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ITech IT9120 Series, Руководство по программированию

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Current  Measurement  Commands 

 

Copyright © Itech Electronic Co., Ltd. 

14

 

Chapter3  Current Measurement Commands 

This chapter describes the current relevant commands. 

FETCh? 

This command is used to read all relevant parameters of current, voltage and 
power  measured  by  the  power  meter.  The  order  in  which  the  parameters  are 
read is as follow. 
VOLT_RMS,  VOLT_MN,  VOLT_RMN,  VOLT_DC,  VOLT_AC,  VOLT_MAXPk, 
VOLT_MINPk, VOLT_PPEak, VOLT_CF, FREQ_VOLT, 
CURR_RMS, 

CURR_MN, 

CURR_RMN, 

CURR_DC, 

CURR_AC, 

CURR_MAXPk,  CURR_MINPk,  CURR_PPEak,  CURR_CF,  FREQ_CURR, 
CURR_INR, 
POWER_ACTive,  POWER_REACtive,  POWER_APParent,  POWER_PF, 
POWER_Phase, FREQ_SSOurce 
Please  refer  to  IT9120  User  Manual  for  the  detailed  instructions  of  the 
parameters. 

Command syntax: 

FETCh?

 

Returned value 

<NR2>, <NR2>, ......, <NR2> 

FETCh[:SCALar]:CURRent:AC? 

This command is used to read the latest pre-processing current.It will not affect 
the  device  setting  values  and  will  not trigger  a  new  measurement  operation.It 
only requires to get the latest available value that has been measured. 

Command syntax: 

FETCh[:SCALar]:CURRent:AC? 

Returned value 

<NR2> 

MEASure[:SCALar]:CURRent:AC? 

This command will trigger the measurement operation to get a real-time current. 

Command syntax: 

MEASure[:SCALar]:CURRent:AC? 

Returned value: 

<NR2> 

FETCh[:SCALar]:CURRent:CFACtor? 

This  command  is  used  to  read the  latest  pre-processing  current  crest  factor.It 

Содержание IT9120 Series

Страница 1: ...Power meter IT9120 Series Programming Guide Model IT9121 IT9121H IT9121C IT9121E Version V3 3...

Страница 2: ...overing the materials in this document that conflict with these terms the warranty terms in the separate agreement shall prevail Technology Licenses The hardware and or software described herein are f...

Страница 3: ...duties and other taxes shall be on the account of customer Limitation of Warranty This Warranty will be rendered invalid if the product is Damaged resulting from customer wired circuits or customer s...

Страница 4: ...terminal Do not use the instrument if the detachable cover is removed or loosen Do not connect the instrument to any cable or terminal block before self testing To prevent the possibility of accident...

Страница 5: ...normal use The expected useful life of the product is 10 years The product can be used safely during the 10 year Environment Friendly Use Period EFUP Upon expiration of the EFUP the product must be i...

Страница 6: ...1000 4 2 2008 EN 61000 4 2 2009 IEC 61000 4 3 2006 A1 2007 A2 2010 EN 61000 4 3 2006 A1 2008 A2 2010 IEC 61000 4 4 2004 A1 2010 EN 61000 4 4 2004 A1 2010 IEC 61000 4 5 2005 EN 61000 4 5 2006 IEC 61000...

Страница 7: ...tion EVENt 11 STATus OPERation CONDition 11 STATus OPERation ENABle 11 STATus OPERation NTRansition 12 STATus OPERation PTRansition 12 Chapter3 Current Measurement Commands 14 FETCh 14 FETCh SCALar CU...

Страница 8: ...uency Measurement Commands 28 FETCh SCALar FREQuency VOLTage 28 MEASure SCALar FREQuency VOLTage 28 FETCh SCALar FREQuency CURRent 28 MEASure SCALar FREQuency CURRent 28 FETCh SCALar FREQuency SSOurce...

