True RMS Multimeter - Extech Instruments
Contents
1. 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 and FUSE Replacement 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 Lift the meter stand to expose the battery cover 3 Open the rear battery fuse compartment by removing the Phillips head screw on the lower rear of the meter 4 Carefully pull down on the cover just enough to release the latch and then lift it off The cover will not pull down all the way 5 Remove the old battery or fuse and install a new one of the correct rating 6 Place the battery fuse cover back in place Secure with the screw WARNING To avoid electric shock do not operate the meter until the battery cover is in place and fastened securely NOTE If the meter does n2. E button to indicate 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 the continuity threshold the audible signal will sound DIODE TEST 1 Rotate the function switch to the green position 2 Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the positive gt jack 3 Press the MODE button to indicate gt 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 7 EX205T en GB_v1 2 09 15 AUTORANGING MANUAL RANGE SELECTION When the meter is first switched on it automatically enters the Auto Ranging mode 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 button The AUTO display indicator will turn off 2 Press the RANGE key to step through the available ranges until the range desired is selected 3 Press and hold the RANGE button for 2 seconds to exit manual ranging Note Manual ranging does not apply to the Diode and Continuity functions MAX MAXIMUM READING MODE 1 Press the MAX b
3. User Guide EXTECH INSTRUMENTS True RMS Multimeter Extech EX205T Introduction Thank you for selecting the Extech EX205T True RMS Auto ranging Multimeter This meter measures AC DC Voltage AC DC Current Resistance Diode Test and Continuity Proper use and care of this meter will provide many years of reliable service Please visit the Extech Instruments website www extech com to check for the latest version of this User Guide Extech Instruments is an ISO 9001 certified company 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 avoided could result in death or serious injury This CAUTION symbol indicates a potentially hazardous situation which if not CAUTION a avoided may result damage to the product This WARNING symbol indicates a potentially hazardous situation which if not MAX 600V 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 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 ins
4. attery compartment are on rear of unit Symbols and Enunciators m Continuity gt Diode test micro 10 amps u m milli 10 volts amps A Amps k kilo 10 ohms M mega 10 ohms Q Ohms V Volts AC Alternating current DC Direct current MAX Maximum AUTO Auto ranging HOLD Display hold EX205T en GB_v1 2 09 15 Operating Instructions WARNING Risk of electrocution High voltage circuits both AC and DC are extremely 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 AC 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 Rotate the function switch to the VAC or 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 DC CURRENT MEASUREMENTS 1 Insert the black test lead banana plug into the negative COM jack 2 Press the MODE button to indicate DC or AC on the disp
5. ith 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 AC DC Resistance Diode Test Continuity 600 VDC AC rms HA or mA AC DC 200mA fused A AC DC 10A fused USE EXTREME CAUTION when working with high voltages DO NOT measure voltage if the voltage on the COM input jack exceeds 600V above earth ground 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 ALWAYS discharge filter capacitors in power supplies and disconnect the power when making resistance or diode tests ALWAYS turn off the power and disconnect the test leads before opening the covers to replace the fuse or batteries NEVER operate the meter unless the back cover and the battery and fuse covers are in place and fastened securely If the eguipment is used in a manner not specified by the manufacturer the protection provided by the eguipment may be impaired 4 EX205T en GB_v1 2 09 15 Controls and Jacks 2000 count LCD MAX button MODE button FUNCTION switch mA pA and 10A input jacks Backlight button HOLD button RANGE button So o le O ED Positive input jack 10 COM input jack a A ON Note Tilt stand test lead holders and b
6. lay 3 For current measurements up to 2000pA set the function switch to the pA position and insert the red test lead banana plug into the HA mA jack 4 For current measurements up to 200 mA DC set the function switch to the mA position and insert the red test lead banana plug into the HA mA jack 5 For current measurements up to 10A DC set the function switch to the 10A position and insert the red test lead banana plug into the 10A jack 6 Connect the test leads in series with the circuit under test 7 Apply power to the circuit 8 Read the current in the display 6 EX205T en GB_v1 2 09 15 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 Rotate the function switch to the 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 O jack 3 Touch the test probe tips across the device under test 4 Read the resistance in the display CONTINUITY CHECK WARNING To avoid electric shock never measure continuity on circuits or wires that have a voltage potential 1 Rotate 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 jack 3 Press the MOD
