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1. keel TECH IT9121 Power Meter Installation Instructions Model IT9121 keel TECH Notices Itech Electronics Co Ltd 2014 No part of this manual may be reproduced in any form or by any means including electronic storage and retrieval or translation into a foreign language without prior permission and written consent from Itech Electronics Co Ltd as governed by international copyright laws Manual Part Number IT9121 402147 Revision 1 Edition September 22 2014 Itech Electronics Co Ltd Trademarks Pentium is U S registered trademarks of Intel Corporation Microsoft Visual Studio Windows and MS Windows are registered trademarks of Microsoft Corporation in the United States and or other countries and regions Warranty The materials contained in this document are provided as is and is subject to change without prior notice in future editions Further to the maximum extent permitted by applicable laws ITECH disclaims all warrants either express or implied with regard to this manual and any information contained herein including but not limited to the implied warranties of merchantability and fitness for a particular purpose ITECH shall not be held liable for errors or for incidental or indirect damages in connection with the furnishing use or application of this document or of any information contained herein Should ITECH and the user enter into a separate written2. H Ge a O e Ge LBE MINA 8 1 GP IB interface 2 Ethernet port 3 USB port 4 RS232 interface 5 External sync signal interface 6 Power port 7 External sensor connector 8 Negative voltage input 9 Positive voltage input terminals terminals 10 Current input terminal protective cover Copyright Itech Electronics Co Ltd 8 keel EC Chapter III Inspecting the Instrument 3 3 Power on Self Test A power on self test is a process performed by the instrument to confirm that the instrument purchased by user meets our delivery standards and can function properly during normal use Before operation make sure you ve read carefully and understand all the general safety precautions contained in the manual WARNING Before turning on the instrument make sure the mains voltage matches the supply voltage so as to prevent burnout of the instrument Always put the mains plug into the grounded socket Never use an ungrounded wiring board Before operation check if the instrument is grounded properly To prevent burnout of the instrument check the and symbols and maximum voltage and current before connecting the power cord The process of power on self test is illustrated as follows 1 2 Dh Connect the power cord properly and then press Power to turn on the instrument At power on the instrument model and version information are displayed DIEC Digital Povver Meter Version 1 2 Whe
3. you use the instrument If the power cord included in the instrument you purchased does not match the voltage contact the dealer or manufacturer for change dJc China United States amp Europe England IT E171 Canada IT E173 IT E174 IT E172 Copyright Itech Electronics Co Ltd qi keel TECH Chapter III Inspecting the Instrument Chapter III Inspecting the Instrument This chapter presents you an overview of the front and rear panels and the power own checkups that are necessary to ensure the instrument starts and functions properly under the initial conditions 3 1 Keys on the Front Pannel The schematic diagram of front panel and key functions of IT9121 is shown below 1 2 3 4 567 H e K km 179121 DigitallPover Meter 1 Press the and Pj to srcoll the display pages 2 Press theJESC button for secands to lock unlock or Bwitch to ocal mod CI CI CI Ci 3 Press thelMenu into the systemjoperation li io AN LT HAH isa Le SSS 15 14 1312 1110 9 1 USB PCI 2 Display 3 Menu key 4 Waveform Display key 5 Function key 6 Harmonics key 7 Integrator key 8 Setting Knob 9 Arrow keys 10 Enter key 11 Hold ESC key 12 Set key 13 Image Save key 14 Menu key 15 Power switch 3 2 Rear Panel The schematic diagram of rear panel and key functions is shown below 4 e Pow e 100 240V AC 50VA ai TERMINALS LAIN NA A
4. A 1V Therefore the measurement range of the current sensor must be EXT2 and the Conversion Ratio is set at lOmV A Power Meter AC input External input terminal of current Current Shunt Copyright Itech Electronics Co Ltd Ly Bit o BER ART Li LEI L Connect the power supply external current sensor electronic load and IT9121 Power Meter as shown in the wiring diagram 2 Turn on the power meter 3 Select Menu gt SETUP gt EXT SEN SET to access the External Sensor Setup interface r Mes F F L F USB OFF 0001 000 OFF E Er SETUP AVERAG EXT SEN OTHER INRUSH INFO SET SET SET SET 4 First press A V o select ExSENSOR2 Then press ON to turn on the external current sensor and set the Conversion Ratio at 10mV A using the knob Aes 00 34 F F L F USB j OFF 0001 000 ON 0010 000 AVERAG EXT SEN OTHER INRUSH SET SET SET SET 5 Press Enter to save the settings 6 Press Esc to exit the settings and press A RANGE on the Integ page to query the settings End Copyright Itech Electronics Co Ltd 18 Contact Information Ttech Electronics Co Ltd Address 108 XiShangiao South Road Yuhuatai District Nanjing Jiangsu China Tel 86 25 52415098 Fax 86 25 52415268 E mail sales itechate com Copyright Itech Electronics Co Ltd 19
