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User`s Manual - Test Equipment Depot

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1. 0 Time 1 Manual INTEgrate STARt TIME Function Sets queries the starting time of measurement Syntax INTEgrate STARt TIME INTEgrate STARt TIME lt NRf1 gt NRf2 lt NRf3 gt lt NRf 4 gt NRf5 NHf1 Year 2000 to 2099 lt NRf2 gt Month 1 to 12 NRf3 Day 1 to 31 lt NRf4 gt Hour 0 to 23 lt NRf5 gt Minute 0 to 59 INTEgrate STATe Function Queries the measurement status Syntax INTEgrate STATe INTEgrate STATe lt NR1 gt 0 Stop 1 Ready for measurement 2 Integration in progress INTEgrate STOP Function Queries all the settings relating to the end of measurement Syntax INTEgrate STOP INTEgrate STOP EXECute Function Stops measurement Function Starts measurement Syntax INTEgrate STOP EXECute Syntax INTEgrate STARt EXECute IM CW120 E App 2 15 E spuewwoy uoneoiunululo2 Appendix 2 Communication Commands INTEgrate STOP TIME Function Sets queries the ending time of measurement Syntax INTEgrate STOP TIME INTEgrate STOP TIME lt NRf1 gt NRf2 NRf3 lt NRf 4 gt NRf5 lt NRf1 gt Year 2000 to 2099 lt NRf2 gt Month 1 to 12 lt NRf8 gt Day 1 to 31 lt NRf4 gt Hour 0 to 23 lt NRf5 gt Minute 0 to 59 INTEgrate STORe Function Queries all the settings relating to output destinati
2. 5 8 IM CW120 E 5 5 Wiring Check Function When an error is displayed refer to the table on page 5 8 and check the meaning of the error Check and correct the connections then press the key to carry out the wiring check again To return to the measurement screen press the key Example of error indications Upper No current input Lower Voltage phase sequence error E CC Hz when frequency error WIRING key Oye C pou O C e i MD J START amp STOP key IM CW120 E 5 9 Chapter 6 Setting Ranges and Wiring Method 6 1 Ranges and Display Digits The following describes the voltage current power and electric energy ranges Voltage Range 150 300 450 V Current Range 96033 clamp on probe 5 10 20 50 A 96030 clamp on probe 20 50 100 200 A 96031 clamp on probe 50 100 200 500 A 96032 clamp on probe 200 500 1000 A Range of Active and Reactive Powers The range of active and reactive powers is determined by the voltage range current range and wiring method set as follows Wiring Method Phase Lines Power Range Single phase two wires Voltage range x current range Single phase three wires Three phase three wires Voltage range x current range x 2 Three phase four wires only for CW121 Voltage range x current range x 3 IM CW120 E 6 1 Doum DUU pue sobuey Pumes B 6 1 Ranges and Display Digits Range Table Tabl
3. 7 10 IM CW120 E 7 2 Setting Each ltem 7 2 6 Changing Date and Time DATE Description The CW120 121 have a clock which is adjusted to the Japan standard time by default factory setting To change the date and time follow the procedure below Procedure 1 Using the Y D keys in the setting item selection screen make the DATE mark and the current data and time settings appear on the screen Then press the key The day indication flashes Date and Time Change Screen Year month and day Hour minute second MEAS SET key UP DOWN LEFT RIGHT keys ENTER key ESC key 2 Using the X keys select an item year month day hour minute or second you want to change The selected item flashes 3 Using the VY keys change the value of the selected item When changing a number pressing the S X7 key continuously will make quick changes 4 After making all necessary changes press the key The date and time settings are changed and the setting item selection screen returns To cancel the changes press the key The setting item selection screen also returns TIP For the year set the last two digits The range of the year setting is 00 to 99 years 2000 to 2099 To make the changes effective press the key synchronously with a time signal from a TV broadcast or the like IM CW120 E 7 11 sbumes Huye x 7 2 Setting Each Item
4. Direct Current This symbol indicates DC voltage current PO Alternating Current This symbol indicates AC voltage current ON This symbol indicates On power O OFF This symbol indicates Off power Double Insulation This symbol indicates double insulation N WARNING Indicates a hazard that may result in the loss of life or serious injury of the user unless the described instruction is abided by N CAUTION Indicates a hazard that may result in an injury to the user and or physical damage to the product or other equipment unless the described instruction is abided by A NOTE Indicates information that is essential for handling the instrument or should be noted in order to familiarize yourself with the instrument s operating procedures and or functions TIP Indicates information that complements the present topic SEE ALSO Indicates the reference location s for further information on the present topic IM CW120 E o Precautions for Safe Use of the Instrument Strictly observe the following cautionary notes in order to avoid the risk of injury or death of personnel or damage to the instrument due to such hazards as electrical shock NWARNING Removal of Case from the Instrument Do not remove the case from the instrument or disassemble modify the instrument itself Some parts of the inside of the instrument contain high voltage and ther
5. Rated supply voltage 100 to 240 V AC Allowable supply voltage range 90 to 264 V AC Rated power supply frequency 50 or 60 Hz Allowable supply frequency range 48 to 63 Hz Maximum power consumption 8 VA at 240 V AC IM CW120 E 4 1 HOIuO 1ewog Buluin pue Addne samog Durnoouuo5 D 4 1 When Using AC Power Supply A NOTE When plugging and unplugging the power cord into from the CW120 or CW121 ensure that the PC card eject button is depressed The CW120 or CW121 will not work if the fuse built into the power supply circuit of the CW120 or CW121 has blown Built in fuses cannot be replaced by the user For replacement contact the vendor from which you purchased the instrument 4 2 IM CW120 E 4 2 When Supplying Power from Voltage Input A NOTE The 98030 power supply cable is not applicable to CE and UL pending Before Connecting Power Supply There is a danger of electric shock or damage to the meter Observe the following warning notes N WARNING Use only the optional power cable part No 98030 supplied by the manufacturer Make sure the voltage of the circuit to be measured matches the rated supply voltage i e 100 to 240 V AC Before connecting to the circuit to be measured make sure the power to the circuit is turned off Before connecting the power cable make sure the power switch of the CW120 or CW121 is turned off Do not place any load on
6. Upper Lower Lower Rms voltage Rms current Active power Reactive power Power factor Frequency Upper Electric energy Elapsed time of integration Using UP DOWN LEFT RIGHT keys AD WEA 8 2 IM CW120 E 8 2 Switching Display Contents Differences in Display Contents Depending on Wiring Method Display contents differ depending on the wiring method as follows Displayed Item Phase Wires mined Screen Screen Screen Screen Screen Screen osition 1 2 3 4 5 6 Upper row Vt WI PF Wh Single phase two wires 1 2W t EE A1 Var Se TIME Single phase three wires 1 3W Upper row Md fj Al W PF Wh Three phase three wires 323W Lower row V2 A2 Var Hz TIME Upper row Vt V3 A2 wJ PF Wi Threephass four Wires 384W LT MO A1 A3 Var Hz TIME Name Unit Appearing Next to Each Value V1 V2 V3 Input rms voltages A1 A2 A3 Input rms currents corresponding to CH1 CH2 and CH3 W Var PF Hz Wh TIME respectively Active power with minus sign in case of negative value Reactive power with minus sign in case of negative value Power factor with minus sign in case of negative value Frequency Active electric energy Elapsed time of integration 34W 13W or 323W 102W TIP The active electric energy and elapsed time of integration are displayed a
7. Maximum Display Digits 4 Rated Power x VT Ratio x CT Ratio x 1 3 Decimal Point Position and Unit 975 to 999 9 W 999 9 W 1 to 9 999 W 9 999 W 10 to 99 99 W 99 99 W 100 to 999 9 W 999 9 W 1 to 9 999 kW 9 999 kW 10 to 99 99 kW 99 99 kW 100 to 999 9 kW 999 9 kW 1 to 9 999 MW 9 999 MW 10 to 99 99 MW 99 99 MW 100 to 999 9 MW 999 9 MW 1 to 9 999 GW 9 999 GW 10 to 99 99 GW 99 99 GW 100 to 999 9 GW 999 9 GW 1000 to 9999 GW 9999 GW Multiply by 1 3 only when the CT or VT ratio is a value other than 1 IM CW120 E Doum DUU pue sobuey Pumes e 6 1 Ranges and Display Digits TIP For reactive power the same table as for the power applies but the units of measurement are different Units of reactive power Var kVar MVar GVar Power Factor Maximum Display Digits 4 Power Factor Decimal Point Position and Unit 1 to 1 1 000 Decimal Point Position and Unit for Electric Energy The decimal point position and unit of measurement for electric energy can be set via the screen see Section 7 2 16 Selecting Decimal Point Position and Unit for Electric Energy Decimal point Selectable from 000 000 0000 00 00000 0 and 000000 Unit Selectable from Wh kWh MWh and GWh By selecting STANDARD you can also let the CW120 121 automatically set them as follows Rated Power x VT Ratio x CT Ratio D
8. NRf3 NHf1 Year 2000 to 2099 lt NRf2 gt Month 1 to 12 lt NRf3 gt Day 1 to 31 SYSTem DISPlay Function Queries the screen currently displayed SYSTem DISPlay lt NRf gt 0 Instantaneous value or electric energy measurement screen 1 Wiring check Syntax SYSTem KLOCk Function Sets queries whether the key lock function is set to ON or OFF SYSTem KLOCK SYSTem KLOCk Boolean Syntax SYSTem RESEt Function Executes system resetting IM CW120 E App 2 13 E spuewwoy uoneoiunuluo2 Appendix 2 Communication Commands Syntax SYSTem RESEt SYSTem SCALing Function Queries all the settings relating to scaling Syntax SYSTem SCALing SYSTem SCALing CT Function Sets queries the CT ratio Syntax SYSTem SCALing CT SYSTem SCALing CT lt NRf gt lt NRf gt 1 00 to 10000 00 SYSTem SCALing VT Function Sets queries the VT ratio Syntax SYSTem SCALing VT SYSTem SCALing VT lt NRf gt NHf 1 to 10000 SYSTem TIME Function Sets queries the clock Syntax SYSTem TIME SYSTem TIME lt NRf1 gt NRf2 lt NRf3 gt lt NRf1 gt hour 0 to 23 lt NRf2 gt minute 0 to 59 lt NRf8 gt second 0 to 59 SYSTem VOLTage Function Queries all the settings relating to the voltage range Syntax SYSTem VOLTage SYSTem VOLTage RANGe Function Sets queries the voltage range
9. LMO 10 M00 021 peiueuifes JeAug qo Jojejeq SS0J0 0J97 perejos oojg Indu eGeyoA c App 1 1 IM CW120 E Appendix Appendix 2 Communication Commands Segun re App 2 2 1 1 Messages EE App 2 2 1 2 Commiands EE App 2 4 UN WR E App 2 5 1 4 E App 2 6 1 5 Messages on RS 485 sessi eeenn nnne nnne App 2 8 1 6 Communication Commands esee App 2 9 1 7 Detailed Description of Communication Commands App 2 12 1 7 1 COMMunicate Group essseseeeeenenen nennen App 2 12 1 72 c SYSTEM Groups i c c med pe mette e Des eq orden p eae App 2 13 LZ INTEgrate Group ones d aede hodie eg App 2 15 17 4 IMEAS re GOUD E App 2 17 1 725 STATUS GrOUD EEN App 2 17 1 76 MEMOTY GrOUD tincnt ce toe iere o App 2 18 17 7 CARD Group 3 uie debi ete oap qmi its App 2 18 17 8 COMMON Group cte nce e tme ede tena tn App 2 19 2 Error Messages cccccsseeeceeensseeeeesenseeeeeesnsseeeeeesnseeeeeeseeseeeeeeseeseeneeees App 2 20 3 Command Effectiveness Tables seen App 2 24 IM CW120 E App 2 1 E spueulUJO2 Uuoieoriunuiulo2 Appendix 2 Communication Commands 1 Commands 1 1 Messages Messages Communication between the CW120 clamp on power meter and a personal computer is carried out in blocks of data called messages Messages sent by
10. One User s Manual ring markers 4 colors x 2 each L4007MG Safety standards EMC emission EMC immunity Compliant with EN61010 1 EN61010 2 032 e Overvoltage category Ill CAT Ill max input voltage 300 Vrms Pollution degree 2 Compliant with EN5501 1 Group 1 Class A and EN61326 1997 These products are goods in Class A designed for industrial environments For home use the user must implement adequate measures to prevent influences from radio noise emission Compliant with EN61326 1997 Effect on measurement input under immunity environment 20 of range or less IM CW120 E 14 11 H suoneoyi2ods 14 2 Specifications of Clamp on Current Probes Dimensions of 96033 Clamp on Current Probe Unit mm approx inches 25 10 5 0 99 0 41 14 12 IM CW120 E Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com Appendix iagram t Block D Appendix 1 Circui piep Od gt eoepeiu Sgp SH YLM Jepoui 10 Depiaod JON Oll eubis jeu1e1x3 s Jeu S Od gt 1 01 U09 DIE Od INOud33 c c SH OLY Circuit Block Diagram Joyesauay jeubis Bulyoyms ynduy JojeJeuet euis 49019 99A i 9 OV A 0v2 00L yoolg Aiddng jewod 2017 yoolg 1ndu uano
11. TIP f a change to the wiring method setting is incompatible with the conditions derived from other set tings the change is ineffective First change other settings such as the voltage range current range VT ratio and CT ratio then change the wiring method The wiring method cannot be changed during continuous measurement The wiring method cannot be changed when the electric energy count is not zero Pressing the key at this time causes r Z to appear on the screen this will disappear and the measurement screen will return when any key is pressed Clear the electric energy count first For details of how to do this see Section 9 2 3 Clearing Electric Energy Count or Section 7 2 4 Clearing Electric Energy Count and Resetting System in Chapter 7 Making Settings 6 10 IM CW120 E 6 4 Changing Wiring Method Setting For CW121 122W 103W 303W 304W Default 303W SEE ALSO For details of the wiring methods see Chapter 5 Wiring pouiejy DUU pue sobuey Pumes e IM CW120 E 6 11 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com Chapter 7 Making Settings 7 1 Setting Items and Item Selection Setting Items Before starting measurement the following measurement condition and data saving settings should be made as necessary Setting Item Display Mar
12. 450 V SetARange 1108 Set current range 5A 10A 20A 50A 100A 200A 500A 1000A MeasARange 1108 Current measurement range 5A 10A 20A 50A 100A 200A 500A 1000A DOut 0 or 1 Data output Off On Cl E ah 00 sl OY ng Er PO rs On DOut Filename XXXXXXXX File name Up to 8 characters Integ StartDate yyyy mm dd Integration start date yyyy year from 2000 to 2099 mm month dd day Integ_StartTime hh mm ss Integration start time hh hour mm minute ss second Integ_EndDate yyyy mm dd Integration end date yyyy year from 2000 to 2099 mm month dd day Integ_EndTime hh mm ss Integration end time hh hour mm minute ss second Integ_Interval hhhh mm ss Output interval hhhh hours mm minutes ss seconds WhDigit 0to4 Display digits of electric energy Standard 000 000 0000 00 00000 0 000000 WhUnit 0to 3 Display unit of electric energy Wh kWh MWh GWh vn o vn IM CW120 E App 3 7 E peiund Suel ejyeg pue saJnjonus l Appendix 3 File Structures and Data Items Printed Item Title Setting Description Meaning of Settings Vt 1 to 10000 VT ratio Ct 1 00 to 10000 00 CT ratio No 1 to 999 Device number ClampType 0to3 Clamp on probe type 0 50 A probe 1 200 A probe 2 500 A probe 3 1000 A
13. A NOTE When setting the output interval to 2 minutes or less note the following Depending on the number of files residing in the PC card and the free space in it the data at the beginning may not be saved for example after approximately fifty thousand samples have been saved at one second intervals If this occurs Erreli i appears on the screen and data saving is stopped Especially when setting the interval to 1 second make sure that There is no file in the PC card format the PC card to delete all files The PC card is inserted when starting the integration Do not remove the PC card during electric energy measurement Do not activate communication Do not perform excessive key actions Only if data saving to the PC card is enabled see Section 7 2 10 data is saved to the PC card at the specified interval IM CW120 E 7 13 sbumes Huye x 7 2 Setting Each Item 7 2 8 Setting Integration Start Date and Time START Description There are three ways to start integration Automatic starting at the specified time on the specified date Manual starting by pressing the key for one second or more Remote starting by inputting a signal at the external control terminals The following describes the start date and time setting for the first way Procedure 1 Using the Y X D keys in the setting item selection screen make the START mark and the current settings of the start date and time appe
14. Up to 30 files with automatically given names can be saved to a PC card corresponding to file numbers from 000 to 029 attempting to save too many files causes Err tli to appear and the data will be saved to the backup memory The error code will disappear and the measure ment screen will return when any key is pressed If a PC card is not inserted Hr dv appears when integration begins and data will be saved to the backup memory The error code will disappear and the measurement screen will return when any key is pressed When the PC card becomes full the HIAS mark appears and data will be saved to the backup memory For details see Section 7 2 5 Copying and Clearing Backup Memory Contents and Section 9 5 Backup Memory 9 12 IM CW120 E 9 4 Saving Data File Name and Format Data measured during electric energy measurement are saved to a CSV format file and the file name AWTH followed by a number is given automatically and can also be specified using a command via communication The file name can also be specified using a command via communication File name AWTHxxx CSV Name xxx The smallest unused number from 000 to 029 Filename extension Always CSV If data saving to the PC card is enabled the file number of the file to which data is to be saved will be displayed on the screen when starting integration Display When File Name Is Given Automatically CINTEG Integration ma
15. v v wi IDN v v v v w Effective Blank Ineffective App 2 28 IM CW120 E Appendix Appendix 3 File Structures and Data Items Printed EE o TEE App 3 2 2 Measured Data sssccccccsceeecceesseeeeeeessneceeesesseeeeeeensseeeeesenseeeeesnsseeeeeeensne App 3 3 2 1 File Format E App 3 3 SLL FileIdentifler emt teet uns App 3 3 2 1 2 Flle TIype ieget te eren etit App 3 3 2 1 8 Measurement Mode eeesesssseeeeeeeene entente App 3 3 2 1 4 Data Field Titles and Data Formats AAA App 3 4 2 1 5 Records of Power Failure Restoration Information App 3 4 2 2 Print Format siorr aeiiae eaa arn ENa kE nnns App 3 5 2 2 1 Print Item Titles and Data Formats see App 3 5 Bes SOUS oats m App 3 6 3 1 File Format uenenum App 3 6 3 2 Output Format and Data Values esee App 3 7 3 9 Print Format seen RES App 3 9 4 Automatic File Naming eere nennen App 3 10 IM CW120 E App 3 1 E peiund Suel ejeg pue saJnjonus l Appendix 3 File Structures and Data Items Printed 1 Overview There are two types of data sets that may be saved to a file and printed one is measured data and the other is settings Measured data is saved by a user action during instantaneous value measurement or automatically during electric energy measurement 1 Measured Data Manual saving Pressing the SAVE k
16. 0 000E 00 Current 1 A 8 12 0 000E 00 Current 2 A 9 13 0 000E 00 Current 3 A 10 P 0 000E 00 Active power W 11 Q 0 000E 00 Reactive power Var 12 PF 0 000E 00 Power factor 13 F 0 000E 00 Frequency Hz 14 Wh 0 00000E 00 Electric energy Wh 15 Wh 0 00000E 00 Regenerative energy Wh Note An invalid or overflowed value is printed as or OR IM CW120 E App 3 5 E peiund Suel ejeg pue saJnjonus l Appendix 3 File Structures and Data Items Printed 3 3 1 Settings File Format Setting files are text files In the same way as in measured data files the contents of each setting file begin with the file identifier file type number and measurement mode CW12x FileType MeasureMode Wiring SetVRange MeasVRange Vt Ct ClampType No Device BaudRate DataLength Parity StopBit Handshaking x x x X X X X X X X X x x x Setting App 3 6 IM CW120 E Appendix 3 File Structures and Data Items Printed 3 2 Output Format and Data Values Item Title Setting Description Meaning of Settings Wiring 0to 3 Phase lines e Single phase two wires Single phase three wires Three phase three wires two currents Three phase four wires fo SetVRange 1 to 4 Set voltage range 150 V 300 V 450 V MeasVRange 1to4 Voltage measurement range 150 V 300 V
17. 2 MWh 3 GWh IM CW120 E Appendix 2 Communication Commands 1 7 4 MEASure Group The commands in the MEASure group set or query parameters relating to data acquisition in each measurement mode MEASure INTEgrate Function Queries all the settings relating to the communication output data on electric energy measurement Syntax MEASure INTEgrate MEASure INTEgrate ITEM Function Queries all the settings for data items of communication output data on electric energy measurement Syntax MEASure INTEgrate ITEM MEASure INTEgrate ITEM lt measured data items Function Sets queries the ON OFF statuses for data items of communication output data on electric energy measurement Syntax MEASure INTEgrate ITEM lt Measured data items gt lt Measured data items gt 0 V1 1 V2 2 V3 3 11 4 l2 5 13 6 P 7 Q 8 PF 9 F 10 Wh 11 Wh MEASure INTEgrate ITEM ALL Function Sets all effective data items of communication output data on electric energy measurement to ON Syntax MEASure INTEgrate ITEM ALL MEASure INTEgrate ITEM CLEAr Function Resets all effective data items of communication output data on electric energy measurement to OFF Syntax MEASure INTEgrate ITEM CLEAr MEASure INTEgrate ITEM VALUe Function Queries the measured values of the data items that were set to ON using the MEASure INTEgrate ITEM lt items gt MEASure INTEgrate I
18. 7 2 7 Setting Output Interval INTER Description When saving outputting data in the electric energy measurement mode the interval of saving outputting data needs to be set This output interval is set to 30 minutes by default and can be selected from 1 2 5 10 15 and 30 seconds 1 2 5 10 15 and 30 minutes and 1 hour Procedure 1 Using the Y J D keys in the setting item selection screen make the INTER mark and the current interval setting appear on the screen Then press the key The current setting flashes Output Interval Setting Screen Interval MEAS SET key UP DOWN LEFT RIGHT keys ENTER key 7 12 IM CW120 E 7 2 Setting Each Item 2 Using the 0 YV J D keys select the desired interval The displayed interval time changes sequentially as follows nnannn X n mnnn ZE nannan i 2 nmnnna L nnnnnc LILIZILELILI x LE HULL ez DILL ez DUU e DUU 30 min M 1 hr va 1 sec 2 sec 5 sec J lt Jao DH II SI V9 LILELILE UI 10 sec vaffa rnm ann nnm auc UL LL LILILILE 7 15 min 15 sec ao v lt vaffac nn unn 2S nnmnmcnn 2S nnnaann nnn mn YS nnnnan DU DUU UD IL ee HUUCUU m UD DU se LILI 10 min 5 min 2 min 1 min 30 sec 3 After selecting the desired interval press the key The interval is changed accordingly and the setting item selection screen returns To cancel the change press the S key The setting item selection screen also returns
19. Copying Data from Backup Memory When data is saved during electric energy measurement if the PC card becomes full or if the card is removed the measured data is saved to the backup memory This data contained in the backup memory can be copied to a PC card SEE ALSO For details of how to copy data from the backup memory see Section 7 2 5 Copying and Clearing Backup Memory Contents 10 6 IM CW120 E 10 6 Interface with Personal Computer SEE ALSO Data saved in a PC card can be processed on a PC You can process measured data using a spreadsheet application and so on by inserting a PC card containing measured data into the PC card slot of a PC Even when a PC card is left inserted in a CW120 or CW121 the measured data in the PC card can be read from a PC and the setting data can be written from the PC via RS 232 or RS 485 communication Specify which of the interfaces you need when ordering For details of communication see Chapter 11 Communication Functions and Appendix 2 Commu nication Commands For details of the format of saved files see Appendix 3 File Structures and Data Items Printed IM CW120 E 10 7 p129 Od Chapter 11 Communication Functions 11 1 RS 232 A NOTE The RS 232 interface allows the CW120 121 to be connected to a PC or printer RS 232 Interface Specifications Electromechanical specifications Topology Communication method Synchronization Baud
20. FAX 781 665 0780 TestEquipmentDepot com Appendix 2 Communication Commands CARD SEND Function Transfers the contents of the file that was specified using the CARD FILEname and CARD TYPE commands CARD SEND STX ASCII code 02H file contents ETX ASCII code 03H lt RMT gt The STX and ETX are not attached in RS 485 communication Syntax CARD SETTing Function Creates a setting file in the PC card and saves the current settings to it Syntax CARD SETTing lt NRf gt lt NRf gt 0 to 29 file number CARD STATe Function Queries the PC card status Syntax CARD STATe CARD STATe NRf lt NRf gt 0 A card is not set 1 A card is set CARD TYPE Function Sets queries which type of files in the PC card is to be accessed 1 7 8 Common Group CLS ClearStatus Function Clears the error queue Syntax CLS IDN IDeNtify Function Queries the meter model Syntax IDN Description A reply sequence is returned as follows Manufacturer Model Serial No Firmware version Serial No is not returned in actual applications always 0 Syntax CARD TYPE CARD TYPE lt NRf gt lt NRf gt 1 Auto storing file 3 File containing currently measured values 4 Setting file IM CW120 E App 2 19 E spuewwoy uoneoiunululo2 Appendix 2 Communication Commands 2 Error Messages The following descri
21. Only the am key is usable during the key lock state IM CW120 E 12 1 suonoung ueiixny D 12 1 Convenient Functions Clearance of All Settings and Data Keep pressing the and Q keys and turn on the power switch then all settings will be initialized to the defaults and the active electric energy regenerative energy elapsed time of integration and data in the backup memory will be cleared Except the date time and device number Procedure Hold down the Gen and Gi keys and turn on the power switch Keep pressing the and keys until the model number appears on the screen Meter Actions All LCD segments light up and then the model number and version appear Taiata iae A 2 T A3 PF lag Litt 160m Lii Ft A ri kHzTIME Q3 D 7 dm aT DATE IN MERSI STSP STOP DIGIT DEV COM Z i 20 Ven co ben Zem em Lo r cM om Power switch ESC key START amp STOP key Model and Version Display Screen lt Upper Model number lt Lower Version number ALL CLEAr appears on the screen and then the measurement screen is displayed All Clear Screen e Measurement Screen m 11 v iL 1 iL e em w C kA S I i Ari ALI A I lt Upper Rms voltage Lower Rms current 12 2 IM CW120 E 12 2 Using Optional Printer Connecti
22. Saving Not Saving MEAS SET key UP DOWN LEFT RIGHT keys ENTER key ESC key 2 Using the O6 Y X D keys select r EL oo if you want to enable saving or rELaFF if you want to disable saving 3 After making a change press the key The change is made effective and the setting item selection screen returns To cancel the change press the key The setting item selection screen also returns A NOTE When the saving is enabled on data is saved to the PC card in the output interval set in Section 7 2 7 When the saving is enabled on the C mark is displayed also in the measurement screen 7 18 IM CW120 E 7 2 Setting Each ltem 7 2 11 Selecting Communication Device DEV Description For RS 232 communication you can select the device to connect to Select PL to connect to a personal computer Select Fr o to connect to a printer By default connection to a personal computer is selected For RS 485 communication only connection to a personal computer is allowed so this setting cannot be made Procedure 1 Using the A Y Cl D keys in the setting item selection screen make the DEV mark and the current device selection appear on the screen Then press the key The selection flashes Selecting a Personal Computer Selecting a Printer SET DEI MEAS SET key UP DOWN LEFT RIGHT keys ENTER key ESC key r 2 Using th
