Manual - Extech Instruments
Contents
1. 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 NEVER look directly at the laser light source or aim the pointer at an eye 4 EX450 en GB_v5 5 4 15 Controls and Jacks IR Thermometer and laser pointer 2000 count LCD display HOLD button SELECT button Function switch mA UA and A input jacks COM input jack Positive input jack MAX hold button voltage and current 10 BACKLIGHT button 11 Laser pointer button 12 Protective holster OOO GTR GON A Kol Note Tilt stand and battery compartment are on rear of unit Symbols and Annunciators Continuity Pi Diode test A Laser pointer g Battery status xe Test lead connection error u micro 10 amps m milli 10 volts amps k kilo 10 ohms M mega 10 ohms A Amps AC Alternating current Q Ohms DC Direct curren2. 5 Press the SELECT button to indicate AC 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 7 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 8 Apply power to the circuit 9 Read the current in the display 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 batteries and unplug the line cords 1 Set the function switch to the green Q 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 SELECT button to indicate Q 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 8 EX450 en GB_v5 5 4 15 CONTINUITY CHECK WARNING To avoid electric shock never measure continuity on circuits or wires that have voltage on them th Set the function switch to the green Q 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 Pr
3. into the pA mA jack 3 For current measurements up to 200mA 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 A range and insert the red test lead banana plug into the A jack 5 Press the SELECT 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 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 7 EX450 en GB_v5 5 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 2000HA AC set the function switch to the yellow yA position and insert the red test lead banana plug into the pA mA jack 3 For current measurements up to 200mA AC 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 AC set the function switch to the yellow A range and insert the red test lead banana plug into the A jack
4. User s Guide EXTECH INSTRUMENTS Digital Multimeter plus IR Thermometer Extech 450 EXTECH CEJ ae Introduction Congratulations on your purchase of the Extech 450 part number EX450 Autoranging Multimeter plus IR Thermometer This meter measures AC DC Voltage AC DC Current Resistance Capacitance Frequency Duty Cycle Diode Test and Continuity plus Non Contact IR 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 may be present Double insulation A This symbol adjacent to a terminal indicates that under normal use hazardous voltages CAUTION This CAUTION symbol indicates a potentially hazardous situation which if not avoided may result damage to the product This WARNING symbol indicates a potentially hazardous situation which if not avoided could result in death or serious injury MAX This symbol advises the user that the terminal s so marked must not be 600V connected to a circuit point at which the voltage with respect to earth ground exceeds in this case 600 VAC or VDC This symbol indicates there is a potential hazard from a laser light source 2 EX450 en GB_v5 5 4 15 CAUTIONS e Improper use of this meter can cause damage shock injury or death Read and understand this user man
5. ess the SELECT button to indicate 9 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 150Q 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 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 Press the SELECT 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 EX450 en GB_v5 5 4 15 NON CONTACT TEMPERATURE MEASUREMENTS 1 Set the function switch to the red IR Non Contact C or F position 2 Point the meter at the surface to be measured 3 If needed press the red IR Laser Pointer button to locate the exact spot being measured 4 The area of the surface to be measured must be larger than the spot size as determined by the distance to spot size specification 5 Read the temperature in the display Diameter of Spot 5 4 Geen sm Distance to Object WARNING Do not directly view or direct the laser pointer at an eye Low power visible lasers do not normally present a hazard but may
6. eter 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 rechargeable 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 LC Disposal Do not dispose of th
7. ge in the display 6 EX450 en GB_v5 5 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 1 Set the function switch to the green V position 2 Press the SELECT button to indicate AC on the display 3 Insert the black test lead banana plug into the negative COM jack Insert red test lead banana plug into the positive V jack 4 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 5 Read the voltage in the display 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 2000UA DC set the function switch to the yellow yA position and insert the red test lead banana plug
