Extech Instruments EX470 datasheet: pdf
Contents
1. 8 Apply power to the circuit 9 Read the current in the display Current AC Source AC Amps 11 V5 0 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 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 12 V5 0 5 04 DIODE TEST 1 2 4 CONTINUITY CHECK WARNING To avoid electric shock never measure continuity Set the function switch to the green Q 4 position Insert the black lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive Q jack Press the SELECT button to indicate and Q on the display Touch the test probe tips to the circuit or wire you wish to check If the resistance is less than approximately 150Q the audible signal will sound If the circuit is open the display will indicate OL Set the function switch t2. REL indicator will appear on the display The display will now indicate the difference between the stored value and the measured value Press the REL button to exit the relative mode Note The Relative function does not operate in the Frequency function 17 V5 0 5 04 DISPLAY BACKLIGHT Press and hold the HOLD key for gt 1 second to turn on or off the display backlight function The backlight will automatically turn off after 30 seconds Note The HOLD feature will activate when the Backlight is turned on Press the HOLD key again to exit Hold 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 amp icon will appear in the lower left conner of the display when the battery voltage becomes low Replace the battery when this appears WRONG CONNECTION INDICATION The Se icon will appear in the upper right conner of the display and the buzzer will sound whenever 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 18 V5 0 5 04 Maintenance WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the
3. 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 This symbol indicates there is a potential hazard from a laser light source 2 V5 0 5 04 OVERVOLTAGE CATEGORY III This meter meets the IEC 610 1 95 standard for OVERVOLTAGE CATEGORY III Cat Ill 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 Frequency Resistance 250Vrms for 15sec max Capacitance Duty Cycle Diode Test Continuity Temperature 60V DC 24V AC 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 sourc
4. FF 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 2 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 voltage in the display DC Voltage 8 V5 0 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
5. UTO Autoranging DC Direct current HOLD Display hold F Degrees Fahrenheit C Degrees Centigrade 4 V5 0 5 04 Specifications Function Range Resolution Accuracy DC 400mV_ 0 1mV 0 3 reading 2 digits Voltage ay 0 001V 40V 0 01V 0 5 reading 2 digits 400V 0 1V 1000V Jav 0 8 reading 3 digits AC 50 to 400Hz 400Hz to 1kHz Voltage 400mV 0 1mV 1 5 reading 2 5 reading 15 digits 15digits a 1 5 reading 2 5 reading 40V 001V Ns 6 digits 8 digits 400V 0 1V 750V 1V 1 8 reading 3 reading 6 digits 8 digits DC 400A 0 1uA Current faoo0uA wa 1 5 reading 3 digits 40mA 0 01mA 400mA_ 0 1mA ai 2 5 reading 5 digits AC 50 to 400Hz 400Hz to 1KHz Current 400A 0 1pA 4000uA 1uA 1 8 reading 3 0 reading 40mA 0 01mA _ 8 digits 7 digits 400mA 0 1mA 4A 0 001A 3 0 reading 3 5 reading 20A 0 01A 8 digits 10 digits NOTE Accuracy is stated at 65 F to 83 F 18 C to 28 C and less than 75 RH V5 0 5 04 Function Range Resolution Accuracy Resistance 400Q 0 10 0 8 reading 4 digits 4kQ 0 001kQ 0 8 reading 2 digits 40kQ 0 01kQ 400kQ 0 1kQ 1 0 reading 2 digits 4MQ 0 001MQ Capacitance 40MQ 0 01MQ 3 0 reading 5 digits 40nF 0 01nF 5 0 reading 7 digits 400nF 0 1nF 3 0
6. User s Guide EXT INSTRUMENTS True RMS Multimeter plus IR Thermometer Extech 470 Patent Pending A w elena asin SS OCVUDTTDUNU VIS O0000 000 Introduction Congratulations on your purchase of the Extech 470 part number EX470 True RMS Autoranging Multimeter plus IR Thermometer This meter measures AC DC Voltage AC DC Current Resistance Capacitance Frequency Duty Cycle Diode Test and Continuity plus Thermocouple and Non Contact IR 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 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 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
7. air extech com Website www extech com 21 V5 0 5 04 Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for three years from date of shipment a six month limited warranty applies on sensors and cables If it should become necessary to return the instrument for service during or beyond the warranty period contact the Customer Service Department at 781 890 7440 ext 210 for authorization or visit our website at www extech com click on Contact Extech and go to Service Department to request an RA number A Return Authorization RA number must be issued before any product is returned to Extech The sender is responsible for shipping charges freight insurance and proper packaging to prevent damage in transit This warranty does not apply to defects resulting from action of the user such as misuse improper wiring operation outside of specification improper maintenance or repair or unauthorized modification Extech specifically disclaims any implied warranties or merchantability or fitness for a specific purpose and will not be liable for any direct indirect incidental or consequential damages Extech s total liability is limited to repair or replacement of the product The warranty set forth above is inclusive and no other warranty whether written or oral is expressed or implied Calibration and Repair Services Extech offers complete repair and calibr
8. ation 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 Copyright 2003 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 22 V5 0 5 04
9. 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 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 19 V5 0 5 04 BATTERY INSTALLATION WARNING To avoid electric shock disconnect the test leads from any source of voltage before removing the battery cover 1 Turn power off and disconnect the test leads from the meter 2 Open the rear battery cover by removing two screws B using a Phillips head screwdriver 3 Insert the battery into battery holder observing the correct polarity 4 Put the battery cover back in place Secure with the screw WARNING T