23. such a file number returns to the screen for file number setting To cancel loading press the key The screen in step 1 returns 7 6 IM CW120 E 7 2 Setting Each ltem Saving File Number Setting Screen for Saving MEAS SET key UP DOWN LEFT RIGHT keys eet ENTER key ESC key 4 Specify the file number in accordance with the steps below 5 The smallest file number within the unused numbers from 000 to 029 is displayed 6 If the displayed number is fine press the key 7 If you want to specify a different file number using the Cl D keys select the digit to be changed The selected digit flashes 8 Using the Z X7 keys change the number of the selected digit 9 After making necessary changes press the key The settings are then saved and the setting item selection screen returns You cannot select a file number that has already been used Selecting such a file number returns to the screen for file number setting To cancel saving press the key The screen in step 1 returns A NOTE When the number of setting files residing in the inserted PC card has reached 30 you can no longer save the settings Attempting to save settings causes Err 3 to appear this will disappear and the previous screen will return when any key is pressed Delete an unneces sary file or files and try saving again Theloading cannot be performed when the electric energy cou
24. 1 10 2 Inserting and Removing PC Card 10 2 10 3 Storage Capacity ete eda aee Rhe 10 3 10 4 Formatting PG Gard tata e de tes 10 4 10 5 Saving and Loading from to PC Can 10 5 10 6 Interface with Personal Computer 10 7 Chapter 11 Communication Functions eene 11 1 Jot SAG EE 11 1 12 9 485 Chuan ted uii i ete imd dubites 11 6 TES Data Formal eerie ted tt apt ere oe n 11 9 Chapter 12 Auxiliary Functions eeeeeeeseeeeeeeeeneeeennn nennen nnn nnns 12 1 12 1 Convenient FUrnctiOris ccce cete eei tha ade ve er 12 1 12 2 Using Optional Printer iuuenum tto s 12 3 Chapter 13 Troubleshooting eeeeeeeeseeeeeeeeeeeeene ennt nnns 13 1 13 1 Corrective Measures in Case of Failure 0 0 00 cece eee eee terest 13 1 19 2 Etfor Godes e sie Dese gen i EG ed ete 13 2 Chapter 14 Specifications cccccscccsseeeeeeseeeeseeeeeeeeeeesnneeeneeesesnaeeeneeeeesseaeeneeeees 14 1 14 4 Specifications of CW120 121 sess 14 1 14 2 Specifications of Clamp on Current Probes sssssssesssrereererrsrrererrernereeree 14 8 Appendix 1 Circuit Block Diagram eese nnns App1 1 Appendix 2 Communication Commands eene App2 1 EELER Ma ten ks lees App2 2 1 1 Messages eer pp cte Loo eed App2 2 1 2 Gommarnds eite d ete a te e RE Res App2 4 1 3 Response i n REIR BR es App
25. 4 Backlight sse 2 5 12 1 7 9 11 8 12 2 App2 8 Backup memory 1 3 2 8 2 9 7 1 Dimensions 2 1 14 5 14 8 14 9 7 8 7 10 9 12 9 15 9 16 14 10 14 11 14 12 9 17 10 6 12 2 13 1 Display digits 6 1 6 3 6 4 14 3 14 4 App2 7 App2 10 App2 16 C Clamp on current probe to be used Selecting 6 8 7 26 Electric energy Clearance of all settings and data 12 2 Clearing 1 3 2 5 7 9 9 9 ek 7 11 12 1 14 5 Appt 1 Electric energy measurement 1 8 1 4 Communication device 1 3 2 8 7 1 4 6 7 12 7 18 7 18 7 32 7 8 7 7 7 19 8 5 12 5 8 1 8 4 8 6 9 1 9 12 9 14 Communication settings 1 3 2 8 7 1 10 5 10 6 14 3 14 5 7 20 App2 2 App2 3 Connector 2 1 2 2 11 1 11 2 11 6 App2 13 App2 17 14 6 Energy measurement 9 13 QT utut 1 3 2 6 2 8 3 5 5 1 5 4 Energy measurement mode sssnnn 7 3 6 2 6 3 6 4 6 6 6 7 6 9 External control 1 8 2 2 5 1 7 14 6 10 7 1 7 23 7 24 7 25 7 16 9 3 9 7 9 18 9 19 7 28 13 2 14 4 App2 8 9 20 14 5 14 6 Current range 1 1 2 5 2 8 4 6 6 1 6 2 6 6 6 7 6 10 7 23 7 25 App2 7 File name 7 32 8 5 9 13 9 15 9 16 Current ranges eccceceeeeeeeereeeeeeees 6 8 10 5 10 6 App2 7 Current transformer 2 6 5 1 5 4 7 24 App2 9 App2 10 App2 18 Formatting u
26. 7 2 14 Setting VT Ratio and Setting CT Ratio 5 4 IM CW120 E 5 4 Indication and Change of Wiring Method The abbreviations for wiring methods are labeled immediately above the screen as 12W 13W 33W and 324W 3 4W is not included for the CW120 and the sign on the screen indicates the wiring method currently selected in the CW120 121 192W 1 3W Zeil Zeil Wiring methods WIRING key To change the wiring method press the key Each time you press the WIRING key the m moves to change the selected wiring method IM CW120 E 5 5 5 5 Wiring Check Function N WARNING It is important to check the wiring for correct and safe measurement Check the wiring with reference to Chapter 3 Precautions for Safe Measurement Section 5 1 Precautions for Wiring the Circuit under Test and Section 5 3 Wiring the Circuit under Test with External VT CT Check the connections of voltage probes and for clamp on current probes check the models ratings H L polarities of the plugs and jacks and the arrow symbols on the clamps corre sponding to the source to load directions of the circuit Do not use a clamp on current probe with any non insulated conductor Check Items The following items are checked and judged and then the result of each check item will be displayed as shown on the next page For each voltage input For each current inpu
27. 90 00 kW 180 0 kW 180 0 kW 450 0 kW 450 0 kW 900 0 kW 900 0 kW 3O4W 6 750 kW 13 50 kW 27 00 kW 67 50 KW 135 0 kW 270 0 kW 675 0 kW 1 350 MW Only for CW121 TIP For reactive power the same table applies but the units of measurement are different Units of reactive power Var kVar MVar If either or both of the VT and CT ratios are set to a value other than 1 and if the product of the following formula exceeds 9999 the decimal point is incremented by one Rated power in table x VT ratio x CT ratio x 1 3 IM CW120 E 6 1 Ranges and Display Digits Display Digits The tables below show the display digits decimal point positions and units of measurement Voltage Maximum Display Digits 4 Range x VT Ratio x 1 3 Decimal Point Position and Unit 150 to 999 9 V 999 9 V 1 to 9 999 kV 9 999 kV 10 to 99 99 kV 99 99 kV 100 to 999 9 kV 999 9 kV 1to 4 5 MV 4 500 MV Current Maximum Display Digits 4 Range x CT Ratio x 1 3 Decimal Point Position and Unit 5 to 9 999 A 9 999 A 10 to 99 99 A 99 99 A 100 to 999 9 A 999 9 A 1 to 9 999 kA 9 999 kA 10 to 99 99 kA 99 99 kA 100 to 999 9 kA 999 9 kA 1 to 9 999 MA 9 999 MA 10 MA 10 00 MA Frequency Maximum Display Digits 4 Input Frequency Decimal Point Position and Unit 40 to 70 Hz 70 00 Hz Power
28. C sales offices listed on the back cover of this manual or the sales representative from which you purchased the instrument The contents of this manual may not be transcribed or reproduced in part or in whole without prior permission Trademark Acknowledgments All company and product names appearing in this document are trademarks or registered trademarks of their respective holders Revision Information Disk No CW120 E 1st Edition Dec 2001 YG December 2001 First edition All Rights Reserved Copyright 2001 Yokogawa M amp C Corporation IM CW120 E Checking Items in the Package After opening the package check the product as follows before use If the delivered product is the wrong model any item is missing or the appearance is defective contact the vendor from which you purchased the product CW120 121 Main Unit Check the model and suffix specifications codes in the MODEL and SUFFIX fields of the nameplate at the back of the instrument to ensure that the instrument is exactly as specified in your purchase order Model and Suffix Codes Model Suffix Code Specification Clamp on power meter for single phase two wire single phase three wire CW120 Re and three phase three wire circuits CW121 Clamp on power meter for single phase two wire single phase three wire three phase three wire and three phase four wire circuits D UL CSA standard Bowie F VDE standard R SAA stand
29. Measurement Mode The mode identification code is output following MeasureMode Identification Code File Type 1 Electric energy measurement IM CW120 E App 3 3 E peiund Suel ejeg pue saJnjonus l Appendix 3 File Structures and Data Items Printed 2 1 4 Data Field Titles and Data Formats Depending on Wiring Method No Title Data Format Output Availability BW 193W XN 323W 1 OUTPUT DATE yyyy mm dd Output date 2 OUTPUT TIME hh mm ss Output time 3 INTEG START DATE yyyy mm dd Integration start date 4 INTEG START TIME hh mm ss Integration start time 5 ELAPSED TIME hhhhh mm ss Elapsed time of integration 6 V1 0 000E 00 Voltage 1 V 7 V2 0 000E 00 Voltage 2 V wi 8 V3 0 000E 00 Voltage 3 V SY 9 0 000E 00 Current 1 A d 10 I2 0 000E 00 Current 2 A 11 13 0 000E 00 Current 3 A 12 P 0 000E 00 Active power W 13 Q 0 000E 00 Reactive power Var SY 14 PF 0 000 00 Power factor 15 F 0 000E 00 Frequency Hz 16 Wh 0 00000E 00 Electric energy Wh 17 Wh 9 0 00000E 00 Regenerative energy Wh 4 Note An invalid or overflowed value is output as or OR 2 1 5 Records of Power Failure Restoration Information After a power failure during automatic saving was in progress the times when the power failure and resto
30. NHf Multiplier Unit 5MV lt NRf gt lt Unit gt 5E 3V lt NRf gt lt Multiplier gt 5M lt NRf gt 5E 3 lt Multiplier gt The following multipliers are available Symbol Word Description EX Exa 1018 PE Peta 1015 T Tera 101 G Giga 10 MA Mega 108 K Kilo 10 M Mili 103 U Micro 10 N Nano 10 P Pico 10 12 F Femto 1075 Unit The following units are available Symbol Word Description V Volt Voltage A Ampere Current HZ Hertz Frequency KHZ Kilohertz Frequency Multiplier and Unit are not case sensitive e U is used to indicate u MA is used for Mega M to distinguish it from Mili If used for current however MA is interpreted as Milliampere To refer to Megaampere write as MAA e If both lt Multiplier gt and Unit are omitted the default unit V A or Hz will be used App 2 6 IM CW120 E Appendix 2 Communication Commands Response messages are always expressed in the lt NR3 gt form The default unit is used without the lt Multiplier gt or the lt Unit gt lt Character Data gt lt Character data gt is a data of specific characters mnemonic It is mainly used to indicate options and is chosen from character strings given in For interpretation rules see Rules of Header Interpretation Form Example V1 V2 V3 vi As with the header the COMMunicate VERBose command can be used to select a full response or an ab
31. RANGe v oY oY v RANGe Cond DATE WA v v WA DATE DISPlay wi WA WA v KLOCk WA WA WA v KLOCk v v RESEt v SCALing v WA WA oY SCALing CT SY SY SY wi CT Cond VT v oY WA v VT Cond TIME WA v v v TIME VOLTage v oY v oY VOLTage RANGe v oY oY v RANGe Cond WIRIng Da wi wi WIRIng Cond Effective Blank Ineffective Cond Conditional setting is not allowed during integration IM CW120 E App 2 25 E spuewwog uoneoiunululo2 Appendix 2 Communication Commands 3 INTEgrate Group Status Command Integration in Progress Integration Stopped Wiring Check Setting INTEgrate v v CLEAr DISPlay DISPlay MODE MODE STAR IK S EB m E IK S STARt EXECute METHod METHod TIME TIME STATe NNI S ISIS IM I X I STOP STOP EXECute TIME TIME STORe STORe STATe STATe FiLEname FILEname INTErval INTErval WH WH DIGI DIGI UNIT lt P IME ISP SS MEISE SS IRIS QR gms vi M a a lt p IME IS SN dank UNIT NSIK KS amp IRIS wi Effective Blank Ineffective App 2 26 IM CW120 E Appendix 2 Communication Commands 4 MEASure Gr
32. SEE ALSO For details of the clamp selection see Chapter 7 Making Settings TIP If a change to the clamp on current probe selection is incompatible with the conditions derived from other settings the change is ineffective First change other settings such as the voltage range VT ratio CT ratio and wiring method then change the probe selection The current probe cannot be changed during continuous measurement The current probe cannot be changed when the electric energy count is not zero and an attempt to change causes r Z to appear on the screen this will disappear and the measurement screen will return when any key is pressed Clear the electric energy count first For details of how to do this see Section 9 2 3 Clearing Electric Energy Count or Section 7 2 4 Clearing Electric Energy Count and Resetting System in Chapter 7 Making Settings IM CW120 E 6 9 pou BuuiM pue sabuey Dunes B 6 4 Changing Wiring Method Setting Procedure to Change Wiring Method Setting 1 The sign is displayed uppermost on the screen above the wiring method currently selected To change the method press the key when the measurement screen is displayed 102W 13W 303W 394W lt 4 Wiring methods WIRING key Each press of the key changes the wiring method selection sequentially as follows For CW120 122W 103W 303W Default 303W
33. Single phase three wires 13W SOURCE gt LOAD N Vi V2 CH1 CH2 Three phase three wires 383W SOURCE gt LOAD N Vi V2 CH1 CH2 Three phase four wires 34W Only for CW121 N SOURCE LOAD N V1 V2 V3 CH1 CH2 CH3 5 2 IM CW120 E Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 5 2 Diagrams of Basic Wiring The table below shows the correspondences between the voltage current units sets of a unit input number displayed on the screen and the input terminals for voltage and clamp on current probes Wiring Method Phase Lines Voltage Inputs Current Inputs Single phase two wires Terminals N V1 Terminals CH1 1 2W Units V1 Units A1 Single phase three wires Terminals N V1 N V2 Terminals CH1 CH2 123W Units V1 V2 Units A1 A2 Three phase three wires Terminals N V1 N V2 Terminals CH1 CH2 83 3W Units V1 V2 Units A1 A2 Three phase four wires Terminals N V1 N V2 N V3 Terminals CH1 CH2 CH3 z 394W Units V1 V2 V3 Units A1 A2 A3 e Only for CW121 5 3 IM CW120 E 5 3 Wiring the Circuit under Test with External VT CT N WARNING When using an external current transformer CT be careful not to allow the secondary stage of the CT to become open circuited while the primary stage is being electrified Otherwise a high voltage may develop on the secondary stage
34. Under the conditions of the temperature at 23 C wave input 96031 Max 500 A Range 0 to 500 Arms AC 750 Apk 0 to 0 5 Vrms AC 1 mV A 1 5 of rdg 0 4 mV 20 Hz to 45 Hz 0 5 of rdg 0 1 mV 45 Hz to 66 Hz 0 8 of rdg 0 2 mV 66 Hz to 1 kHz x1 45 Hz to 1 kHz 5 C humidity at 35 to 75 RH with sine Temperature coefficient 0 05 of full scale C in ranges of 5 C to 40 C Maximum allowed current 250 Arms AC 45 Hz to 1 kHz 625 Arms AC 45 to 400 Hz Output impedance Approximately 6 Q Approximately 2 4 Q External magnetic field effects 0 1 A equivalent or less at 400 A m 50 60 Hz 0 2 A equivalent or less at 400 A m 50 60 Hz Conductor position effects 0 5 at 20 to 200 A 45 Hz to 1 kHz 0 5 at 50 to 500 A 45 Hz to 1 kHz Circuit voltage 600 Vrms AC maximum Withstanding voltage 3 7 kVrms AC for 1 minute core to casing and core to output Measurable conductor diameter 30 mm diameter maximum Operating temperature and humidity ranges 5 to 40 C 35 to 80 RH no condensation Storage temperature and humidity ranges 20 to 60 C 90 RH or less no condensation Applicable locations Indoors altitude of 2000 m or lower Dimensions W x H x D Approximately 73 x 130 x 30 mm Weight Approximately 300 g Output terminals Banana plugs safety terminals Output cable length Approximat
35. V1 H P Q PF F Wh Wh 2001 11 11 10 10 00 0000 00 00 0 00 00 0 00 00 2001 11 11 10 15 00 0000 00 00 0 00 00 0 00 00 2001 11 11 10 21 00 0000 00 00 0 00 00 0 00 00 IM CW120 E 8 5 jueuieJnseo y enj eA snoeuejuejsu e 8 3 Saving Data Header measurement conditions CW12x Indicates the model File Type 2 indicates a file containing instantaneous values measured Measure Mode 1 indicates electric energy measurement Fields of each data record OUTPUT DATE Date of output OUTPUT TIME Time of output INTEG START DATE Integration start date INTEG START TIME Integration start time ELAPSED TIME Elapsed time of integration The order of measured value fields below shows an example for the single phase two wire method V1 Rms voltage value appearing with V1 on meter screen n Rms current value appearing with A1 on meter screen P Active power value appearing with W on meter screen Q Reactive power value appearing with Var on meter screen PF Power factor value appearing with PF on meter screen F Frequency value appearing with Hz on meter screen Wh Active electric energy value appearing with Wh on meter screen Wh Regenerative energy not appearing on meter screen SEE ALSO For details see Appendix 3 File Structures and Data Items Printed 8 6 IM CW120 E 8 4 Frequency Measurement The frequency of voltage input
36. V1 is presented as the measured frequency The frequency measurement is performed synchronously with the signal input When the V1 level is less than 10 of the rated voltage the integration cycle is fixed to approximately 125 milliseconds Range of frequency measured 45 to 65 Hz Provision of Lowpass Filter A lowpass filter with the cutoff frequency of 300 Hz is built into the frequency measurement circuit for eliminating noise from the input signal and assuring accurate frequency measurement IM CW120 E 8 7 jueuieJnseo y onjeA snoeuejuejsu n 8 5 Sampling Cycle and Integration Cycle Synchronously with the zero crossing signal for the input voltage V1 the time period from when a cycle of zero crossing begins until a cycle of zero crossing occurs immediately next after a specified period 100 milliseconds has elapsed is set to the integration cycle and the rms voltage rms current and power are calculated Sampling frequency M 10 kHz Ga Gem Integration cycle 120 ms Frequency ia measurement input V1 50 Hz sine wave 20 ms Zero crossing signal 100 ms d Le Examples Frequency Hz Integration Cycle ms Number of Waves 50 6 60 7 8 8 IM CW120 E Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com Chapter 9 Electric Energy Measurement 9 1 Measuring Electric Energy The CW120 121 power
37. a cursor movement UP DOWN LEFT or RIGHT key is pressed as follows display contents differ depending on the wiring method p Displayed Item Phase Wires ak Screen Screen Screen Screen Screen Screen osition 1 2 3 4 5 6 Upper row V1 Ww PF Wh Single phase two wires 12W d owerrow SCT War uz Tou Single phase three wires 1 3W Upper row V1 Ai W PF Wh Three phase three wires 3 3W Lower row V2 A2 Var Hz TIME Upper row V1 V3 A2 Ww PF Wh Three phase fourwires BEANN oi owerrow ve At AS ar Hz ME 1 4 IM CW120 E Chapter 2 Components and Indications 2 1 Front Panel and Connector Block Dimensions EET Block Unit mm Fzi4999 oo H e Ge 6 Si Front View Side View O input O CVWV 121 cLAMP ONPOWERMETER YOKOGAWA 4 5 5V MAX RS 232 START STOP IN OUT BVA MAX 50 60 100 240V 5A 10A 20A 50A 100A 200A 500A 1000A AC INPUT A Ne ees KEY LOCK A PC CARD IM CW120 E 2 1 suoneoipu pue sjuguodwog D 2 1 Front Panel and Connector Block Connector Block Voltage input terminals Current input terminals N WT 495V MAX TERMINALS MAX TO EARTH EN Qui V MAX CW120 Supports from single phase two wire to three phase three wire circuits Voltage inpu
38. all the measured values will take place This action is referred to as manual saving File name MWTHxxx CSV 000 to 029 Saving Data During Electric Energy Measurement Set the output interval via the setting screen and data will be saved at the output interval thus set This action is referred to as auto saving File name AWTHxxx CSV 000 to 029 A NOTE Ensure that data saving to PC card is enabled see Section 7 2 10 if you want to save data during electric energy measurement SEE ALSO For details of the respective settings see Chapter 7 Making Settings For details of data saving during instantaneous value measurement see Section 8 3 Saving Data For details of data saving during electric energy measurement see Section 9 4 Saving Data IM CW120 E 10 5 DIS Od 10 5 Saving and Loading from to PC Card Saving and Loading Settings Saving Settings Select AMMA in the setting item selection screen select SAE specify the file number and then perform saving File name WTHxxx SET File number from 000 to 029 Loading Settings Select si TIT in the setting item selection screen select ofc specify the file number of one of the setting files saved in the PC card and then perform loading File name WTHxxx SET t_ File number from 000 to 029 SEE ALSO For details of the respective settings see Section 7 2 2 Loading and Saving Settings in Chapter 7 Making Settings
39. an external voltage transformer VT and inputting the secondary circuit output of the VT to the CW120 121 setting the VT ratio appropriately will display the reading correctly in the scale of the primary circuit namely will perform scaling The VT ratio can be set from 1 to 10000 and is set to 1 by default When not using a VT set the VT ratio to 1 Whenever the VT ratio is set to a value other than 1 the mark is displayed even in the measurement mode Procedure 1 Using the Y D keys in the setting item selection screen make the mark and the existing VT ratio setting appear on the screen Then press the key The digit of the one place flashes VT Ratio 1 VT Ratio 10000 ILLI SET MEAS SET key UP DOWN LEFT RIGHT keys CO ENTER key ESC key 2 Using the D keys select the digit to be changed The selected digit flashes 3 Using the 5 YV keys change the number 4 After making necessary changes press the key The VT ratio setting is changed accordingly and the setting item selection screen returns To cancel the changes press the key The setting item selection screen also returns 7 22 IM CW120 E 7 2 Setting Each Item A NOTE The VT ratio cannot be changed when the electric energy count or the elapsed time of integra tion is not zero Attempting to change the ratio causes 7 7 to appear on the screen this will disappear
40. and CT ratio can be set Setting ranges VT ratio 1 to 10000 CT ratio 1 to 10000 in 0 01 increments 14 4 IM CW120 E 14 1 Specifications of CW120 121 11 External Control Input Output provided only with model having RS 232 interface Can be used for remote start and end of integration for electric energy measurement External control input TTL level or voltage free contact External control output TTL level or contact 12 Other Functions Clock accuracy 100 ppm typical key lock system resetting 13 General Specifications Applicable locations Indoors altitude of 2000 m or lower Operating temperature and humidity ranges 0 C to 50 C 5 to 85 RH no condensation Storage temperature and humidity ranges 20 C to 60 C 90 RH or less no condensation Insulation resistance 50 MQ or more at 500 V DC between voltage input terminals short circuited and casing between voltage input terminals short circuited and current communication external control input output terminals short circuited between power line and casing and between power line and current communication external control input output terminals short circuited Withstanding voltage 5550 V AC for 1 minute between voltage input terminals short circuited and casing 3250 V AC for 1 minute between voltage input terminals short circuited and current communication external control input output terminals short circuited and 2300 V A
41. and the measurement screen will return when any key is pressed Clear the electric energy count first For details of how to do this see Section 9 2 3 Clearing Electric Energy Count or Section 7 2 4 Clearing Electric Energy Count and Resetting System in this chapter Asetting that causes the product of VT ratio x CT ratio x rated power x 1 3 to exceed 9999 GW is not allowed TIP Example of VT ratio setting When using a 2200 to 110 V transformer the transformer ratio is 20 1 So set the VT ratio to 20 Displayed values Range of voltage reading Voltage range x VT ratio Range of current reading Current range x CT ratio Range of power reading Rated power x VT ratio x CT ratio IM CW120 E 7 23 sbumes uye x 7 2 Setting Each Item 7 2 14 Setting CT Ratio CT Description When installing an external current transformer CT and inputting the secondary circuit output of the CT to the CW120 121 setting the CT ratio appropriately will display the reading correctly in the scale of the primary circuit namely will perform scaling The CT ratio can be set from 1 00 to 10000 0 and is set to 1 00 by default When not using a CT set the CT ratio to 1 00 Whenever the CT ratio is set to a value other than 1 00 the mark is displayed even in the measurement mode Procedure 1 Using the Y X D keys in the setting item selection screen make the mark and the existing CT ratio settin
42. causing extreme danger A measuring current flows through the bold lines shown in the figure below For these lines use wires having an adequate margin of current carrying capacity If the maximum voltage or current level being measured exceeds the maximum measurement range of the CW120 121 use an external voltage transformer VT or current transformer CT This strategy enables the voltage or current levels beyond the maximum range to be measured When to use a VT and how If the maximum voltage of the circuit exceeds 450 V connect an external VT and connect the secondary stage of the VT to the voltage input terminals When to use a CT and how If the maximum current of the circuit exceeds the following value connect an external CT and clamp the secondary stage wire of the CT with a current probe 96033 probe 50 A rated at 5 10 20 50 A 96030 probe 200 A rated at 20 50 100 200 A 96031 probe 500 A rated at 50 100 200 500 A 96032 probe 1000 A rated at 200 500 1000 A Example for single phase two wires 1 2W 1 source MT CT eng V S LN 1 QQQ QQQ VT 1 000 Mano i L2c cco Voltage input Current input Scaling When using a VT and or CT you can set the VT ratio and or CT ratio to display the readings of the primary circuit voltages and currents This is called the scaling function SEE ALSO For details of how to set the CT and VT ratios see Sections 7 2 13 and
43. changes the integration start date and time to the current time TIP For the year set the last two digits The range of the year setting is 00 to 99 years 2000 to 2099 SEE ALSO For details of the start and stop of integration see Section 9 2 Starting and Stopping Integration IM CW120 E 7 15 sbumes Durem x 7 2 Setting Each Item 7 2 9 Setting Integration Stop Date and Time STOP Description There are three ways to stop integration Automatic stopping at the specified time on the specified date Manual stopping by pressing the key for one second or more Remote stopping by inputting a signal at the external control terminals The following describes the stop date and time setting for the first way Procedure 1 Using the Y X D keys in the setting item selection screen make the STOP mark and the current settings of the stop date and time appear on the screen Then press the key The day setting flashes Integration Stop Date and Time Change Screen Year month and day Hour minute second MEAS SET key UP DOWN LEFT RIGHT keys ENTER key ESC key 2 Using the X D keys select an item year month day hour minute or second you want to change where the year month and day are shown with superscripts y m and d to avoid confusion The selected item flashes 3 Using the X7 keys change the value of the selected item When changing a
44. currents If an input level is 1 or less of the range then an error results Else the clamp direction check takes place Error message Pil ME LI LI T A 2 Clamp directions e For any wiring method other than 3 3W if the power of one or more phases is negative an error results e For 303W if the whole power is negative an error results Else Good is displayed Lr A F Luc A Error message i A NOTE Asthe wiring is judged on the above criteria an error may result even when wiring is correct or wrong wiring may p ass the check When a measured value appears to be abnormal check the above criteria and wiring again IM CW120 E 5 5 Wiring Check Function Carrying out Wiring Check 1 When the measurement screen is displayed press the key for at least three seconds and LHE appears on the screen and flashes Press WIRING key for at least three seconds e 5 W V 2 Press the key Then LHEL stops flashing and the wiring check begins START amp STOP key 3 When no error has been found Lond is displayed on both the upper and lower rows Press the key to return to the measurement screen When no error Upper Judgment of current inputs Lower Judgment of voltage inputs WIRING key Os NU pod O C J i MD v START amp STOP key
45. data deletion or formatting press the key The setting item selection screen also returns 7 8 IM CW120 E 7 2 Setting Each Item 7 2 4 Clearing Electric Energy Count and Resetting System TXT38 Description Select ink E to clear the electric energy count watt hours Select 545 to reset the system Clearing the electric energy count means to reset all of the electric energy count elapsed time of integration and regenerative energy count to zeros Resetting the system means to perform the same actions as clearing the electric energy count and initialize the settings to the defaults except for the date time and device number Procedure 1 Using the A Y Cl D keys in the setting item selection screen make the mark to appear on the screen Then press the key int EL begins flashing Electric Energy Count Clearance Screen System Resetting Screen NN Lo sy IEL L1 IL Z by SET MEAS SET key UP DOWN LEFT RIGHT keys ENTER key ESC key 2 Using the O Y J D keys select int EL if you want to clear the electric energy count or 54 if you want to reset the system 3 Press the key The selected action takes place and the setting item selection screen returns To cancel clearing the electric energy count or resetting the system press the key The setting item selection screen also returns A NOTE The electric energy count can also be cleared by simp
