Oparation Manual for EX411
Contents
1. ech and go to Service Department RA number A Return Authorization RA number must be issued before iS responsible for shipping charges nce and proper packaging to prevent damage in transit This warranty the user such as misuse improper proper maintenance or repair or modification Extech specifically disclaims any implied warranties or and will not be liable for any direct ech s total liability is limited to repair orth above is inclusive and no other Repair Returns Ext 210 Email repair extech com Website www extech com 2 a Support Hotline 781 890 7440 Tech support Ext 200 Email support extech com Copyright 2003 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 18 V01 01 01 5 042. test leads from any source of voltage before removing the battery cover 1 When the battery becomes exhausted or drops below the operating voltage The symbol will appear in the LCD display when the battery check button is pressed The battery should be replaced 2 Remove the two screws B securing the rear battery cover lift the cover off and replace the battery 3 Replace and secure the battery cover 4 Properly dispose of the old battery WARNING To avoid electric shock do not operate your meter until the battery cover is in place and fastened securely a M 16 V01 01 01 5 04 REPLACING THE FUSES WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the fuse cover Disconnect the test leads from the meter Remove the protective rubber holster Remove the battery cover two B screws and the battery Remove the four A screws securing the rear cover Lift the center circuit board straight up from the connectors to gain access to the fuse holders Gently remove the old fuse and install the new fuse into the holder Always use a fuse of the proper size and value 0 2A 250V fast blow for the 200mA range 20A 250V fast blow for the 20A range Align the center board with the connectors and gently press into place 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 i
3. 2000 count LCD 0 9 digits 15 minutes approximately 1 is displayed Automatic no indication for positive polarity Minus sign for negative polarity 2 times per second nominal D is displayed if battery voltage drops below operating voltage One 9 volt NEDA 1604 battery mA pA ranges 0 2A 250V fast blow A range 20A 250V ceramic fast blow 41 F to 104 F 5 C to 40 C 4 F to 140 F 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 753Ib 342g includes holster 7 36 x 3 2 x 2 0 187 x 81 x 50mm includes holster For indoor use and in accordance with the requirements for double insulation to IEC1010 1 1995 EN61010 1 1995 Overvoltage Category III 600V and Category Il 1000V Pollution Degree 2 6 V01 01 01 5 04 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 f 1 appears in the display during a measurement the value exceeds the range you have selected Change to a higher range NOTE On some low AC and DC voltage ranges with the test leads not connected to a device the display may show a random changing reading This is normal and is caused by the high input sensitivity The reading will sta
4. 3 0 reading 6 digits 8 digits See See rei reading 3 digits 20A 0 01A 2 5 reading 3 digits AC Current 50 to 400Hz 400Hz to 1kHz A AC 200mA 0 1mA 1 896 reading 2 5 reading True rms 8 digits 10 digits 20A 0 01A 3 0 reading 3 5 reading 8 digits 10 digits Resistance 2000 10 10 0 8 reading 4 digits 20000 10 0 8 reading 2 digits es ae 1 0 reading 2 digits 20MQ_ 0 01MQ 2 0 reading 5 digits Temperature 4to 1 F d e 1382 F 3 0 reading 3 digits meter only probe accuracy not 20 to f C included 750 C NOTE Accuracy 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 NOTE Accuracy is stated at 65 F to 83 F 18 C to 28 C and less than 75 RH V01 01 01 5 04 Specifications Diode Test Continuity Check Input Impedance AC Response ACV Bandwidth DCA voltage drop Display Auto Power Off Overrange indication Polarity Measurement Rate Low Battery Indication Battery Fuses Operating Temperature Storage Temperature Operating Humidity Storage Humidity Operating Altitude Weight Size Safety Test current of 1mA maximum open circuit voltage 2 8V DC typical Audible signal will sound if the resistance is less than approximately 1500 10MQ True rms 50Hz to 1kHz 200mV 3 digit
5. COM jack Insert the red test lead banana plug into the positive Q jack 3 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 4 Readthe resistance in the display and then set the function switch to the lowest position that is greater than the actual or any anticipated resistance Resistance f 11 V01 01 01 5 04 CONTINUITY CHECK WARNING To avoid electric shock never measure continuity on 1 Set the function switch to the pt 5j 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 Touch the test probe tips to the circuit or wire you wish to check 4 Ifthe resistance is less than approximately 1500 the audible signal will sound If the circuit is open the display will indicate 1 DIODE TEST 1 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive diode jack 2 Turn the rotary switch to the 9 position 3 Touch the test probes to the diode under test Forward bias will typically indicate 400 to 1000 Reverse bias will indicate 1 Shorted devices will indicate near 0 and the continuity beeper will sound An open device will indicate 1 in both polarities 12 V01 01 01 5 04 TEM