10. e 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 3 V5 0 5 04 Controls and Jacks IR Thermometer and laser pointer 4000 count LCD display HOLD and Backlight button SELECT button Function switch mA uA and A input jacks COM input jack Positive input jack 9 RANGE hold button 10 RELATIVE button 11 Laser pointer button 12 Protective holster oN O e U N a Note Tilt stand and battery compartment are on rear of unit Symbols and Annunciators AUTO IRTEMP HOLD REL gt Continuity DY 0 0 o gt Diode test a fiz AC Hed A Laser pointer ma a an anit 8 Battery status op oe Test lead connection E oe error am a 9 Ge n nano 10 capacitance u micro 10 amps cap m milli 10 volts amps A Amps k kilo 10 ohms F Farads capacitance M mega 10 ohms Q Ohms Hz Hertz frequency V Volts Percent duty ratio REL Relative AC Alternating current A
11. lug into the negative COM jack and the red test lead banana plug into the positive Hz jack 3 Press the SELECT key momentarily to select in the display 4 Touch the test probe tips to the circuit under test 5 Read the duty cycle on the display 16 V5 0 5 04 AUTORANGING MANUAL RANGE SELECTION Ai 2 3 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 Press the RANGE key The AUTO display indicator will turn off Press the RANGE key to step through the available ranges until you select the range you want To exit the Manual Ranging mode and return to AutoRanging press and hold the RANGE key for 2 seconds Note Manual ranging does not apply for the Capacitance Frequency and Temperature functions RELATIVE MODE 2 3 4 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 Perform the measurement as described in the operating instructions Press the REL button to store the reading in the display and the
12. 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 4 AC Voltage 9 V5 0 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 4000uA DC set the function switch to the yellow HA position and insert the red test lead banana plug into the HA mA jack 3 For current measurements up to 400mA DC set the function switch to the yellow mA position and insert the red test lead banana plug into the HA 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 b
13. o 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 F2 F1 1a 20 V5 0 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 5A 250V fast blow for the 400mA 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 O Bro D N T Support Hotline 781 890 7440 Tech support Ext 200 Email support extech com Repair Returns Ext 210 Email rep
14. o the green Q position Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive V jack Press the SELECT button to indicate and V on the display 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 13 V5 0 5 04 CONTACT TEMPERATURE MEASUREMENTS 1 Set the function switch to the black Type K F 2 4 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 or C position Insert the Temperature Probe into the input jacks making sure to observe the correct polarity 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 Read the temperature in the display jacks 14 V5 0 5 04 NON CONTACT TEMPERATURE MEASUREMENTS Set the function switch to the red IR Non Contact F or C 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 dete
15. reading 5 digits 4uF 0 001 uF AQuF 0 01 uF 3 5 reading 5 digits 100uF Jo 1uF 5 0 reading 5 digits Frequency 5 000Hz 0 001Hz 1 5 reading 5 digits 50 00Hz 0 01Hz 500 0Hz 0 1Hz 5 000kHz 0 001kHz 50 00kHz 0 01kHz 1 2 reading 2 digits 500 0kHz 0 1kHz 5 000MHz 0 001MHz 10 00MHz 0 01MHz 1 5 reading 4 digits Sensitivity 0 8V rms min 20 to 80 duty cycle and lt 100kHz 5Vrms min 20 to 80 duty cycle and gt 100kHz Duty Cycle 0 1 to 99 9 0 1 1 2 reading 2 digits Pulse width 100us 100ms Frequency 5Hz to 150kHz Temp 4 to 1382 F 1 F 3 0 reading 3 digits type K 20 to 750 C 1 C __ probe accuracy not included Temp 58 to 518 F 1 F d 2 0 reading or 2 C 4 F IR 50 to270 C 1 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 6 V5 0 5 04 Diode Test Continuity Check Temperature Sensor IR Spectral response IR Emissivity IR distance ratio 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 Humidi
16. rmined by the distance to spot size specification 5 Read the temperature in the display Diameter of Spot 10cm 4 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 present some potential for hazard if viewed directly for extended periods of time LASER RADIATION DO NOT STARE INTO BEAM DIODE LASER lt 1mW Output at 630 to 670nm CLASS II LASER PRODUCT 15 V5 0 5 04 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 position 2 Insert the black test lead banana plug into the negative COM jack Insert the red test lead banana plug into the positive 4 jack 3 Touch the test leads to the capacitor to be tested 4 Read the capacitance value in the display FREQUENCY MEASUREMENTS 1 Set the rotary function switch to the green Hz position 2 Insert the black lead banana plug into the negative COM jack and the red test lead banana plug into the positive Hz jack 3 Touch the test probe tips to the circuit under test 4 Read the frequency on the display DUTY CYCLE 1 Set the rotary function switch to the Hz position 2 Insert the black lead banana p
17. ty Storage Humidity Operating Altitude Weight Size Safety 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 Requires type K thermocouple 6 to 16um 0 95 fixed 8 1 gt 7 5MQ VDC amp VAC True rms 50Hz to 1kHz lt 3 1 at full scale amp lt 6 1 at half scale 4000 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 pA ranges 0 5A 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 753lb 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 II 1000V Pollution Degree 2 7 V5 0 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 O
18. utton 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 Current DC mA amp uA 10 V5 0 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 4000UA AC 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 400mA 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 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
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