5. MAX J CURRENT pa Ge 8 MAX o I 100 240V AC SOVA A TERMINALS A I gd ce Saz E CE OX S RE 1 eae l 2V2 MAX EXT 1 Current input terminals 2 Voltage input terminals 3 Connect the circuit under measurement as shown in the wiring diagram below Power y apa LOAD CAUTION Use measurement cables satisfying the rated conditions and with dielectric strengths and current capacities that are appropriate for the voltage and current being measured Refer to IT9121 Power Meter User s Manual for detailed specifications of conductor e Example when making measurements on a current of 20A use copper wires that 2 have a conductive cross sectional area of 4mm or greater e Attaching a measurement cable to the instrument may cause radio interference in which case the user 1s required to take proper protective measures 4 For safety reasons after you connect the circuit under measurement attach the protective cover over the current input terminal to prevent contact with the terminal during measurement End Copyright Itech Electronics Co Ltd 16 4 3 Wiring the Circuit under Measurement When Using Current Sensors If the maximum current of the circuit under measurement exceeds the measurement range you can measure the current of the circuit by connecting a dual circuit external current sensor to the external current sensor input connector of the instrument WARNING e When using an externa
6. agreement with warranty terms covering the materials in this document that conflict with these terms the warranty terms in the separate agreement shall prevail Technology Licenses The hardware and or software described herein are furnished under a license and may be used or copied only in accordance with the terms of such license Restricted Rights Legend U S Government Restricted Rights Software and technical data rights granted to the federal government include only those rights customarily provided to end user customers ITECH provides this customary commercial license in software and technical data pursuant to FAR 12 211 Technical Data and 12 212 Computer Software and for the Department of Defense DFARS 252 227 7015 Technical Data Commercial Items and DFARS 227 7202 3 Rights in Commercial Computer Software or Computer Software Documentation Safety Notices CAUTION A CAUTION sign denotes a hazard It calls attention to an operating procedure or practice that if not correctly performed or adhered to could result in damage to the product or loss of important data Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met WARNING A WARNING sign denotes a hazard It calls attention to an operating procedure or practice that if not correctly performed or adhered to could result in personal injury or death Do not proceed beyond a WARNING sign until th
7. appropriate power IT E173 IT E174 cord that matches the specifications of power socket used in the area Refer to the Section 2 4 Connecting the Power Cord for details of such specifications Power cord It contains IT9121 Power Meter Installation Instructions User s Manual Programming and Syntax Guide and other user documentations Nowe II ial Notices instrument Packing List List Da a ee It lists all the It lists all the package contents contents Ex factory Test It is the test report of the instrument Report before delivery Certificate of Compliance LL sor Upon verification of the shipment keep the package and relevant contents thereof in a safe place When returning the instrument for warranty service or repair the specified packing requirements shall be met Refer to 1T9121 User s Manual for detailed requirements on returns IT9121 AC Power Meter is supplied with the following optional accessories sold separately Remarks IT E151 Rack To mount the instrument on a special rack user mount kit may select this optional Refer to the Section 2 3 Rack Mounting for details of installation Copyright Itech Electronics Co Ltd 2 Chapter II Installing the Instrument IT9120 Power Meter can be either placed directly on a desktop or mounted on the rack supplied as an optional accessory 2 1 Adjusting the Handle The instrument 1s equipped with a handle for user to easily carry and plac
