User`s Guide True RMS Industrial Multimeter Extech EX520
Contents
1. e Inspect the condition of the test leads and the meter itself for any damage before operating the meter e Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC These voltages are considered a shock hazard e Warning This is a class A equipment This equipment can cause interferences in the living quarters in this case the operator can be required to carry out adequate measures e Always discharge capacitors and remove power from the device under test before performing Diode Resistance or Continuity tests e Voltage checks on electrical outlets can be difficult and misleading because of the uncertainty of connection to the recessed electrical contacts Other means should be used to ensure that the terminals are not live e If the equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired e This device is not a toy and must not reach children s hands It contains hazardous objects as well as small parts that the children could swallow In case a child swallows any of them please contact a physician immediately e Do not leave batteries and packing material lying around unattended they can be dangerous for children if they use them as toys e Incase the device is going to be unused for an extended period of time remove the batteries to prevent them from draining e Expired or damaged batteries can cause cauterization on contact2. 20 C to 60 C Max 80 up to 87 F 31 C decreasing linearly to 50 at 104 F 40 C lt 80 7000ft 2000meters maximum 0 753lb 342g includes holster 7 36 x 3 2 x 2 0 187 x 81 x 50mm includes holster This meter is intended for origin of installation use and protected against the users by double insulation per EN61010 1 and 1EC61010 1 2 Edition 2001 to Category IV 600V and Category 111 1000V Pollution Degree 2 The meter also meets UL 61010 1 2 Edition 2004 CAN CSA C22 2 No 61010 1 2 Edition 2004 and UL 61010B 2 031 1 Edition 2003 UL CE The UL mark does not indicate that this product has been evaluated for the accuracy of its readings Copyright 2008 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form www extech com 15 EX520 EU ENG V2 3 1 08
3. place and fastened securely NOTE If your meter does not work properly check the fuses and batteries to make sure that they are still good and that they are properly inserted W UVA VU V VA REPLACING THE FUSES WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the fuse cover 1 Disconnect the test leads from the meter 2 Remove the protective rubber holster 3 Remove the battery cover two B screws and the battery 4 Remove the six A screws securing the rear cover 5 Gently remove the old fuse and install the new fuse into the holder 6 Always use a fuse of the proper size and value 0 8A 1000V fast blow for the 600mA range SIBA 70 172 40 10A 1000V fast blow for the 20A range SIBA 50 199 06 7 Replace and secure the rear cover battery and battery cover WARNING To avoid electric shock do not operate your meter until the fuse cover is in place and fastened securely 12 EX520 EU ENG V2 3 1 08 Specifications Function Range Resolution Accuracy DC Voltage 600mV 0 1mV 6v 0 001V 60V 0 01V 0 09 reading 2 digits 600V 0 1V 1000V 1V AC Voltage 50 to 60Hz 40Hz to 1KHz 6v 0 001V SUN d 1 0 reading 3 dgts 2 0 reading 3 dgts 600V 0 1V 1000V 1V All AC voltage ranges are specified from 5 of range to 100 of range DC Current 600uA 0 1 A 6000uA 1A RUA SA 1 0 reading 3
4. DUTY CYCLE MEASUREMENTS CAUTION Do not make 20A current measurements for longer than 30 seconds Exceeding 30 seconds may cause damage to the meter and or the test leads 1 Insert black test lead banana plug into the negative COM jack 6 Remove power from the circuit under test then open up the 8 9 For current measurements up to 6000pA AC set the function Switch to the yellow pA position and insert the red test lead banana plug into the pA mA jack For current measurements up to 600mA AC set the function Switch to the yellow mA position and insert the red test lead banana plug into the pA mA jack For current measurements up to 20A AC set the function switch to the yellow 10A HZ position and insert the red test lead banana plug into the 10A jack Press the MODE button to indicate AC on the display circuit at the point where you wish to measure current Touch the black test probe tip to the neutral side of the circuit Touch the red test probe tip to the hot side of the circuit Apply power to the circuit Read the current in the display 10 Press the Hz button to indicate Hz 11 Read the frequency in the display 12 Press the Hz button again to indicate 96 13 Read the duty cycle in the display 14 Press the Hz button to return to current measurement 7 EX520 EU ENG V2 3 1 08 RESISTANCE MEASUREMENTS WARNING To avoid electric shock d