46. header and data If the response can be used directly as a program message the response message will include the command header Response consisting of data only If the response cannot be used directly as a program message i e the response is a query only command the response message will include only the data However some query only commands will include a header When you want a response without a header You can have the header removed from a response that has a header and data by using the COMMunicate HEADer command Abbreviated form Usually the lower case letter portion of a response header is abbreviated when it is returned You can have it not abbreviate the lower case letters by using the COMMunicate VERBose command IM CW120 E App 2 5 spuewwoy uoneoiunuluo2 Appendix 2 Communication Commands 1 4 Data The data section comes after the header A space must be included between the header and the data The data contains conditions and values It is classified as follows Data Data Description lt Decimal gt Value expressed as a decimal number lt Voltage gt lt Current gt Value with a physical dimension lt Frequency gt lt Character data gt Specified character string mnemonic Select from lt Boolean gt Indicates ON OFF Specify with ON OFF or a value lt Character string data gt Arbitrary character string lt Filena
47. input When using Voltage Input Probes and Current sensing Clamps supplied with the CW120 External control input and output Shield cable less than 3m EMC immunity Compliant with EN61326 Performance criterion under immunity test environments B self returnable performance deterioration 14 6 IM CW120 E 14 CW120 21 Exterior OOO L L H H D OOO EN Qus wl a2 3 CS input AN CVV 1 amp 1 CLAMP ONPOWERMETER YOKOGAWA A 150V 300V 450V 1g2W 1g3W 3e3W Zeit 5A 10A 20A 50A 100A 200A 500A 1000A KEY LOCK ener 117 4 6 Unit mm approx inches 161 6 3 5 5V MAX s a o E o E lt D E x 29 x a Ei 100 240V 8VA MAX 50 60 AC INPUT A 51 2 0 Note This figure shows the CW121 but there is no difference in exterior from the CW120 POWER IM CW120 E 14 7 H suoneoayi2ods 14 2 Specifications of Clamp on Current Probes 1 96030 and 96031 Clamp on Current Probes Item Measurement range Output voltage Amplitude Accuracy Phase 96030 Max 200 A Range 0 to 200 Arms AC 300 Apk 0 to 0 5 Vrms AC 2 5 mV A 1 5 of rdg 0 4 mV 20 Hz to 45 Hz 0 5 of rdg 0 1 mV 45 Hz to 66 Hz 0 8 of rdg 0 2 mV 66 Hz to 1 kHz 2 0 of rdg 0 4 mV 1 kHz to 20 kHz 0 5 45 Hz to 1 kHz
48. meters have two modes for measurement 1 Instantaneous value measurement Measures the rms voltages and rms current of individual phases and power reactive power power factor and frequency 2 Electric energy measurement In addition to the values in the instantaneous value measurement mode measures the electric energy Measurement is performed continuously and integration is started and stopped by using the keys This section describes electric energy measurement Displayed Data As the values measured and displayed those related to active electric energy are added to the values during instantaneous value measurement During Instantaneous Value Measurement Item Unit Displayed Name Rms voltage V ME vee a differs depending on the wiring method Rms current A AT RADAS T differs depending on the wiring method Active power Ww W Reactive power Var Var Power factor PF Frequency Hz Hz input frequency of V1 During Electric Energy Measurement Item Unit Displayed Name Active electric energy Wh Wh Elapsed time of Hour minute second 00 00 00TIME integration Hour minute 0000 00TIME Hour 00000hTIME The display format changes over between the above automatically depending on the elapsed time Regenerative electric Wh The values are not displayed on the screen energy but only saved Stands for the integrated reversal power flow IM CW120 E 9 1 juswai
49. n the electric energy measurement mode the settings can be viewed only for checking and cannot be modified IM CW120 E 7 3 sbumes Huye x 7 2 Setting Each Item 7 2 1 Setting Device Number N0 Description The device number is used for identifying each power meter CW120 121 when monitoring a specific power with two or more CW120s and CW121s and also used as the device address when using RS 485 communication The device number consists of three digits It is set to 001 by default and can be set to any number from 001 to 999 Procedure 1 Using the O6 Y Cl D keys in the setting item selection screen make the N0 mark and its corresponding setting appear on the screen Then press the key The rightmost digit begins flashing Device Number Setting Screen MEAS SET key UP DOWN LEFT RIGHT keys a Q S d ENTER key ESC key 2 Using the J D keys select the digit to be changed The selected digit flashes 3 Using the S amp 7 keys change the number of the selected digit 4 After making necessary changes press the key The new device number is then set and the setting item selection screen returns To cancel the changes press the key The setting item selection screen also returns 7 4 IM CW120 E 7 2 Setting Each ltem 7 2 2 Loading and Saving Settings Cm Description Select old to load settings from a PC card Select D I E to save settings to a PC c
50. probe Device Oori Connected device 0 Printer 1 PC BaudRate 0to4 Baud rate 0 1200 bps 1 2400 bps 2 4800 bps 3 9600 bps 4 19200 bps DataLength 70r8 Data bits 7 or 8 bits Parity 0to2 Parity 0 None 1 Even 2 Odd StopBit 10r2 Stop bits 1 or 2 bits Handshaking 0 t0 3 Flow control 0 ON OFF 1 XON XOFF 2 XON RS 3 CS RS App 3 8 IM CW120 E Appendix 3 File Structures and Data Items Printed 3 3 Print Format The print format is as shown below yyyy mm dd hh mm ss Wiring SetVRange DX MeasVRange Vt X Ct X ClampType D No x Device X BaudRate DX DataLength x Parity x StopBit x Handshaking x x Setting IM CW120 E App 3 9 E peiund Suel ejyeg pue saJnjonus l Appendix 3 File Structures and Data Items Printed 4 Automatic File Naming When the file name is not specified though users can specify the name only for automatic saving the power meter automatically names the file as follows Automatic saving AWTHxxx CSV Manual saving of instantaneous values MWTHxxx CSV Setting file WTHxxx SET where xxx is the smallest unused number from 000 to 029 App 3 10 IM CW120 E Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com Index A Decimal point position 6 3 6 4 7 1 AC soweit aun 4 1 14 6 DOREM EE Device address 7 4 11 8 App2 8 B Device number 2 8 7 1 7 2 7 3 7
51. rate Start bits Data bits Parity Stop bits Connector Hardware handshake Software handshake Reception buffer length Compliant with EIA RS 232 Point to point Full duplex Asynchronous 1200 2400 4800 9600 19200 bps Fixed to 1 bit 7 or 8 bits Odd even or none 1 or 2 bits Miniature DIN 8 pins Whether to set CA RTS and CB CTS to true or use them as control signals can be chosen Transmission reception control by X on and X off signals is possible 1024 bytes The handshaking settings cannot be changed from the CW120 121 Modify the handshaking settings in a setting file and load the file to the CW120 121 RS 232 Interface Connections When connecting a CW120 or CW121 to a computer or printer via its RS 232 interface you need to make interface settings such as handshaking methods data transmission speed baud rate and data bit length to match those settings in the computer For details of these settings see the pages that follow As the interface cable use one of the cables dedicated for the CW120 121 the 91011 with D sub 9 pin connector for a PC 91009 with D sub 25 pin connector for a PC or 91010 for a printer IM CW120 E 11 1 suonuny uonesiunwwo9 m 11 1 RS 232 Connector Pins and Assigned Signals 1 CTS Clear To Send Input handshaking signal from the computer used when transmitting data to the computer 2 RXD Receive rx Data In
52. saving the setting file Er Fr iH Failure in loading the setting file Co tio Er r iuc PC card related error other than above Co oi T Errat Data in internal memory exceeds the capacity IL i m e CECI Failure in saving measured data within output interval E unn The electric energy value or elapsed time of integration is not zero No LIT gu change to setting allowed GE tt rr The product of rated power x VT ratio x CT ratio x 1 3 exceeds 9999 GW To return to the measurement screen from the error display press any key 13 2 IM CW120 E Chapter 14 Specifications 14 1 Specifications of CW120 121 1 Inputs Item Voltage Inputs Current Inputs Input type Resistive potential division Clamp sensing Ratings ranges 96033 clamp on probe 5 10 20 50A 96030 clamp on probe 20 50 100 200A 96031 clamp on probe 50 100 200 500A 96032 clamp on probe 200 500 1000 A 150 300 450 V CW120 Single phase two wires single phase three wires three phase three wires Phase lines CW121 Single phase two wires single phase three wires three phase three wires three phase four wires Input CW120 Approximately 1 5 MQ resistance CW121 Approximately 1 3 MO Maximum allowed continuous input A D conversion 96033 clamp on probe 130 Arms 96030 clamp on probe 250 Arms 96031 clamp on probe 625 Arms 96032 clamp on probe 1000 Arms Simultaneous volt
53. the CARD FILEname and CARD TYPE commands CARD DELEte Syntax CARD DIREctory Function Queries all the file names that have been set using the CARD TYPE command Syntax CARD DIREctory CARD FILEname Function Sets queries the names of all files that reside in the PC card CARD FORMat Function Formats the PC card Syntax CARD FORMat CARD PICKout Function Queries all the settings relating to transfer of a specified range of file contents Syntax CARD PICKout CARD PICKout END Function Sets queries the transfer end point Syntax CARD PICKout END CARD PICKout END lt NRf gt lt NRf gt 1 to 2147483647 CARD PICKout SEND Function Transfers the contents for the range specified using the CARD PICKout STARt and CARD PICKout END commands of the file that was specified using the CARD FILEname and CARD TYPE commands CARD PICKout SEND STX ASCII code 02H file contents ETX ASCII code 03H The STX and ETX are not attached in RS 485 communication Syntax CARD PICKout STARt Function Sets queries the transfer start point Syntax CARD PICKout STARt CARD PICKout STARC lt NRf gt lt NRf gt 1 to 2147483647 Syntax CARD FILEname CARD FILEname Filename Measured data items Up to 8 characters App 2 18 IM CW120 E Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176
54. the buffer has become full regardless of whether a handshake for data receptions is set overflowed data will not be stored and will be discarded When developing the computer s communication program be careful about the data transmission rate so that the reception buffer either in the CW120 121 or in the computer will not become full IM CW120 E suoloun y uoneoiunuiuo m 11 2 RS 485 The RS 485 interface allows multiple CW120s and CW121s to be connected for remote monitoring RS 485 Interface Specifications Electromechanical specifications Topology Communication method Synchronization Baud rate Start bits Data bits Parity Stop bits Connector Hardware handshake Software handshake Error detection Reception buffer length Maximum transmission distance Terminating resistor Compliant with EIA RS 485 Multidrop Half duplex Asynchronous 1200 2400 4800 9600 19200 bps Fixed to 1 bit 7 or 8 bits Odd even or none 1 or 2 bits 4 screw terminals M3 Not available Not available 2 byte simple summation checksum 1024 bytes 1 2 km when using shielded cable containing 2 twisted pairs of AWG 24 conductors Approx 120Q built in IM CW120 E 11 2 RS 485 RS 485 Interface Connections See the figure below for the wiring of RS 485 cables in two wire method to connect to a personal computer When using the RS 232 port of the PC you need an RS 232 RS 485 conv
55. the personal computer to the CW120 are called program messages and messages received by the personal computer from the CW120 are called response messages If a received program message contains a query command a command which requests a response the CW120 returns a response message A single response message is always returned in response to a single program message Program Messages As explained above program messages are sent from the personal computer to the CW120 The format of a program message is shown below lt Program message unit gt lt program message unit gt lt program message unit gt lt PMT gt lt Program message unit gt A program message is a train of zero or more program message units each unit corresponds to one command The CW120 executes the commands in the order that they are received Each program unit is separated by a semicolon 3 lt PMT gt PMT is a terminator used to terminate each program message For the CW120 the terminator is a string of CR ASCII code 0DH and LF ASCII code OAH characters Format of Program Message Unit The format of a program message unit is shown below Program header space program data Program header gt The program header contains the command type Program data gt If there are certain conditions for executing a command they are appended as program data The program data follows the program header and is separated from
56. the screen under the voltage range currently selected To change the range press the key when the measurement screen is displayed mu 300 450 Voltage ranges 2 O eL ee ER CODE Each press of the key changes the range selection sequentially as V RANGE key follows 150V 300V gt 450V Default 150 V TIP If a change to the range setting is incompatible with the conditions derived from other settings DE E Err is displayed and the change is ineffective First change other settings such as the current range VT ratio CT ratio and wiring method then change the voltage range The voltage range cannot be changed during continuous measurement The voltage range cannot be changed when the electric energy count is not zero Pressing the key at this time causes E rr 2 to appear on the screen this will disappear and the measurement screen will return when any key is pressed Clear the electric energy count first For details of how to do this see Section 9 2 3 Clearing Electric Energy Count or Section 7 2 4 Clearing Electric Energy Count and Resetting System in Chapter 7 Making Settings 6 6 IM CW120 E 6 3 Changing Current Range Setting Procedure to Change Current Range Setting 1 The sign is displayed lowermost on the screen above the current range currently selected To change the range press the key when the measuremen
57. 0 kW 9 000 kW 22 50 kW 45 00 kW 90 00 kW 225 0 kW 450 0 kW 1 2W_ 1 500 kW 3 000 kW 6 000 kW 15 00 kW 30 00 kW 60 00 kW 150 0 kW 300 0 kW 1p3W 3 000 kW 6 000 kW 12 00 kW 30 00 kW 60 00 kW 120 0 kW 300 0 kW GOU D kW 393W 3 000 KW 6 000 KW 12 00 kW 30 00 kW 60 00 kW 120 0 kW 300 0 kW 600 0 kW 304W 4 500 kW 9 000 KW 18 00 kW 45 00 kW 90 00 kW 180 0 kW 450 0 kW 900 0 kW 192W 2 250 kW 4 500 kW 9 000 kW 22 50 kW 45 00 kW 90 00 kW 225 0 kW 450 0 kW 1p3W 4 500 kW 9 000 kW 18 00 kW 45 00 kW 90 00 kW 180 0 kW 450 0 kW 900 0 kW 393W 4 500 kW 9 000 KW 18 00 KW 45 00 kW 90 00 kW 180 0 kW 450 0 kW 900 0 kW 394W 16 750 kW 13 50 KW 27 00 kW 67 50 kW 135 0 kW 270 0 kW 675 0 kW 1 350 MW 5 000A 10 00A 20 00A 50 00A 100 0A 200 0A 500 0A 1 000kA 150 0 V 300 0 V 450 0 V 7 Communication Functions Electrical specifications Compliant with EIA RS 232 or EIA RS 485 Synchronization Asynchronous Baud rate 1200 2400 4800 9600 19200 bps 8 PC Card Interface Slots One Type II PC card slot Applicable cards Flash ATA memory card Applications Saving measured data saving and loading settings 9 Wiring Error Check Functions Check items Existence of input voltages Frequency range Voltage phase sequence Existence of input currents Current sensing clamp directions 10 Scaling Function The VT ratio
58. 10 Chapter 7 Making Settings eeeseeeseiseeseeeeeeeeee ennt nnne 7 1 7 1 Setting Items and Item Selection seesseeseeeeeeeeeeeeeeeeeeeeeetereneseesennennseneenne 7 1 Te Setting Each Item 33 2e rose edet eed 7 4 7 3 Setting Name of Measured data File 7 32 Chapter 8 Instantaneous Value Measurement eese 8 1 8 1 Measuring Instantaneous Values e 8 1 8 2 Switching Display Contents sseeneeneeneeeeeeeeeeeeeeeeeeeeneneeensrnenneennennennnene 8 2 93 Saving Data EE 8 4 8 4 Frequency Measurement sesesseeeeeeeeeeeenee entren nnnm nnne nns 8 7 8 5 Sampling Cycle and Integration Cycle seeeee 8 8 IM CW120 E 7 Contents Chapter 9 Electric Energy Measurement eere 9 1 9 1 Measuring Electric Energy seen 9 1 9 2 Starting and Stopping Integration sssen 9 3 9 3 Switching Display Contents esseseeeeeieeeeeeneereeeneenetenrtnetnninntnnennnnnneenee 9 10 9 44 Saving Dalai aae hen weee orte n tion esee diete Bre tede tede 9 12 9 5 Backup MEMO nist id dede eene ea ee ui dens 9 15 9 6 X External Control Input Output nns 9 18 9 7 Meter Actions upon Power Failure and Recovery esses 9 21 Chapter 10 PC Card inire aede 10 1 10 1 PC Card Specifications g et aeterne tea heit 10
59. 2 5 1 4 Data se ee re N E App2 6 1 5 Messages on HG A0p EA App2 8 1 6 Communication Commands essen App2 9 Output Queue and Error Oueue sene App2 12 1 7 Detailed Description of Communication Commands App2 12 1 7 4 COMMunicate Group App2 12 Ta S YS Tem Group eebe ee domes App2 13 1 7 8 INTEgrate Group App2 15 1 7 4 MEASure Group App2 17 8 IM CW120 E Contents 17 5 STATUS Group sissies deem ite alee alee App2 17 1 7 6 MEMON GrOoUp eter ete n HERR Re App2 18 1 7 7 CARD Groups aeterne eee deret te eei deus App2 18 1 7 9 Common Group sninen ii erc eed et e erede App2 19 2 Error Messages 2 oue gue he ede eL ds App2 20 3 Command Effectiveness Tables ssessee eseese eeir eee nene renesrnennns App2 24 Appendix 3 File Structures and Data Items Printed App3 1 EE GE App3 2 2 Measured Data eec eec nene fe dE Een App3 3 2 1 File Fortmat note oet eei ob Ae a App3 3 2 2 Print Format eie tee e eie imet le App3 5 E ue EE App3 6 3 1 File Format aaae pe eie ERE App3 6 3 2 Output Format and Data Values sese App3 7 3 3 Print Formati iei ne qtd n aa ied ei App3 9 4 Automatic File Naming nennen App3 10 er ei EE Index 1 IM CW120 E Chapter 1 Product Overview 1 1 Product Overview The CW120 121 clamp on power meters measure the fundamental electric power factors namely instantaneous power relat
60. 33 Max 50 A Range 0 to 50 Arms AC 0 to 0 5 Vrms AC 10 mV A 1 0 of rdg 0 3 mV 20 Hz to 45 Hz 0 5 of rdg 0 1 mV 45 Hz to 66 Hz 0 8 of rdg 0 2 mV 66 Hz to 1 kHz 1 0 of rdg 0 3 mV 1 kHz to 5 kHz 3 0 of rdg 0 4 mV 5 kHz to 20 kHz Phase 1 0 for 1 to 50 A 45 Hz to 1 kHz Under the conditions of the temperature at 23 C 5 C humidity at 35 to 75 RH with sine wave input Temperature coefficient 0 05 of full scale C in ranges of 0 C to 50 C Maximum allowed current 130 Arms AC 45 Hz to 1 kHz Output impedance Approximately 18 Q External magnetic field effects 0 1 A equivalent or less at 400 A m 50 60 Hz Conductor position effects 0 5 at 1 to 50 A 45 Hz to 1 kHz Circuit voltage 300 Vrms AC maximum Withstanding voltage 3 7 kVrms AC for 1 minute core to casing and core to output Measurable conductor diameter 18 mm diameter maximum Operating temperature and humidity ranges 0 to 50 C 5 to 8596 RH no condensation Storage temperature and humidity ranges 20 to 60 C 90 RH or less no condensation Applicable locations Indoors altitude of 2000 m or lower Dimensions W x H x D Approximately 52 x 106 x 25 mm Weight Approximately 220 g Output terminals Banana plugs safety terminals Output cable length Approximately 3 meters Standard accessories
61. 5 Section 5 1 Precautions for Wiring the Circuit under Test and Section 5 3 Wiring the Circuit under Test with External VT CT Donot place any load on the instrument Do not place any other equipment of a vessel filled with water on the instrument Otherwise the instrument may become defective Moving the instrument Before moving the instrument make sure the power cord and all other cables are disconnected Input Terminals Do not bring any electrified substance close to the signal terminals Otherwise the internal circuitry may be destroyed Do not apply any mechanical shock to the signal terminals Otherwise such impact may be transformed into electrical noise and input to the instrument Protection of Case and Operation Panel Do not spray any volatile chemical on the case or operation panel Do not leave any rubber or vinyl product in contact with the instrument for a prolonged period Otherwise the instrument may be discolored or deformed Cleaning When cleaning the case and or operation panel disconnect the power cord from the outlet Then wipe the surfaces of the case and or operation panel with a soft clean cloth Do not use chemicals such as benzine or paint thinner Otherwise the instrument may be discolored or deformed Display Screen When the instrument is shipped from the factory the display screen is covered with a protective film Remove the film before you begin using the i
62. 5 00 POWER ON 2001 12 01 09 18 00 POWER OFF 2001 12 01 and 09 15 00 indicates that a power failure occurred at 09 15 00 on December 1 2001 POWER ON 2001 12 01 and 09 18 00 indicates that the power was restored at 09 18 00 on December 1 2001 9 22 IM CW120 E Chapter 10 PC Card 10 1 PC Card Specifications The CW120 121 can save measured data and settings to a PC card as well as read saved settings from a PC card to apply them The PC card interface of the CW120 121 complies with the following standards e PCMCIA Japan Electronic Industry Development Association JEIDA Slots One Type II slot Card type Flash ATA Format MS DOS PC Card Models Whose Operations Have Been Verified Flash ATA card Supplier Model Capacity SanDisk Corporation Japan SDP3B 16 16 MB e Compact flash card Supplier Model Capacity SanDisk Corporation Japan SDCFB 16 16 MB SDCFB 32 32 MB SDCFB 64 64 MB SDCFB 128 128 MB IM CW120 E 10 1 DIS Od 10 2 Inserting and Removing PC Card How to Insert a PC Card To the PC card slot on the side of the CW120 121 insert a PC card with its front side up and in the direction of the arrow on top PC card eject button Front side of flash ATA card How to Remove a PC Card Depress the eject button next to the card slot The eject button may be one of two positions depressed and popped out
63. 7 27 7 29 7 30 7 31 9 9 9 16 9 17 10 4 10 6 Index 2 IM CW120 E Index Settings Loading 10 6 14 4 Loading saving eeen 1 3 Saving 1 3 2 8 7 1 7 5 7 7 10 6 Startup screens ssuss 4 4 4 6 T Terminating resistor 11 6 11 7 U Unit 1 3 1 4 2 8 5 3 6 2 6 3 6 4 7 1 7 28 7 29 7 30 7 31 8 1 8 3 9 1 9 11 App2 7 App2 10 App2 16 App2 21 V Voltage and current ranges 6 2 14 3 Voltage range 1 1 2 5 2 8 4 1 4 6 6 1 6 6 6 7 6 9 6 10 7 23 7 25 9 20 14 4 App2 7 Voltage transformer 2 6 5 1 5 4 7 22 MT cus 1 3 2 6 2 8 5 1 5 4 6 2 6 3 6 6 6 7 6 9 6 10 7 1 7 22 7 23 7 25 7 28 13 2 14 4 App2 8 W Wiring 1 1 1 2 2 5 4 6 5 1 544 5 6 5 7 5 8 5 9 6 11 8 1 9 2 9 20 11 7 11 8 14 4 App2 7 App2 13 App2 24 App2 25 App2 26 App2 27 App2 28 Check Function 5 6 Diagorams iiini ienien 5 2 Method 1 3 1 4 2 5 2 8 5 3 5 5 5 7 6 1 6 6 6 7 6 9 6 10 7 27 8 1 8 2 8 3 8 5 9 1 9 2 9 10 9 11 12 6 App2 4 App2 5 Methiods iea eroe 5 2 IM CW120 E Index 3 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com
64. App2 7 App2 9 PC card 4 1 1 1 3 2 2 2 8 2 9 4 2 7 1 7 5 7 7 7 8 7 10 7 13 7 18 8 4 8 5 9 3 9 4 9 6 9 12 9 13 9 14 9 15 9 16 9 21 10 1 10 2 10 3 10 4 10 5 10 6 10 7 13 2 14 4 App1 1 App2 10 App2 11 App2 18 App2 19 App2 23 Enabling Disabling data saving 7 18 Formatting 1 3 2 8 7 8 10 4 Personal computer 1 1 7 19 10 7 11 7 12 5 App2 8 Power failure and recovery Actions upon 9 21 Power supply 2 2 3 3 3 5 4 1 4 2 4 3 4 6 13 1 14 5 App1 1 Printer 1 3 2 2 2 8 7 7 7 19 8 5 11 1 12 3 12 4 12 5 App1 1 App2 2 App2 8 Ranges 1 1 6 1 6 8 7 26 8 1 9 2 13 1 14 1 14 4 14 5 14 8 14 10 14 11 Regenerative electric energy 1 4 9 1 14 3 Regenerative energy 7 9 8 6 9 14 9 21 12 2 App2 4 App2 5 Resetting system 1 3 7 9 RS 232 2 2 7 19 9 18 10 7 11 1 11 2 11 3 11 7 12 3 12 5 14 4 14 6 App2 8 RS 485 2 2 7 8 7 4 7 19 10 7 11 6 11 7 11 8 14 4 14 6 App1 1 App2 8 App2 18 App2 19 Sampling egen het 8 8 14 1 Self test hn cereo 4 4 4 5 13 1 Setting decimal point position 7 28 Setting device number 1 3 Setting item 2 8 6 8 7 1 7 2 7 3 7 4 7 5 7 6 7 7 7 8 7 9 7 10 7 11 7 12 7 13 7 14 7 15 7 16 7 18 7 19 7 20 7 21 7 22 7 24
65. C for 1 minute between power line and casing and between power line and current communication external control input output terminals short circuited Power supply 100 to 240 V AC 10 50 60 Hz Power consumption Maximum 8 VA External magnetic field effects Within accuracy range at 400 A m Dimensions WxHxD Approximately 117 x 161 x 51 mm Weight Approximately 0 6 kg Terminals Voltage inputs CW120 3 jacks for banana plugs safety terminals CW121 4 jacks for banana plugs safety terminals IM CW120 E 14 5 H suoneoyioods 14 1 Specifications of CW120 121 Current inputs H L CW120 2 pair jacks for banana plugs safety terminals CW121 3 pair jacks for banana plugs safety terminals External control input output 3 screw less terminals H L H RS 485 4 M3 screw terminals SG TM Connectors RS 232 Miniature DIN 8 pins AC power supply 2 pins Standard accessories 3 CW120 or 4 CW121 voltage sensing probes Power cord User s Manual Simple setting software Safety standards Compliant with EN61010 1 EN61010 2 031 Voltage input line Overvoltage category III Max input voltage 600 Vrms Power line Overvoltage category II Max input voltage 264 Vrms Pollution degree 2 EMC emission Compliant with EN55011 Group 1 Class A EN61326 EN61000 3 2 EN61000 3 3 The user must implement adequate measures to prevent influences from radio noise emission if necessary Conditions of cable Measured
66. CW120 121 Yes CLAMP ON POWER METERS IM CW120 E Test Equipment 99 Washington Street Depot Melrose MA 02176 Fax 781 665 0780 1 800 517 8431 TestEquipmentDepot com Before Use Before starting measurement with your CW120 or CW121 fill in the Setting Check Sheet in the back of the Operation Guide IM CW120P E with your particular settings to facilitate setting on site YOKOGAWA Q First Edition er UD Se Yokogawa M amp C Corporation Introduction Notes Thank you for purchasing our CW120 or CW121 Clamp on Power Meter This User s Manual explains the functions of the CW120 121 as well as the operating methods and handling precautions Before using the CW120 121 read this manual thoroughly to ensure correct use of the instrument The Operation Guide manual available separately in addition to this manual describes the basic procedures for performing such tasks as measurement operations and settings Use the Operation Guide together with this in depth manual When you have finished reading this manual carefully store it in a convenient place for future reference The contents of this manual are subject to change without prior notice In addition figures and illustrations representing display appearances in this manual may differ from the actual appearances Every effort has been made to ensure the accuracy of this manual If you notice any errors or have any questions however please contact one of the Yokogawa M amp
67. Control Reception Control Control of Data Transmission to Computer Control of Data Reception to Computer Software Hardware Software Hardware Handshake Handshake Handshake Handshake Sends X off Resets CA When Data in RTS to False Quits Quits T Reception When Data in Transmission ransmission Buffer Has Reception Handshaking upon Receipt When CB No Reached 3 Buffer Has No Method of X off CTS Handshake Quarters of the Reached3 Handshake Restarts Becomes Capacity Quarters of the Transmission False Restarts Sends X on Capacity Sets upon Receipt Transmission When Data in CA RTS to of X on When It Reception True When Becomes True Buffer Has Data in Decreased to a Reception Quarter of the Buffer Has Capacity Decreased to a Quarter of the Capacity OFF OFF O O XON XON O O XON RS O O CS RS O O When Selecting OFF OFF Transmission Control No handshake is performed between the CW120 121 and computer The CW120 121 handles the X off and X on codes from the computer as data and ignores CTS CS in JIS e Reception Control No handshake is performed between the CW120 121 and computer After the reception buffer inside the CW120 121 becomes full the overflowed data will be discarded RTS RS in JIS is always true IM CW120 E 11 3 suonounJ uoneoiunuiuo m 11 1 RS 232 When Selecting XON XON Transmission Control A software handshake is performed between the CW120 121 and computer When the CW120 121 re