8. e indicated conditions are fully understood and met A NOTE sign denotes important hint It calls attention to tips or supplementary information that is essential for users to refer to keel TECH Quality Certification and Assurance We certify that IT9121 power meter meets all the published specifications Warranty ITECH warrants that the product will be free from defects in material and workmanship under normal use for a period of one 1 year from the date of delivery except those described in the Limitation of Warranty below For warranty service or repair the product must be returned to a service center designated by ITECH e The product returned to ITECH for warranty service must be shipped PREPAID And ITECH will pay for return of the product to customer IT9121 Power Meter Installation Instructions e Ifthe product is returned to ITECH for warranty service from overseas all the freights duties and other taxes shall be on the account of customer Limitation of Warranty This Warranty will be rendered invalid if the product 15 e Damaged resulting from customer wired circuits or customer supplied parts or accessories e Modified or repaired by customer without authorization e Damaged resulting from customer wired circuits or use in an environment not designated by us e The product model or serial number is altered deleted removed or made illegible by customer e Damaged as a result of accidents includin
9. e it The handle can be adjusted in three manners as shown in the figure below To adjust the handle first pull out the handle gently toward the left and right sides of the instrument and then rotate it slowly to its alignment keys Horizontal Position Place the instrument horizontally on a desktop Adjusting the Position 1 Pull out the handle to a rotatable state as shown below DM Mirant Ell 2 Rotate the handle to the desired position as shovvn belovv Copyright Itech Electronics Co Ltd 3 3 Place the instrument on a desktop as shown below End 2 2 Removing the Handle To mount the instrument on a rack first remove the handle from the instrument The handle can be removed following the procedures below 1 Rotate the handle to the position as shown in the following figure LIC a EN ore The handle can be easily removed from the alignment hole and key between the handle and the instrument 2 Pull out the handle toward the left and rights sides of the instrument from the alignment hole EN nore When mounting or removing the handle do not squeeze it too hard and mind your hand End Copyright Itech Electronics Co Ltd 4 2 3 Rack Mounting IT9121 Power Meter can be mounted on a standard 19 rack ITECH provides user with IT E151 rack an optional mount kit A standard 19 rack can accommodate two power meters The detailed mounting procedures are sho
10. esign was approved The instrument complies with the WEEE Directive 2002 96 EC marking requirement This affix product label indicates that you must not discard the electrical electronic product in domestic household waste This symbol indicates the time period during which no hazardous or toxic substances are expected to leak or deteriorate during normal use The expected useful life of the product is 10 years The product can be used safely during the 10 year Environment Friendly Use Period EFUP Upon expiration of the EFUP the product must be immediately recycled 2002 96 EC Waste Electrical and Electronic Equipment WEEE Directive This product complies with the WEEE Directive 2002 96 EC marking requirement This affix product label indicates that you must not discard the electrical electronic product in domestic household waste Product Category With reference to the equipment classifications described in the Annex of the WEEE Directive this instrument is classified as a Monitoring and Control Instrument To return this unwanted instrument contact your nearest ITECH office Declarations of Compliance IT9120 Power Meter complies with the following EMC electromagnetic compatibility safety and environmental standards EC Declaration of Conformity EMC The instrument meets intent of EC Directive 2004 108 EC for electromagnetic compatibility EMC Compliance was demonstrated to the following specificatio
