERATING INSTRUCTION 2 Under the manual range mode when only OL or OL is shown on the LCD it means the measurement has exceeded the range A higher range should be selected 3 Under the manual range mode when the scale of the value to be measured is unknown beforehand select the highest range first and lower the range gradually 4 11 MEASURING AC VOLTAGE A WARNING Beware of Electrocution Pay special attention to avoid electric shock when measuring high voltage Do not input any voltage 750V rms AC which may destroy the inner circuit although a higher voltage can be shown
17. fix it again to its original form WARNING To avoid electric shock make sure that the test leads have been clearly move away from the circuit under measurement before opening the battery cover of the meter For protection against fire hazard replace fuses with specified ratings only F 10A 250V quick acting 46 DIGITAL MULTIMETER MAINTENANCE 5 3 REPLACING TEST LEADS WARNING The replacement must be test leads in good working condition with the same or equivalent rating 1000V 10A A test lead must be replaced if the insulation layer has been damaged e g the wire inside is exposed 47 DIGITAL MULTIMETER ACCESSORIES 6 ACCESSORIES 1 Test leads electric rating 1000V 10A 1 pair set 2 Thermocouple K type TP01 1 set 3 Operation Manual 1 copy 48
18. ge 1 5V Overload Protection 250V DC or rms AC 3 2 14 Continuity Test Range Function 20 Built in buzzer will sound if resistance is lower than 400 Open circuit voltage 0 5V Overload Protection 250V DC or rms AC 22 DIGITAL MULTIMETER OPERATING INSTRUCTION 4 OPERATING INSTRUCTION 4 1 MISCONNECTION ALARM The input jacks of the meter are equipped with sound and light alarms against misconnection of test leads 4 1 1 At V Q Hz Duty MF F ranges 1 2 The red lights at the IN and COM jacks will be off after the test leads are plugged in 2 The buzzer will sound upon misconnection of the test leads in the mA or 10A jacks to warn the user At the same time the lights at the IN and COM jacks will flash to remind the user to plug in the test leads there 4 1 2 At uA mA TEMP ranges 1 2 The red lights at the mA and COM jacks will be off after the test leads are plugged in 2 The buzzer will sound upon misconnection of the test leads in the IN or 10 jacks to warn the user At the same time the red lights at the mA and COM jacks will flash to remind the user to plug in the test leads there 4 1 3 At 10A range 1 The red lights at the 10A and COM jacks will be off after the test leads are plugged in 2 The buzzer will sound upon misconnection of the test leads in the IN or mA jacks to warn the user 23 DIGITAL MULTIMETER OPE
19. ght is not being used 4 8 AUTO POWER OFF 1 If there is no any operation within any thirty minute period after the power is on the meter will enter the auto power off mode 2972 DIGITAL MULTIMETER OPERATING INSTRUCTION 2 Turn the rotary selector or press of the HOLD B L SELECT RANGE Hz DUTY or REL button to resume operation of the meter under auto the power off mode 3 Press the SELECT button to disable the auto power off function 4 9 PREPARATING FOR MEASUREMENT 4 9 1 Switch on the power by turning the rotary selector If the battery voltage is lower than 3 6V the 5 symbol will appear and the batteries should be replaced 4 9 2 The symbol beside the input lead shows that the input voltage or current should not exceed the specified value in order to protect the internal circuit from damage 4 9 3 Turn the rotary selector to the required function and range to be measured Under the manual mode choose the highest range when the value scale to be measured is unknown 4 9 4 Connect the common test lead first and then the charged test lead when making connection Take away the charged test lead first when disconnecting 28 DIGITAL MULTIMETER OPERATING INSTRUCTION 4 10 MEASURING DC VOLTAGE WARNING Beware of electrocution Pay special attention to avoid electric shock when measuring high voltage Do not input any voltage over 1000V DC which may d
20. idity changes 38 DIGITAL MULTIMETER OPERATING INSTRUCTION 4 21 MEASURING TEMPERATURE WITH THERMO RESISTOR 4 21 1 This function is used for measuring the ambient temperature around the meter 4 21 2 Turn the rotary selector away from the OFF position 4 21 3 The current ambient temperature will be shown on the temperature indicator of the LCD 4 21 4 Press the C F button to switch between C and F measurement NOTE 1 The temperature sensor thermo resistor is placed inside the front part of the meter and therefore it may take a longer time to reach thermal balance with the environment Furthermore it takes longer intermission time about 20 seconds for sampling and the meter has to be exposed to the environment for a longer time for accurate reading Hence it is not suitable for measuring rapidly changing ambient temperature 2 The working temperature of the meter is 0 40 C As the temperature sensor is placed inside the meter this function is applicable for measuring ambient temperature between 0 and 40 C 3 If exposed to an environment beyond 0 40 C the meter may show a wider range of temperature measurement but the accuracy cannot be ensured and damage to the meter may be caused 39 DIGITAL MULTIMETER OPERATING INSTRUCTION 4 22 MEASURING TEMPERATURE WITH THERMOCOUPLE A WARNING Beware of electrocution To avoid electrical shock do not connect the thermocouples to charged circu