68. EAS SET key UP DOWN LEFT RIGHT keys ENTER key 1 Using the O Y lt D keys move the decimal point to the desired position 2 Then press the key The setting is changed accordingly and the unit setting begins flashing To cancel the change press the key The setting item selection screen also returns The decimal point moves sequentially by the S Y Cl D keys as shown below rinmnmnmnmnmsg29pnmmmnmnnm oe Walala lala oe nnnnmnn2e EL LILILULILILE S DI SLI SUD S 10 EIL K i 7 30 IM CW120 E 7 2 Setting Each ltem When Setting Unit Specifically 1 After finishing changing the decimal point position setting the unit setting starts flashing to allow you to change it Setting Unit Select the unit from Wh kWh MWh and GWh using the UP DOWN LEFT RIGHT keys MEAS SET key UP DOWN LEFT RIGHT keys ENTER key ESC key 2 Using the O V7 J D keys change the unit 8 Then press the key The setting is changed accordingly and the setting item selection screen returns To cancel the change press the key The setting item selection screen also returns IM CW120 E 7 31 sbumes Huye x 7 3 Setting Name of Measured data File When saving the measured data in the electric energy measurement mode you can set the name of the file to which measured data is to be saved File name xxxxxxxx CSV Name xxxxxxxx Eight or less characters Filename exten
69. HT keys ENTER key ESC key 2 If necessary change the baud rate using the V7 keys The baud rate changes sequentially as follows 7 20 IM CW120 E Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 7 2 Setting Each Item 3 Press the gt key to move to the data bit setting The leftmost number in the lower row flashes If necessary change the data bit setting using the O XJ keys 4 Press the gt key to move to the parity bit setting The middle number in the lower row flashes If necessary change the parity bit setting using the O XJ keys 5 Press the gt key to move to the stop bit setting The rightmost number in the lower row flashes If necessary change the stop bit setting using the O XJ keys 6 After making all necessary changes press the key The settings are changed accordingly and the setting item selection screen returns To cancel the changes press the key The setting item selection screen also returns TIP You can move between the baud rate data bit parity bit and stop bit settings from one to another in the reverse direction by using the J key Resetting the system using a command via communication leaves the baud rate data bit parity bit and stop bit settings unchanged IM CW120 E 7 21 sbumes uye x 7 2 Setting Each Item 7 2 13 Setting VT Ratio VT Description When installing
70. ICKout STARt CARD SEND CARD SETTing CARD STATe CARD TYPE Common Command Group Sets queries the transfer start point Transfers the contents of the file that was specified using the CARD FILEname and CARD TYPE commands Creates a setting file in the PC card and saves the current settings to it Queries the PC card status Sets queries which type of files in the PC card is to be accessed CLS Clears the error queue IDN Queries the meter model IM CW120 E App 2 11 E SpueulUJO2 uoieoriunuliulo2 Appendix 2 Communication Commands Output Queue and Error Queue Output Queue The output queue is provided to store response messages to queries For example when the MEASure INTEgrate VALUe query is sent to request output of measured data the response data will be stored in the output queue until it is read out Data items are stored in sequence in the output queue and then read out on a first in first out basis The output queue is emptied in any of the following cases in addition to a case when it is entirely read out Anew message is received from the personal computer A deadlock occurs The power is turned on again Error Queue The error queue stores the error number and message when an error occurs For example if the personal computer sends an illegal program message the error queue stores error number 113 and the error message Undefined header The contents of the error
71. R3 gt format H 9 parameter 124 Too many digits Do not set a number in 256 digits or more 128 Numeric data not allowed Code the parameter in a format other than lt NRf gt 131 Invalid suffix Check the units suffixes of the voltage current and frequency 134 Suffix too long Check the units suffixes of the voltage current and frequency A unit suffix cannot be used for any item other than 138 Suffix notallowed voltage current and frequency 141 Invalis character data Choose a string from those given in braces CHARACTER DATA Choose a string from those given in braces and 144 MAD Character data too long quote it using the exact spelling CHARACTER DATA Code the parameter in the correct format other than 148 Character data not allowed Elek STRING DATA Enclose the parameter in character string format in 150 2 String data error double quotes 151 STRING DATA The parameter in lt character string gt format is too long or Invalid string data contains an invalid string 158 STR ING DATA Set the parameter in a format other than lt character string gt String data not allowed IM CW120 E App 2 21 E spuewwoy uoneoiunululo2 Appendix 2 Communication Commands Communication Execution Errors Codes 200 to 299 Code Message Countermeasure 200 Execution error The specified command cannot be carried out 221 Setting conflict Check the setting with other related setti
72. Stop at Specified Time on Specified Date This is a method in which you set the integration stop date and time via the setting screen The stop date and time settings are effective only when integration has begun automatically at the start date and time set For the setting procedure see Measurement Procedure in Section 9 1 Measuring Electric Energy and Section 7 2 9 Setting Integration Stop Date and Time When the set stop time and date have been reached the mark disappears from the screen the LED status indicator immediately above the key extinguishes integration stops and the screen changes as shown below indicating that integration has stopped Screen Showing End of Integration r Li FU e II re P Le Pressing any key returns to the screen for instantaneous value measurement TIP Set the stop date and time such that the period from the start to the end of integration is not shorter than the output interval Otherwise only the data at the start and end times will be saved Manually starting integration makes the stop date and time settings ineffective You need to stop integration manually in this case Ifthe start date and time are set to later than in the future the stop date and time the stop date and time will be changed to the time after the start date and time for the output interval Ifthe integration starts at a time after in the future the set stop date and time
73. Syntax SYSTem VOLTage RANGe SYSTem VOLTage RANGe lt NRf gt lt NRf gt 0 150V 1 300 V 2 450 V SYSTem WIRIng Function Sets queries the wiring type Syntax SYSTem WIRIng SYSTem WIRIng lt NRf gt lt NRf gt 0 192W 1 193W 2 993W 3 393W 4 364W App 2 14 IM CW120 E Appendix 2 Communication Commands 1 7 3 INTEgrate Group The commands in the INTEgrate group set or query electric energy measurement parameters INTEgrate Function Queries all the settings relating to electric energy measurement Syntax INTEgrate INTEgrate CLEAr Function Clears integrated values to zero Syntax INTEgrate CLEAr INTEgrate DISPlay Function Queries all the settings relating to measurement screen Syntax INTEgrate DISPlay INTEgrate DISPlay MODE Function Sets queries the type of measurement screen Syntax INTEgrate DISPlay MODE INTEgrate DISPlay MODE lt NRf gt lt NRf gt 0 Display item 1 1 Display item 2 2 Display item 3 3 Display item 4 4 Display item 5 5 Display item 6 INTEgrate STARt Function Queries all the settings relating to the start of measurement Syntax INTEgrate STARt INTEgrate STARt EXECute INTEgrate STARt METHod Function Sets queries the method for starting measurement Syntax INTEgrate STARt METHod INTEgrate STARt METHod lt NRf gt lt NRf gt
74. TEM ALL and MEASure INTEgrate ITEM CLEAr commands Syntax MEASure INTEgrate ITEM VALUe 1 7 5 STATus Group STATus Function Queries all the settings relating to the status of the communication function Syntax STATus STATus ERRor Function Queries the error code and message head of the error queue Syntax STATus ERRor Description If there is no error 0 No error is returned Youcan set whether or not to add the message contents using the STATus QMESsage command STATus OMESsage Function Sets queries whether or not to add the message contents to the STATus ERRor response STATus OMESsage lt Boolean gt STATus OMESsage Syntax IM CW120 E App 2 17 E spuewwoy uoneoiunululo2 Appendix 2 Communication Commands 1 7 6 MEMOry Group The MEMOry group contains commands relating to acquisition of backup data in the internal memory MEMOry DATA Function Queries the number of data backed up in the internal memory Syntax MEMOry DATA MEMOry SEND Function Transfers the data backed up in the internal memory Syntax MEMOry SEND MEMOry SEND STX ASCII code 02H file contents ETX ASCII code 03H The STX and ETX are not attached in RS 485 communication 1 7 7 CARD Group The CARD group contains commands relating to the inserted PC card CARD DELEte Function Deletes the file that was specified using
75. The figure above shows the depressed position Drawn position Depressing the button unlocks the card Pull to remove the card Depressed position Depressing the button changes the position to the popped out position Depress the button again to unlock the card and then pull to remove the card A NOTE Removing the PC card during access to it may destroy the saved files and damage the card itself Before removing the card ensure that Continuous measurement is not in progress Access to the card is not in progress the Z mark is not flashing For details of handling the card see the documentation supplied with the card When transporting the CW120 121 remove the PC card from the slot 10 2 IM CW120 E 10 3 Storage Capacity The time span of data that can be saved varies depending on the output interval The table below shows the approximate time spans over which data can be saved to a PC card for a few cases where there is no other file residing in the card The numbers in parentheses indicate the PC cards capacities Output Interval Guideline of Time Span of Data 1 second Approx 15 hours 1 minute Approx 3 months 16 MB approx 6 months 32 MB at least 1 year 63 MB or larger 30 minutes At least 1 year A NOTE To ensure that data can be saved delete all files from the PC card other than measured data files and setting files Be careful that the total number of files
76. The optional carrying case can accommodate the CW120 or CW121 main unit with its current sensing clamp on probes and voltage probes connected to the unit The case can also hold such accessories as manuals and PC cards and so is useful for transporting a complete set of tools necessary for measurement The optional meter case can be used as a stand during measurement as shown below right It also has a magnetic rear plate and so can be stuck to the door of a power distribution panel or the like Note Keep the meter case away from objects vulnerable to a magnetic field such as floppy disks Manual Voltage probes CW120 121 main unit Adjust the Velcro fastener Carrying Case Meter case 4 IM CW120 E Precautions for Safe Use of the Instrument When operating the instrument be sure to observe the cautionary notes given below to ensure correct and safe use of the instrument If you use the instrument in any other way than instructed in this manual the instrument s protective measures may be impaired Yokogawa M amp C Corporation is by no means liable for any damage resulting from use of the instrument in contradiction to these cautionary notes The following safety symbols are used in the instrument and this manual A Danger Handle with Care This symbol indicates that the operator must refer to an explanation in the instruction manual in order to avoid risk of injury or death of personnel or damage to the instrument
77. V3 Input rms voltages A1 A2 A3 Input rms voltages corresponding to CH1 CH2 and CH3 respectively W Active power with minus sign in case of negative value Var Reactive power with minus sign in case of negative value PF Power factor with minus sign in case of negative value Hz Frequency Wh Active electric energy TIME Elapsed time of integration 3804W 1 3W or 303W 122W epe ERE ms ege egen vor d K N vq g lt AD IM CW120 E 9 11 juswainseayy D4ou3 91179913 n 9 4 Saving Data There are two ways to save measured data to the PC card 1 Manual on demand saving by pressing the key during instantaneous value measurement 2 Auto saving at the preset output interval during electric energy measurement continuous measurement This section describes the latter way Procedure Make settings so as to enable data saving to the PC card see Section 7 2 10 and the data will be saved automatically Conditions Required for Data Saving Start of integration Activated at the set date and time End of integration Activated at the set date and time Output interval Selected from 1 2 5 10 15 and 30 seconds 1 2 5 10 15 and 30 minutes and 1 hour Data saving to PC card Enabled switched on For details of these settings see Chapter 7 Making Settings Output interval Fi 2 3 4 n Start of integration u Data saving End of integration AA NOTE
78. ading Voltage range x VT ratio Range of current reading Current range x CT ratio Range of power reading Rated power x VT ratio x CT ratio IM CW120 E 7 25 sbumes uye x 7 2 Setting Each Item 7 2 15 Selecting Clamp on Current Probe to Be Used i Description The following four models of clamp on current probes can be connected to the CW120 121 Selectable Clamp on Current Probes Clamp on Current Probe Model Setting Rating Ranges 96033 50A 5 10 20 50 A 96030 200A 2 50 100 200 A 96031 500A 50 100 200 500 A 96032 1000A 200 500 1000 A Default 200 A Procedure 1 Using the 5 7 J D keys make the i mark in the lower right and its current setting appear on the screen Then press the key The number representing the currently selected clamp model flashes Selecting Clamp on Current Probe to Be Used MEAS SET key UP DOWN LEFT RIGHT keys ENTER key ESC key 2 Using the O Y Cl D keys select the number corresponding to the desired clamp on current probe The number changes sequentially as follows nn G can annn GE rn L LILI sorz ALILI BT 3 ILILILI so J ILI gg AD 7 26 IM CW120 E 7 2 Setting Each Item 3 After selecting the desired number press the key The probe selection is changed accordingly and the setting item selection screen returns To cancel the change press the key The setting item selection screen also
79. age current input conversion 12 bit resolution 495 Vrms 2 Measurement Functions Item Voltage Current Active Power Method Digital sampling Frequency range 45 to 65 Hz reciprocal method detected from V1 input Crest factor 150 or 300 V range 2 for rated input 450 V range 1 56 for rated input 3 for rated input Effective input range 10 to 110 of each rated range Lower limit 1 5 V for all rated ranges 0 4 of each range Display range Upper limit 13096 of each rated range for all ranges other than 450 V 110 of rated range for 450 V range 130 of each rated range Temperature coefficient 0 07 of rng range C including clamp on probe 0 05 of rng range C Display update period Approximately 1 second IM CW120 E 14 1 H suoneoyi2ods 14 1 Specifications of CW120 121 3 Instantaneous Value Measurement Measured parameters Rms voltage V rms current A active power W frequency Hz Measurement accuracy At power factor 1 including clamp on probes Voltage 0 3 rdg 0 2 rng Current and active power 0 8 rdg 0 4 rng with probe 96030 96031 or 96033 1 2 rdg 0 8 rng with probe 96032 Frequency 0 1 rdg 1 dgt Calculated parameters Reactive power Var power factor Calculation accuracy Value calculated from measurement 1 dgt Power factor effects 1 0 rng cos 0 5 relative to pow
80. ansmitting data the CW120 121 quits the transmission Then when it detects that CTS has become true next it restarts the transmission The CW120 121 handles X on X off codes sent from the computer as data Reception Control A software handshake is performed between the CW120 121 and computer When the free space in the reception buffer decreases to 256 bytes the CW120 121 resets RTS RS in JIS to false When the free space in the reception buffer increases to 768 bytes the CW120 121 sets RTS to true IM CW120 E 11 1 RS 232 Precautions for Reception Control While a CW120 or CW121 is controlling a data reception by a handshake data may be sent from the computer even when the free space in the reception buffer is less than 256 bytes In this case regardless of whether a handshake for data reception is set overflowed data will be discarded after the reception buffer becomes full After free space appears in the reception buffer data begins being stored to the buffer again lt 1024 bytes Used Pipe 256 bytes unused EN 3 Used 768 bytes unused Po Used TIP When performing a handshake if the free space in the buffer has decreased to 256 bytes because the internal data transfer is too slow the reception stops After the status above when data was transfer internally and the free space in the buffer has increased to 768 bytes the reception restarts After
81. ar on the screen Then press the key The day setting flashes Integration Start Date and Time Change Screen Year month and day Hour minute second MEAS SET key UP DOWN LEFT RIGHT keys A Sr cats ENTER key ESC key 2 Using the keys select an item year month day hour minute or second you want to change where the year month and day are shown with superscripts y m and d to avoid confusion The selected item flashes 3 Using the X7 keys change the value of the selected item When changing a number pressing the 6 X7 key continuously will make quick changes 7 14 IM CW120 E 7 2 Setting Each Item 4 After making all necessary changes press the key The start date and time settings are changed and the setting item selection screen returns To cancel the changes press the key The setting item selection screen also returns A NOTE Set a valid date and time If the start date and time are set to before the current time or if the specified start date and time has passed before a start after setting integration will start at the appropriate time deter mined by the output interval Ifthe start date and time are set to the same as the stop date and time or to later than the stop date and time the stop date and time are automatically set to the point after the output interval from the start date and time Resetting the system
82. aracter Idle state of line Start bit Data bits 7 or 8 bits Parity bit Odd even or none Puts the line back to idle state dashed line or sends start bit solid line IM CW120 E suoloun 4 uoneorunuiuio2 m Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com Chapter 12 Auxiliary Functions 12 1 Convenient Functions Clock The CW120 121 have a built in clock which is adjusted to the Japan standard time by default factory setting The date and time display formats are YYYMM DD YY is the last two digits of the year and hh mm ss as shown below The accuracy of the clock is 100 ppm typical Date and Time Setting Display l Year month day Hour minute second To change the date and time use the setting screen SEE ALSO For clock adjustment see Section 7 2 6 Changing Date and Time in Chapter 7 Making Settings Backlight for LCD You can turn on and off the backlight for the LCD by pressing the key When no key actions have been performed for 10 minutes or longer the backlight is turned off automatically Key Lock Pressing the key for three seconds or more locks the keys and causes the Pal key lock mark to appear on the screen To unlock press the key for three seconds or more The keys are unlocked and the Pal key lock mark disappears from the screen TIP
83. ard The file number consists of three digits and can be set to any number from 000 to 029 TIP Name of setting file WTHnnn SET where nnn is the file number you set from 000 to 029 Procedure 1 Using the V7 J D keys in the setting item selection screen make the A mark to appear on the screen Then press the key L ad begins flashing Loading Saving Selection Screen MEAS SET key UP DOWN LEFT RIGHT keys ENTER key ESC key 2 Using the J D keys select L a Hd or G IE 3 Press the key to confirm the selection A three digit number appears on the lower row allowing you to set the file number of the file to from which you want to save load settings To cancel loading saving press the amp key The setting item selection screen returns IM CW120 E 7 5 sbumes Huye x 7 2 Setting Each Item Loading File Number Setting Screen for Loading MEAS SET key UP DOWN LEFT RIGHT keys SS Q Ss V ENTER key ESC key 4 Specify the file number in accordance with the steps below 5 Using the X C keys select the digit to be changed The selected digit flashes 6 Using the 6 YV keys change the number of the selected digit 7 After making necessary changes press the key The settings are then loaded and the setting item selection screen returns You cannot select the file number of a file that does not exist Selecting
84. ard S BS standard Communication 1 With RS 232 C interface interface 2 With RS 485 interface C1 Clamp on current probe for 20 200 A 2 pieces set C2 Clamp on current probe for 20 200 A 3 pieces set C3 Clamp on current probe for 50 500 A 2 pieces set C4 Clamp on current probe for 50 500 A 3 pieces set C5 Clamp on current probe for 200 1000 A 2 pieces set Option codes C6 Clamp on current probe for 200 1000 A 3 pieces set C7 Clamp on current probe for 5 50 A 2 pieces set C8 Clamp on current probe for 5 50 A 3 pieces set PB1 Meter case carrying case CF pack PM1 Meter case carrying case CF pack and 91011 PM2 Meter case carrying case CF pack and 91009 No serial number Refer to this serial number on the nameplate when contacting the vendor about the instrument Accessories Make sure that the package contains all the accessories listed below and that they are all free from any damage Product Name Part Number Qty Remarks 1 Power cord B9988YA D UL CSA standard One of the four options B9988TB F VDE standard B9988YC R SAA standard B9988YD S BS standerd 2 Voltage probes for CW120 91018 3 Color Black red yellow Voltage probes for CW121 91007 4 Color Black red yellow blue 3 User s Manual IM CW120 E 1 4 Operation Guide IM CW120P E 1 IM CW120 E Checking Items in the Package Peripherals Optional The products list
85. ation stop date and time STOP 10 Whether to save data to PC card Z 11 Selection of communication device DEV 12 Communication settings COM 13 VT ratio setting 14 CT ratio setting 15 Probe selection 16 Decimal position and unit selections for electric energy watt hours DIGIT Indications during Measurement g o v D lt o o z D x INTEG Lights when integration is carried out flashes when integration is on stand by Lights when integration is controlled by external signals Lights when PC card memory is full Lights when the backup memory contains data Lights when the battery voltage is low Lights when the keys are locked Lights when data saving to the PC card is enabled flashes during access to the PC card Flashes during access to the PC when a PC is selected as the communication device Flashes during access to the printer when a printer is selected as the communication device Lights when the VT ratio is set at a value other than 1 Lights when the CT ratio is set at a value other than 1 sS D O S 88gB Indications for current settings of voltage range current range and wiring method e 150V 200 450V 1g2W 1g3W 3e3W 3o4W Wiring method EL X DRE MN Voltage range lt i Current range 5A 10A 20A 50A 100A 200A 500A 1000A 2 8 IM CW120 E 2 4 Overrange and Other Marks Shown during Measurement Meanings of Messages Displayed M
86. bes only errors messages relating to communication These messages are divided into the following groups by the error code Command syntax errors Communication execution errors Query errors Command execution errors e System error Codes 100 to 199 Codes 200 to 299 Codes 400 to 499 Codes 600 to 799 Code 912 App 2 20 IM CW120 E Appendix 2 Communication Commands Command Syntax Errors Codes 100 to 199 Code Message Countermeasure 102 Syntax Error Check the command string There is an error other than y those corresponding to codes 103 158 103 DATA SEPARATOR Use commas to separate data parameters from each Invalid separator other 104 PATA Code the parameter in the correct data type Data type error 108 DATA Too many parameters are set Check the number of Parameter not allowed parameters 109 DATA Code all the necessary parameters Missing parameter 111 HEADER SERARATOR Separate the header from data by a space Header separator error 112 mnemonic Check the mnemonic an alphabetical letter followed by a Program mnemonic too long number 113 Ubdefined header Check the header 114 HERDER Check the header Header suffix out of range 120 M ll daia arei No mantissa is set in a numeric data An lt NRf gt format parameter requires a numeric value 123 Exbornidht Too larde Reduce the number that follows E in an lt N
87. blue 0 Differentiating between Clamp on Current Probes Use accompanying ring markers of four different colors to differentiate clamp on current probes for correct connections CW120 Terminals CH1 to CH2 CW121 Terminals CH1 to CH3 Use of Ring Markers Attach ring markers of the same color to both ends of the probe cable for easy identification NCAUTION Be careful not to damage a probe when attaching ring markers 2 4 IM CW120 E Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 2 3 Operation Keys and Display Keys Integration status LED indicator KEY LOCK ey SAVE MEAS SET RESET and setting screens START amp STOP key Starts and stops integration ENTER key Confirms an entry such as a change to a setting ESC escape key Name Key Symbol Description V RANGE key Used to set and change the voltage range A RANGE key Used to set and change the current range WIRING key Used to set and change the wiring method phase lines Also used to check the wiring Pressing this key for three seconds or more accesses the wiring check screen LIGHT key Switches on off the backlight of the LCD Also used to lock and unlock the keys Pressing this key for three seconds locks the keys To unlock press the key agai
88. breviated response The COMMunicate HEADer command has no effect on character data lt Boolean gt Boolean is a type of data that indicates ON or OFF and is expressed in one of the following forms Form Example ON OFF lt NRF gt ON OFF 10 When expressing Boolean in lt NRf gt form OFF is selected if the rounded integer value is 0 and ON is selected if the rounded integer is non 0 Aresponse message is always 1 if the value is ON and 0 if itis OFF Character String Data gt Character string data is an arbitrary character string unlike the character data which uses only specific characters The character string must be enclosed in single quotation marks or double quotation marks 0 Form Example Character string data ABC IEE488 2 1987 f a character string contains a double quotation mark use two double quotation marks to indicate it This rule also applies to a single quotation mark within a character string Response messages always use double quotation marks around the character string Since Character string data is an arbitrary character string leaving the end single quotation mark or double quotation mark will cause the CW120 to interpret the program message unit as part of the character string data As a result errors may not be detected properly Filename Filename is da