5. digits 600mA 0 1mA 6A 0 001A 10A 0 01A 20A 30 sec max with reduced accuracy AC Current 40Hz to 1kHz 600pA 0 1pA 6000uA 1uA 60mA 0 01mA 600mA 0 1mA 6A 0 001A 10A 0 01A 1 5 reading 3 digits 20A 30 sec max with reduced accuracy All AC voltage ranges are specified from 5 of range to 100 of range NOTE Accuracy is stated at 65 F to 83 F 18 C to 28 C and less than 75 RH 13 EX520 EU ENG V2 3 1 08 Function Range Resolution Accuracy Resistance 6000 0 10 6kQ 0 001kQ 60kQ 0 01kQ 0 3 reading 4 digits 600kQ 0 1kQ 6MQ 0 001MQ 40MQ 0 01MQ 0 3 reading 20 digits Capacitance 60nF 0 01nF 600nF 0 1nF 6uF 0 001uF 3 5 reading 4 digits 60uF 0 01uF 600uF 0 1uF 1000u4F 1uF 5 reading 5 digits Frequency 9 999Hz 0 001Hz electronic 99 99Hz 0 01Hz 999 9Hz 0 1Hz ae 0 1 reading 1 digits 99 99kHz 0 01kHz 999 9kHz 0 1kHz 9 999MHz 0 001MHz 40MHz 0 01MHz Sensitivity 0 8V rms min 20 to 80 duty cycle and 100kHz 5Vrms min 20 to 80 duty cycle and gt 100kHz Frequency 10 00 400Hz 0 01Hz 0 5 reading electrical Sensitivity 15Vrms Duty Cycle 0 1 to 99 9 0 1 1 2 reading 2 digits Pulse width 100us 100ms Frequency 5Hz to 150kHz Temp 50 to 1382 F 1 F 3 0 reading 5 C 9 F type K 45 to 750 C 1 C probe accuracy not included Note Accur
6. test lead banana plug into the positive V jack 3 Press the MODE button to indicate nF on the display 4 Touch the test leads to the capacitor to be tested 5 The test may take up to 3 minutes or more for large capacitors to charge Wait until the readings settle before ending the test 6 Read the capacitance value in the display FREQUENCY DUTY CYCLE MEASUREMENTS ELECTRONIC 1 Set the rotary function switch to the green Hz 9 position 2 Press the Hz button to indicate Hz in the display 3 Insert the black lead banana plug into the negative COM jack and the red test lead banana plug into the positive Hz jack 4 Touch the test probe tips to the circuit under test 5 Read the frequency on the display 6 Press the Hz button again to indicate 96 on the display 7 Read the of duty cycle on the display 9 EX520 EU ENG V2 3 1 08 AUTORANGING MANUAL RANGE SELECTION When the meter is first turned on it automatically goes into Autoranging This automatically selects the best range for the measurements being made and is generally the best mode for most measurements For measurement situations requiring that a range be manually selected perform the following 1 Press the RANGE key The AUTO display indicator will turn off 2 Press the RANGE key to step through available ranges until you select the desired range 3 To exit the Manua
7. to the hot side of the circuit 4 Read the voltage in the display 5 Press the HZ button to indicate Hz 6 Read the frequency in the display 7 Press the Hz button again to indicate 96 8 Read the of duty cycle in the display 6 EX520 EU ENG V2 3 1 08 DC CURRENT MEASUREMENTS CAUTION Do not make 20A current measurements for longer than 30 seconds Exceeding 30 seconds may cause damage to the meter and or the test leads 1 Insert black test lead banana plug into the negative COM jack 2 For current measurements up to 6000pA DC set the function Switch to the yellow pA position and insert the red test lead banana plug into the pA mA jack 3 For current measurements up to 600mA DC set the function Switch to the yellow mA position and insert the red test lead banana plug into the pA mA jack 4 For current measurements up to 20A DC set the function switch to the yellow 10A HZ position and insert the red test lead banana plug into the 10A jack 5 Press the MODE button to indicate DC on the display 6 Remove power from the circuit under test then open up the circuit at the point where you wish to measure current Bc 7 Touch the black test probe tip to the negative side of the circuit Touch the red test probe tip to the positive side of the circuit 8 Apply power to the circuit 9 Read the current in the display AC CURRENT FREQUENCY
