Amprobe AM-420 Digital Multimeter
Contents
1. HARD AT WORK SINCE 1948 AM 420 Digital Multimeter Users Manual e Manual de uso e m Q 20 21 av 2k 200 CAT 11250 V FUSED 200 mA MAX EI 420 Digital Multimeter Users Manual 11 2014 4266183 2014 Amprobe Test Tools All rights reserved Printed in China Limited Warranty Limitation of Liability Your Amprobe product will be free from defects in material and workmanship for one year from the date of purchase unless local laws require otherwise This warranty does not cover fuses disposable batteries or damage from accident neglect misuse alteration contamination or abnormal conditions of operation or handling Resellers are not authorized to extend any other warranty on the behalf of Amprobe To obtain service during the warranty period return the product with proof of purchase to an authorized Amprobe Service Center or to an Amprobe dealer or distributor See Repair Section for details THIS WARRANTY IS YOUR ONLY REMEDY ALL OTHER WARRANTIES WHETHER EXPRESS IMPLIED OR STATUTORY INCLUDING IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY ARE HEREBY DISCLAIMED MANUFACTURER SHALL NOT BE LIABLE FOR ANY SPECIAL INDIRECT INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES ARISING FROM ANY CAUSE OR THEORY Since some states or countries do not allow the exclusi2. Range Resolution Accuracy 200 V 0 1V 1 5Yo 4 LSD 250 1V 2 0 4 LSD Input impedance around 0 5 MQ Frequency response 45 Hz 400 Hz Overload protection 250 VDC or AC rms DC Voltage Measurement Range Resolution Accuracy 200 mV 0 1 mV 2V 0 001 V A 20V 0 01 V 1 2 2 LSD 200 V 0 1V 250 1V 1 5 2 LSD Input impedance around 1 MQ Overload protection 250 VDC or AC rms DC Current Measurement Range Resolution Accuracy 200 LA 0 1 pA 1 2 5 LSD 2mA 0 001 mA 20 mA 0 01 mA x 2 596 4 LSD 200 mA 0 1 mA Overload protection 250 max An 315 mA 250 V fast fuse b5x20 mm Resistance Measurement Range Resolution Accuracy 2000 010 2ko 9001 Ke 1 5 5 LSD 200 kQ 0 1 2MQ 0 001 MQ 2 0 4 LSD Open circuit voltage around 3 VDC Overload protection 250 VDC or AC rms Continuity Diode Measurement Range Resolution Accuracy ej 19 Open circuit voltage is around 3 VDC Resistance gt 700 buzzer will not sound Resistance 100 buzzer will sound 11 Resistance 70 not specified gt 1 mV Open circuit voltage is around 1 5V Normal voltage is around 0 5V to 0 8V for silicon PN junction Overload protection 250 VDC or AC rms Battery Test Range Resolution Accuracy 1 5V 0 001 V av 0 01 V 8 0Y
3. WA 98203 Mississauga ON L4Z 1X9 Tel 877 AMPROBE 267 7623 Tel 905 890 7600 Non warranty Repairs and Replacement Europe European non warranty units can be replaced by your Amprobe distributor for a nominal charge Please check the Where to Buy section on www Amprobe eu for a list of distributors near you Amprobe Europe Beha Amprobe In den Engematten 14 79286 Glottertal Germany Tel 49 0 7684 8009 0 www Amprobe eu Correspondence only no repair or replacement available from this address European customers please contact your distributor 5 SYMBOLS 2 nene SAFETY INFORMATION UNPACKING AND INSPECTION FEATURES sites etnies MAKING MEASUREMENTS Rotary Switch Positions HOLD Button a c serito Measuring AC Voltage Measuring DC Voltage Measuring DC Current Measuring Resistance Measuring Continuity Measuring Diode Battery Test DETAILED SPECIFICATIONS TROUBLESHOOTING BATTERY AND FUSE REPLACEMENT 420 20k e AK Q 11250 V FUSED 200 LCD display Display HOLD button Rotary switch Test pro
4. the polarity signs Fuse replacement Replace the broken fuse F1 with rating 315 250 V fast fuse 05x20 mm 6 Put the back cover back re fasten the screw and install the holster back Battery 9 V alkaline batteries 6LF22 6LR61 MN1604 or equivalent Fuse 315 mA 250 V fast fuse b5x20 mm 11 Visit www Amprobe com for e Catalog Application notes Product specifications e User manuals Amprobe www Amprobe com info amprobe com Everett WA 98203 Tel 877 AMPROBE 267 7623 Amprobe Europe Beha Amprobe In den Engematten 14 Gb 79286 Glottertal Germany M Tel 49 0 7684 8009 0 Recycle
5. 50 VAC DC voltage measurement up to 250 V V 200 VDC DC voltage measurement up to 200 V i 20 VDC DC voltage measurement up to 200 V 2 VDC DC voltage measurement up to 2 V 200m mA DC DC current measurement up to 200 mA 20 DC DC current measurement up to 20 mA 2 DC DC measurement up to 2 200 pA DC DC current measurement up to 200 LA 2M MQ Resistance measurement up to 2 MQ 200k ka Resistance measurement up to 200 Q 20k ka Resistance measurement up to 20 2k ka Resistance measurement up to 2 200 Q Resistance measurement up to 200 Q av V DC For measurement of dry batteries of not Ti exceeding 15 Vdc 15V V DC For measurement of dry batteries of not exceeding 2 Vdc VDC Voltage measurement of diode PN junction a Q Continuity measurement buzzer will sound when s 10 Q HOLD Button Press HOLD button to freeze present reading on display Press again to resume normal operation A A Warning To avoid electric shock do not use the HOLD mode to determine if a circuit is live The Meter holds the reading on the display and does not refresh the reading automatically The HOLD button may be activated even when the product is NOT on if H appears in the left side of the display HOLD is active The HOLD function allows the meter to continue displaying the last reading which may be 0 This reading will not change as long as the HOLD function is active even if