89. ccessed Clear the backup memory contents via the setting Screen Note that this loses data saved in the backup memory 6 The meter cannot be controlled through the serial interface Check that the communication parameters are set correctly for both the computer and meter Check that the correct type of cable is used for the intended application 7 An error code appears during the self test There is an error in the hardware Contact the vendor from which you purchased the instrument IM CW120 E 13 1 5 Bunooys jqnoIL 13 2 Error Codes Error Code Description crs COU i Error in SRAM with battery backup Err Litic EEPROM has been initialized Er rLLz3 Checksum error of EEPROM Err LILI ilegal data in EEPROM Erre LIIL Failure in writing to EEPROM Er r Lb RTC has been initialized Er r Li i Error in RTC Er r LB Error in PC card controller E rr LL Settings have been initialized t cr II itl Illegal settings t cr itl i Failure in writing to PC card Fo Wi P CC wie Failure in reading from PC card Cl wis TT err ula Maximum number files in PC card exceeded Co IO CC wat A PC card other than a flash ATA card is inserted E cr IL i t PC card not yet formatted Co i D CC LD A PC card not supported is inserted co WI Err uli t Failure in deleting a measured value file Er Fr IH Failure in
90. ceives the X off code from the computer while transmitting data the CW120 121 quits the transmission Then when it receives the X on code next it restarts the transmission The CW120 121 ignores CTS CS in JIS from the computer Reception Control A software handshake is performed between the CW120 121 and computer When the free space in the reception buffer decreases to 256 bytes the CW120 121 transmits the X off code to the computer When the free space in the reception buffer increases to 768 bytes the CW120 121 transmits the X on code to the computer RTS RS in JIS is always true When Selecting XON RS Transmission Control A software handshake is performed between the CW120 121 and computer When the CW120 121 receives the X off code from the computer while transmitting data the CW120 121 quits the transmission Then when it receives the X on code next it restarts the transmission The CW120 121 ignores CTS CS in JIS from the computer Reception Control A software handshake is performed between the CW120 121 and computer When the free space in the reception buffer decreases to 256 bytes the CW120 121 resets RTS RS in JIS to false When the free space in the reception buffer increases to 768 bytes the CW120 121 sets RTS to true When Selecting CS RS Transmission Control A software handshake is performed between the CW120 121 and computer When the CW120 121 detects that CTS CS in JIS has become false while tr
91. ch you purchased the instrument Do not attempt to repair the instrument yourself as doing so is extremely dangerous Handling of Power Cord Useonly the cord supplied from Yokogawa M amp C to prevent electric shocks and fire Do not place any load on the power cord or allow the power cord to come into accidental contact with any heat source When unplugging the power cord from the outlet hold its plug rather than holding and pulling the cord itself Ifthe power cord is damaged contact the vendor from which you purchased the instrument Fuses Fuses built into this instrument for protection cannot be replaced by the user When any built in fuses need to be replaced such as because they have blown contact the vendor from which you purchased the instrument IM CW120 E Contents Introductton eee 1 Checking Items in the Package s eccessecesseeeeeeeeeeeseeseeeeeesseaeseseneeesenesesseeeeneeees 2 Precautions for Safe Use of the Instrument eene 5 Chapter 1 Product Overview eseeeeeeeeseseeeeeeeeeeen nennen nennen nnne 1 1 1 1 iis eee A H 1 1 Chapter 2 Components and Indications eese 2 1 2 1 Front Panel and Connector Block 2 1 2 2 Connecting Input Signals ssssseeeeeneeeenn ene 2 3 2 3 Operation Keys and Display ccceesceeseeeeeeeeeeeeeneeeeeeeeneeseaeeeaeeseatenee
92. ck on Up to 30 files can be saved to a PC card corresponding to file numbers from 000 to 029 attempting to save too many files causes Err UI to appear This will disappear and the measurement screen will return when any key is pressed Delete an unnecessary file or files and try saving again If there is something wrong with the inserted PC card data cannot be saved and Hr dE rr appears The measurement screen will return when any key is pressed When the PC card becomes full the gl BB mark appears and data will not be saved Saving the measured data when the communication device is set to a printer causes the gag mark to flash and prints the data at the same time as the data saving File Name and Format Measured data are saved to a CSV format file and the file name MWTH followed by a number is given automatically File name MWTHxxx CSV Name xxx The smallest unused number from 000 to 029 Filename extension Always CSV Command INTEgrate STORe FILEname Filename Example of Saved Measured Data Shown below is an example of a measured data file that was saved in a PC card when opened from a spreadsheet application that has a CSV file converter The field configuration varies depending on the measurement conditions CW12x File Type 2 Measure Mode OUTPUT OUTPUT INTEG START INTEG START ELAPSED DATE TIME DATE TIME Time
93. e Display of File Number for Auto saving Integration mode mark Saving to PC card mark File number ED t LED status indicator pred Flashes during integration standby state START i jo e START amp STOP key Integration will begin at an appropriate time determined from the output interval set INTEG J mark flashes INTEG mark lights LED flashes LED lights Integration in Integration standby progress GG Integration start n date and time set E LED status indicator Start of integration End of START determined from output interval set integration amp STOP 9 6 IM CW120 E 9 2 Starting and Stopping Integration TIP When setting the integration start date and time consider the time period you need to finish all actions for setting the date and time and putting the meter into the integration standby state The start date and time may be passed before finishing the setting Ifthe start date and time are set to later than in the future the stop date and time the stop date and time will be changed to the time after the start date and time for the output interval The manual saving action takes precedence over the automatic start setting Upon pressing the key for one second or more to start saving manually the start date and time settings become ineffective To reset the integration standby state press any key to return to the measurement sc
94. e Data file AWTH005 CSV AWTHO005 CSV File name AWTHO05 CSV The data in the backup memory is processed as follows When a PC Card Having Sufficient Free Space Is Inserted during Integration When a PC card is inserted the data from that time on is saved to the PC card with the same file name as before Then when integration ends the data stored in the backup memory will be copied to the bottom of the last file i e data is added within the last file in the PC card During this copying action dt H Toi is displayed on the screen and it will change to In E EL End indicating that integration has ended PC card that has become full Integrated data File name AWTHOO05 CSV Copy IM CW120 E 9 15 juswainseayy D4ou3 91179913 n 9 5 Backup Memory When a PC Card Having Sufficient Free Space Is Not Inserted during Integration Data is continuously saved to the backup memory If integration ends after the PC card has become full or when it is not inserted you need to carry out either of the procedures below If Data Is Needed Follow the procedure below to copy the data from the backup memory to a formatted new PC card 1 Insert a new formatted PC card 2 Press the key to call the setting item selection screen 3 Using the O V7 D keys select MAM make the MAM mark appear 4 Press the key Toi then flashes on the screen 5 Press the key again The data is then copied from the backu
95. e S X7 J D keys select FE if you want to connect to a personal computer or Fr o if you want to connect to a printer 3 After making a change press the key The change is made effective and the setting item selection screen returns To cancel the change press the key The setting item selection screen also returns A NOTE Q when a personal computer is selected or dg when a printer is selected flashes during access to the corresponding device SEE ALSO For the computer connection see Chapter 11 Communication Functions For the printer connection see Section 12 2 Using Optional Printer IM CW120 E 7 19 sbumes Durem x 7 2 Setting Each Item 7 2 12 Making Communication Settings COM Description Follow the procedure below to set the baud rate data bits parity bit and stop bits to match the specifications of the device to connect to Baud rate 1200 2400 4800 9600 or 19200 bps 9600 bps by default Data bits 7 or 8 8 bits by default Parity r1 for no parity default E for even parity ri for odd parity Stop bits 1 or 2 1 bit by default Procedure 1 Using the Y X D keys in the setting item selection screen make the COM mark and the current communication settings appear on the screen Then press the key The baud rate setting flashes Communication Setting Screen Baud rate Data bits parity stop bits MEAS SET key UP DOWN LEFT RIG
96. e inputs there may be discrepancies between the CW120 121 and other instruments that operate based on different measurement principles Note 2 The plus minus sign is displayed by multiplying the polarity obtained based on the varmeter method 5 Electric Energy Measurement Measured parameters Active electric energy regenerative electric energy not displayed only saved as data Measurement accuracy Measurement accuracy for active power 1 dgt with standard settings Integration function settings Start stop Manual specified time external trigger remote control Output interval Can be selected from 1 2 5 10 15 and 30 seconds 1 2 5 10 15 and 30 minutes and 1 hour Display digits Automatic decision based on the rated power The maximum resolution can be set IM CW120 E 14 3 H suoneoyi2ods 14 1 Specifications of CW120 121 6 Display Functions Display screen Backlit segmented LCD Maximum display digits 4 digits for data other than electric energy 6 digits for electric energy Ranges ratings 96032 Probe 200 1000 A 96031 Probe 50 500 A 96030 Probe 20 200 A 96033 Probe 5 50 A Voltage Phase Range Lines 1 2W 750 0 W 1 500 kW 3 000 kW 7 500 kW 15 00 kW 30 00 kW 75 00 kW 150 0 kW 1p3W 1 500 kW 3 000 kW 6 000 kW 15 00 kW 30 00 kW 60 00 kW 150 0 kW 300 0 kW 393W 1 500 KW 3 000 KW 6 000 kW 15 00 kW 30 00 kW 60 00 kW 150 0 kW 300 0 kW 304W 12 250 KW 4 50
97. e of the measured voltage exceeds 130 of the rated range Indications When the Measured Value Is Too Small Displayed Item Condition Indication Voltage lt 1 5V DV Current lt 0 4 of rated range 0A Active power lt 0 17 of rated range ow Reactive power lt 0 17 of rated range 0 Var Active electric energy lt 0 17 of rated range 0 Wh integration stopped Displayed Item Condition Indication Reactive power V1 input lt 10 of rated range or frequency Var lt 40 Hz or 270 Hz Power factor The voltage or current is displayed as ov or PF V1 input lt 10 of rated range or frequency lt 40 Hz or 270 Hz Frequency lt 40 Hz or z70 Hz Hz Even when an instantaneous value is displayed as or the integration calculation is carried out continu ously The accuracy of the electric energy value however is undefined in this case IM CW120 E 2 7 suoneoipu pue sjueuoduo2 D 2 4 Overrange and Other Marks Shown during Measurement Indications of Setting Items Mark appearing during setting mode Setting Item Displayed Mark 1 Device number NO 2 Loading and saving of settings Qn 3 Deletion of measured data file and formatting of PC card FILE 4 Clearance of electric energy count watt hours and resetting of system 5 Copying and clearance of backup memory MEM 6 Date DATE 7 Output interval INTER 8 Integration start date and time START 9 Integr
98. e of Full Scales Rated Power The table below shows the rated powers corresponding to combinations of voltage and current ranges Voltage V Range Phase Lines Current A Range 96031 Probe 50 1000 A 96031 Probe 50 500 A 96030 Probe 20 200 A 96033 Prob e 5 50 A 5 000 A 10 00 A 20 00 A 50 00 A 100 0 A 200 0 A 500 0 A 1 000 kA 150 V 12W 750 0 W 1 500 kW 3 000 kW 7 500 KW 15 00 kW 30 00 kW 75 00 kW 150 0 kW 123W 1 500 kW 3 000 kW 6 000 kW 15 00 kW 30 00 kW 60 00 kW 150 0 kW 300 0 kW 303W 1 500 kW 3 000 kW 6 000 kW 15 00 kW 30 00 kW 60 00 kW 150 0 kW 300 0 kW 3O4W 2 250 kW 4 500 kW 9 000 kW 22 50 KW 45 00 kW 90 00 kW 225 0 kW 450 0 kW 300 V 122W 1 500 kW 3 000 kW 6 000 kW 15 00 kW 30 00 kW 60 00 kW 150 0 kW 300 0 kW 123W 3 000 kW 6 000 kW 12 00 kW 30 00 kW 60 00 kW 120 0 kW 300 0 kW 600 0 kW 3O3W 3 000 kW 6 000 kW 12 00 kW 30 00 kW 60 00 kW 120 0 kW 300 0 kW 600 0 kW 3O4W 4 500 kW 9 000 kW 18 00 kW 45 00 kW 90 00 kW 180 0 kW 450 0 kW 900 0 kW 450 V 122W 2 250 kW 4 500 kW 9 000 kW 22 50 kW 45 00 kW 90 00 kW 225 0 kW 450 0 kW 123W 3O3W 4 500 kW 4 500 kW 9 000 kW 9 000 kW 18 00 kW 18 00 kW 45 00 kW 90 00 kW 45 00 kW
99. e the setting item displayed Select a digit Change a setting 7 2 IM CW120 E 7 1 Setting Items and Item Selection Setting Procedure 1 Press the key The display changes from the measurement screen to the screen for setting the setting item selection screen and the sign appears in the lower left Device number setting screen MEAS SET key UP DOWN LEFT RIGHT keys ee ENTER key ESC key 2 Using the O X7 Cl D keys select the desired item and then press the key Each time one of the O YV J D keys is pressed the setting item changes sequentially as follows 5 0rp aD AD b OD b b N0 3 ENJ DATE INTER START gorg KE V9 KE V9 KE V9 elt edu vd S S vd v4 vd vd E 9 COM OH STOP To cancel a setting after pressing the key press the key The setting item selection screen then returns 3 After making necessary changes to the settings press the key to return to the measurement screen TIP The MEM backup memory setting is skipped if no data exists in the backup memory and the MEM mark is not lit on the measurement screen The DEV communication device setting is skipped if your CW120 121 model has an RS 485 inter face The setting item that is selected by default when the screen changes from the measurement screen is the item selected last time the measurement screen was returned from a setting screen
100. ecimal Point Position and Unit for Electric energy x 1 3 Max Count 1 to 9 999 W 0 00 to 9999 99 Wh 10 to 99 99 W 0 0 to 99999 9 Wh 100 to 999 9 W 0 000 to 999 999 kWh 1 to 9 999 kW 0 00 to 9999 99 kWh 10 to 99 99 kW 0 000 to 999 999 kWh 100 to 999 9 kW 0 00 to 9999 99 MWh 1 to 9 999 MW 0 0 to99999 9 MWh 10 to 99 99 MW 0 000 to 999 999 MWh 100 to 999 9 MW 0 00 to 9999 99 GWh 1 to 9 999 GW 0 00 to 9999 99 GWh 10 to 99 99 GW 0 0 to99999 9 GWh 100to 9999 GW 0 to 999999 GWh Multiply by 1 3 only when the CT or VT ratio is a value other than 1 SEE ALSO For the setting procedures see Chapter 7 Making Settings 6 4 IM CW120 E 6 1 Ranges and Display Digits When the electric energy count has reached the maximum the count will be reset to zero as illustrated below A 999 999 kWh Power 0 Time N WARNING When newly starting integrating power clear the electric energy count and the elapsed time of integration Otherwise the electric energy count will be added to the previous value For details of how to clear the electric energy count see Section 9 2 3 Clearing Electric Energy Count or Section 7 2 4 Clearing Electric Energy Count and Resetting System in Chapter 7 Making Settings IM CW120 E 6 5 Doum DUU pue sobuey Pumes e 6 2 Changing Voltage Range Setting Procedure to Change Voltage Range Setting 1 The am sign is displayed uppermost on
101. ed is displayed for approximately two seconds only if data saving to the PC card is enabled see Section 7 2 10 then the file number display disappears and anti SLATE appears indicating that the power meter has entered the integration standby state IM CW120 E 9 4 9 2 Starting and Stopping Integration Display of File Number for Auto saving Integration mode mark Saving to PC card mark File number LED status indicator Flashes during integration standby state START amp STOP START amp STOP key When the specified time on the specified date has been reached integration begins INTEG J mark flashes INTEG mark lights LED flashes LED lights Integration in Integration standby gt lt 44 DES x eL D LED status indicator Integration start End of integration START date and time set amp STOP IM CW120 E 9 5 juswainseayy D4ou3 91179913 n 9 2 Starting and Stopping Integration f Start Date and Time Are Set to Past Point of Time Earlier than Current Time Pressing the s key flashes the mark on the screen and LED status indicator The file number of the file to which the data is to be saved is displayed for approximately two seconds only if data saving to the PC card is enabled see Section 7 2 10 then the file number display disappears and Jet Er SLA E appears indicating that the power meter has entered the integration standby stat
102. ed below are available as optional peripherals For technical and ordering inquiries concerning the peripherals contact the vendor from which you purchased the instrument If you purchased any one of the optional peripherals together with the CW120 121 make sure it is free from any damage Product Name Part Number Minimum Order Qty Remarks Clamp on current probe for 20 200 A 96030 1 See the option codes for a choice of probe kits Clamp on current probe for 50 500 A 96031 1 See the option codes for a choice of probe kits Clamp on current probe for 200 1000 A 96032 1 See the option codes for a choice of probe kits Clamp on current probe for 5 50 A 96033 1 See the option codes for a choice of probe kits Power supply cable 98030 1 Not applicable to CE and UL pending Voltage probes for CW121 91007 4 1 set Voltage probes for CW120 91018 3 1 set RS 232 serial printer cable 91010 Printer 97010 1 With 1 thermal paper roll and 1 battery pack AC adapter for printer 94006 1 Power supply 200 240 V AC AC adapter for printer 94007 1 Power supply 100 120 V AC Thermal printer paper 97080 10 rolls Carrying case 93022 1 For CW120 Series Meter case 93023 1 For CW120 Series CF pack 16 MB 97030 1 Compact flash memory and compact flash adapter TIP Keep the packing box in case you need to transport the instrument IM CW120 E 3 Checking Items in the Package Housing CW120 121 and Accessories
103. ed values and electric energy watt hours CW120 Supports single phase two wire single phase three wire and three phase three wire circuits CW121 Supports single phase two wire single phase three wire three phase three wire and three phase four wire circuits The following explains the features of the CW120 121 shows a schematic diagram of their functions and describes the contents displayed on the screen in each measurement mode Features A Wealth of Functions Fast data saving for a long time Data can be saved at 1 second intervals at fastest A PC card slot for large removable memories such as flash ATA and compact flash cards allows measurement over a long time Instantaneous value saving Simply pressing the SAVE key will save the measured values Wiring error check The connections are checked and any error is displayed before the start of measurement Broad Ranges e Voltage range 150 300 450 V e Current range 4 types of clamp on probes can be used 96033 clamp on probe 5 10 20 50 A 96030 clamp on probe 20 50 100 200 A 96031 clamp on probe 50 100 200 500 A 96032 clamp on probe 200 500 1000 A Ease of Data Processing and Communication Data can be saved to a PC card Via communication data can be transferred to a personal computer and the measurement conditions can be set from a computer As the communication interface you can choose when ordering RS 232 or RS 485 the RS 485 interface allows mul
104. efined characters Enable Disable 3 ON Character type Normal Special 4 ON Character of zero 0 5 ON 4 6 0N L Encoding character set Japanese 7 ON 8 ON DIP SW 3 Setting Item ON OFF 1 ON Data bits 8 bits 7 bits 2 ON Parity use not use Not use Use 3 ON Parity even odd Odd Even 4 OFF Flow control H W BUSY XON XOFF 5 OFF OM uh Baud rate 9600 bps 7 ON 8 ON 3 Turn off the power to the printer IM CW120 E 12 2 Using Optional Printer TIP For details of how to change the printer settings see the documentation supplied with the printer If the characters printed with the print mode selection in DIP SW 2 set to 80 columns OFF are too small to read change the setting to 40 columns ON Setting in CW120 121 When using a printer a setting needs to be made also in the CW120 121 Procedure With reference to Section 7 2 11 Selecting Communication Device in Chapter 7 Making Settings select a printer as the communication device Either a printer or personal computer can be connected via the RS 232 interface select a printer when connecting to a printer Selecting a Personal Computer Selecting a Printer LI sus III SET DEV MEAS SET key UP DOWN LEFT RIGHT keys ENTER key ESC key The amp mark flashes on the screen during access to the printer IM CW120 E 12 5 suonoung ueiixny D 12 2 Using Opt
105. efore access to the internal assembly is extremely hazardous For inspection and or adjustment of the in ternal assembly contact the vendor from which you purchased the instrument Use of the Instrument in a Gas Atmosphere Do not operate the instrument in a location where any flammable or explosive gas vapor is present It is extremely hazardous to operate the instrument in such an atmosphere Inspection of Power Source Before turning on the instrument always make sure the voltage of the power source to be applied matches the instrument s supply voltage Use of Clamp on Current Probes When using clamp on current probes keep the circuit voltage below 600 V AC in order to avoid possible short circuits or accidents resulting in injury or death Ensure that the rated current of the circuit you measure matches the rating of the current probe Avoid using the instrument if it has been exposed to rain or moisture or if your hands are wet Do not use clamp on current probes with any non insulated conductors Measures In Case of Anomalies If the instrument begins to emit smoke becomes too hot or gives off an unusual smell imme diately turn it off and disconnect the power cord from the outlet Also turn off power to the object under measurement that is connected to the instrument s input terminals Never at tempt to use the instrument again If any such anomalies as noted above occurs contact the vendor from whi
106. ely 3 meters Standard accessories One User s Manual ring markers 4 colors x 2 each L4007MG Safety standards Compliant with EN61010 1 EN61010 2 032 Overvoltage category II CAT Il max input voltage 600 Vrms e Overvoltage category Ill CAT Ill max input voltage 300 Vrms Pollution degree 2 Compliant with EN5501 1 Group 1 Class A and EN61326 1997 These products are goods in Class A designed for industrial environments For home use the user must implement adequate measures to prevent influences from radio noise emission EMC emission 14 8 IM CW120 E 14 2 Specifications of Clamp on Current Probes EMC immunity Compliant with EN61326 1997 Effect on measurement input under immunity environment 20 of range or less Dimensions of 96030 and 96031 Clamp on Current Probes Unit mm 73 2 9 approx inches D 130 5 1 E IM CW120 E 14 9 H suoneoyioods 14 2 Specifications of Clamp on Current Probes 2 96032 Clamp on Current Probe Item 96032 Max 1000 A Range Measurement range 0 to 1000 Arms AC 1414 Apk for 5 minutes Output voltage 0 to 0 25 Vrms AC 0 25 mV A Accuracy Amplitude 1 0 of rdg 0 2 mV 45 Hz to 66 Hz Phase 1 0 for 50 A or higher 45 Hz to 66 Hz Under the conditions of the temperature at 23 C 5 C humidity at 35 to 7596 RH with sine wave inpu
107. eparate two commands each command is a separate message Specify the command header for each command even when the commands from the same command group are being concatenated App 2 4 IM CW120 E Appendix 2 Communication Commands Higher level Query A query with a question mark on the topmost level command in a group is called a higher level query Executing a higher level query allows all the setup data items available with the group to be received at one time A response to a higher level query can be sent exactly as it was received as a program message to the CW120 Rules of Header Interpretation The CW120 interprets a received header according to the following rules Mnemonics are not case sensitive Example SYSTem can also be written as system or System The lower case portion of a header can be omitted Example SYSTem can also be written as SYSTE or SYST The question mark at the end of the header denotes a query You cannot omit the question mark Example SYSTem cannot be abbreviated to anything shorter than SYST If the x numeric value at the end of the header is omitted it is assumed to be 1 Example If CHANnel lt x gt is written as CHAN this represents CHAN1 1 38 Response Upon receiving a query from the personal computer the CW120 returns a response message to the computer A response message is sent in either of the following forms Response consisting of a
108. er factor 1 with probe 96030 2 0 rng cos 0 5 relative to power factor 1 with probe 96031 96032 or 96033 Reactive factor effects 1 0 rng sing 0 5 relative to reactive factor 1 with probe 96030 2 0 rng sing 0 5 relative to reactive factor 1 with probe 96031 96032 or 96033 4 Equations Rms voltage 2 1 7 2 T Vrms 4A v t dt aH 5 v t Rms current T a qo xg Arms T jit dt JT 7 i t Active power vit iQdt l vit i Single phase three wires 1 3W or three phase three wires 363W XP P1 P2 Three phase four wires 304W XP P1 P2 P3 v i i t Input signals T One cycle of input signal 14 2 IM CW120 E 14 1 Specifications of CW120 121 Reactive power and power factor Reactive Power Note 1 Apparent Power Power Factor Note 2 102W Q VA P VA V x A P VA 103W Qi VAi Vi x Ai 4 VAi Pi i 1 2 i 1 2 EVA VA1 VA2 EQ Q1 Q2 323W Qi VAi Vi x Ai 4 VAi Pi i 1 2 i 1 2 XVA 3 2 VA1 VA2 P ZVA EQ Q1 Q2 324W Qi VAi Vi x Ai 4 VAi Pi i 1 2 3 i 1 2 3 XVA VA1 VA2 VA3 EQ Q1 Q2 Q3 Calculation The rated value depends The rated value depends on range on the voltage and current the voltage and current ranges 1 to 1 ranges Display Same as active power Only calculated internally 21 000 resolution not displayed nor saved as data Note 1 For distorted or unbalanced wav
109. erter PC RS 232 RS 485 converter Example Yokogawa M amp C ML1 converter Terminating resistor On Terminating resistor On CW120 21 CW120 121 o lolo o Communication cable Communication cable Up to 31 meters SD send data RD receive data SD send data RD receive data TM Terminating resistor short circuiting with the terminal switches on the terminating resistor SG Signal ground IM CW120 E 11 7 suoloun 4 uoneorunuiuio2 m 11 2 RS 485 Device Address A device address needs to be assigned to each device on an RS 485 network The device number set in each CW120 121 is identified as the device address SEE ALSO For device address setting see Section 7 2 1 Setting Device Number in Chapter 7 Making Settings A NOTE The device number must be unique within the same system for correct communication Cable Used Use shielded cables containing 2 twisted pairs of AWG 24 conductors N WARNING Turn off the power when performing wiring for the terminals to avoid electric shock 1 1 8 IM CW120 E 11 3 Data Format The serial interface of the CW120 121 performs asynchronous transmission In an asynchronous transmission each character is carried in such a way that 7 or 8 data bits are preceded by a start bit and followed by a parity bit optional and 1 or 2 stop bits in order see also the figure below 1 ch
110. es noted above occurs the corresponding status bit is set The bit is cleared when the status is read App 2 12 IM CW120 E Appendix 2 Communication Commands COMMunicate VERBose Function Sets queries whether the response to a query is returned in full or abbreviated form Syntax co lt Boolean gt unicate VERBose COMMunicate VERBose Example COMMUNICATE VERBOSE ON COMMUNICATE VERBOSE gt COMMUNICATE VERBOSE 1 1 7 2 SYSTem Group The commands in the SYSTem group set or query system parameters SYSTem Function Queries all the system settings Syntax SYSTem SYSTem BACKlight Function Sets queries whether the LCD backlight is set to ON or OFF SYSTem BACKlight SYSTem BACKlight Boolean Syntax SYSTem CLAMp Function Sets queries the type of clamp Syntax SYSTem CLAMp SYSTem CLAMp lt NRf gt lt NRf gt 0 5to50A 1 20 to 200 A 2 50 to 500 A 3 200 to 1000 A SYSTem CURRent Function Queries all the settings relating to the current range Syntax SYSTem CURRent SYSTem CURRent RANGe Function Sets queries the current range Syntax SYSTem CURRent RANGe SYSTem CURRent RANGe lt NRf gt lt NRf gt 0 5A 10A 20A 50A 100A 200A 500A 1000A NOR WD SYSTem DATE Function Sets queries the date Syntax SYSTem DATE SYSTem DATE lt NRf1 gt NRf2