7. ot work properly check the fuses and replace the battery to make sure that they are still good and that they are properly inserted 9 EX205T en GB_v1 2 09 15 Specifications Function Range Resolution Accuracy DC Voltage 200 mV 0 1 mV 0 8 reading 6 digits 2V 0 001V 0 5 reading 2 digits 20V 0 01V 200V 0 1V 0 8 reading 2 digits 600V 1V AC Voltage 200 mV 0 1 mV 50 60Hz 2V 0 001V 20V 0 01V 1 5 reading 6 digits 200V 0 1V 600V 1V All AC voltage ranges are specified from 5 of range to 100 of range DC Current 200 pA 0 1 pA 2000 pA 1 pA 1 5 reading 5 digits 20 mA 0 01 mA 200 mA 0 1 mA 2 000 0 001 A 2 5 reading 5 digits 10A 0 01A Note 10A for 30 sec max AC Current 200 pA 0 1 pA 50 60Hz 2000 pA 1uA 1 5 reading 8 digits 20 mA 0 01 mA 200 mA 0 1 mA 2 000 0 001 A 3 0 reading 5 digits 10A 0 01A Note 10A for 30 sec max Resistance 200 Q 0 10 0 8 reading 5 digits 2kQ 0 001 kQ 20 kQ 0 01 kQ 0 8 reading 2 digits 200 kQ 0 1 KQ 2MQ 0 001 MQ 2 5 reading 8 digits 20 MQ 0 01 MQ NOTE Accuracy is stated at 18 C to 28 C 65 F to 83 F and less than 75 RH 10 EX205T en GB_v1 2 09 15 Enclosure Diode Test Continuity Input Impedance AC Response ACV Bandwidth Display Over range indication Auto Power Off Polarity Measurement Rate Battery Fuse
8. r e Use great care when making measurements if the voltages are greater than 25 VAC rms or 35 VDC These voltages are considered a shock hazard e Warning This is a Class A device This device can cause interference in residential areas 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 must not be used by children It contains hazardous objects as well as small parts that the children could swallow e Do not leave batteries and packing material lying around unattended they can be dangerous to children e Inthe event that this device will be stored for an extended period of time remove the batteries e Expired or damaged batteries can be hazardous to skin Use suitable hand gloves in such cases e Do not short circuit the battery e Never dispose of batteries in a fire Batteries may explode or leak e Never mix battery types Always install new batteries of the same type 3 EX205T en GB_v1 2 09 15 SAFETY INSTRUCTIONS This meter has been designed for safe use but must be operated w
9. s Operating Temperature Storage Temperature Operating Humidity Storage Humidity Operating Altitude Weight Size Safety Approvals Double molded Test current of 0 0mA maximum open circuit voltage 2 8V DC typical Threshold 20 to 50Q test current lt 1 5mA 10MQ VDC VAC True rms 40Hz to 1000Hz 2 000 count backlit liquid crystal display OL is displayed 15 minutes approximately Automatic no indication for positive Minus sign for negative 2 times per second nominal One 9 volt NEDA 1604 battery mA HA ranges 200mA 250V ceramic fast blow A range 10A 600V ceramic fast blow 10 C to 40 C 14 F to 122 F 10 C to 60 C 14 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 260 g 9 17 oz 147x76x42 mm 5 8x2 9x1 6 This meter is intended for origin of installation use and protected against the users by double insulation per IEC EN 61010 1 2001 and IEC EN 61010 031 2002 to Category lll 600V Pollution Degree 2 CE Copyright 2013 2015 FLIR Systems Inc All rights reserved including the right of reproduction in whole or in part in any form www extech com 11 EX205T en GB_v1 2 09 15
10. ulation 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 PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY I Eguipment of OVERVOLTAGE CATEGORY I is eguipment 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 II 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 EX205T en GB_v1 2 09 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 test leads and the meter itself for any damage before operating the mete
11. utton to activate the MAX mode The display icon MAX will appear The meter will display and hold the maximum reading and will update only when a new maximum value is detected 2 Press the MAX button again to exit the mode Note Max does not apply to the Resistance Diode and Continuity functions DISPLAY BACKLIGHT Press and hold the button for 2 second to turn the backlight on The backlight will automatically turn off after approximately 10 seconds or press and hold the button again for 2 seconds to manually turn it off HOLD The HOLD function freezes the reading in the display Press the HOLD button momentarily to activate or to exit the HOLD function Note The HOLD button does not function in the IR measurement mode AUTO SLEEP If no button is pressed the auto sleep feature will place the meter in sleep mode after approximately 15 minutes of operation If this happens press any button to wake the meter or switch the meter to OFF if it no longer in use 8 EX205T en GB_v1 2 09 15 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 the 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 followed 1 KEEP THE METER DRY If it gets wet
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