21. ill disappear 7 OL triggering Under the REL mode OL over limit will flash on the display if the input value exceeds the allowed value for that range Press the REL button again to cancel the relative measurement function The REL mode cannot be entered when OL is flashing 4 7 BACK LIGHT 1 2 Press the HOLD B L button for two or more seconds to switch on the back light if the light in the environment is too dim for taking reading 2 Press the HOLD B L button for two or more seconds 26 DIGITAL MULTIMETER OPERATING INSTRUCTION again to switch off the back light 3 The back light will go off automatically after 10 seconds NOTE 1 LED which requires a larger working current is the main source of back light Although the meter is equipped with a timer set at 10 seconds i e the back light will be off automatically after 10 seconds frequent use of the back light will shorten the life of the batteries Therefore do not use the back light unless necessary 2 When the battery voltage is lt 3 6V the symbol 29 C battery low will appear on the LCD When the back light is on even if the batter is 23 6V the may appear because of its large working current which will cause the voltage to drop The accuracy of the measurement cannot be assured when the symbol appears In this case you need not replace the batteries yet Normally the batteries can last until the appears when the back li
22. its 4 22 1 Turn the rotary selector to TEMP position 4 22 2 OL will appear on the main display of the LCD at this time 4 22 3 Plug the red end of the type thermocouple into the TEMP jack and black end into the COM jack Touch the surface of the object or area with the temperature sensor for measurement 4 22 4 Press the C F button to choose C or F measurement 4 22 5 Take the reading on the main indicator of the LCD NOTE The cold end compensation circuit used for measuring temperature is placed inside the front part of the meter It may take a longer time to reach thermal balance with the environment Therefore the meter should be exposed to the environment for a longer time for accurate reading 40 DIGITAL MULTIMETER OPERATING INSTRUCTION 4 23 MEASURING SOUND LEVEL dB A WARNING To avoid damage to the meter do not connect the input plug to any electric signal 4 23 1 Turn the rotary selector to the dB range position 4 23 2 Point the sensor located in the front part of the meter at the sound source 4 23 3 The sound level in dB will be shown on the LCD NOTE Strong wind over 10m sec striking on the microphone may cause misreading for measurement in windy locations A windscreen should be placed in front of the microphone in such circumstances 4 24 MEASURING LUMINANCE A WARNING To avoid damage to the meter do not connect the input plug to any electric signal 4 24 1 Turn the rotar
23. malities or faults are observed 1 2 14 Do not use the meter unless its rear case is securely fastened in its original position 1 2 15 Do not store or use the meter in areas exposed to direct sunlight at high temperature or with high relative humidity 1 3 SYMBOLS A important safety information refer to the operation manual A dangerous voltage may be present 3 DIGITAL MULTIMETER SAFETY INFORMATION 8 double insulation Protection class II CAT Il overvoltage installation category Il pollution degree 2 per IEC1010 1 referring to the level of impulse withstand voltage protection provided CAT Ill overvoltage installation category 111 pollution degree 2 per IEC1010 1 referring to the level of impulse withstand voltage protection provided C conforms to European Union Directive Lm earth ground fuse battery low 1 4 MAINTENANCE 1 4 1 Do not attempt to remove the rear case to adjust or repair the meter Such actions should only be performed by a technician who fully understands the meter and the danger involved 1 4 2 Disconnect the test leads from all sources of electric current before opening the battery cover of the mete 1 4 3 To avoid any electric shock caused by error readings replace the batteries immediately when the sign appears on the display 1 4 4 To avoid fire hazards the replacement fuse must meet the specified voltage and current at F 10A 250V quick acting