111. essage Meaning mc Appears during standby of integration when set to start at a set date and time Arm ILLI Appears during standby of integration when a past point of time is set as the Ei Ce i integration start time and date and integration will begin at the nearest TE appropriate time determined by the output interval lnk E L Appears when integration has finished normally with the set integration Coo start stop dates and times Lrg OD can Appears when a power failure has occurred or the power has been turned off LR AL during standby or integration CL 0 e Lirti yt Appears when the backup data is copied from the backup memory to the PC FL card Low oa Vn 4 ri Li Appears when a PC card is not inserted err E il E Shows the file number and data record number when saving measured nnn nma instantaneous values LILILI_ Lit rur ate L Shows the file number when integration begins in the case that data saving to aE a PC card is enabled but the filename is not specified E ii E Appears when integration begins in the case that data saving to a PC card is W a r enabled and the filename is specified The digits following FILE indicate OCT Wu defined IM CW120 E 2 9 suoneoipu pue sjuguodwog D Chapter 3 Precautions for Safe Measurement 3 1 Handling Precautions If you are a first time user be sure to read Precautions for Safe Use of Instrument on pages 4 and
112. etenees 2 5 2 4 Overrange and Other Marks Shown during Measurement 2 6 Chapter 3 Precautions for Safe Measurement ccceeeseeeeeeeeseeeeeeeeeseeees 3 1 3 1 Handling Preca tions 2 5 Ra ee pep ey 3 1 3 2 Installation Procedure A 3 3 3 3 Maintaining High Precision of Measurement seen 3 5 Chapter 4 Connecting Power Supply and Turning Power On Off 4 1 4 1 When Using AC Power Supply c ceecceeeeeseeeeeneeseeeeeeeeteaeeeneeeeeeseaeeeaeeee 4 1 4 2 When Supplying Power from Voltage Input 4 3 A B Start p Screeris ciisaseit eren eit eiui 4 4 4 4 Basic Operation Flow sessseeeneeenenenenneenn ennemis 4 6 Chapter 5 Wiring ee ee NEEN Eege 5 1 5 1 Precautions for Wiring the Circuit under Test 5 1 5 2 Diagrams of Basic WINING ih tritt ced a aei 5 2 5 3 Wiring the Circuit under Test with External VT CT ssssseceeeeeseeeereeeeee 5 4 5 4 Indication and Change of Wiring Method 5 5 5 5 Wiring Check F ncliom eie ne e emet tie 5 6 Chapter 6 Setting Ranges and Wiring Method eese 6 1 6 1 Ranges and Display Digits e e 6 1 6 2 Changing Voltage Range Setting sssssseeene 6 6 6 3 Changing Current Range Setting ssssseee 6 7 6 4 Changing Wiring Method Setting seeseeeeeeeeeeeeneeneeineineennerreenerrnnrnnenee 6
113. ey outputs the measured data to a file Automatic saving Measured data is output to a file periodically at a specified interval after measurement begins 2 Settings The current settings of measurement conditions are output to a file or printer App 3 2 IM CW120 E Appendix 3 File Structures and Data Items Printed 2 Measured Data 2 1 File Format Measured data files are in CSV format Each file contains the file identifier file type number measurement mode titles of measured data items data field titles and measured values From the second and subsequent times when data is saved to the same file only the measured values are added CW12x lt File identifier characters File Type 0 lt File type number MeasureMode 1 lt Measurement mode OUTPUT DATE OUTPUT TIME data title Wh lt Title of measured data items data field titles yyyy mm dd hh mm ss measured value x xxxxxE xx lt Measured value record 1 yyyy mm dd hh mm ss measured value x xxxxxE xx lt Measured value record 2 2 1 1 File Identifier Characters for identifying that the file was created by a CW120 or CW121 are output File identifier CW12x 2 1 2 File Type The file type identification code is output following FileType Identification Code File Type 0 File containing data saved automatically 2 File containing current measured data saved manually 3 File containing settings 2 1 3
114. g appear on the screen Then press the key The digit of the one place flashes CT Ratio 1 00 ESC key CT Ratio 10000 0 a LILILILILI SET MEAS SET key UP DOWN LEFT RIGHT keys ENTER key 2 Using the lt gt keys select the digit to be changed The selected digit flashes 3 Using the 5 YV keys change the number 4 After making necessary changes press the key The CT ratio setting is changed accordingly and the setting item selection screen returns To cancel the changes press the key The setting item selection screen also returns 7 24 IM CW120 E 7 2 Setting Each Item A NOTE TheCT ratio cannot be changed when the electric energy count or the elapsed time of integra tion is not zero Attempting to change the ratio causes Co 7 7 to appear on the screen this will disappear and the measurement screen will return when any key is pressed Clear the electric energy count first For details of how to do this see Section 9 2 3 Clearing Electric Energy Count or Section 7 2 4 Clearing Electric Energy Count and Resetting System in this chapter Asetting that causes the product of VT ratio x CT ratio x rated power x 1 3 to exceed 9999 GW is not allowed TIP Example of CT ratio setting When using a 100 to 5 A transformer the transformer ratio is 20 1 So set the CT ratio to 20 Displayed values Range of voltage re
115. he model and version numbers the CW120 121 performs a self test If no error is found the measurement screen appears 3 Measurement Screen Example of measurement screen Lili j Upper Rms voltage L ri ri ri ower Rms curren a LI LI LI A L R t IM CW120 E 4 4 4 3 Startup Screens Self test Details and Error Handling Test Items and Errors No Test Item Error Number s 1 Backup SRAM check Err Lll ZD mmi Zo mnm 2 EEPROM check coro ores IL Ane ZD mm 3 Real time clock check COLA to CCELUU I Lr nd IL i Setting check Erro rrr iu 5 External memory controller check t TC cutie If an error is found during the self test an error number is displayed Confirm the error number and press any key then the screen changes to the measurement screen A NOTE If an error is found with any of test item Nos 1 3 and 4 backup SRAM check real time clock check and setting check the settings date and time will be initialized The above situation may occur when the backup battery has become flat When the C273 low battery sign is displayed on the screen the backup battery needs to be replaced The backup battery cannot be replaced by the user For replacement contact the vendor from which you purchased the instrument The backup battery life is about 10 years SEE ALSO For details of errors and the countermeasures see Chapter 13 Trouble
116. ight or close to a heat source close to a noise source such as high voltage equipment or a power source exposed to a relatively large amount of lampblack steam dust or corrosive gas exposed to frequent mechanical vibration close to a source of strong electromagnetic fields or unstable IM CW120 E 3 3 Maintaining High Precision of Measurement To achieve a high precision of measurement use the CW120 121 under the following conditions Ambient temperature 23 5 C Ambient humidity 35 to 7596 RH no condensation When installing the CW120 121 in a location where the ambient relative humidity is 30 or less use such equipment as an anti static mat to prevent electrostatic discharge If you move the CW120 121 from an area of low temperature and humidity to an area of high temperature and humidity or if there is a sudden change in the ambient temperature condensation may occur in the meter If this happens let the meter stand for at least one hour to allow it to adapt to the new ambient temperature and for condensation to evaporate Then start operating the meter Relationship between Clamp and Conductor 1 When performing a measurement hold the clamp on probe so that the conductor cable runs through the center of the clamping CT 2 Ensure that the orientation of the clamp to the direction of the conductor cable from the power supply to the load is correct as shown in the figure 3 Ensure that the c
117. in a card does not exceed 100 IM CW120 E DIS Od 10 4 Formatting PC Card The CW120 121 can format a PC card in MS DOS format Format the card before using a newly purchased card or to erase all files in the card Formatting a PC Card with CW120 1 Insert the PC card in the slot 2 When the measurement screen is displayed press the key to call the setting item selection screen 3 Select IES i e make the Ed mark appear 4 Press the key cELALL flashes on the screen 5 Using the O Y J D keys select fn IE Data Deletion Screen Formatting Screen 6 Press the key 7 The Z mark flashes indicating that access to the PC card is in progress When the mark stops flashing and disappears the formatting has finished 8 To return to the measurement screen press the key SEE ALSO For details of the respective settings see Section 7 2 3 Deleting Measured data Files and Formatting PC Card in Chapter 7 Making Settings 10 4 IM CW120 E 10 5 Saving and Loading from to PC Card Saving Measured Data to PC Card There are two ways to save measured data to a PC card 1 Pressing the key during instantaneous value measurement 2 Auto saving at a preset interval during electric energy measurement continuous measurement Saving Data During Instantaneous Value Measurement Press the key when the measurement screen is displayed and a one shot action of saving
118. ing conditions 150 300 V range If the sampled value exceeds 200 of the rated voltage or if the rms value of the measured voltage exceeds 110 of the rated range 450 V range If the sampled value exceeds 156 of the rated voltage or if the rms value of the measured voltage exceeds 110 of the rated range UO Indicates an overcurrent This mark appears if the sampled value exceeds 30096 of the rated current or if the rms value of the measured current exceeds 11096 of the rated range TIP The HDD mark appears when any one of the input signals from terminals V1 to V3 satisfies the condi tions noted above The MA mark appears when any one of the input signals from terminals CH1 to CH4 satisfies the conditions noted above rr indication The CW120 121 show Or instead of a usual number representing the measured value if any one of the following conditions is met The number representing the measured value exceeds 9999 the maximum number displayed 2 6 IM CW120 E 2 4 Overrange and Other Marks Shown during Measurement TIP Voltage 150 300 V range If the sampled value exceeds 200 of the rated voltage or if the rms value of the measured voltage exceeds 130 of the rated range Voltage 450 V range If the sampled value exceeds 156 of the rated voltage or if the rms value of the measured voltage exceeds 110 of the rated range Current If the sampled value exceeds 300 of the rated voltage or if the rms valu
119. ional Printer Example of Printout For instantaneous value measurement with 1 2W wiring method 2001 12 01 11 00 00 Time of output Integration start tim gt oc start 2001 12 01 10 00 00 e i l AR apsed time o Elapsed time 1 00 00 integration r V1 110 0 V TA I1 30 00 A nstantaneous values P 2 850 kW Q 1 664 kVar PF 0 860 LE 50 00 Hz Electri Wh 889 20 KWh ectric __ 4 energies L Wh 0 00 KWh P Active power PF Power factor Q Reactive powery F Frequency SEE ALSO For print data see Appendix 3 File Structures and Data Items Printed TIP The printout above is an example when the print mode is set to 40 columns ON in DIP SW 2 See the DIP switch settings described on the page before the previous one 12 6 IM CW120 E Chapter 13 Troubleshooting 13 1 Corrective Measures in Case of Failure This section describes corrective measures in case a failure occurs with the CW120 or CW121 If the meter does not operate properly after taking the corrective measures shown in the table below or any other failure that is not covered in this section occurs contact the vendor from which you purchased the instrument If an error code is displayed refer to Section 13 2 Error Codes Problem 1 The meter cannot be turned on Things to Check Check that the power cord is firmly plugged into the power outlet Check that you are no
120. iring the Circuit under Test When connecting the CW120 121 turn off the circuit under test It is extremely dangerous to connect or disconnect probes to from a live circuit Be extremely careful not to connect any voltage mode circuit to the current input terminals or any current mode circuit to the voltage input terminals Miswiring can result in not only dam age to the circuit or equipment under test but also injury to personnel Do not connect any probes which are not necessary i e not used for the current measure ment even though multiple probes can be connected to the CW120 121 at the same time Do not use any probe other than the clamp on current probes or voltage probes supplied Do not use a clamp on current probe for a non insulated conductor Ensure that the rating of the clamp on current probe you use matches the rating of the mea sured current Before connecting a clamp on current probe to the CW120 121 make sure the plug is inserted with the correct H L polarities IM CW120 E 2 3 suoneoipu pue sjuguodwog D 2 2 Connecting Input Signals 0 Differentiating between Voltage Probes Voltage probes are differentiated by color for correct connections Probe for terminal N Probe with a black alligator plug Probes for terminals V1 to V3 Probes with a red yellow or blue alligator plug Accompanying probes CW120 Three black red and yellow CW121 Four black red yellow and
121. itt Invalid PC card memory card Insert a flash ATA memory card r inc The inserted PC card has not yet been 605 Err wi Card not formatted formatted in MS DOS format Format it with the power meter r3 A PC card not supported by the power Co WIL i 908 cor wie Can not use this card meter is inserted lt An error relating to the PC card other than See ae E 607 LErr iiu PC card error the above has occurred System Error Code 912 Code Message Countermeasure 912 Fatal error Communication driver Needs to be serviced Other Errors Codes 350 and 390 Code Message Countermeasure 350 Queue overflow Read the error queue 390 Overrun error RS 232 Decrease the baud rate IM CW120 E App 2 23 E spuewwoy uoneoiunululo2 Appendix 2 Communication Commands 3 Command Effectiveness Tables 1 COMMunicate Group een E sea Wiring Check Setting COMMunicate De v v v HEADer WA v v v HEADer v v oY v STATus WA WA WA v VERBose v WA WA v wi Effective Blank Ineffective App 2 24 IM CW120 E Appendix 2 Communication Commands 2 SYSTem Group POENI eile A e oed Wiring Check Setting SYSTem WA WA WA v BACKlight WA WA v v BACKlight v WA WA v CLAMp WA WA v v CLAMp Cond CURRent v oY oY oY CURRent
122. k 1 Device number NO 2 Loading and saving of settings CONF 3 Deletion of measured data file and formatting of PC card FILE 4 Clearance of electric energy count and resetting of system 5 Copying and clearance of backup memory MEM 6 Date DATE 7 Output interval INTER 8 Integration start date and time START 9 Integration stop date and time STOP 10 Data saving to PC card Z 11 Communication device selection DEV 12 Communication settings COM 13 VT ratio setting 14 CT ratio setting 15 Clamp on current probe selection 9 16 Decimal point position and unit selections for electric energy DIGIT TIP The Setting Check Sheet in the back of Operation Guide IM CW120P E lists necessary settings and their available selections Use this sheet for grasping the setting conditions and for efficient setting on site IM CW120 E sbumes Huye x 7 1 Setting Items and Item Selection Keys Used for Setting The keys used for setting are described below Device number MEAS SET key UP DOWN LEFT RIGHT keys ENTER key key Used to toggle the display between measurement and setting screens The mark is displayed on a setting screen key Used to fix a selection Q9 key Used to cancel a setting Pressing this key returns to the preceding Screen O XJ keys Used to Change the setting item displayed Change a number Change a setting X D keys Used to Chang
123. lamping CT is properly closed Power supply source side Conductor cable Clamping CT Load side IM CW120 E 3 5 juauiaJnseo y JLS 10 suonneoaJd D Chapter 4 Connecting Power Supply and Turning Power On Off 4 1 When Using AC Power Supply Before Connecting Power Supply There is a danger of electric shock or damage to the meter Observe the following warning notes N WARNING Use only the dedicated power cord supplied by the manufacturer Before connecting the power cord make sure the power source voltage matches the rated supply voltage Before connecting the power cord also make sure the power switch of the CW120 or CW121 is turned off If the CW120 or CW121 will not be used for a prolonged period disconnect the power cord from the outlet Do not place any load on the power cord or allow the power cord to come into accidental contact with a heat source Be sure to hold the plug of the power cord rather than holding and pulling the cord itself when disconnecting it from the outlet Procedure for Connecting Power Cord Follow the steps below to connect the power cord 1 Make sure the power switch of the CW120 121 is turned off 2 Plug one end of the power cord supplied with the CW120 121 into the power supply jack on the side of the CW120 121 3 Plug the other end of the power cord into a power outlet that meets the requirements below Required Power Ratings
124. lso during instantaneous value measurement IM CW120 E 8 3 jueuieJnseo y enj eA snoeuejuejsu n 8 3 Saving Data There are two ways to save measured data to the PC card 1 Manual on demand saving by pressing the key during instantaneous value measurement 2 Auto saving at the preset output interval during electric energy measurement continuous measurement This section describes the former way Procedure Pressing the key when the measurement screen is displayed during instantaneous value measurement causes a one shot action of saving all the measured values This action is referred to as manual saving 1 When the measurement screen is displayed press the key The file number then appears on the screen and all the measured values are saved File Number Display upon Manual Saving Saving to PC card mark Data record number File number SAVE key 2 Pressing the key again saves the measured values again with the data record number incremented but with the file number unchanged 8 4 IM CW120 E 8 3 Saving Data A NOTE The file name will be given automatically The file number is renewed in the following cases 1 the data record number has exceeded 99 2 the wiring method has changed 3 the or actions have been carried out in the setting screen 4 the PC card is removed or a PC card is inserted and 5 the power is turned off once and then ba
125. ly pressing the key for three seconds or more in the measurement screen For this see Section 9 2 3 Clearing Electric Energy Count IM CW120 E 7 9 x sbumes Buren 7 2 Setting Each Item 7 2 5 Copying and Clearing Backup Memory Contents MaM Description The CW120 121 have a memory for backing up the PC card When the PC card becomes full or is removed data is saved to the backup memory For details see Section 9 5 Backup Memory When no data resides in the backup memory namely when the MaI mark is not displayed on the measurement screen this setting item cannot be called Select DHEA Co to copy the data in the backup memory to the PC card Select HEA dEL to delete the data from the backup memory Procedure 1 Using the A Y J D keys in the setting item selection screen make the QU mark to appear on the screen Then press the key dt H CoP appears and LaF flashes Copy Screen Deletion Screen LIU TL l LI O98 MEAS SET key UP DOWN LEFT RIGHT keys ENTER key ESC key 2 Using the O X7 J D keys select Lo if you want to copy the data in the backup memory to the PC card or JEL if you want to delete the data from the backup memory 3 Press the key The selected action takes place and the setting item selection screen returns To cancel copying or deleting data press the key The setting item selection screen also returns
126. me gt Denotes a file name lt Decimal gt lt Decimal gt indicates a value expressed as a decimal number as shown in the table below Decimal values are given in the NR form specified in ANSI X3 42 1975 Symbol Description Example lt NR1 gt Integer 125 1 1000 NR2 Fixed point number 125 0 90 00 1 lt NR3 gt _ Floating point number 125 0E 0 9E 1 1E4 lt NRf gt Any of the forms lt NR1 gt to lt NR3 gt is allowed lt NRf gt represents the case when any of the forms lt NR1 gt to NR3 can be used The CW120 accepts decimal values from the personal computer in any form The form among NR1 to NR3 used for the response message is predetermined for each query The same form is used irrespective of whether the value is large or small When using lt NR3 gt the after the E can be omitted but the cannot If a value outside the setting range is specified the closest valid value will be used If the value specified is beyond the precision of the CW120 the value will be rounded Voltage Times Frequency Voltage Time and Frequency indicate decimal values which have a physical dimension lt Multiplier gt or Unit can be attached to the lt NRf gt form The values are specified in any of the following forms Form Example
127. n INSTALLATION CATEGORY OVERVOLTAGE CATEGORY IV INSTALLATION CATEGORY OVERVOLTAGE CATEGORY IV Primary supply level overhead lines cable systems etc This category is not relevant to this standard The CW120 121 meet the following overvoltage categories with the respective usage voltages Voltage measurement circuit 600 V CAT III and 300 V CAT IV Power supply 240 V CAT II Pollution Degree Pollution degree describes the degree to which a solid liquid or gas which deteriorates dielectric strength or surface resistivity is adhering 2 applies to normal indoor atmosphere Normally only non conductive pollution occurs Occasionally however temporary conductivity caused by condensation must be expected The CW120 121 meet the Pollution degree 2 NCAUTION When using or installing two or more CW120 121 power meters leave a distance of at least 10 mm 0 4 between them When putting a power meter inside a power distribution panel or the like leave a space of at least 10 mm 0 4 from a wall and ensure that excess pressure may not be applied to the protruding plugs and jacks on the terminals IM CW120 E 3 3 juauiaJnseo y aes 10 suonneoaJd D 3 2 Installation Procedure Level Location Do not install the CW120 121 in an unstable or inclined location inaccurate measurements may result Other Conditions Do not install the CW120 121 in a location that is exposed to direct sunl
128. n example for the single phase two wire method V1 Rms voltage value appearing with V1 on meter screen n Rms current value appearing with A1 on meter screen P Active power value appearing with W on meter screen Q Reactive power value appearing with Var on meter screen PF Power factor value appearing with PF on meter screen F Frequency value appearing with Hz on meter screen Wh Active electric energy value appearing with Wh on meter screen Wh Regenerative energy not appearing on meter screen SEE ALSO For details see Appendix 3 File Structures and Data Items Printed 9 14 IM CW120 E 9 5 Backup Memory A NOTE The CW120 121 have a built in memory for backing up the PC card and can be used for saving data up to 3000 times Data is saved to the backup memory in the following cases When the PC card becomes full the il BS mark appears The PC card is removed during integration When data resides in the backup memory the MEM mark is displayed The data stored in the backup memory is retained during power off The data in the backup memory is cleared whenever integration starts Namely starting integration when previous data is retained in the backup memory deletes it When an attempt is made to save data to the backup memory more than 3 000 times Eech appears and the saving action is aborted Backup memory Inserting New PC card File nam
129. n for three seconds or more Saves the measured data during instantaneous SAVE key value measurement MEAS SET key MEAS SET Switches over the display between the measurement amp STOP Cancels a setting and returns to the preceding screen Also used to clear the electric energy count watt hours Pressing this key for three seconds or more accesses the screen for clearing the electric energy count Cursor movement keys UP DOWN LEFT RIGHT keys D In measurement screen Switches the display contents In setting screen Changes the selection or number or moves the cursor position flashing digit over digits Integration status LED indicator Lit when the integration is carried out and flashes when it is on stand by IM CW 20 E 2 5 suoneoipu pue sjuguodwog D 2 4 Overrange and Other Marks Shown during Measurement N WARNING When the overrange mark appears with the range set to a maximum it means that the input exceeds the maximum allowable level of the CW120 121 Do not apply an input level higher than the maximum allowable input level NCAUTION When measuring an input signal level exceeding the rated range use a voltage transformer VT or current transformer CT When using a VT or CT thoroughly read Section 5 3 Wiring the Circuit under Test with External VT CT Overrange Indications UIT Indicates an overvoltage This mark appears in the follow
130. ng an optional printer allows you to print measured data and settings The printer can be connected only to a model with the RS 232 interface Printer Specification Model Yokogawa M amp C 97010 Seiko Instruments DPU 414 printer Specifications Printing method Thermal serial dot printing Number of columns to print 80 Character presentation 9x7 dots Print speed 52 5 mm s Paper width 112 mm Connection Use the RS 232 port Printer cable Model 91010 1 Turn off the power to the printer The power lamp turns off 2 Connect the printer to the CW120 121 as shown in the figure below Printer Power switch Online switch 9 pins Printer cable 91010 IM CW120 E 12 3 suonoung ueiixny D 12 2 Using Optional Printer Checking Printer Settings k Then the printer settings are printed in English 2 Check that the initial settings as shown in parentheses inside the tables below are left Printer Initial Settings DIP Switch Settings Keep pressing the Online switch of the printer and turn on the power DIP SW 1 Setting Item ON OFF 1 OFF Input type Parallel Serial 2 ON Printing speed High Low 3 ON Auto loading Enable Disable 4 OFF CR or CR LF CR LF CR 5 ON Setting command Enable Disable 6 OFF 7 7 ON Printing density 100 8 ON DIP SW 2 Setting Item ON OFF 1 OFF Print mode 40 columns 80 columns 2 ON Backup of user d
131. ngs 222 Data out of range Check the setting range 223 Too much data Check the byte length of the parameter 224 Illegal parameter value Check the setting range 241 Hardware missing Check the options equipped Query Errors Codes 400 to 499 Code Message Countermeasure 410 Query INTERRUPTED Check the transmission reception sequence 420 Query UNTERMINATED Check the transmission reception sequence Limit the length of each program message within 1024 430 Query DEADLOCKED bytes including the lt PMT gt 440 Query UNTRMINATED Do not code a query following IDN2 after indefinite response App 2 22 IM CW120 E Appendix 2 Communication Commands Command Execution Errors Codes 600 to 799 Code Message Countermeasure TU E i 600 LOC ES PC card not ready The PC card is not set Insert a PC card r Ina A writing access is disabled since the PC 601 err iu t PC card write error card was removed during access or the card is damaged Insert a card that is not damaged a A reading access is disabled since the PC Co I CC iuc PC card read error card was removed during access or the 602 card is damaged Insert a card that is not damaged i11 The number of files that can be created in 603 err wid Directory full the card has exceeded the limit Delete unnecessary files or use a different card r Iit The inserted PC card is not a flash ATA 604 CT
132. nici ee here 7 1 D Frequency measurement 8 7 8 8 Data Displayed 8 1 9 1 Saving 1 1 1 8 2 8 2 9 7 1 Installation essss 9 8 13 1 7 12 7 13 8 4 8 5 9 3 Instantaneous value measurement 9 4 9 6 9 12 9 15 1 3 1 4 2 5 4 6 8 1 8 3 10 5 10 6 8 4 9 1 9 8 9 10 9 12 Date 1 3 2 8 2 9 4 5 7 1 7 9 mp Oe leroy EE 7 11 8 6 9 14 9 21 12 1 12 2 App2 4 App2 5 IM CW120 E Index 1 Index N O P Integration Starting and stopping 9 3 Integration start date 8 6 Integration start date and time 2 8 2 9 7 1 7 14 7 15 8 6 9 4 9 5 9 6 9 7 9 14 App2 4 App2 5 App2 7 Integration stop date and time 2 8 7 1 7 16 7 17 9 7 9 8 Key ra aaa a aari aaa bi 2 5 ele 12 1 13 1 Eoading 2 ee 2 8 7 1 7 5 Maximum allowable input 2 6 5 1 Maximum allowable input voltage 5 1 Measured file essssss 13 2 Measured data file Namimg a ninen an 7 32 Measured data file Deleting 7 8 13 2 Measuring electric energy 9 1 Narming 4 eet App2 10 Oltage range eeeeeeeieeeeeeeeeeeeneeeeeeene 4 1 Output interval 1 3 2 8 2 9 7 1 7 12 7 13 7 15 7 17 7 18 8 4 9 6 9 7 9 8 9 12 10 3 10 5 13 2 14 3