11. g but not limited to lightning moisture fire improper use or negligence Safety Symbols Alternating current OFF power Both direct and alternating current o Protective earth ground terminal Power off state Earth ground terminal Reference terminal Ao Warning refer to this manual for specific Negative terminal Warning or Caution information Copyright Itech Electronics Co Ltd i Kell EGH Safety Precautions The following safety precautions must be observed during all phases of operation of this instrument Failure to comply with these precautions or specific warnings elsewhere in this manual will constitute a default under safety standards of design manufacture and intended use of the instrument ITECH assumes no liability for the customer s failure to comply with these precautions WARNING IT9121 Power Meter Installation Instructions s Do not use the instrument if it is damaged Before operation check the casing to see whether it cracks or is not applied with sufficient plastics Do not operate the instrument in the presence of inflammable gasses vapors or dusts e The maximum operating voltage and current of the instrument are 600V and 20A respectively Exceeding these limits will lead to burnout of the instrument e Make sure to use the power cord supplied by ITECH e Check all marks on the instrument before connecting the instrument to power supply e Turn off the instrument and the opera
12. he measured current is relatively small is relatively large U Power e fia i U l Supply es LOAD Copyright Itech Electronics Co Ltd 14 e Voltage input terminals The terminals are safety banana jacks female Only insert a safety terminal whose conductive parts are not exposed into a voltage input terminal e Current input terminals The terminals are binding posts and the screws are M6 Either wind a wire around a screw or pass a crimped terminal through the screw axis and then tighten firmly with the terminal knob Connection Procedures The procedures of wring the circuit when measuring relatively small current are shown as follows Remove the protective cover over the current input terminals a NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNINNNNNINNNINNININIIININIININIINININININININININININININININININININININININININININININININININININININININININININININININININININININININININININININININININININININIII D l gag LAN Q USB RS232 Iess Iess Synchronous 600VMAX Wa 100 240V AC SOVA A TERMINALS A WS A Ze ee X A ETT MAX e CE A a D KG 2V MAX A EXT S ere wn UU ee Oe ee eee A DAO SS Protective Cover The current input and voltage input terminals on the rear panel are shown as follows Copyright Itech Electronics Co Ltd 15 IEEE 488 LAN Q gt USB RS232 600V
13. ied in IEC 61000 4 6 6 This specification C is applied to 70 voltage drop in 25 cycles and 0 voltage interruption in 250 cycles subject to IEC 61000 4 11 Copyright Itech Electronics Co Ltd iV keel TECH IT9121 Power Meter Installation Instructions TABLE OF CONTENTS Quality Certification and Assurance 1 NYELET EI EE l Cn Onor e EE 1 SE DO EE 1 DC l ICC 0 aa aia ag na paga aga Na aa aaa aa nan aaa GU KEN ag A ENE ee KAE ANTENGE a TAA ARENG nan aja ga Ba eee eee nang ajag aan 2 EE 2 Regulatory EN e EC 3 Waste Electrical and Electronic Equiment WEEE Directive ccccceceeeesseseseesesessssesessseseseseeeseeeeeeeeesaas 3 Declarations OF Comp E Sasana kanan a aaa an a Ban an ANK E AA ah KB ga anah E E A E A S 3 Ek Eft 1 LEADOTT MN iere 1 L2 Document EE 1 ka Product ONS EE 1 LA NEPI me ES DIEC TT ss kaanan aa ag aba E EA a BA ene AK nee aa Na aaa ah aa a eee aa a 2 Chapter IT Installin the Instromieni eege ege gege teta 3 2 1 Adjusting the Handle eeesesiansosososmessosamesomenes i am nassanasm nsttantsniseenasientsysssssesnestt 3 EE e ING TS ENT E 4 DS SCIC ee 3 DC onnecine he Power E 6 Chapter III Inspecting the Instrument sssssssccccccssssssssscsscccccccccssssssscccccccscsssssscccsssssssees 8 3A Keys on mie Front Panie EE 8 SE PAT EE 8 POV al a eyo Co EC ere teta enn aa ee ee gi aana aa aaa a ene ened eae ne ene eee aa ees eee 9 SC e 11 0 EE 11 3 3 Replacing th BUS kawasana
14. ke sure to fasten the input terminal screws securely so that cables do not come loose When connecting cables to the external current sensor input terminals only connect cables that have safety terminals that cover their conductive parts Also make sure to fasten the input terminal screws securely so that cables do not come loose When connecting a measurement cable from an external current sensor to an external current sensor input connector remove the cables connected to the current input terminals Also when the voltage of the circuit under measurement is being applied to the external current sensor input terminals do not touch the current input terminals Doing so may impair the measurement accuracy or cause personal injuries When using an external current sensor make sure to use a sensor that comes in a case The conductive parts and case should be insulated and the sensor should have enough dielectric strength for the voltage of the circuit under measurement CAUTION Use measurement cables satisfying the rated conditions and with dielectric strengths and current capacities that are appropriate for the voltage and current being measured Example when making measurements on a current of 20A use copper wires that 2 have a conductive cross sectional area of 4mm or greater Attaching a measurement cable to the instrument may cause radio interference in which case the user 1s required to take proper protective measures Cop
