User`s Guide True RMS Multimeter Extech 411
Contents
1. 7 NEVER operate the meter unless the back cover and the battery cover is in place and fastened securely 4 EX411 en GB_v4 3 4 15 Controls and Jacks CON OV Ne 9 10 11 Note Tilt stand and battery compartment are on rear of unit Rubber holster 2000 count LCD display F button C button Function switch mA UA and A input jacks COM input jack Positive input jack Battery check button Hold button Backlight button Symbols and Annunciators NU gt gt X O z S my 48 Continuity Diode test Battery status Test lead connection error micro 10 amps milli 10 volts amps kilo 10 ohms mega 10 ohms Amps Alternating current Direct current Degrees Fahrenheit AUTO IRTEMP HOLDREL bo A CF MKQ re Hz mun Q Ohms V Volts AUTO Autoranging HOLD Display hold C Degrees Centigrade 5 EX411 en GB_v4 3 4 15 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 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 by2. 9 EX411 en GB v4 3 4 15 TEMPERATURE MEASUREMENTS 1 Set the function switch to the TEMP position 2 Insert the Temperature Probe into the Temperature Socket making sure to observe the correct polarity 3 Press the C or F button for the desired units 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 5 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 DISPLAY BACKLIGHT Press and hold the fei button to turn on the display backlight function The backlight will automatically turn off after 15 seconds BATTERY CHECK Te 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 a icon appears in the display the battery voltage is low and the battery should be replaced WRONG CONNECTION INDICATION The Xe icon will appear in the upper right conner of the display and the buzzer will
3. function switch to the highest V AC 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 Sch Voltage 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 200uUA DC set the function switch to the 2004A DC 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 the ci
4. 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 10 EX411 en GB_v4 3 4 15 Specifications Function Range Resolution Accuracy DC Voltage 200mV 0 1mV 0 3 reading 2 digits VDC 2V 0 001V e GC 200V 04V 0 5 reading 2 digits 1000V 1V 0 8 reading 2 digits AC Voltage 50 to 400Hz 400Hz to 1kHz V AC 2V 0 001V 1 0 reading 6 2 0 reading 8 digits True rms digits 200V 0 1V 1 5 reading 6 2 5 reading 8 digits digits 750V 1V 2 0 reading 6 3 0 reading 8 digits digits DC Current 200uA 0 1uA i o D A DC 200mA OTIMA 1 5 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 8 reading 8 digits 2 5 reading 10 True rms digits 20A 0 01A 3 0 reading 8 3 5 reading 10 digits digits Resistance 2000 0 10 0 8 reading 4 digits 20000 10 0 8 reading 2 digits 20kQ 0 01kQ A e RS 200k0 0 1kO 1 0 reading 2 digits 20MQ 0 01MQ 2 0 reading 5 digits E o Temperature E Es 3 0 reading 3 digits A to 1382 F 11 C meter only probe accuracy not included NOTE Accuracy specifications consist of two elements e reading This is
5. the accuracy of the measurement circuit e digits This is the accuracy of the analog to digital converter NOTE Accuracy is stated at 18 C to 28 C 65 F to 83 F and less than 75 RH 11 EX411 en GB_v4 3 4 15 General 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 10MO True rms 50Hz to 1kHz 200mV 3 digit 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 S E is displayed if battery voltage drops below operating voltage One 9 volt NEDA 1604 battery mA HA ranges 0 2A 250V fast blow A range 20A 250V ceramic fast blow 5 C to 40 C 41 F to 104 F 20 C to 60 C 4 F to 140 F Max 80 up to 31 C 87 F decreasing linearly to 50 at 40 C 104 F lt 80 2000 meters 7000ft maximum 342g 0 753lb includes holster 187 x 81 x 50mm 7 36 x 3 2 x 2 0 includes holster For indoor use and in accorda
6. User s Guide EX True RMS Multimeter INSTRUMENTS Extech 411 AUTO HOLD REL CE 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 International Safety Symbols This symbol adjacent to another symbol or terminal indicates the user must refer to the manual for further information This symbol adjacent to a terminal indicates that under normal use hazardous voltages may be present Double insulation This WARNING symbol indicates a potentially hazardous situation which if not avoided could result in death or serious injury This CAUTION symbol indicates a potentially hazardous situation which if not avoided may result damage to the product 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 2 EX411 en GB_v4 3 4 15 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 e Inspect the condition of the t
7. chargeable batteries in household waste As consumers users are legally required to take used batteries to appropriate collection sites the retail store where the batteries were purchased or wherever batteries are sold es Disposal Do not dispose of this instrument in household waste The user is obligated to take end of life devices to a designated collection point for the disposal of electrical and electronic equipment Other Battery Safety Reminders o Never dispose of batteries in a fire Batteries may explode or leak o Never mix battery types Always install new batteries of the same type WARNING To avoid electric shock do not operate the meter until the battery cover is in 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 13 EX411 en GB_v4 3 4 15 REPLACING THE FUSES WARNING To avoid electrical shock disconnect the meter from any circuit remove the test leads from the input terminals and turn OFF the meter before opening the case Do not operate the meter with an open case 1 Disconnect the test leads from the meter A Remove the protective rubber holster 4 A 3 Remove the battery cover two B screws and the battery 4 Remove the four A screws securing the rear cover 5 Lift the center circuit board straight up from the connectors to gain access to the
8. e positive O 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 Read the resistance in the display and then set the function switch to the lowest Q position that is greater than the actual or any anticipated resistance y CEO cay 8 EX411 en GB_v4 3 4 15 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 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 150Q the audible signal will sound If the circuit is open the display will indicate 1 Continuity wire 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 eh an 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 Im both polarities
9. en GB_v4 3 4 15 OVERVOLTAGE CATEGORY III This meter meets the IEC 610 1 2001 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 eguipment 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 VDCorVAC 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 1000V 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 battery
10. est leads and the meter itself for any damage before operating the meter Repair or replace any damage before use 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 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 Ifthe 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 training e Expired or damaged batteries can cause cauterization on contact 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 EX411
11. fuse holders 6 Gently remove the old fuse and install the new fuse into the holder 7 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 8 Align the center board with the connectors and gently press into place 9 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 UL LISTED The UL mark does not indicate that this product has been evaluated for the accuracy of its readings Copyright 2013 2015 FLIR Systems Inc All rights reserved including the right of reproduction in whole or in part in any form 1SO 9001 Certified www extech com 14 EX411 en GB_v4 3 4 15
12. nce with the requirements for double insulation to IEC1010 1 2001 EN61010 1 2001 Overvoltage Category III 600V and Category II 1000V Pollution Degree 2 12 EX411 en GB_v4 3 4 15 Maintenance WARNING To avoid electrical shock disconnect the meter from any circuit remove the test leads from the input terminals and turn OFF the meter before opening the case Do not operate the meter with an open case 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 BATTERIES OF THE RECOMMENDED SIZE AND TYPE Remove old or weak batteries so they do not leak and damage the unit 6 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 Replacement 1 Remove the Phillips head screw that secures the rear battery door 2 Open the battery compartment 3 Replace the 9V battery 4 Secure the battery compartment Never dispose of used batteries or re
13. rcuit 7 Apply power to the circuit 8 Read the current in the display Current DC mA 8 uA 7 EX411 en GB v4 3 4 15 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 banana plug into the 20A jack 4 Remove power from the 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 Current AC Source AC Amps 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 Set the function switch to the highest position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into th
14. the high input sensitivity The reading will stabilize 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 Set the function switch to the highest V DC 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 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 6 EX411 en GB v4 3 4 15 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 Set the
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