133. nse messages Each buffer has a capacity of at least 1024 bytes The number of bytes available will vary depending on the operating condition of the CW120 If both buffers become full at the same time the CW120 becomes inoperative This condition is called a deadlock To resume normal operation discard response messages A deadlock will not occur however if the size of the program message including the PMT is kept below 1024 bytes A deadlock never occurs if the program message does not contain any query IM CW120 E App 2 3 E spuewwoy uoneoiunululo2 Appendix 2 Communication Commands 1 2 Commands Commands There are two types of command program header that can be sent from the personal computer to the CW120 They differ in the format of their program headers Common Command Header Commands defined in IEEE 488 2 1987 are called common commands The header format of a common command is shown below An asterisk always precedes a common command lt Mnemonic gt lt Mnemonic gt Compound Header Commands other than common commands that are dedicated to the CW120 are classified and arranged in a hierarchy according to their functions The format of a compound header is shown below A colon is used to specify a lower level header lt mnemonic gt mnemonic lt mnemonic gt lt mnemonic gt lt mnemonic gt lt mnemonic gt Simple Header A simple header is a functionall
134. nseayy D4ou3 91179913 n 9 1 Measuring Electric Energy Measurement Procedure 1 Perform safety checks with reference to Chapter 3 Precautions for Safe Measurement 2 Turn on the power to CW120 121 with reference to Chapter 4 Connecting Power Supply and Turning Power On Off 3 Perform wiring with reference to Chapter 5 Wiring 4 Setthe ranges and wiring method with reference to Chapter 6 Setting Ranges and Wiring Method 5 Set measurement conditions with reference to Chapter 7 Making Settings 6 Call the measurement screen with reference to Chapter 8 Instantaneous Value Measurement 7 Measure the electric energy watt hours A NOTE During integration continuous measurement or standby for integration no settings can be modified but they can be viewed by pressing the key for checking 9 2 IM CW120 E 9 2 Starting and Stopping Integration 9 2 1 Starting Procedures There are three ways to start integration Manual start Pressing the key for one second or more starts integration Automatic start at the specified time on the specified date Setting the start date and time via the setting screen and pressing the key puts the meter into the integration standby state After this when the specified time is reached integration begins Remote start by external control signal A signal input from the external control terminals starts integration For details see Sec
135. nstrument IM CW120 E 3 1 juauiaJnseo y aes 10 suonneoaJd D 3 1 Handling Precautions e After Use After use disconnect the power cord from the outlet Precautions for Use of the Clamp CAUTION The clamping CT current transformer is precision assembled to ensure high performance When using the clamp do not apply any intense mechanical shock vibration or force to the clamping CT If dust or any other foreign matter gets in the clamping CT do not shut the clamping cores tight First remove the dust and then make sure the clamping cores on both sides close smoothly IM CW120 E 3 2 Installation Procedure Install the CW120 121 in a location that satisfies the following conditions Indoors Ambient Temperature and Humidity Ambient temperature 0 C to 50 C Ambient humidity 5 to 85 RH no condensation Altitude of Location Altitude 2000 m or less Overvoltage Categories CAT Installation category Overvoltage category describes a number which defines a transient overvoltage condition It implies the regulation for impulse withstand voltage INSTALLATION CATEGORY OVERVOLTAGE CATEGORY II Local level appliances PORTABLE EQUIPMENT etc with smaller transient overvoltages than INSTALLATION CATEGORY OVERVOLTAGE CATEGORY III INSTALLATION CATEGORY OVERVOLTAGE CATEGORY III Distribution level fixed installation with smaller transient overvoltages tha
136. nt A locas SORS differs depending on the wiring method Active power WwW WwW Reactive power Var Var Power factor PF Frequency Hz Hz input frequency of V1 Electric energy watt hours Wh Wh Elapsed time of integration Hour minute second 00 00 00TIME Hour minute 0000 00TIME Hour 00000hTIME The display format changes over between the above automatically depending on the elapsed time Measurement Procedure Perform safety checks with reference to Chapter 3 Precautions for Safe Measurement Turn on the power to CW120 121 with reference to Chapter 4 Connecting Power Supply and Turning Power On Off Perform wiring with reference to Chapter 5 Wiring Set the ranges and wiring method with reference to Chapter 6 Setting Ranges and Wiring Method Set measurement conditions with reference to Chapter 7 Making Settings Measure instantaneous values IM CW120 E 8 1 jueujeJnseo y enj eA snoeuejuejsu n 8 2 Switching Display Contents Pressing one of the UP DOWN LEFT RIGHT keys changes the display contents in order The sequence differs depending on the wiring method set For example the sequence when the single phase two wire method is chosen is shown below Even for the unseen data items the respective calculations are performed internally Sequence of Display Contents Switching for Single phase Two Wires Measurement Screen 46 or or Upper Lower Upper Lower
137. nt and the integration time are not zero Attempting to load settings causes r 7 to appear on the screen this will disappear and the measurement screen will return when any key is pressed Clear the electric energy count first For details of how to do this see Section 9 2 3 Clearing Electric Energy Count or Section 7 2 4 Clearing Electric Energy Count and Resetting System in this chapter TIP When the PC card is full the IR sign is displayed on the screen and the saving cannot be per formed Saving the settings when the communication device is set to a printer prints the settings at the same time IM CW120 E 7 7 sbumes Huye x 7 2 Setting Each Item 7 2 3 Deleting Measured data Files and Formatting PC Card HE3 DOPO Select cELALL to delete all the measured data saved in the PC card Select in IL to format the PC card Procedure 1 Using the 0 Y Cl D keys in the setting item selection screen make the mark to appear on the screen Then press the key dELALL begins flashing Measured data Deletion Screen PC Card Formatting Screen MEAS SET key UP DOWN LEFT RIGHT keys Gees ENTER key ESC key 2 Using the O V X D keys select d HI Lif you want to delete the measured data or n E if you want to format the PC card 3 Press the key The selected action takes place and the setting item selection screen returns To cancel the
138. ntegration standby state and when a setting screen is displayed However it is ineffective when integration has already begun and is on Monitoring time A start to stop period must be at least 30 seconds long Do not change the input signal within 30 seconds Input levels Low 0 0 to 0 8 V High 2 0 to 5 0 V Allowable voltage The allowable voltage for the input terminals is 0 5 to 5 5 V 9 6 2 Controlling Multiple CW120s and or CW121s When performing measurement with multiple CW120s and or CW121s you can synchronously start and stop integration in all the CW120s and CW121s by connecting external control terminals Connecting a Control Signal in Parallel to Control AII Meters Synchronously Meter No 1 START STOP Control signal Meter No 2 START STOP Meter No 3 START STOP 5 5V MAX Controlling Meter Nos 2 and 3 by Control Signal of Meter No 1 Meter No 1 Meter No 2 Meter No 3 START STOP START STOP START STOP 5 5V MAX 5 5V MAX 5 5V MAX relie Ef rj23 ef rj23 H L H H L H L H N DUT N 1 0UT7 N 1 0UT juswainseayy D4ou3 91179913 n 9 6 External Control Input Output 9 6 3 Wiring for Terminals Wiring for External Control Input Output Terminals With a flatblade screwdriver or the like
139. number pressing the S Y key continuously will make quick changes 4 After making all necessary changes press the key The stop date and time settings are changed and the setting item selection screen returns To cancel the changes press the key The setting item selection screen also returns 7 16 IM CW120 E 7 2 Setting Each Item A NOTE Set a valid date and time You cannot set the stop date and time to the same time or before the start date and time Resetting the system changes the integration stop date and time to 30 minutes after the cur rent time since the output interval is initialized to the default 30 minutes TIP For the year set the last two digits The range of the year setting is 00 to 99 years 2000 to 2099 SEE ALSO For details of the start and stop of integration see Section 9 2 Starting and Stopping Integration IM CW120 E 7 17 sbumes Huye x 7 2 Setting Each Item 7 2 10 Enabling Disabling Data Saving to PC Card GH Description This determines whether to save the measured data during electric energy measurement to the PC card Select EL oo to enable switch on saving Select r EL ot E to disable switch off saving By default the saving is enabled switched on Procedure 1 Using the O6 Y Cl D keys in the setting item selection screen make the A mark and the current on off setting appear on the screen Then press the key The setting flashes
140. on and data items to be saved INTEgrate STORe Syntax INTEgrate STORe STATe Function Sets queries whether data output is set to ON or OFF Syntax INTEgrate STORe STATe INTEgrate STORe STATe Boolean INTEgrate STORe FILEname Function Sets queries the name of a file to be saved Syntax INTEgrate STORe FILE INTEgrate STORe FILE lt Filename gt lt Filename gt Up to 8 characters INTEgrate STORe INTErval Function Sets queries the output time interval Syntax INTEgrate STORe INTErval INTEgrate STORe IN lt NRf 1 gt lt NR 2 gt lt NRf1 gt Hour 0 to 1000 lt NRf2 gt Minute 0 to 59 lt NRf8 gt Second 0 to 59 Remarks The valid setting is 1 2 5 10 15 30 seconds or 1 2 5 10 15 30 minutes or 1 hour Erval INTEgrate WH Function Queries all the settings relating to the display digits and unit of electric energy Syntax INTEgrate WH INTEgrate WH DIGIt Function Sets queries the display digits of electric energy Syntax INTEgrate WH DIGIt INTEgrate WH DIGIt lt NRf gt lt NRf gt 0 Standard 1 000 000 2 0000 00 3 00000 0 4 000000 INTEgrate WH UNIT Function Sets queries the display unit of electric energy App 2 16 Syntax INTEgrate WH UNIT INTEgrate WH UNIT lt NRf gt lt NRf gt 0 Wh 1 kWh
141. on the wiring method set For example the sequence when the single phase two wire method is chosen is shown below Even for the unseen data items the respective calculations are performed internally Sequence of Display Contents Switching for Single phase Two Wires Measurement Screen Using UP DOWN LEFT RIGHT keys Upper Rms voltage _ILILILi A j Lower Rms current 6 or D V or g CAST lt Upper Active power AS ER l h h uy Var 4 Lower Reactive power FILII PF Upper Power factor d ti wu lu lt Lower Frequency AD val Measurement Screen Upper Electric energy Lower Elapsed time of integration 9 10 IM CW120 E 9 3 Switching Display Contents Differences in Display Contents Depending on Wiring Method Each time one of the O Y J D keys is pressed the display contents change sequentially as follows Displayed Item Phase Wires send Screen Screen Screen Screen Screen Screen osition 1 2 3 4 5 6 Upper row Vi Wi PF Wh Single phase two wires 1 2W p HE A1 Var Se TIME Single phase three wires 1 3W Upper row V1 Al W PF Wh Three phase three wires 323W Lower row V2 A2 Var Hz TIME Upper row Iw A2 wJ PF J Wh Three phase four wires 384W Eeer V2 Al A3 Var Hz TIME Name Unit Appearing Next to Each Value V1 V2
142. one response message unit to some queries however The first query is always answered with the first response message unit However the nth query does not always agree with the nth response message unit To be certain that the given response message unit corresponds to the correct query place one query in each program message Precautions when Exchanging Messages You can send the next message at any time if the previously sent message did not contain any queries Ifthe previous program message contained a query you cannot send the next message until the entire response message is received If you send the next program message before any response message is received or after only part of a message is received an error will occur The response message that was not received at all or completely will be discarded If the personal computer tries to receive a response message when there is none an error will occur An error also occurs if the personal computer tries to receive a response message before it finishes sending the program message If a program message contains multiple units and some of the units are incomplete the CW120 will pick up the incomplete units and attempt to execute them These attempts may not always be successful however In addition even if the program message contained queries they may not always be responded to Deadlock The CW120 has receive and send buffers for storing program and respo
143. oup Status Integration in Integration Wiring Check Setting Command Progress Stopped MEASure INTEGrate v v v v inteGrate Il O ITEM v v v v ITEM v v Ec sane mag p pm ALL v v CLEAr v v VALUe v v SY Effective Blank Ineffective 5 STATus Group Status Integration in Integration Wiring Check Setting Command Progress Stopped STATus v WA v v STATus oY v v v ERRor wi wi wi v OMESsage v v oY oY v v v OMESsage 6 MEMOry Group Integration in Integration wi Effective Blank Ineffective A iri heck Setti Command Progress Stopped Wiring Check Setting MEMOry DATA w Effective Blank Ineffective IM CW120 E App 2 27 E spuewwoy uoneoiunululo2 Appendix 2 Communication Commands 7 CARD Group Status Integration in Integration Wiring Check Setting Command Progress Stopped CARD v v v v DELEte v DIREctory v FlLEname v WA WA v FILEname oY FORMat v PICKout v v oY v PICKout END v v v v END v SEND v STAR v v v v STARt v SEND SY SETT v STATe v v v v TYPE v v v v TYPE w Effective Blank Ineffective 8 Common Command Group Status Integration in Integration Wiring Check Setting Command Progress Stopped CLS Z
144. p memory to the PC card with the same file name The MEM mark will disappear indicating that the copy has finished and data in the backup memory has been cleared 6 Press the key to return to the measurement screen Screen for Copying Data Screen for Copying Data MEAS SET key UP DOWN LEFT RIGHT keys ONE V ENTER key SEE ALSO Section 7 2 5 Copying and Clearing Backup Memory Contents A NOTE If a file having the same file name resides in the PC card the data is copied added to the bottom of that file 9 16 IM CW120 E 9 5 Backup Memory If Data Is Not Needed Follow the procedure below to clear the data in the backup memory 1 2 3 4 5 6 Press the key to call the setting item selection screen Using the O J J D keys select MEM make the MAM mark appear Press the key Toi then flashes on the screen Using the O V7 D keys change af to dEL Press the key The data is then cleared from the backup memory Press the key to return to the measurement screen YH WH Screen for Clearing Data MEAS SET key UP DOWN LEFT RIGHT keys GD ee ENTER key SEE ALSO Section 7 2 5 Copying and Clearing Backup Memory Contents A NOTE Starting the next integration will also clear the data in the backup memory IM CW120 E 9 17 juswainseayy D4ou3 91179913 n 9 6 External Control Inpu
145. push in the rectangular dip beneath each terminal hole and insert a peeled signal wire Releasing the screwdriver grips the wire START STOP 5 5V MAX edic 74 H IN OUT a Flatblade screwdriver or the like A NOTE e Do not apply a voltage exceeding the allowable voltage range 0 5 to 5 5 V to the control signal input terminal The input circuit may be damaged Do not confuse the input terminal with the output terminal Applicable Wires for Signal Wiring Recommended wires Solid AWG 18 wires 1 0 mm diameter or stranded 0 75 mm wires Usable wires Solid AWG 26 to AWG 18 0 4 to 1 0 mm diameter wires Stranded AWG 22 to AWG 20 0 3 to 0 75 mm diameter wires with each strand thicker than 0 18 mm diameter Standard peeling length 10 mm 9 20 IM CW120 E Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com 9 7 Meter Actions upon Power Failure and Recovery The following describes the meter actions upon power failure and restoration concerning data saving None of the following actions upon power failure and restoration takes place when a power failure has occurred during instantaneous measurement After Power Failure Occurred during Integration Standby State Ifthe power is restored before the preset integration start time P F ILE is displayed and the meter enters the integration standby s
146. put data from the computer 3 RTS Request To Send Output handshaking signal to the computer used when receiving data from the computer 4 TXD Transmit tx Data Output data to the computer 5 7 Unused 8 GND Signal Ground Signal ground Directions of Individual Signals The figure below shows the directions of the individual signals used in the RS 232 interface RTS Request To Send CTS Clear To Send Computer Cw120 121 TXD Transmit Data RXD Receive Data Correspondences of Signal Abbreviations between RS 232 Standard CCITT Standard and JIS Japanese Industrial Standard Signal Names and Pin Assignment Pin No Abbreviations i in 9 Pins CCITT emm 102 Signal Ground 103 Transmit Data 104 Receive Data 105 Request To Send 106 Clear To Send IM CW120 E 11 1 RS 232 Allowable Combinations of Handshaking Methods To assure data exchange via the RS 232 interface with a computer both devices must follow a predetermined procedure may be decided between both parties by sending receiving a series of electric signals This series of exchanged signals is called a handshake The handshake to be used may vary depending on the computer connected but must match the handshake performed by the computer The following types of handshakes are possible with the CW120 121 Possible Combinations of Handshaking Methods Transmission
147. put data items Energy Measure mode data item Sets queries whether Electric Energy Measure mode communication output data items are set to ON or OFF Sets all effective Electric Energy Measure mode communication output data to ON Sets all effective Electric Energy Measure mode communication output data to OFF Queries the measurement data item set with a command that follows the MEASure INTEgrate ITEM query Queries all the settings relating to the status of the communication function Queries the error code and message head of the error queue Queries whether or not to add to the message contents to the STATus ERRor response Queries all the settings relating to the internal memory Queries the number of data backed up in the internal memory Transfers data backed up in the internal memory Queries all the settings relating to the PC card Deletes the file that was specified using the CARD FILEname and CARD TYPE commands Queries all the file names that have been set using the CARD TYPE command Sets queries the names of all files that reside in the PC card Formats the PC card Queries all the settings relating to transfer of a specified range of file contents Sets queries the transfer end point Transfers the specified range of the contents of the file that was specified using the CARD FlLEname and CARD TYPE commands App 2 10 IM CW120 E Appendix 2 Communication Commands Command Description CARD P
148. queue can be read using the STATus ERRor query As with the output queue messages in the error queue are read out on a first in first out basis If the error queue overflows the last message is replaced with message 350 Queue overflow The error queue is emptied in either of the following cases in addition to a case when it is entirely read out The CLS command is received The power is turned on again 1 7 Detailed Description of Communication Commands 1 7 1 COMMunicate Group The commands in the COMMunicate group are used to set or query communication parameters COMMunicate Function Queries all the communication settings Syntax COMMunicate Example COMMUNICATE COMMUNICATE HEADER 1 VERBOSE 1 STATUS 0 COMMunicate HEADer Function Sets queries whether or not the header is returned in response to a query Syntax CO lt Boolean gt unicate HEADer COMMunicate HEADer Example COMMUNICATE HEADER ON COMMUNICATE HEADER gt COMMUNICATE HEADER 1 COMMunicate STATus Function Queries the status specific to the line Syntax CoMMunicate STATus Example COMMUNICATE STATUS COMMUNICATE STATUS 0 Description The status bits have the following meanings Bit 0 Parity error Bit 1 Framing error Bit 2 BREAK character detected Bit 3 and later Always 0 If one of the caus
149. ration occurred are output as power failure restoration information in the following format before new data values are output CW12x File Type 0 MeasureMode 1 OUTPUT DATE OUTPUT TIME data title Wh lt Title of measured data items data field titles yyyy mm dd hh mmiss measured value x xxxxxE xx lt Data values before power failure POWER OFF yyyy mm dd hh mm ss lt Power failure information POWER ON yyyy mm dd hh mm ss lt Power restoration information yyyy mm dd hh mm ss measured value x xxxxxE xx lt New data values after restoration App 3 4 IM CW120 E Appendix 3 File Structures and Data Items Printed 2 2 Print Format A single item is printed per line Each numeric value is printed in significant digits yyyy mm dd hh mm ss Printing date Integration start time Integration start time yyyy mm dd hh mm ss Elapsed time hhhhh mm ss Elapsed time of integration 2 2 1 Print Item Titles and Data Formats Depending on Wiring Method No Title Data Format Output Availability xs 193W Scd 323W 1 yyyy mm dd hh mm ss Output date and time 2 Integration start time yyyy mm dd hh mm ss Integration start date and time 3 Elapsed time hhhhh mm ss Elapsed time of integration SY 4 Vi 0 000E 00 Voltage 1 V wi 4 5 V2 0 000E 00 Voltage 2 V 6 V3 0 000E 00 Voltage 3 V 7 M
150. ration stop time 7 2 13 Setting VT ratio 7 2 14 Setting CT ratio 5 7 2 15 Selecting probe to be used Data saving 7 2 16 Setting decimal point and unit of electric energy watt hours File MWTHO00 CSV 7 2 2 Loading saving setting File WTHO00 SET Data saving Auto saving 7 2 7 Setting output interval File AWTHO00 CSV Saving settings External control terminals RS 232 Communication interface nc 455 chosen when ordering PC card 7 2 10 Setting whether to save data to PC card PC Printer 7 2 11 Selecting communication device On screen Information Measured Data There are two measurement modes instantaneous measurement and electric energy measurement In the latter mode the power is continuously measured and integrated during the preset start and stop times Instantaneous value measurement Item Unit Displayed Name Rms voltage V V1 V2 V3 differs depending on the wiring method Rms current A A1 A2 A3 differs depending on the wiring method Active power WwW WwW Reactive power Var Var Power factor PF Frequency Hz Hz input frequency of V1 IM CW120 E 1 3 M9IAI9AQ 19npOJd n 1 1 Product Overview Electric energy measurement Item Unit Displayed Name Active electric energy Wh Wh Regenerative electric energy Wh Only saved not displayed Six items of instantaneous value measurement The screen changes sequentially each time
151. reen and then press the key for one second or more This will cause the INTEG J mark to disappear and the LED status indicator to extinguish 9 2 2 Stopping Procedures There are three ways to stop integration Manual stop Pressing the key for one second or more stops integration Use this method to abort integration Automatic stop at the specified time on the specified date When the specified time on the specified date set via the setting screen is reached integration stops The stop date and time settings are effective only when integration has begun automatically at the start date and time set Remote stop by external control signal A signal input from the external control terminals stops integration For details see Section 9 6 External Control Input Output Manual Stop Press the key for one second or more Then the mark disappears from the screen the LED status indicator immediately above the key extinguishes and integration stops Aborting Integration To abort integration before the set stop date and time have been reached also press the key for one second or more INTEG mark lights INTEG mark disappears LED lights LED extinguishes Integration gt SEH PEE LED status indicator E Integration stop date and time set START amp STOP Press for one second or more to abort IM CW120 E 9 7 juswainseayy D4ou3 91179913 n 9 2 Starting and Stopping Integration Automatic
152. returns A NOTE The clamp on current probe selection cannot be changed when the electric energy count or the integration time is not zero Attempting to change the selection causes ce 7 7 to appear on the screen this will disappear and the measurement screen will return when any key is pressed Clear the electric energy count first For details of how to do this see Section 9 2 3 Clearing Electric Energy Count or Section 7 2 4 Clearing Electric Energy Count and Resetting Sys tem in this chapter TIP A maximum of three clamp on current probes may be connected though it varies with the wiring method probes having different ratings cannot be used at the same time Namely the clamp on probes used at the same time must be of the same model IM CW120 E 7 27 sbumes uye x 7 2 Setting Each Item 7 2 16 Setting Decimal Point Position and Unit of Electric Energy DIGIT Description You can set the decimal point position and unit of the electric energy readings Select F d default when using the standard settings Selecting the standard setting lets the CW120 121 power meter determine the decimal point position and unit based on the product of rated power x VT ratio x CT ratio x 1 3 as follows Rated Power x VT Ratio x CT Ratio x 1 3 Decimal Point Position and Unit 1 to 9 999 W 0 00 to 9999 99 Wh 10 to 99 99 W 0 0 to 99999 9 Wh 100 to 999 9 W 0 000 to 999 999 kWh 1
153. rk ruc ILL Fn LILI 1 e Saving to PC card mark File number Display When File Name Is Specified CINTEG Integration mark ruck ILL JEG te FILI IL eo Saving to PC card mark SEE ALSO For details see Section 7 3 Setting Name of Measured data File IM CW120 E 9 13 juswainseayy D4ou3 91179913 n 9 4 Saving Data Example of Saved Measured Data Shown below is an example of a data file saved to a PC card when it is opened from a spreadsheet application that has a CSV file converter The field configuration varies depending on the measurement conditions CW12x File Type 0 Measure 1 Mode OUTPUT OUTPUT INTEG START INTEG START ELAPSED DATE TIME DATE TIME qme V1 H P Q IPFI F Wh Wh 2001 12 01 09 10 00 2001 12 01 09 00 00 0 10 00 2001 12 01 09 20 00 2001 12 01 09 00 00 0 20 00 2001 12 01 09 30 00 2001 12 01 09 00 00 0 30 00 Header measurement conditions CW12x Indicates the model File Type 0 indicates a file containing values of integrated data saved automatically Measure Mode 1 indicates electric energy measurement Fields of each data record OUTPUT DATE Date of output OUTPUT TIME Time of output INTEG START DATE Integration start date INTEG START TIME Integration start time ELAPSED TIME Elapsed time of integration The order of measured value fields below shows a