8. with the skin Always therefore use suitable hand gloves in such cases e See that the batteries are not short circuited Do not throw batteries into the fire 3 EX520 EU ENG V2 3 1 08 SAFETY INSTRUCTIONS This meter has been designed for safe use but must be operated with caution The rules listed below must be carefully followed for safe operation 1 NEVER apply voltage or current to the meter that exceeds the specified maximum Input Protection Limits Function Maximum Input VDCorVAC 1000VDC AC rms mA AC DC 800mA 1000V fast acting fuse 10A 1000V fast acting fuse 20A for 30 seconds max every 15 minutes 1000VDC AC rms AAC DC Frequency Resistance Capacitance Diode Test Continuity Temperature 1000VDC AC rms 2 USE EXTREME CAUTION when working with high voltages 3 DO NOT measure voltage if the voltage on the COM input jack exceeds 600V above earth ground 4 NEVER connect the meter leads across a voltage source while the function switch is in the current resistance or diode mode Doing so can damage the meter 5 ALWAYS discharge filter capacitors in power supplies and disconnect the power when making resistance or diode tests 6 ALWAYS turn off the power and disconnect the test leads before opening the covers to replace the fuse or batteries 7 NEVER operate the meter unless the back cover and the battery and fuse covers are in place and fastened securely 8
9. Change to a higher range DC VOLTAGE MEASUREMENTS CAUTION Do not measure DC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function switch to the green VDC position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive V jack 3 Touch the black test probe tip to the negative side of the circuit Touch the red test probe tip to the positive side of the circuit 4 Read the voltage in the display AC VOLTAGE FREQUENCY DUTY CYCLE MEASUREMENTS WARNING Risk of Electrocution The probe tips may not be long enough to contact the live parts inside some 240V outlets for appliances because the contacts are recessed deep in the outlets As a result the reading may show 0 volts when the outlet actually has voltage on it Make sure the probe tips are touching the metal contacts inside the outlet before assuming that no voltage is present CAUTION Do not measure AC voltages if a motor on the circuit is being switched ON or OFF Large voltage surges may occur that can damage the meter 1 Set the function switch to the green VAC Hz position 2 Insert the black test lead banana plug into the negative COM jack Insert red test lead banana plug into the positive V jack 3 Touch the black test probe tip to the neutral side of the circuit Touch the red test probe tip
10. Dropping it can damage the electronic parts or the case KEEP THE METER CLEAN Wipe the case occasionally with a damp cloth DO NOT use chemicals cleaning solvents or detergents USE ONLY FRESH BATTERIES OF THE RECOMMENDED SIZE AND TYPE Remove old or weak batteries so they do not leak and damage the unit IF THE METER IS TO BE STORED FOR A LONG PERIOD OF TIME the batteries should be removed to prevent damage to the unit BATTERY INSTALLATION WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the battery cover 1 2 8 4 Turn power off and disconnect the test leads from the meter Open the rear battery cover by removing two screws B using a Phillips head screwdriver Insert the battery into battery holder observing the correct polarity Put the battery cover back in place Secure with the screws You as the end user are legally bound Battery ordinance to return all used batteries and accumulators disposal in the household garbage is prohibited You can hand over your used batteries accumulators gratuitously at the collection points for our branches in your community or wherever batteries accumulators are sold Disposal Follow the valid legal stipulations in respect of the disposal of the device at the end of its lifecycle 11 EX520 EU ENG V2 3 1 08 WARNING To avoid electric shock do not operate the meter until the battery cover is in
11. Ifthe equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired 4 EX520 EU ENG V2 3 1 08 Controls and Jacks 6 000 count LCD 2 RANGE button 3 Hz and button 1 ple hs plis AARDE 4 Mode button 2 50 ux 0 Ds 5 Function switch ER 11 3 6 mA pA and 10A input jacks 10 4 7 COM input jack 8 Positive input jack 9 HOLD and Backlight button 5 10 RELATIVE button 3 11 MAX MIN button 7 Note Tilt stand and battery compartment are on rear of unit Symbols and Annunciators Auto power off AUTO MAX MIN HOLD REL a e Continuity D Pt X Diode test U E E AE E Battery status Mio n nano 10 capacitance u micro 10 amps cap Hz m milli 10 volts amps RPM A Amps E k kio 10 ohms E F Farads capacitance M mega 10 ohms Q Ohms Hz Hertz frequency V Volts 96 Percent duty ratio REL Relative AC Alternating current AUTO Autoranging DC Direct current HOLD Display hold SE Degrees Fahrenheit C Degrees Centigrade MAX Maximum MIN Minimum 5 EX520 EU ENG V2 3 1 08 Operating Instructions WARNING Risk of electrocution High voltage circuits both AC and DC are very dangerous and should be measured with great care 1 ALWAYS turn the function switch to the OFF position when the meter is not in use 2 If OL appears in the display during a measurement the value exceeds the range you have selected