8. is 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 EX450 en GB_v5 5 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 Remove the protective rubber holster 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 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 5A 250V fast blow for the 400mA range 20A 250V fast blow for the 20A range 8 Align the center board with the connectors a
9. nd 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 EX450 en GB_v5 5 4 15
10. nge Resolution Accuracy DC Voltage 200mV 0 1mV 0 5 reading 2 digits 2V 0 001V 20V 0 01V 0 8 reading 2 digits 200V 0 1V 1000V 1V 1 0 reading 3 digits AC Voltage 50 to 400Hz 400Hz to 1kHz a pony eee 2 5 reading 8 digits igits 750V 1V 2 0 reading 6 3 5 reading 8 digits digits DC Current 200uA 0 1uA oe EA a 1 5 reading 3 digits 200mA 0 1mA 2n ener 2 5 reading 5 digits 20A 0 01A AC Current 50 to 400Hz 400Hz to 1KHz 2004A 0 1uA z Te eee OT digis 9 _ 3 0 reading 7 digits 200mA 0 1mA 2A 0 001A 3 0 reading 8 3 5 reading 10 20A 0 01A digits digits NOTE Accuracy is stated at 18 C to 28 C 65 F to 83 F and less than 75 RH 11 EX450 en GB_v5 5 4 15 Function Range Resolution Accuracy Resistance 200Q 0 10 0 8 reading 4 digits 2kQ 0 001kQ 0 8 reading 2 digits 20kQ 0 01kQ 200kQ 0 1kQ 1 0 reading 2 digits 2MQ 0 001MQ 20MQ 0 01MQ 3 0 reading 5 digits Temp 58 to 518 F 1 F A IR 50 to270 C 1 C 2 0 reading or 2 C 4 F 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 Diode Test Continuity Check IR Spectral response IR Emissivity IR distance ratio Input Impedance AC Response ACV Bandwidth Display Ove
11. present some potential for hazard if viewed directly for extended periods of time DISPLAY BACKLIGHT Press and hold the HOLD key for gt 1 second to turn on or off the display backlight function Note The HOLD feature will activate when the Backlight is turned on Press the HOLD key again to exit Hold MAX Press the MAX button to activate the MAX feature in the voltage or current functions The display will hold the maximum reading and will update only when a reading higher then the currently displayed reading occurs Press the MAX button again to disable the feature 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 The gy icon will appear in the lower left conner of the display when the battery voltage becomes low Feplace the battery when this appears WRONG CONNECTION INDICATION The aaa icon will appear in the upper right conner of the display and the buzzer will sound when ver the positive test lead is inserted into the 20A or uA mA input jack and a non current green black or red 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 EX450 en GB_v5 5 4 15 Specifications Function Ra
12. rrange 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 Patent Notice Test current of 0 3mA maximum open circuit voltage 1 5V DC typical Audible signal will sound if the resistance is less than 150Q approx test current lt 0 7mA 6 to 16um 0 95 fixed 8 1 gt 7 5MQ VDC amp VAC Average responding 50Hz to 1kHz 2000 count backlit liquid crystal OL is displayed 15 minutes approximately 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 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 7000 ft 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 accordance with the requirements for double insulation to IEC1010 1 1995 EN61010 1 1995 Overvoltage Category III 600V and Category II 1000V Pollution Degree 2 U S Patent 7056012 12 EX450 en GB_v5 5 4 15 Maintenance WARNING To avoid electrical shock disconnect the m
13. t V Volts F Degrees Fahrenheit AUTO Autoranging C Degrees Centigrade HOLD Display hold as IRTEMP HOLDREL gt 20 MI VAF OOO EX450 en GB_v5 5 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 OL 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 response is normal and is caused by 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 green V position Press the SELECT button to indicate DC on the display 3 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive V jack 4 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 5 Read the volta
14. ual before operating the meter e Always remove the test leads before replacing the battery or fuses e Inspect the condition of the test 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 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 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 e
15. xtended 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 e Do not directly view or direct the laser pointer at an eye Low power visible lasers do not normally present a hazard but may present some potential for hazard if viewed directly for extended periods of time 3 EX450 en GB_v5 5 4 15 OVERVOLTAGE CATEGORY III This meter meets the IEC 610 1 2001 standard for OVERVOLTAGE CATEGORY III Cat IIl 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 V DC or VAC 1000VDC 750AC 200Vrms on 400mV range mA AC DC 500mA 250V fast acting fuse AAC DC 20A 250V fast acting fuse 30 seconds max every 15 minutes Resistance Diode Test Continuity 250Vrms for 15sec max Temperature 60V DC 24V AC
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