154. rogram message the CW120 returns ERROR Program Messages to CW120 121 and Response from CW120 121 STX device address gt lt program message checksum ETX CR RS Range of data to calculate checksum lt STX gt lt device address gt lt response message checksum ETX CR Range of data to calculate checksum STX start of text ASCII code 02H 1 byte Device address ASCII codes 000 to 999 3 bytes Program message Uppercase alphabetical and numerical characters Variable Checksum ASCII codes 00 to FF 2 bytes A value calculated by summing up the specified block of data in hexadecimal and encoding the last two digits as ASCII code characters ETX end of text ASCII 03H 1 byte CR terminator ASCII ODH 1 byte App 2 8 IM CW120 E Appendix 2 Communication Commands 1 6 Communication Commands Command Description COMMunicate Group COMMunicat COMMunicat COMMunicat COMMunicat e e HEADer e STATus e VERBose SYSTem Group SYSTem SYSTem BAC SYSTem CLA SYSTem CUR SYSTem CUR SYSTem DATE SYSTem DIS SYSTem KLO SYSTem RES SYSTem SCA SYSTem SCA SYSTem SCA SYSTem TIMF SYSTem VOL SYSTem VOL SYSTem WIR INTEGrate G INTEgrate Egrate Egrate Egrate Egrate Egrate Egrate Egrate Egrate Egrate Egrate Egrate H H H H H H H H H H H H H H H H 8 8 8684 u 8 44 8 Egrate ligh
155. s Current input for 96033 probe 130 Arms for 96030 probe 250 Arms for 96031 probe 625 Arms for 96032 probe 700 Arms 1000 Arms for 5 minutes Input ratings for each range Voltage input 150 300 450 V Current input for 96033 probe 5 10 20 50 A for 96030 probe 20 50 100 200 A for 96031 probe 50 100 200 500 A for 96032 probe 200 500 1000 A SEE ALSO For details see Chapter 14 Specifications N WARNING If using an external voltage transformer VT or current transformer CT make sure the trans former can adequately withstand the voltage being measured Be extremely careful not to allow the secondary stage of the CT to become open circuited while the CT is being electrified Otherwise a high voltage may develop on the secondary stage causing extreme danger The maximum allowable input voltage range of the external control input terminals is 0 5 to 5 5 V Do not apply voltages exceeding this range otherwise the input circuitry may be dam aged When wiring the input terminals ensure that you wire the right terminals Donotuse any probe other than the voltage probes supplied with the CW120 121 or dedicated clamp on current probes Do not use a clamp on probe with any non insulated conductors IM CW120 E 5 1 5 2 Diagrams of Basic Wiring This section explains the methods of basic wiring using illustrations Single phase two wires 12W SOURCE gt LOAD 1 d N N vi CH1
156. settings relating to the end of measurement Stops measurement Sets queries the ending time of measurement Queries all the settings relating to the data output file name and output interval INTEgrate STORe STATe Sets queries whether data output is set to ON or OFF INTEgrate STORe FILEname Sets queries the name of a file to be saved INTEgrate STORe INTErval Sets queries the output interval IM CW120 E App 2 9 E spueulUJO2 uoineoiunuiulo2 Appendix 2 Communication Commands Command Description FA H H TEgrate WH TEgrate WH DIGIt TEgrate WH UNIT MEASure Group MEASure MEASure MEASure MEASure MEASure MEASure STATus G STATus INTEgrate INTEgrate INTEgrate INTEgrate INTEgrate INTEgrate roup STATus ERRor STATus OMESsage MEMOry Group MEMOry MEMOry DATA MEMOry SEND CARD Group CARD CARD DEL CARD DIR CARD FIL CARD FOR CARD PIC CARD PIC CARD PIC Ete Ectory Ename at out out END out SEND EM Electric Queries all the settings relating to the display digits and unit of electric energy Sets queries the display digits of electric energy Sets queries the display unit of electric energy Queries all the settings relating to Electric Energy Measure mode communication output data Queries all the settings relating to Electric Energy Measure mode communication out
157. shooting IM CW120 E 4 5 HOIuO 1ewog Buluin pue Ajddng samog Durnoouuo5 D 4 4 Basic Operation Flow Connect power supply to CW120 121 CW120 121 Startup screens Measurement screen key Chapter 4 Chapter 4 Chapter 4 When no setting is needed Chapter 7 Y key Check wiring for error press 3 sec l START amp sTOP key When skipping wiring check Check result neige Chapter 5 Measurement Chapter 8 Instantaneous value measurement Chapter 9 Electric energy measurement p 4 6 IM CW120 E Chapter 5 Wiring 5 1 Precautions for Wiring the Circuit under Test N WARNING When wiring the CW120 or CW121 or when it is turned off turn off the circuit under test It is highly dangerous to connect or disconnect voltage or clamp on current probes without first turning off the circuit under test Beextremely careful not to connect any voltage mode circuit to the current input terminals or any current mode circuit to the voltage input terminals Miswiring can result in not only dam age to the circuit under test or equipment under test but also injury to personnel Donotapply any input level higher than the following to the voltage or current input terminals the upper limit differs depending on the probe used Maximum allowable input continuous Voltage input 495 Vrm
158. sion Always CSV Command INTEgrate STORe FILEname Filename When the file name is set the set file name is displayed on the power meter s screen called by pressing the key as shown below ree ILL JL EL C E OCT MC A NOTE Once the file name is set it remains the same even though integration is repeatedly performed namely the measured data will be added to the same file Toreset the file name setting reset the system or set the file name to If the file name is not set it will be assigned automatically SEE ALSO For details of communication see Chapter 11 Communication Functions and Chapter 12 Communi cation Commands 7 32 IM CW120 E Chapter 8 Instantaneous Value Measurement 8 1 Measuring Instantaneous Values The CW120 121 power meters have two modes for measurement 1 Instantaneous value measurement Measures the rms voltages and rms current of individual phases and power reactive power power factor and frequency Electric energy measurement In addition to the values in the instantaneous value measurement mode measures the electric energy Measurement is performed continuously and integration is started and stopped by using the keys This section describes instantaneous value measurement Displayed Data Item Unit Displayed Name Rms voltage V Mii V3 9 differs depending on the wiring method Rm rre
159. t Temperature coefficient 0 05 of full scale C in ranges of 5 C to 40 C Maximum allowed current 1000 Arms AC for 5 minutes 700 Arms AC continuous 45 Hz to 66 kHz Output impedance Approximately 100 Q maximum External magnetic field effects 0 5 A equivalent or less at 400 A m 50 60 Hz Conductor position effects 0 596 at 200 to 1000 A 45 Hz to 66 kHz Circuit voltage 600 Vrms AC maximum Withstanding voltage 2 2 kVrms AC for 1 minute core to casing and core to output Measurable conductor 65 mm diameter maximum 65 x 75 mm busbar maximum diameter Operating temperature and 5 to 40 C 35 to 8096 RH no condensation humidity ranges Storage temperature and 20 to 60 C 90 RH or less no condensation humidity ranges Applicable locations Indoors altitude of 2000 m or lower Dimensions W x H x D Approximately 100 x 172 5 x 32 mm Weight Approximately 500 g Output terminals Banana plugs safety terminals Output cable length Approximately 3 meters Standard accessories One User s Manual ring markers 4 colors x 2 each L4007MG Dimensions of 96032 Clamp on Current Probe 100 3 9 Unit mm EX 66 2 6 approx inches 1 0 14 10 IM CW120 E 14 2 Specifications of Clamp on Current Probes 3 96033 Clamp on Current Probe Item Measurement range Output voltage Accuracy Amplitude 960
160. t 1 Existence of input voltages 1 Existence of input currents 2 Frequency detection 2 Clamp directions 3 Voltage phase sequence A NOTE Measurement is not performed during the wiring check The wiring check cannot be carried out during continuous measurement 5 6 IM CW120 E 5 5 Wiring Check Function Check Items and Criteria Voltage Inputs Item Criteria 0 Error Message in lower row 1 Existence of voltage inputs If an input level is 10 or less of the range then an error results Else the frequency detection takes place Error message Po 45 LU CT V 2 Frequency detection e If the frequency of input V1 exceeds the 40 to 70 Hz range then an error results Else the voltage phase sequence check takes place Error message TI Hz 3 Voltage phase sequence For 1 2W or 13W This item is not checked For 303W If V2 leads V1 by more than approximately 80 degrees or less than approximately 40 degrees an error results For 324W only for the CW121 If V2 lags behind V1 by more than approximately 140 degrees or less than approximately 100 degrees an error results Or if V3 leads V1 by more than approximately 140 degrees or less than approximately 100 degrees an error results Else Good is displayed Current Inputs Item qo Criteria Error Message in lower row 1 Existence of input
161. t p Rent Rent RANGe Play CK Et Ling Ling CT Ling VT Tage Tage RANGe Ing roup CLEAr DISPlay DISPlay MODE STARt STARt EXECute STARt METHod STARt TIME STATe STOP STOP EXECute STOP TIME STORe Queries all the communication settings Sets queries whether or not the header is returned in response to a query Queries status specific to the line Sets queries whether the response to a query is returned in full or abbreviated form Queries all the system settings Sets queries whether the LCD backlight is set to ON or OFF Sets queries the type of clamp Queries all the settings relating to the current range Sets queries the current range settings Sets queries the date Queries the type of screen Sets queries the keylock function Resets the system Queries all the settings relating to scaling Sets queries the CT ratio Sets queries the VT ratio Sets queries the time Queries all the settings relating to the voltage range Sets queries the voltage range Sets queries the wiring Queries all the settings relating to electric energy measurement Clears integrated values to zero Queries all the settings relating to measurement screen Sets queries the mode of measurement screen Queries all the settings relating to the start of measurement Starts measurement Sets queries the method for starting measurement Sets queries the starting time of measurement Queries the measurement status Queries all the
162. t Output 9 6 1 Remote Control Input Circuit Integration continuous measurement can be started and stopped remotely The external control input must be a 0 5 V Low High level voltage signal or an open close short circuit contact The external control output is a 0 5 V Low High level voltage signal Only the models with the RS 232 interface have external control input output terminals Input While the external control input signal is at the low level or is closed integration continuous measurement is performed While the external control input signal is at the high level or is open instantaneous value measurement is performed Output While integration continuous measurement is performed the output is at the low level While instantaneous value measurement is performed the output is at the high level The EXT mark is displayed when integration is controlled by the external control signal Terminal Arrangement START STOP 5 5V MAX H L H N 0UT 5 V Output Circuit Example of Input Signal Changes Min 30 sec kg gf e 5 V open 100 Q Start Start Stop Stop Integration in progress continuous measurement 9 18 IM CW120 E 9 6 External Control Input Output Remote integration start stop control takes precedence over manual start stop and automatic start stop at specified times Remote control takes effect even during the i
163. t screen is displayed C 5A 10A 20A 50A 100A 200A 500A 1000A 27 urrent ranges A RANGE key Each press of the key changes the range selection sequentially as follows When the 96030 clamp on probe is selected for use 20A 50A 100A 200A Default 20 A TIP If a change to the range setting is incompatible with the conditions derived from other settings GE E E rr is displayed and the change is ineffective First change other settings such as the current range VT ratio CT ratio and wiring method then change the voltage range The voltage range cannot be changed during continuous measurement The voltage range cannot be changed when the electric energy count is not zero Pressing the key at this time causes r 2 to appear on the screen this will disappear and the measurement screen will return when any key is pressed Clear the electric energy count first For details of how to do this see Section 9 2 3 Clearing Electric Energy Count or Section 7 2 4 Clearing Electric Energy Count and Resetting System in Chapter 7 Making Settings IM CW120 E 6 7 pou Bunim pue sabuey Humas B 6 3 Changing Current Range Setting When the 96033 clamp on probe is selected for use 5A 10A 20A 50A Default 5 A When the 96031 clamp on probe is selected for use 50A 100A 200A 500A Defa
164. t terminals N V1 V2 Current input terminals CH1 CH2 CW121 Supports from single phase two wire to three phase four wire circuits Voltage input terminals N V1 V2 V3 Current input terminals CH1 CH2 CH3 Side Panels PC card eject button PC card eject button External control RS 232 terminals RS 485 screw PC card slot connector PC card slot terminals PC CARD 7 RS 232 START STOP T E m A Ce BE E ae A mm Oo ORR o OAQ ea AC INPUT X UE soso POWERS Al Wer DEZ Power switch Power supply connector Power switch Power supply connector Model with RS 232 interface Model with RS 485 interface RS 232 interface RS 232 connector Used to connect to a PC or printer optional Internal control input IN terminals Used to connect the integration SEE ALSO start stop input signals Internal control output OUT terminals Used to connect the integration start stop output signals For details of external control input output see Section 9 6 External Control Input Output SEE ALSO RS 485 interface RS 485 screw terminals Used to connect a shielded cable and terminator For details of the RS 485 interface see Section 11 2 RS 485 IM CW120 E 2 2 Connecting Input Signals Ring marker Voltage probe red N WARNING Thoroughly read Section 5 1 Precautions for W
165. t using power outside the allowable power supply voltage If neither of the above applies the built in fuse may have blown Users are not authorized to replace a built in fuse by themselves Contact the vendor from which you purchased the instrument 2 The settings are initialized when the power is turned on If any one of the following error codes appears during the self test after a power on the backup battery may have run flat IL Te l LI LL A LE Ir Lr LIF LLL LI Tg LILII Lr mo Z mo LETT ww erro IL Users are not authorized to replace the backup battery by themselves Contact the vendor from which you purchased the instrument The life of the backup battery is about 10 years 3 Measurement values are erroneous May be affected by noise Check the installation environment Check that the measuring probes and the clamps are connected correctly Check that the ambient temperature and humidity are within the allowable ranges 4 No key action is possible Check that the Bo key lock mark is not displayed on the screen Some settings such as ranges can be changed only when the electric energy values and elapsed time of integration are zeros Clear the integrated values 5 Data cannot be saved to the backup memory Turn the power off and back on again In some cases the initial self test may correct the problem A power failure might have occurred when the memory was being a
166. ta that denotes a file name It is expressed in one of the following forms Form Example lt NRf gt lt Character data gt lt Character string data 1 CASE CASE e In the lt NRf gt form a file name is an ASCIII code obtained by rounding an 8 digit value into an integer for example 1 denotes 00000001 A negative value is not allowed however n the character data or character string data form a file name is the first eight characters A response message is always returned in the character string data form IM CW120 E App 2 7 E spuewwoy uoneoiunululo2 Appendix 2 Communication Commands 1 5 Messages on RS 485 Messages In the same way as in RS 232 communication RS 485 communication between a CW120 or CW121 and a personal computer is carried out in blocks of data called messages In RS 485 communication an STX ASCII code 02H the device address the checksum an ETX ASCII code 03H and a CR ASCII code ODH are attached to each program message sent from the personal computer and each message sent from the CW120 or CW121 to the personal computer If a received program message contains a query command a command which requests a response the CW120 or CW121 returns a response message If a received program message does not contain a query command the CW120 or CW121 returns OK or ERROR as a response message Also in response to a syntax error in a p
167. tate Pressing any key returns to the measurement screen and integration will start when the preset date and time is reached If the power is restored after the preset integration start time P F ILE is displayed and the meter starts integration immediately after the power has been restored Pressing any key returns to the measurement screen Power Restoration Display D CIE ILL e If Power Failure Has Occurred during Integration If data saving to the PC card is enabled see Section 7 2 10 the active electric energy regenerative energy elapsed time of integration and date and time of the power failure are saved If a power failure has occurred during the saving action it will be aborted and the data will be invalid This may result in destruction of the file After the power restoration the date and time of the restoration are saved P F ILE is displayed and integration restarts in the same conditions as before the power failure Pressing any key returns to the measurement screen Power Restoration Display D CIE ILL e IM CW120 E 9 21 juswainseayy D4ou3 91179913 n 9 7 Meter Actions upon Power Failure and Recovery Example of Power Failure Restoration Data CW12x File Type 0 Measure Mode 1 OUTPUT DATE OUTPUT TIME INTEG START DATE INTEG START TIME ELAPSED TIME 2001 12 01 09 10 00 2001 12 01 09 00 00 0 10 00 POWER OFF 2001 12 01 09 1
168. the power cord or allow the power cord to come into accidental contact with a heat source Procedure for Connecting 98030 Power Supply Cable Follow the steps below to connect the 98030 power supply cable 1 Make sure the power switch of the CW120 121 is turned off 2 Insertthe plug of the 98030 power supply cable into the power supply jack on the side of the CW120 121 3 Insert the black banana plug of the power supply cable into terminal N of the CW120 121 and red banana plug into terminal V1 4 Connectthe black plug of the voltage probe to the black banana plug and the red plug of the probe to the red banana plug 5 Check that the power to the circuit to be measured is turned off and then connect the voltage probes to the circuit IM CW120 E 4 3 HOIuO 1ewog Buluin pue A jddng samog Durnoouuo5 D 4 3 Startup Screens When you turn on the power to the CW120 or CW121 the screens shown in 1 to 3 below appear sequentially in order 1 All segment On All segments light for approximately 2 seconds then the screen changes to the model and version display CERERI E GR US cz Pun p es ONAN AAAA O NU iver Papata a a Dsg KAKANAN TA EE d ocn GG Gs CAD C7 Ame e NO DATE INTER START STOP DIGIT DEV COM EAR E EE E oM I Emm 2 Mod Model and Version Display Screen Upper Model number Lower Version number While the display is turning on all segments and showing t
169. the program header by a space ASCII code 20H If there are multiple data they are separated by a comma Response Messages As explained earlier response messages are sent by the CW120 to the personal computer The format of a response message is shown below Response message response message response message RMT Response message unit gt A response message is a train of one or more response message units each response message unit corresponds to one response Each response unit is separated by a semicolon LL lt RMT gt RMT is a terminator used to terminate each response message For the CW120 the terminator is a string of CR ASCII code ODH and LF ASCII code OAH characters Format of Response Message Unit The format of a response message unit is shown below lt Response header gt space lt response data gt App 2 2 IM CW120 E Appendix 2 Communication Commands lt Response header gt It is possible to program the CW120 so a response header precedes the response data Response data is separated from the header by a space lt Response data gt Response data contains the contents of the response If there are multiple data they are separated by a comma If a program message contains multiple queries the responses are made in the same order as the queries For most queries the CW120 returns only one response message unit The CW120 returns more than
170. the stop date and time Settings become ineffective You need to stop integration manually in this case too As the stop date and time you cannot set a time earlier than in the past the start date and time 9 8 IM CW120 E 9 2 Starting and Stopping Integration 9 2 3 Clearing Electric Energy Count There are two ways to clear the electric energy count and elapsed time of integration 1 In the measurement mode press the key for three seconds or more 2 In the setting mode choose the setting item for clearing the electric energy count and resetting the system and perform the specified setting actions This section describes the former way For the latter way see Section 7 2 4 Clearing Electric Energy Count and Resetting System Procedure 1 When the measurement screen is displayed press the escape key for three seconds or more Then the GIJA mark appears and lot flashes on the screen Electric Energy Count Clearance Screen ENTER key ESC escape key 2 Press the key The electric energy count is cleared and the measurement screen returns To cancel press the key The measurement screen also returns IM CW120 E 9 9 juswainseayy D4ou3 91179913 n 9 3 Switching Display Contents In the same way as during instantaneous value measurement pressing one of the 0 YV J D keys changes the display contents in order The sequence differs depending
171. tion 9 6 External Control Input Output Manual Start Press the amp key for one second or more Then the mark appears on the screen the LED status indicator immediately above the key lights up and integration starts If data saving to the PC card is enabled see Section 7 2 10 the file number of the file to which the data is to be saved is displayed at the same time After two seconds the file number display disappears and the measurement screen returns IM CW120 E 9 3 juswainseayy D4ou3 91179913 n 9 2 Starting and Stopping Integration Display of File Number for Auto saving INTEG J 4 t Integration mode mark rae O ILL riui LILI 1 i Z Saving to PC card mark File number Upper Rms voltage Lower Rms current C LED status indicator Lights up upon start of integration ee oe BODE M V Automatic Start at Specified Time on Specified Date In this method you set the integration start date and time via the setting screen For the setting procedure see Measurement Procedure in Section 9 1 Measuring Electric Energy and Section 7 2 8 Setting Integration Start Date and Time START amp STOP key f Start Date and Time Are Set to Future Point of Time Later than Current Time Pressing the key flashes the mark on the screen and LED status indicator The file number of the file to which the data is to be sav
172. tiple CW120s and CW121s to be connected on the same line for remote monitoring IM CW120 E 1 1 M9IAI9AQ 19npOJd n 1 1 Product Overview Compact Design The CW120 121 are sufficiently compact to be installed inside a cubicle or power distribution panel during measurement The 96033 current sensing probe with a 5 to 50 A range is designed for use in a narrow space so is useful for measurement inside a power distribution panel with dense wiring Easy to see Display Screen Despite the compact body the large back lit LCD enables easy measurement in a dark place 1 2 IM CW120 E 1 1 Product Overview Schematic Function Diagram Power on Measurement MEAS SET 7 k gt Setting screen ey Chapter 7 screens 7 2 1 Setting device number 7 2 2 Loading saving settings 7 2 3 Deleting file and formatting PC card SART key 7 2 4 Clearing electric energy count watt hours and resetting system 7 2 5 Copying and clearing backup memory Chapter 9 contents Electric energy watt hour 7 26 Setting date 7 2 7 Setting output interval Chapter 8 7 2 8 Setting integration start time 7 2 9 Setting integration stop time Instantaneous value 7 2 10 Setting whether to save data to PC card measurement Start of End of integration integration AT measurement 7 2 11 Selecting communication device 7 2 8 Setting integration start time 7 2 12 Making communication settings 7 2 9 Setting integ
173. to 9 999 kW 0 00 to 9999 99 kWh 10to 99 99 kW 0 000 to 999 999 kWh 100 to 999 9 kW 0 00 to 9999 99 MWh 1 to 9 999 MW 0 0 to 99999 9 MWh 10 to 99 99 MW 0 000 to 999 999 MWh 100 to 999 9 MW 0 00 to 9999 99 GWh 1 to 9 999 GW 0 00 to 9999 99 GWh 10 to 99 99 GW 0 0 to 99999 9 GWh 100 to 9999 GW 0 to 999999 GWh When specifying the desired decimal point position and unit select Decimal position setting from 000 000 0000 00 00000 0 and 000000 Unit from Wh kWh MWh and GWh Procedure 1 Using the A Y X D keys make the DIGIT mark and its current settings appear on the screen Then press the key Ska or the number representing the currently set decimal point position flashes 7 28 IM CW120 E 7 2 Setting Each Item When Setting Neither Decimal Point Position Nor Unit Specifically When Using Standard Settings Representing standard MEAS SET key UP DOWN LEFT RIGHT keys I KA OIS V ESC key ENTER key 1 Using the A Y J D keys select Std 2 Then press the key The settings are changed accordingly and the setting item selection screen returns To cancel the change press the key The setting item selection screen also returns IM CW120 E 7 29 sbumes Huye x 7 2 Setting Each Item When Setting Decimal Point Position Specifically Setting Decimal Point Position Move the decimal point using the UP DOWN LEFT RIGHT keys M
174. ult 50 A When the 96032 clamp on probe is selected for use 200A 500A 1000A Default 200 A Selecting Clamp on Current Probe to Be Used The current ranges that can be selected vary with the clamp on current probe used The probe selection can be changed from a setting screen Clamp on Current Probe Models and Ratings Clamp on Current Probe Model Setting Rating Ranges 96033 50A 5 10 20 50 A 96030 200A 20 50 100 200 A 96031 500A 50 100 200 500 A 96032 1000A 200 500 1000 A Default 200 A Procedure to Change Probe Selection 1 Press the key when the measurement screen is displayed The screen switches to the setting item selection screen and the sign appears in the lower left of the screen 2 Using the O 7 J D keys make the i mark in the lower right and its current setting appear on the screen Then press the key The number representing the currently selected clamp model flashes 6 8 IM CW120 E 6 3 Changing Current Range Setting MEAS SET key UP DOWN LEFT RIGHT keys ENTER key 3 Using the 0 X7 J D keys select the number corresponding to the desired clamp on current probe ann 9 cana 48 man 2 rn LLILI Tore Si ILILI ta J ILILILI to J ILI vq AD 4 Press the key 5 Press the key to return to the measurement screen The range is changed according to the new probe selected
175. y independent command with no hierarchical structure The format of a simple header is shown below lt mnemonic gt lt mnemonic gt When Concatenating Commands Command Group A group of commands which share the same compound header is called a command group A command group may contain sub groups Example Command group relating to electric energy measurement INTEgrate INTEgrate STARt TIME INTEgrate STOP TIME INTEgrate STORe When Concatenating Commands of the Same Group The CW120 stores information on which hierarchical level the command currently being executed belongs to and performs analysis on the assumption that the next command will also belong to the same level Therefore you may omit the header of the next command if the two commands belong to the same group Example INTEgrate STORe FILE FILEO STARt TIME 1999 1 1 0 0 lt PMT gt When Concatenating Commands of Different Groups Include a colon before the header if the following command does not belong to the same group as the preceding command Example SYSTem CURRent AUTO ON INTEgrate START EXECute lt PMT gt When Concatenating Common Commands Common commands defined in IEEE 488 2 1987 are independent of hierarchy A colon is not necessary before a common command Example INTEgrate STORe FILE FILEO CLS STARt TIME 1999 1 1 0 0 lt PMT gt When Separating Commands with lt PMT gt If a terminator is used to s

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