6. PERATURE MEASUREMENTS 1 2 Set the function switch to the TEMP position Insert the Temperature Probe into the Temperature Socket making sure to observe the correct polarity Press the F or C button for the desired units 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 Read the temperature in the display 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 13 V01 01 01 5 04 DISPLAY BACKLIGHT Press and hold the i button to turn on the display backlight function The backlight will automatically turn off after 15 seconds BATTERY CHECK The CHECK function tests the condition of the 9V battery Set the function switch to the 200VDC range and press the CHECK button If the reading is less than 8 5 battery replacement is recommended 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 LOW BATTERY INDICATION If the e icon appears in the display the battery voltage is low and the battery should be replaced WRONG CONNECTION INDICATION The ETS icon will appear in the upper right conner of the display and the buzzer wil
7. User s Guide EXTECH LI CINSTRUMENTS True RMS Multimeter Extech 411 Introduction Congratulations on your purchase of the Extech 411 part number EX411 True RMS Multimeter This meter measures AC DC Voltage AC DC Current Resistance Diode Test and Continuity plus Thermocouple Temperature 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 WARNING 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 MAX This symbol advises the user that the 600V 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 600 VAC or VDC This symbol adjacent to one or more terminals identifies them as being associated with ranges that may in normal use 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 dou
8. bilize and give a proper measurement when connected to a circuit 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 Setthe function switch to the highest V DC position 2 Insert the black test lead banana plug into the negative COM jack a Insert the red test lead banana LS S 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 Reset the function switch to successively lower V DC positions to obtain a higher resolution reading If the polarity is reversed the display will show minus before the value DC Voltage 7 V01 01 01 5 04 AC VOLTAGE 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 Setthe function switch to the hi
9. ble insulation or reinforced insulation 2 V01 01 01 5 04 OVERVOLTAGE CATEGORY III This meter meets the IEC 610 1 95 standard for OVERVOLTAGE CATEGORY III Cat III meters are protected against overvoltage transients in fixed installation at the distribution level Examples include switches in the fixed installation and some equipment for industrial use with permanent connection to the fixed installation 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 VAC 750V DC AC V DC or VAC 1000V DC AC 200Vrms on 200mV range mA DC 200mA 250V fast acting fuse ADC 20A 250V fast acting fuse 30 seconds max every 15 minutes Ohms Continuity 250Vrms for 15sec max 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 openin
10. e circuit 7T Apply power to the circuit 8 Read the current in the display Current DC mA amp uA 9 V01 01 01 5 04 AC CURRENT MEASUREMENTS CAUTION Do not make current measurements on the 20A scale for longer than 30 seconds Exceeding 30 seconds may cause damage to the meter and or the test leads 1 Insert the black test lead banana plug into the negative COM jack 2 For current measurements up to 200mA AC set the function switch to the highest 200mA AC position and insert the red test lead banana plug into the mA jack 3 For current measurements up to 20A AC set the function Switch to the 20A AC range and insert the red test lead eoe banana plug into the 20A dmg jack CH 4 Remove power from the acad EE circuit under test then open up the circuit at the point where you wish to measure current 5 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 6 Apply power to the circuit 7 Read the current in the display AC Source AC Amps 10 V01 01 01 5 04 RESISTANCE MEASUREMENTS WARNING To avoid electric shock disconnect power to the unit under test and discharge all capacitors before taking any resistance measurements Remove the battery and unplug the line cords 1 Setthe function switch to the highest position 2 Insert the black test lead banana plug into the negative