Страница 9: ...CTive THDistort 40 FETCh SCALar HARMonics POWer APParent 40 MEASure SCALar HARMonics POWer APParent 40 FETCh SCALar HARMonics POWer REACtive 41 MEASure SCALar HARMonics POWer REACtive 41 FETCh SCALar...

Страница 10: ...arge BOUGht 60 INPut INRush STATe OFF ON 60 INPut INRush TRIGger CURRent LEVel n 60 INPut INRush DELay TIME n 61 INPut INRush MEASure TIME n 61 Chapter13 CALCulate Commands 62 CALCulate INTegral STATe...

Страница 11: ...CALibrate SECure STATe 71 CALibrate INITial 71 CALibrate SAVe 72 CALibrate CURRent POINt 72 CALibrate CURRent EXTernal POINt point 73 CALibrate CURRent EXTernal LEVel NRf 73 CALibrate VOLTage POINt 7...

Страница 12: ...r part command tree Multiple commands in a message Several SCPI commands can be merged and sent as a single message with one information terminator Two aspects shall be considered when sending several...

Страница 13: ...age unit and separate it by a semicolon separator of message unit Common commands will not influence the head path you can insert them into any place of the message VOLTage TRIGgered 17 5 INITialize T...

Страница 14: ...example the parameter in the angle bracket is frequency in the above syntax statements Angle brackets are not sent along with command strings You must assign a value such as FREQ CENT 1000 to the par...

Страница 15: ...ngs sent to the instrument must end with a Newline NL character IEEE 488 EOI End or Identify information can be used as NL character to replace termination command string of NL character It is accepta...

Страница 16: ...ASCII character sets Character strings must start and end with paired quotation marks and single quotation marks or double quotation marks are both allowed Quotation mark separators may also act as on...

Страница 17: ...ay be incorrect The interface cable must be connected to the correct serial port on your computer COM1 COM2 etc Communication setting Before communication operation please make sure that the following...

Страница 18: ...equipment Internet or enterprise Intranet IP address refers to four 32 bit values within 0 255 which are separated by decimal points such as 192 168 111 24 Please ask the network administrator to pro...

Страница 19: ...Always set to 0 2 QYE Query Error Set to 1 if the output queue is empty or if the data is missing even after a query has been sent 3 DDE Device Error Set to 1 when execution of the command is not poss...

Страница 20: ...ENABle STATus QUEStionable CONDition This command is used to read the value of query condition register to get the power meter s status such as OCPeak OCRMS OV OP OT Query syntax STATus QUEStionable...

Страница 21: ...1 to 0 transition of the corresponding bit of the Questionable Condition register causes that bit in the Questionable Event register to be set Command syntax STATus QUEStionable NTRansition NR1 Parame...

Страница 22: ...and STATus OPERation ENABle The bit configuration of the Operation status registers is as follows Bit 2 Ranging Bit 3 ITG Integrate Busy Bit 4 ITM Integrate Timer Busy Bit 5 Waiting for trigger STATus...

Страница 23: ...ation event register which will cause the operation summary bit OPER of the status register to be 1 Command syntax STATus OPERation NTRansition NR1 Parameters 0 65535 Example STATus OPERation NTRansit...

Страница 24: ...Status Register Commands Copyright Itech Electronic Co Ltd 13 Example STATus OPERation PTRansition 128...

Страница 25: ...PParent POWER_PF POWER_Phase FREQ_SSOurce Please refer to IT9120 User Manual for the detailed instructions of the parameters Command syntax FETCh Returned value NR2 NR2 NR2 FETCh SCALar CURRent AC Thi...

Страница 26: ...d is used to read the latest pre processing average current It will not affect the device setting values and will not trigger a new measurement operation It only requires to get the latest available v...

Страница 27: ...will not trigger a new measurement operation It only requires to get the latest available value that has been measured Command Syntax FETCh SCALar CURRent RMN Returned value NR2 MEASure SCALar CURRent...