24. nges 400mA 10A jack 10A Overload Protection mA ranges resettable fuses F1 500mA 250V 10A range F2 10A 250V fuse quick acting NOTE When measuring frequency the range by Hz range is larger than that by the Hz of voltage range or current range but the value measured beyond the range is for reference only 3 2 8 Duty Range Resolution Accuracy 0 1 99 9 0 196 3 0 Hz range Frequency response 0 200kHz Input voltage range 0 5V 10V rms AC higher input voltage at higher frequency Overload protection 250V DC or rms AC higher input voltage at higher frequency By V range Frequency response 0 40kHz Input voltage range 0 5V 600V rms AC higher input voltage at higher frequency 19 DIGITAL MULTIMETER SPECIFICATION Input Impedance 10MQ Max Input Voltage 1000V DC or 750V rms AC By pA mA or A range Frequency response 0 40kHz Input current range 21 4 of the rms AC for the range higher input voltage at higher frequency Max input current mA jack pA ranges 2 4mA mA jack mA ranges 400mA 10A jack 10A Overload protection uA mA ranges resettable fuses F1 500mA 250V 10 range F2 10A 250V fuse quick acting NOTE The range by DUTY of the Hz range is larger than that of the voltage range or current range 3 2 9 Relative Humidity on RH and humidity display gt Range Resolution Accuracy 5 096 RH 20 95 0 1
25. ntact the circuit This is normal because the meter is highly sensitive When the test leads contact the circuit the true reading will be shown sas DIGITAL MULTIMETER SPECIFICATION 3 2 3 DC Current Range Resolution Accuracy 400uA 0 1uA 4000uA 19A 40mA 10 1 2 of reading 3 digits 400mA 100 4 1 10 10mA 2 0 of reading 10 digits Overload protection uA mA ranges resettable fuses F1 500mA 250V 10A range F2 10A 250V fuse quick acting Max input current mA jack uA ranges 2 4mA mA jack mA ranges 400mA 10A jack 10A voltage drop 400HA ranges 40mV 4000 ranges 400mV 40mA ranges 40mV 400mA ranges 400mV 4A range 40mV 10A range 100Mv 15 DIGITAL MULTIMETER SPECIFICATION 3 2 4 AC Current Range Resolution Accuracy 400uA 0 1uA 4000u A 1uA 40mA 10H A 1 5 of reading 5 digits 400mA 100 4 1 10 10mA 3 0 of reading 10 digits Overload protection uA mA ranges resettable fuses F1 500mA 250V 10 range F2 10A 250V fuse quick acting Max input current mA jack pA ranges 2 4mA mA jack mA ranges 400mA 10A jack 10A voltage drop 400p A ranges 40mV 4000uA ranges 400mV 40mA ranges 40mV 400mA ranges 400mV 4A range 40mV 10A range 100mV Frequency range 40 to 400Hz Response average calibrated in rms of sine wave 16 DIGITAL MUL
26. ors have been fully discharged before testing the continuity of a circuit 4 19 1 Plug the black test lead into the COM jack and the red test lead into the Q jack 4 19 2 Set the rotary selector to the range position 4 19 3 Press the SELECT button to switch to for continuity test 4 19 4 Connect the test leads to the two ends of the circuit for measurement 4 19 5 If the resistance of the circuit being tested is less than 409 the built in buzzer will sound 237 DIGITAL MULTIMETER OPERATING INSTRUCTION 4 19 6 Read the resistance on the main indicator of the LCD NOTE If the test leads are open or the resistance of the circuit is over 4000 OL will appear on the LCD 4 20 MEASURING RELATIVE HUMIDITY 4 20 1 This function is used for measuring the ambient humidity around the meter 4 20 2 Turn the rotary selector away from the OFF position 4 20 3 The current ambient humidity will be shown on the humidity display of the LCD NOTE 1 Y he humidity sensor is placed inside the front part of the meter and therefore it may take a longer time to reach balance with the environment being measured Furthermore it takes a longer intermission time about 20 seconds for sampling and the meter has to be exposed to the environment for a longer time for accurate reading Hence it is not suitable for measuring rapidly changing ambient humidity 2 It will take some time for a steady RH reading when the ambient hum
27. rent signal Another press on the Hz DUTY button will change into the Duty range for measuring the duty cycle of the voltage or current signal 3 2 Press the Hz DUTY again to resume the meter to voltage and current measurement at the manual range mode 4 6 SWITCHING TO RELATIVE MEASUREMENT 1 Press the REL button to enter the relative measurement mode when taking measurements The initial reading will resume zero 2 Atthe relative measurement mode the existing reading will be stored in the memory as reference value for later measurements The displayed reading is the difference between the input value and reference value i e REL present reading input value reference value 25 DIGITAL MULTIMETER OPERATING INSTRUCTION 3 The meter will enter the manual range mode after the REL button is pressed REL mode is not available for Hz Duty range because it is an automatic range 4 Press the REL button again to cancel the relative measurement function 5 Pressing the REL button at the HOLD mode will cancel the HOLD function The actual measurement value taken will be stored in the memory as reference value The readings displayed for measurements taken afterwards will be the difference between the input value and the reference value 6 Press the RANGE SELECT buttons or turning the rotary selector to cancel the relative measurement function and resume normal measurement The REL symbol on the display w