12. User s Guide EXTECH INSTRUMENTS A FLIR COMPANY True RMS Industrial Multimeter Extech EX520 AUTO MAX MIN HOLD REL gt pc UP S UD e cr AC unF mVA Gm GB uo A Dra a a RPM True RMS Industrial MultiMeter CE Introduction Congratulations on your purchase of the Extech EX520 True RMS Autoranging Multimeter This meter measures AC DC Voltage AC DC Current Resistance Capacitance Frequency electrical amp electronic Diode Test and Continuity plus Thermocouple Temperature It features a rugged design for heavy duty use Proper use and care of this meter will provide many years of reliable service Safety This symbol adjacent to another symbol terminal or operating device indicates that the operator must refer to an explanation in the Operating Instructions to avoid personal injury or damage to the meter This WARNING symbol indicates a potentially hazardous situation which if not avoided could result in death or serious injury CAUTION This CAUTION symbol indicates a potentially hazardous situation which if not avoided may result damage to the product ji This symbol advises the user that the terminal s so marked must not be connected to a circuit point at which the voltage with respect to earth ground exceeds in this case 1000 VAC or VDC mm ss This symbol adjacent to one or more terminals identifies them as being associated with ranges that may in normal use
13. acy specifications consist of two elements e reading This is the accuracy of the measurement circuit e digits This is the accuracy of the analog to digital converter 14 EX520 EU ENG V2 3 1 08 Enclosure Shock Drop Test Diode Test Continuity Check Temperature Sensor Input Impedance AC Response ACV Bandwidth Crest Factor Display Overrange indication Auto Power Off Polarity Measurement Rate Low Battery Indication Battery Fuses Operating Temperature Storage Temperature Operating Humidity Storage Humidity Operating Altitude Weight Size Safety Approvals UL Listed Double molded waterproof IP67 6 5 feet 2 meters Test current of 0 9mA maximum open circuit voltage 2 8V DC typical Audible signal will sound if the resistance is less than 1000 approx test current 0 35mA Requires type K thermocouple gt 10MQ VDC amp gt 10MQ VAC True rms 40Hz to 1kHz S3 at full scale up to 500V decreasing linearly to 1 5 at 1000V 6 000 count backlit liquid crystal with bargraph OL is displayed 15 minutes approximately with disable feature Automatic no indication for positive Minus sign for negative 2 times per second nominal is displayed if battery voltage drops below operating voltage One 9 volt NEDA 1604 battery mA pA ranges 0 8A 1000V ceramic fast blow A range 10A 1000V ceramic fast blow 41 F to 104 F 5 C to 40 C 4 F to 140 F
14. be subjected to particularly hazardous voltages For maximum safety the meter and its test leads should not be handled when these terminals are energized This symbol indicates that a device is protected throughout by double insulation or reinforced insulation Sw PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY Equipment of OVERVOLTAGE CATEGORY is equipment for connection to circuits in which measures are taken to limit the transient overvoltages to an appropriate low level Note Examples include protected electronic circuits OVERVOLTAGE CATEGORY II Equipment of OVERVOLTAGE CATEGORY Il is energy consuming equipment to be supplied from the fixed installation Note Examples include household office and laboratory appliances OVERVOLTAGE CATEGORY III Equipment of OVERVOLTAGE CATEGORY III is equipment in fixed installations Note Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation OVERVOLTAGE CATEGORY IV Equipment of OVERVOLTAGE CATEGORY IV is for use at the origin of the installation Note Examples include electricity meters and primary over current protection equipment 2 EX520 EU ENG V2 3 1 08 CAUTIONS e Improper use of this meter can cause damage shock injury or death Read and understand this user manual before operating the meter e Always remove the test leads before replacing the battery or fuses
15. ess the MODE button to indicate and V on the display 4 Touch the test probes to the diode under test Forward voltage will typically indicate 0 400 to 0 700V Reverse voltage will indicate OL Shorted devices will indicate near OV and an open device will indicate OL in both polarities 8 EX520 EU ENG V2 3 1 08 TEMPERATURE MEASUREMENTS 1 Set the function switch to the green Temp position 2 Insert the Temperature Probe into the input jacks making sure to observe the correct polarity 3 Press the MODE button to indicate F or C 4 Touch the Temperature Probe head to the part whose temperature you wish to measure Keep the probe touching the part under test until the reading stabilizes about 30 seconds E Note The temperature probe is fitted with a type K mini connector A mini connector to banana connector adaptor is supplied for connection to the input banana jacks Note The temperature range of the supplied thermocouple probe is 20 to 250 C 4 to 482 F 5 Read the temperature in the display CAPACITANCE MEASUREMENTS WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any capacitance measurements Remove the batteries and unplug the line cords 1 Set the rotary function switch to the green Q CAP position 2 Insert the black test lead banana plug into the negative COM jack Insert the red