Страница 28: ...will not trigger a new measurement operation It only requires to get the latest available value that has been measured Command Syntax FETCh SCALar CURRent INRush Returned value NR2 MEASure SCALar CUR...

Страница 29: ...operation It only requires to get the latest available value that has been measured Command Syntax FETCh SCALar CURRent MINPk Returned value NR2 MEASure SCALar CURRent MINPk This command will trigger...

Страница 30: ...mands Copyright Itech Electronic Co Ltd 19 MEASure SCALar CURRent PPEak This command will trigger the measurement operation to get a real time peak peak current Command Syntax MEASure SCALar CURRent P...

Страница 31: ...C This command will trigger the measurement operation to get a real time AC voltage Command Syntax MEASure SCALar VOLTage AC Returned value NR2 FETCh SCALar VOLTage DC This command is used to read the...

Страница 32: ...CALar VOLTage RMS Returned value NR2 FETCh SCALar VOLTage RMN This command is used to read the latest pre processing voltage rectified mean value It will not affect the device setting values and will...

Страница 33: ...t pre processing voltage crest factor It will not affect the device setting values and will not trigger a new measurement operation It only requires to get the latest available value that has been mea...

Страница 34: ...not trigger a new measurement operation It only requires to get the latest available value that has been measured Command Syntax FETCh SCALar VOLTage MINPk Returned value NR2 MEASure SCALar VOLTage MI...

Страница 35: ...right Itech Electronic Co Ltd 24 Returned value NR2 MEASure SCALar VOLTage PPEak This command will trigger the measurement operation to get a real time peak peak voltage Command Syntax MEASure SCALar...

Страница 36: ...is command will trigger the measurement operation to get a real time active power Command Syntax MEASure SCALar POWer ACTive Returned value NR2 FETCh SCALar POWer APParent This command is used to read...

Страница 37: ...ASure SCALar POWer REACtive Returned value NR2 FETCh SCALar POWer PFACtor This command is used to read the latest pre processing power factor It will not affect the device setting values and will not...

Страница 38: ...to get the latest available value that has been measured Command Syntax FETCh SCALar POWer PHASe Returned value NR2 MEASure SCALar POWer PHASe This command will trigger the measurement operation to g...

Страница 39: ...VOLTage This command will trigger the measurement operation to get a real time voltage frequency Command Syntax MEASure SCALar FREQuency VOLTage Returned value NR2 FETCh SCALar FREQuency CURRent This...

Страница 40: ...ect the device setting values and will not trigger a new measurement operation It only requires to get the latest available value that has been measured Command Syntax FETCh SCALar FREQuency SSOurce R...

Страница 41: ...surement operation to get a real time sum of positive watt hour and negative watt hour Command Syntax MEASure SCALar ENERgy ACTive SUM Returned value NR2 FETCh SCALar ENERgy ACTive POSitive This comma...

Страница 42: ...al time negative watt hour Command Syntax MEASure SCALar ENERgy ACTive NEGative Returned value NR2 FETCh SCALar ENERgy CHARge SUM This command is used to read the latest pre processing sum of positive...

Страница 43: ...ge POSitive Returned value NR2 FETCh SCALar ENERgy CHARge NEGative This command is used to read the latest pre processing negative ampere hour It will not affect the device setting values and will not...

Страница 44: ...2 FETCh SCALar ENERgy ACTive AVERage This command is used to read the latest pre processing active power integral value It will not affect the device setting values and will not trigger a new measurem...

Страница 45: ...onics CURRent AMPLitude Parameters FUNDamental TOTal ALL NR1 Returned value NRf MEASure SCALar HARMonics CURRent AMPLitude This command will trigger the measurement operation to get a real time curren...

Страница 46: ...t only requires to get the latest available value that has been measured Command Syntax FETCh SCALar HARMonics CURRent THARmonic Returned value NR2 MEASure SCALar HARMonics CURRent THARmonic This comm...