28. the capacitors have been fully discharged before measuring the capacitance of a capacitor 4 17 1 Plug the black test lead into the COM jack and the red test lead into the AF jack 4 17 2 Set the rotary selector to the range position 4 17 3 After fully discharged the capacitor connect the test leads to the two ends of the capacitor for measurement 4 17 4 Take the reading on the main indicator of the LCD NOTE 1 It may take some time about 30 seconds for the 200uF range for steady readings when measuring high capacity 2 Sometimes a reading may appear when the circuit is open In such case press the REL button to reset the reading and take measurement again 4 18 TESTING DIODE 4 18 1 Plug the black test lead into the COM jack and the red test lead into the Ptjack 4 18 2 Set the rotary selector to the range position 36 DIGITAL MULTIMETER OPERATING INSTRUCTION 4 18 3 Press the SELECT button to switch to test 4 18 4 Connect the red test lead to the anode and the black test lead to the cathode of the diode for testing 4 18 5 Take the reading on the main indicator of the LCD NOTE 1 The meter will show the approximate forward voltage drop of the diode 2 When the test leads have been reversed or open OL will appear on the LCD 4 19 TESTING CONTINUITY A WARNING Beware of Electrocution Make sure that the power of the circuit has been turned off and the capacit
29. uired they must be replaced with test leads of the same model or class 1 2 DOS AND DON TS 1 2 1 Use the right input jack function and range 1 2 2 Do not take measurements that exceed the protection limit values indicated in the specifications 1 2 3 Do not touch the metal tips of the test leads when the meter is connected to the circuit to be measured 1 2 4 Keep your fingers behind the probe barriers when taking a measurement with an effective voltage above 60V DC or 30V rms AC 1 2 5 Do not take voltage measurement if the value between the terminals and earth ground exceeds 1000V 1 2 6 Select the highest range if the value scale to be measured in the manual range is unknown 2 DIGITAL MULTIMETER SAFETY INFORMATION 1 2 7 Do not connect the meter to any voltage source while the rotary selector is in the current resistance capacitance diode continuity range 1 2 8 Disconnect the test leads from the circuit under test before turning the rotary selector to change functions 1 2 9 Be careful that high voltage pulses at test points may damage the meter when measurements are being taken on the circuit of TV switch power 1 2 10 Do not measure the resistance capacitance diode or continuity of live circuits 1 2 11 Do not take capacitance measurements until the capacitor to be measured has been fully discharged 1 2 12 Do not use the meter near explosive gases steam or dirt 1 2 13 Stop using the meter if any abnor
30. y selector to the Lux x10Lux range position 4 24 2 Point the sensor located in the front part of the meter at the light source 4 24 3 The luminance in Lux will be shown on the LCD ze DIGITAL MULTIMETER OPERATING INSTRUCTION NOTE 1 When only OL appears on the LCD it means over range and a higher range should be selected 2 Spectral sensitivity characteristic 100 8 5 60 a 8 40 g 20 400 500 600 700 800 900 1000 Wave Length 3 Recommended luminance Location Lux Home wardrobe bedroom lavatory 70 150 staircase corridor 70 150 living room study toilet kitchen 200 750 writing working 500 1000 handicraft dressmaking work 750 2000 Office conference room reception room 200 750 42 DIGITAL MULTIMETER OPERATING INSTRUCTION clerical work typing Factory packing passage assembly line inspection work electronic parts assembly line Hotel public places washroom reception front desk Shop staircase corridor display window packing bench shop window Hospital ward warehouse medical examination room operation theatre A amp E ward School auditorium indoor gymnasium classroom laboratory library DIGITAL MULTIMETER 700 1 500 1000 2 000 150 300 300 750 750 1 500 1 500 3 000 100 200 200 1 000 150 200 750 1 500 1 500 3 000 100 200 300 750 750 1 500 100 300
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