15. l current sensor do not remove the protective cover on the current input terminals to prevent contact with the terminal during measurement e Remove the measurement cable connected to the current input terminal Because the external current sensor input terminal and the current input terminal are connected internally connecting both terminals simultaneous may result in measurement errors or cause damage to the instrument Also when the voltage of the circuit under measurement is being applied to the external current sensor input terminals do not touch the current input terminals Doing so may impair the measurement accuracy or cause personal injuries The external current sensor connected to the instrument may have either a Constant Range or an Auto Range e Constant Range EXTI CF 3 2 5V SV 10V CF 6 1 25V 2 5V SV EXT2 CF 3 50mV 100mV 200mV 500mV 1V 2V CF 6 25mV 50mV 100mV 250mV 0 5V 1V e Auto Range The measurement range can switch automatically depending on the amplitude of input signal Connection Procedures Connect an external current sensor with a measurement range appropriate for the amplitude of measured current When the measured current is 100A select a current sensor with an output voltage not exceeding this limit Assuming that the output voltage generated by 1A current flowing the current sensor is X mV Conversion Ratio the maximum voltage generated by 100A flowing a 10mV current sensor is 10mV Ax100
16. n aka ee njana anak aha a da gha eag eee an akena ka kaag anaa alaga pah a aaa Da ena naka wah 11 Chapter IV Wiring the Circuit under Measurement oo0000000000000000000000000000000000000000000 0000000000 13 4 1 Precautions when Wiring the Circuit cama ai Gaeiadai aa taadmamenn ia ds i asemst jus tsmiucmsnnnts mn ts 13 4 2 Wiring the Circuit under Measurement for Direct Input 14 4 3 Connecting the Circuit under Measurement When Using Current Sensors 17 Copyright Itech Electronics Co Ltd V Chapter I Introduction 1 1 About the Manual This manual is your guide to install IT9120 Power Meter and contains the following information e Verifying the Shipment e Adjusting the Handle e Removing the Handle e Rack Mounting e Connecting the Power Cord e Keys on the Front Panel e Rear Panel e Power on Self Test e Zero Calibration e Replacing the Fuse e Connecting the Circuit under Measurement 1 2 Document Information Installation Instructions are included in the supporting documentations of the instrument which can be accessed via the CD supplied with the instrument or ITECH official website Manual Title Description IT9121 Power Meter Explain how to inspect install and connect the Installation Instructions instrument this manual IT9121 Power Meter Explain how to conduct measurements through front User s Manual panel operations IT9121 Programming and Introduce the communication protocol and reference Synta
17. n startup completes successfully the screen displays the following information Copyright Itech Electronics Co Ltd 9 keel TECH IC TAN ec F F L F USB Chapter III Inspecting the Instrument A AUTO MAX HOLD Gad ON 4 Select Menu to access the System Configuration interface Press SYSTEM to access the SYSTEM INFO interface on which the product model serial number computer software version and other information are displayed IC Mes F F L F USB T9121 602173010697110001 1 02 Aug 22 2014 17 20 54 01 03 02 01 02 03 ac bc cd 30000 SYSTEM COMM SYSTEM INFO CONFIG CONFIG 5 IC Mes F F L F USB Please Press START to Start System Self Test It lasts 5 seconds at most e Press START to start self test of the system including LCD LED Display and RAM Copyright Itech Electronics Co Ltd 10 P mel EGH Chapter III Inspecting the Instrument An OK symbol following each test item denotes the test result is acceptable while a NG symbol denotes the test result is subject to user s self judgment such as whether LED displays clearly or not e Press KEY TEST to check whether keys function properly Press all the keys on the front panel if the icon corresponding to a key shows a black shade it means the key functions properly End 3 4 Zero Calibration Zero calibration is a feature used to create a state under which input signal is adjusted to zero thro
