User Manual PDF
Contents
1. used as a data hold feature This feature is useful in dimly lit or hard to reach locations Maintenance WARNING To avoid electrical shock disconnect the meter from any circuit and remove the test leads from the input terminals before opening the case Do not operate the meter with an open case Cleaning and Storage Periodically wipe the case with a damp cloth and mild detergent do not use abrasives or solvents If the meter is not to be used for 60 days or more remove the battery and store it separately Battery and Fuse Replacement 1 Remove the two 2 Phillips head screws at the rear of the meter 2 Carefully open the meter housing 3 Replace the 1 5V AA battery if necessary 4 Replace the fuse if necessary with a 0 5A 250V glass fuse 6mm x 30mm or equivalent Note that a spare fuse is provided inside the meter housing 5 Close the meter and replace the meter screws securely 6 AM300 V1 1 6 07 Warranty EXTECH INSTRUMENTS CORPORATION warrants this instrument to be free of defects in parts and workmanship for one year from date of shipment a six month limited warranty applies to 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 www extech com for contact information A Return Authorization RA number must be issued before any prod2. User s Guide EXT INSTRUMENTS Extech AM300 300A AC Analog Clamp Meter e ZERO ADJ Q ZERO ADJ EXTECH NTS AM300 300A AC Clamp Meter Introduction Congratulations on your purchase of the Extech AM300 Analog Clamp Meter This device measur e AC Voltage and Current DC Voltage and Resistance This meter is shipped fully tested and calibrated and with proper use will provide years of reliable service Safety International Safety Symbols A L 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 SAFETY NOTES Do not exceed the maximum allowable input range of any function Function _ Maximum Input V DC V AC 600V DC AC Do not apply voltage to meter when resistance function is selected Remove the battery if meter is to be stored for longer than 60 days WARNINGS CAUTI Set function switch to the appropriate position before measuring When measuring volts do not switch to current resistance modes Do not measure current on a circuit whose voltage exceeds 600V When changing ranges always disconnect the test leads from the circuit under test ONS Improper use of this meter can cause damage shock injury or death Read and understand this user manual before operatin
3. ding in the upper half of the scale Ensure that the Pointer Lock switch is set to the right most position so that the pointer may freely move Turn the Zero Adjust screw to zero the meter display Connect the test leads in parallel to the circuit under test The analog display pointer will indicate the voltage reading S AM300 V1 1 6 07 Resistance Measurements WARNING To avoid damage to the meter do not apply voltage to the meter when measuring resistance Ensure that the circuit device or component under test is disconnected from power before measuring resistance 1 Insert the black test lead into the negative COM terminal and the red test lead into the OHMS positive terminal 2 Set the display scale to the OHMS position using the thumbwheel switch 3 Ensure that the Pointer Lock switch is set to the right most position so that the pointer may freely move 4 With the test leads open adjust the meter zero so that the pointer is over the symbol 5 Touch the test lead tips together and adjust the 0 Ohms adjust until the pointer is over the 0 ohms position 6 Touch the test probe tips across the circuit or component under test 7 The analog display pointer will indicate the resistance reading Pointer Lock Function The Pointer Lock switch freezes the pointer s position and can be
4. g the meter Always remove the test leads before replacing the battery or fuses 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 Use great care when making measurements if the voltages are greater than 25VAC rms or 35VDC These voltages are considered a shock hazard Always discharge capacitors and remove power from the device under test before performing Resistance tests 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 If the equipment is used in a manner not specified by the manufacturer the protection provided by the equipment may be impaired 2 AM300 V1 1 6 07 STANDARDS PER IEC1010 OVERVOLTAGE INSTALLATION CATEGORY OVERVOLTAGE CATEGORY Equipment of OVERVOLTAGE CATEGORY is equipment 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 Il 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 No
5. mm x 30mm spare fuse supplied Dimensions amp Weight 9 0 x 2 8 x 1 5 230 x 72 x 37mm 14 70z 416g Safety For indoor use and in accordance with the requirements for double insulation to IEC1010 1 2001 EN61010 1 2001 Overvoltage Category II 600V Pollution Degree 2 4 AM300 V1 1 6 07 Operation NOTES Read and understand all Wamingand Cautionstatements in this operation manual prior to using this meter AC Current Measurements WARNING Ensure that the test leads are disconnected from the meter before making current clamp measurements AC DC Voltage Measurements 1 Set the scale to the highest range using the function thumbwheel switch Step down to the lower ranges as necessary in order to keep the reading in the upper half of the scale Ensure that the Pointer Lock switch is set to the right most position so that the pointer may freely move Turn the Zero Adjust screw to zero the meter display Press the trigger to open jaw Fully enclose only one conductor For optimum results center the conductor in the jaw The analog display pointer will indicate the current reading Insert the black test lead into the negative COM terminal and the red test lead into the positive V terminal Set the display to the highest AC or DC Voltage range using the thumbwheel switch Step down to the lower ranges as necessary in order to keep the rea
6. nts Corporation 285 Bear Hill Road Waltham MA 02451 Copyright 2007 Extech Instruments Corporation All rights reserved including the right of reproduction in whole or in part in any form 1 AM300 V1 1 6 07
7. te 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 3 AM300 V1 1 6 07 Description Meter Description 1 Current clamp 1 Clamp opening trigger Function Selector Switch Scale Display POINTER LOCK switch 3 Meter zero adjust Zero ohms adjust COM negative input jack for black test lead 2 2 tS So X9 d OHMS positive input jack for red lead ae EXTECH e VOLT positive Input jack for red lead 300A AC Clamp Meter O 8 Specifications AC Current 50 60Hz 6 15 60 150 and 300A AC 3 of Full Scale for 50 60Hz AC Voltage 50 60Hz 300 and 600V AC 3 of Full Scale DC Voltage 75V DC 3 of Full Scale Resistance 20000 20 mid scale 3 of Scale Length Clamp jaw opening 1 5 38mm max Display Analog with Zero Adjustment Input Impedance 240kQ 75VDC range 530kO 300VAC range 1MQ 600VAC range AC bandwidth 50 to 60Hz 50 to 400Hz for 15 through 300ACA ranges Ambient conditions Temperature 32 104 F 0 40 C Relative Humidity 8096 Operating Altitude 7000ft 2000m maximum Battery One 1 1 5V AA Battery Fuse 0 5A 250V glass fuse 6
8. uct 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 repair and calibration services for the products we sell Extech also provides NIST certification for most products Call the Customer Care Department for information on calibration services available for this product Extech recommends that annual calibrations be performed to verify meter performance and accuracy TE Support line 781 890 7440 Technical Support Extension 200 E mail support extech com Repair amp Returns Extension 210 E mail repair extech com Product specifications subject to change without notice For the latest version of this User Guide Software updates and other up to the minute product information visit our website www extech com Extech Instrume
Download Pdf Manuals
Related Search