6. ELEC Low voltage directive 2006 95 EC and Electromagnetic compatibility directive 2004 108 EC A AN Warning Read Before Using To avoid possible electrical shock or personal injury follow these instructions and use the Meter only as specified in this manual Do not use the Meter or test leads if they appear damaged or if the Meter is not operating properly If in doubt have the Meter serviced Always use the proper function and range for measurements Before rotating the function range selection switch disconnect test probe from circuit under test Verify the Meter s operation by measuring on a known source 3 Do more than the rated voltage as marked the Meter between the test probe or between any test probe and earth ground Use the Meter with caution for voltages above 30 Vac rms 42 Vac peak or 60 Vdc These voltages pose electrical shock hazards Disconnect circuit power and discharge all high voltage capacitors before testing resistance continuity and diode Do not use the Meter around explosive gas or vapor When using the test leads keep your fingers behind the finger guards Remove test leads from the Meter before opening the Meter s case If the meter is used in a manner not specified in the users manual the protection provided by the equipment may be impaired To avoid injury when the battery low indicator is present in the display the product should NOT be used A false measurement m
7. ay occur The battery should be replaced immediately UNPACKING AND INSPECTION Your shipping carton should include 1 AM 420 Multimeter 1 9V alkaline battery installed 1 Users manual If any of the items are damaged or missing return the complete package to the place of purchase for an exchange FEATURES Residential digital multimeter to check for voltage in receptacles electrical circuits fuses light bulbs and electrical connections Measurements Voltage up to 250V AC DC DC Current and Resistance Special functions Audible continuity and diode test Event Data hold Low battery warning e Safety CAT II 250V MAKING MEASUREMENT AA 1 Use the proper function and range for measurements 2 To avoid possible electrical shock personal injury or damages to the Meter disconnect circuit power and discharge all high voltage capacitors before testing resistance continuity and diode 3 Connecting test leads Connect the common black test lead to the circuit before connecting the live lead e After measurement remove live lead before removing the common black test lead from the circuit 4 Over range indication 1 1 maximum display reading 4 Rotary Switch Positions Switch Position Measurement Unit Measurement Function va 250 voltage measurement up to 250 200 AC voltage measurement up to 200 2
8. be Hazardous voltage Display hold Negative reading Low battery indicator Measurement reading SYMBOLS Caution Risk of electric shock Caution Refer to the explanation in this manual Alternating The equipment is protected by double insulation or reinforced insulation Earth Ground sf EY El Battery Complies with European Directives Conforms to relevant Australian Standards Q Canadian Standards Association NRTL C Do not dispose of this product as unsorted municipal waste Contact a qualified recycler O SAFETY INFORMATION The Meter complies with IEC EN 61010 1 3rd Edition UL61010 1 2nd Ed and CAN CSA C22 2 No 61010 1 04 CSA Update No 1 2008 to Category 250 Volts Pollution degree 2 IEC EN 61010 2 030 IEC EN 61010 2 31 for test leads EMC IEC EN 61326 1 This product has been tested to the requirements of 5 22 2 61010 1 second edition including Amendment 1 or a later version of the same standard incorporating the same level of testing requirements Measurement Category II CAT II is for measurements performed on circuit directly connected to the low voltage installation Examples are measurements on house hold appliances portable tools and similar equipment CENELEC Directives The instruments conform to CEN