18. ns as listed in the Official Journal of the European Communities EN 61326 1 2006 Electrical equipment for measurement control and laboratory use EMC requirements e CISPR 11 2003 Radiated and conducted emissions Group 1 Class A e JEC 61000 4 2 2001 Electrostatic discharge immunity e TEC 61000 4 3 2002 Radiofrequency electromagnetic field immunity Copyright Itech Electronics Co Ltd iii H IT9121 Povver Meter Installation Instructions e IEC 61000 4 4 2004 Electrical fast transient burst immunity e IEC 61000 4 5 2001 Power line surge immunity e JEC 61000 4 6 2003 Immunity to conducted disturbances induced by radiofrequency e IEC 61000 4 11 2004 voltage dips short interruptions and voltage variations immunity EN 61000 3 2 2006 Harmonic emission on AC pover line EN 61000 3 3 1995 Voltage change fluctuation and flicker 1 The product is intended for use in non residential non domestic environments Use of the product in residential domestic environments may cause electromagnetic interference 2 Connection of the instrument to a test object may produce radiations beyond the specified limit 3 Use high performance shielded interface cable to ensure conformity with the EMC standards listed above 4 Trace bloom not exceeding 4 divisions pk to pk may be induced under the test conditions specified in IEC 61000 4 3 5 Trace bloom not exceeding 1 division pk to pk may be induced under the test conditions specif
19. ock to the original position as illustrated below End Copyright Itech Electronics Co Ltd 12 hm mel EGH Chapter IV Wiring the Circuit under Measurement Chapter IV Wiring the Circuit under Measurement IT9121 Power Meter is an instrument used to measure electric energy factors including voltage current and power of various electrical appliances This chapter explains how to wire a typical circuit under measurement User may select to wire the circuit either for direct input or using current sensors depending on the amplitude of the measured voltage or current 4 1 Precautions when Wiring the Circuit WARNING To prevent electric shock turn the circuit under measurement off before connection Always put the mains plug into the grounded socket Never use an ungrounded wiring board Before connecting the circuit make sure the electronic load is grounded properly Do not wire a current circuit to the voltage input terminal or a voltage circuit to the current input terminal Strip the insulation covers of the measurement cables so that when they are wired to the input terminals the conductive parts bare wires do not protrude from the terminals Also make sure to fasten the input terminal screws securely so that cables do not come loose When connecting measurement cables to the voltage input terminals only connect measurement cables that have safety rubber terminals that cover their conductive parts Also ma
20. tion system before connecting to the I O terminal e Do not use the instrument if the detachable cover is removed or loosen s Do not connect the instrument to any cable or terminal block before self testing e To prevent the possibility of accidental injuries be sure to use the power adapter supplied by the manufacturer only e Never use the instrument with a life support system or any other equipment subject to safety requirements CAUTION e Failure to use the instrument as directed by the manufacturer may render its protective features void e Always clean the casing with a dry cloth Do not clean the internals e Make sure the vent hole is always unblocked Environmental Conditions The instrument is designed for indoor use and an area with low condensation The table below shows the general environmental requirements for the instrument Environmental Conditions Requirements Operating temperature 5 C 40 C Operating humidity 20 80 non condensation Storage temperature 20 C 50 C Altitude lt 2 000m Pollution degree Pollution degree 2 LL yore To make accurate measurements allow the instrument to warm up for 30 min Copyright Itech Electronics Co Ltd ii keel T EGH IT9121 Power Meter Installation Instructions Regulatory Markings The CE mark indicates that the product complies with all the relevant European legal directives The specific year if any affixed refers to the year when the d
21. ugh the internal circuit meanwhile the electrical level is set to zero EN nore When the measurement range and input filer remain constant for long the zero level will change with the ambient environment conditions In this case zero calibration is recommended To make accurate measurements allow the instrument to warm up for at least 30 min before zero calibration In addition make sure the ambient temperature is controlled within the specified range The detailed procedures of zero calibration are shown as follows L Connect the power cord properly and then press Power key to turn on the instrument 2 Select Menu to access the System Configuration interface IC EEIIUSP Use Softkey to Select the Item Menu SYSTEM CAL ZERO 3 Select CAL ZERO gt START to start zero calibration Wait 1 min for the zero calibration until Cal Zero is Completed displays End 3 5 Replacing the Fuse During normal use of the instrument you need to replace a blown fuse where necessary by following the procedures below 1 First pull out the power cord and then take out the fuse block from the power cord jack with a small screwdriver as shown below Copyright Itech Electronics Co Ltd 11 2 Have a visual inspection of the fuse to see whether it is burnt out if yes replace it with another fuse of the same specification T1 25A 250V fuse is used for IT9121 Power Meter 3 After replacement mount the fuse bl