11. g the covers to replace the fuse or battery 7 NEVER operate the meter unless the back cover and the battery cover is in place and fastened securely 3 V01 01 01 5 04 Controls and Jacks Rubber holster 2000 count LCD display Degrees F button Degrees C button Function switch mA uA and A input jacks COM input jack Positive input jack Battery check button 10 Hold button 11 Backlight button Em Job On Ka Note Tilt stand and battery compartment are on rear of unit Symbols and Annunciators Continuity AUTO IRTEMP HOLDREL gt Diode test A ME QUE UE VE cr z Battery status d fiz 3x Test lead connection um e Le Ze ve error B T micro 10 amps d Il lj l Iz m milli 10 volts amps NRBIS k kilo 10 ohms M mega 10 ohms Q Ohms A Amps V Volts AC Alternating current AUTO Autoranging DC Direct current HOLD Display hold F Degrees Fahrenheit PC Degrees Centigrade 4 V01 01 01 5 04 Specifications Function Range Resolution Accuracy DC Voltage 200mV 0 1mV_ 0 3 reading 2 digits VDE Py SON 0 5 reading 2 digits 1000V IN 0 8 reading 2 digits AC Voltage 50 to 400Hz 400Hz to 1kHz V AC 2V 0 001V 1 0 reading 2 0 reading True rms 6 digits 8 digits 200V 0 1V 1 5 reading 2 5 reading 6 digits 8 digits 750V 1V 2 0 reading
12. ghest V AC N 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 to the hot side of the circuit 4 Read the voltage in the display Reset the function switch to successively lower V AC positions to obtain a higher resolution reading Voltage 8 V01 01 01 5 04 DC CURRENT MEASUREMENTS CAUTION Do not make current measurements on the 20A scale for longer than 30 seconds Exceeding 30 seconds may cause damage to the meter and or the test leads 1 Insert the black test lead banana plug into the negative COM jack 2 For current measurements up to 200pA DC set the function Switch to the 200uUA DC ZZ position and insert the red test lead banana plug into the uA mA jack 3 For current measurements up to 200mA DC set the function Switch to the 200mA DC position and insert the red test lead banana plug into the uA mA jack 4 For current measurements up to 20A DC set the function Switch to the 20A DC range and insert the red test lead banana plug into the 20A jack 5 Remove power from the circuit under test then open up the circuit at the point where you wish to measure current 6 Touch the black test probe tip to the negative side of the circuit Touch the red test probe tip to the positive side of th
13. l sound whenever the positive test lead is inserted into the 20A or uA mA input jack and a non current green function is selected If this occurs turn the meter off and reinsert the test lead into the proper input jack for the function selected 14 V01 01 01 5 04 Maintenance WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the back cover or the battery cover 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 KEEP THE METER DRY If it gets wet wipe it off 2 USE AND STORE THE METER IN NORMAL TEMPERATURES Temperature extremes can shorten the life of the electronic parts and distort or melt plastic parts 3 HANDLE THE METER GENTLY AND CAREFULLY Dropping it can damage the electronic parts or the case 4 KEEP THE METER CLEAN Wipe the case occasionally with a damp cloth DO NOT use chemicals cleaning solvents or detergents 5 USE ONLY FRESH BATTERY OF THE RECOMMENDED SIZE AND TYPE Remove old or weak battery so they do not leak and damage the unit 6 IF THE METER IS TO BE STORED FOR A LONG PERIOD OF TIME the battery should be removed to prevent damage to the unit 15 V01 01 01 5 04 REPLACING THE BATTERY WARNING To avoid electric shock disconnect the
14. n place and fastened securely UL LISTED The UL mark does not indicate that this product has been evaluated for the accuracy of its readings H PON gt 9o e SS o 17 V01 01 01 5 04 Warranty EXTECH INS defects in pa limited warran return the ins TRUMENTS CORPORATION wan rts and workmanship for one year ty applies on sensors and cables rument for service during or beyo Customer Service Department at 781 890 7440 website at www extech com click on Contact Ex to request an any product is returned to Extech The sender freight insura does not app wiring opera unauthorized y to defects resulting from action o jon outside of specification im merchantabili or fitness for a specific purpose indirect incidental or consequential damages Ex or replacement of the product The warranty set warranty whether written or oral is expressed or implied Calibration and Repair Services Extech offers complete repair and calibration services for the products we sell For periodic calibration NIST certification or repair of an Extech product call customer service for details on services available for that product Extech recommends that calibration be performed on an annual basis to ensure calibration integrity rants this instrument to be free of Tom date of shipment a six month If it should become necessary to nd the warranty period contact the ext 210 for authorization or visit our
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