9. o 1 LSD For 1 5V range Load resistance is around 502 For 9V range Load resistance is around 1kQ MAINTENANCE AND REPAIR If the Meter fails to operate check battery test leads etc and replace as necessary Double check the followings 1 Replace the fuse or battery if the meter doesn t work 2 Review the operating instructions for possible mistakes in operating procedure Except for the replacement of the fuse and battery repair of the meter should be performed only by an authorized service center or by other qualified instrument service personnel The front panel and case can be cleaned with a mild solution of detergent and water Apply sparingly with a soft cloth and allow to dry completely before using Do not use aromatic hydrocarbons Gasoline or chlorinated solvents for cleaning BATTERY AND FUSE REPLACEMENT A AN Warning To avoid shock injury or damage to the Meter disconnect the test lead from the measuring circuit before opening case Use ONLY fuse with the amperage interrupt voltage and speed ratings specified Replacing BATTERY and FUSE follow below steps Disconnect the test lead probe from measuring circuit 2 Turn the Meter to OFF position 3 Remove holster and the screws from the back cover and then open the back cover 4 Battery replacement Remove the battery and replace with one 9 V Alkaline battery 6LF22 6LR61 MN1604 or equivalent Pay attention to
10. on or limitation of an implied warranty or of incidental or consequential damages this limitation of liability may not apply to you Repair Amprobe returned for warranty or non warranty repair or for calibration should be accompanied by the following your name company s name address telephone number and proof of purchase Additionally please include a brief description of the problem or the service requested and include the test leads with the meter Non warranty repair or replacement charges should be remitted in the form of a check a money order credit card with expiration date or a purchase order made payable to Amprobe In warranty Repairs and Replacement All Countries Please read the warranty statement and check your battery before requesting repair During the warranty period any defective test tool can be returned to your Amprobe distributor for an exchange for the same or like product Please check the Where to Buy section on www Amprobe com for a list of distributors near you Additionally in the United States and Canada in warranty repair and replacement units can also be sent to an Amprobe Service Center see address below Non warranty Repairs and Replacement United States and Canada Non warranty repairs in the United States and Canada should be sent to an Amprobe Service Center Call Amprobe or inquire at your point of purchase for current repair and replacement rates USA Canada Amprobe Amprobe Everett
11. onnect circuit power and discharge all high voltage capacitors before testing diode Battery Test AA Applying a voltage source or incorrect battery type under battery test may cause personal injury or damage to the Meter Battery 1 5V range is for dry battery not exceeding 2Vdc The resistance load is around 500 Battery 9V range is for dry battery not exceeding 15Vdc The resistance load is around 1 DETAILED SPECIFICATIONS Ambient temperature 23 C 5 C 73 4 F gt 9 F Relative temperature lt 75 Accuracy of reading digits Maximum voltage between input terminal and earth ground AC 250 Vrms or DC 250V Fuse F1 315 250 fast fuse 05 x 20 mm Maximum display 1999 updates 2 to 3 sec Over range indication 1 1 or maximum display reading Range Manualranging Operating altitude 2000 m Operating temperature 0 C to 40 C 32 F to 104 F Relative humidity 0 C to 30 C 32 F to 86 F 75 30 C to 40 C 86 F to 104 F lt 50 Storage temperature 10 C to 50 C 14 F to 122 F Electromagnetic compatibility In an RF field of 1V m Specified accuracy 5 RF field 1V m is not specified Power supply One 9V alkaline battery 61 22 6LR61 MN1604 or equivalent Low battery indication Dimensions L x W x H 115 x 65 x 40 mm 4 5 x 2 6 x 1 6 in Weight Approximately 275 g 0 61 Ib with battery installed AC Voltage Measurement
12. the meter is later connected to an energized circuit HOLD can be disabled by pressing the HOLD button again Readings will resume Measuring Voltage AA Do not apply on a voltage source higher than AC 250V and use proper range for measurement Over range indication 1 1 ora reading exceeds 250 Measuring DC Voltage AA Do not apply on a voltage source higher than DC 250V and use proper range for measurement Over range indication 1 1 ora reading exceeds 250 AA To avoid personal injury or damage to the Meter 1 Do not attempt to make an in circuit current measurement when the open circuit potential to earth ground exceeding 250V 2 Switch to proper function and range for your measurement 3 Do not place the test probe in parallel with a circuit when the test leads are connected to the current terminals 4 Connect the test leads to the circuit before powering the circuit under test 5 After measurement switching OFF the circuit s power before removing test leads from the circuit Measuring Resistance AA Disconnect circuit power and discharge all high voltage capacitors before testing resistance Measuring Continuity AA Disconnect circuit power and discharge all high voltage capacitors before testing continuity Meter beeps at 100 beeper turns off at gt 70Q Measuring Diode AA Disc
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