22. wn as follows Mounting Procedures 1 Remove the handle by following the procedures described in the Section 2 2 Removing the Handle 2 Peel off the light grey stickers over the mount positions on both sides of the instrument to expose the rack mount attachment holes LO vor You may tear one corner of the sticker using a sharp object and then peel it off with hand RR Fix the plastic connector onto the rack mount attachment holes at the top right corner of the first power meter with screws as shown below 5 Fix the plastic connector onto the rack mount attachment holes on the lower part of the second power meter with screws as shown below a First remove the rack blank panel as shown in the following figure Copyright Itech Electronics Co Ltd 5 c Fix another plastic connector onto the rack mount attachment holes at the left bottom corner of the second power meter with screws as shown below 6 Fix the three attachment holes of the second power meter on the rack with screws End 2 4 Connecting the Power Cord Connect the power cord after checking that the power switch of the instrument is turned OFF Only use the power cord supplied as a standard accessory A summary of connection procedures is given below Copyright Itech Electronics Co Ltd 6 Select from the flowing Schedule of Power Cord Specifications an appropriate power cord that matches the voltage for the area in which
23. x Guide commands applicable to remote operation 1 3 Product Profile IT9121 Power Meter is a precision power analyzer characterized by powerful and diversified features It is designed for clearly and correctly measuring the power and energy consumption of various electrical appliances The maximum input voltage and current of the instrument are 600Vrms and 20Arms the measuring bandwidth 1s I00RHZ and the measurement accuracy is 0 1 It can meet user s various measurement demands By virtue of its DSP FPGA dual core processing architecture IT9121 Power Meter can rapidly and accurately calculate harmonic parameters of signals In addition it is equipped with USB GPIB RS232 and LAN communication interfaces to accommodate user s different requirements on communication Moreover a USB peripheral component interface is provided for user to store measurement parameters in an external storage medium Refer to IT9121 User s Manual for details of general specifications and technical specifications Copyright Itech Electronics Co Ltd 1 1 4 Verifying the Shipment Unpack the box and check the contents before operating the instrument If wrong items have been delivered if items are missing or if there is a defect with the appearance of the items contact the dealer from which you purchased the instrument immediately The package contents include Table 1 1 Checklist of Package Contents IT E171 IT E172 User may select an
24. yright Itech Electronics Co Ltd 13 hm mel EGH Chapter IV Wiring the Circuit under Measurement 4 2 Wiring the Circuit under Measurement for Direct Input Under the condition that the measured voltage and current are within the measurement range when the voltage is 600V or less and the current is 20A or less you may measure the current and voltage of the circuit for direct input There are several patterns of terminal wiring positions shown in the following figures for wiring the voltage input and current input terminals Depending on the terminal wiring positions the effects of stray capacitance and the effects of the measured voltage and current amplitudes may become large To make accurate measurements refer to the factors below when wring the voltage input and current input terminals e Effects of stray capacitance When you are measuring a single phase device you can minimize the effects of stray capacitance on measurement accuracy by connecting the instrument s current input terminal to the side that is closest to the earth potential of the power supply SOURCE as shown below LOAD e Effects of the measured voltage and current amplitudes When the measured current is relatively large connect the voltage input terminal to the side that is closest to the load When the measured current is relatively small connect the current input terminal to the side that is closest to the load When the measured current When t
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