16. isconnect power to the unit under test and discharge all capacitors before taking any resistance measurements Remove the batteries and unplug the line cords 1 Set the function switch to the green Q CAP9 3 position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive Q jack 3 Press the MODE button to indicate O on the display 4 Touch the test probe tips across the circuit or part under test It is best to disconnect one side of the part under test so the rest of the circuit will not interfere with the resistance reading 5 Read the resistance in the display CONTINUITY CHECK WARNING To avoid electric shock never measure continuity on circuits or wires that have voltage on them 1 Set the function switch to the green Q CAP position 2 Insert the black lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive Q jack 3 Press the MODE button to indicate and Q on the display 4 Touch the test probe tips to the circuit or wire you wish to check 5 If the resistance is less than approximately 35Q the audible signal will sound If the circuit is open the display will indicate OL DIODE TEST 1 Set the function switch to the green Q CAP 2 position 2 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack 3 Pr
17. l Ranging mode and return to Autoranging press and hold the RANGE key for 2 seconds Note Manual ranging does not apply for the Capacitance and Frequency functions MAX MIN Note When using the MAX MIN function in Autoranging mode the meter will lock into the range that is displayed on the LCD when MAX MIN is activated If a MAX Min reading exceeds that range an OL will be displayed Select the desired range BEFORE entering MAX MIN mode 1 Press the MAX MIN key to activate the MAX MIN recording mode The display icon MAX will appear The meter will display and hold the maximum reading and will update only when a new max occurs 2 Press the MAX MIN key again and the display icon MIN will appear The meter will display and hold the minimum reading and will update only when a new min occurs 3 To exit MAX MIN mode press and hold the MAX MIN key for 2 seconds RELATIVE MODE The relative measurement feature allows you to make measurements relative to a stored reference value A reference voltage current etc can be stored and measurements made in comparison to that value The displayed value is the difference between the reference value and the measured value 1 Perform the measurement as described in the operating instructions 2 Press the REL button to store the reading in the display and the REL indicator will appear on the display 3 The display will now indicate the difference between the stored value a
18. nd the measured value 4 Press the REL button to exit the relative mode Note The Relative function does not operate in the Frequency function DISPLAY BACKLIGHT Press the HOLD key for gt 1 second to turn on or off the display backlight function The backlight will automatically turn off after 10 seconds HOLD The hold function freezes the reading in the display Press the HOLD key momentarily to activate or to exit the HOLD function AUTO POWER OFF The auto off feature will turn the meter off after 15 minutes To disable the auto power off feature hold down the MODE button and turn the meter on LOW BATTERY INDICATION m ci will appear in the lower left conner of the display when the battery voltage becomes low Replace the battery when this appears 10 EX520 EU ENG V2 3 1 08 Maintenance WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the back cover or the battery or fuse covers WARNING To avoid electric shock do not operate your meter until the battery and fuse covers are in place and fastened securely This MultiMeter is designed to provide years of dependable service if the following care instructions are performed 1 2 KEEP THE METER DRY If it gets wet wipe it off USE AND STORE THE METER IN NORMAL TEMPERATURES Temperature extremes can shorten the life of the electronic parts and distort or melt plastic parts HANDLE THE METER GENTLY AND CAREFULLY
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