Страница 47: ...It only requires to get the latest available value that has been measured Command Syntax FETCh SCALar HARMonics VOLTage AMPLitude Parameters FUNDamental TOTal ALL NR1 Returned value NRf MEASure SCALa...

Страница 48: ...values and will not trigger a new measurement operation It only requires to get the latest available value that has been measured Command Syntax FETCh SCALar HARMonics VOLTage THARmonic Returned value...

Страница 49: ...it ude This command is used to read the latest pre processing power harmonics It will not affect the device setting values and will not trigger a new measurement operation It only requires to get the...

Страница 50: ...he measurement operation to get a real time power fundamental harmonic Command Syntax MEAS SCALar HARMonics POWer ACTive FUNDamental Returned value NR2 FETCh SCALar HARMonics POWer ACTive THARm onic T...

Страница 51: ...Di stort This command will trigger the measurement operation to get a real time total harmonic distortion factor of power Command Syntax MEASure SCALar HARMonics POWer ACTive THDistort Returned value...

Страница 52: ...nd Syntax FETCh SCALar HARMonics POWer REACtive Parameters NR1 0 50 Returned value NRf MEASure SCALar HARMonics POWer REACtive This command will trigger the measurement operation to get a real time re...

Страница 53: ...cessing phase difference of K order harmonic voltage Uk and fundamental wave U1 It will not affect the device setting values and will not trigger a new measurement operation It only requires to get th...

Страница 54: ...et a real time phase difference of K order harmonic voltage Uk and harmonic current Command Syntax MEASure SCALar HARMonics POWer PHASe UI Parameters NR1 0 50 Returned value NRf FETCh SCALar HARMonics...

Страница 55: ...Harmonic Measurement Commands Copyright Itech Electronic Co Ltd 44 Command Syntax MEASure SCALar HARMonics POWer PHASe II Parameters NR1 0 50 Returned value NRf...

Страница 56: ...SENSe AVERage TCONtrol name This command is used to set the linear averaging type Command Syntax AVERage TCONtrol name Parameters REPeat MOVing Query Syntax AVERage TCONtrol SENSe AVERage TYPE boolea...

Страница 57: ...age auto range function Command Syntax VOLTage RANGe AUTO bool Parameters 0 1 OFF ON Query Syntax VOLTage RANGe AUTO SENSe CURRent RANGe NRf This command is used to set the current range Command Synta...

Страница 58: ...30V 75V 150V 300V Auto IT9121E CF 3 15V 30V 60V 150V 300V 600V Auto CF 6 7 5V 15V 30V 75V 150V 300V Auto IT9121H CF 3 15V 30V 60V 150V 300V 600V 1000V CF 1 5 Auto CF 6 7 5V 15V 30V 75V 150V 300V 500V...

Страница 59: ...ratio of the external current sensor 2 Command Syntax CURRent SRATio EXS2 NRf Parameters 0 001 9999 999 Query Syntax CURRent SRATio EXS2 SENSe CURRent EXS RANGe This command is used to set the curren...

Страница 60: ...Commands Copyright Itech Electronic Co Ltd 49 CF 6 1 25V 2 5V 5V 25mV 50mV 100mV 250mV 0 5V 1V IT9121C CF 3 5V 10V 100mV 250mV 500mV 1V 2 5V CF 6 2 5V 5V 50mV 125mV 250mV 0 5V 1 25V Query Syntax CURR...

Страница 61: ...state This command is used to enable or disable the state of continous measurement period In off mode that means to enable a single measurement Command Syntax INITiate CONTinuous state Parameters ON...

Страница 62: ...trigger signal EXTernal External clock trigger mode VOLTage Set input voltage source as a trigger signal CURRent Set input current source as a trigger signal Command Syntax TRIGger SOURce state Parame...

Страница 63: ...r VOLTage LEVel level Parameters level Query Syntax TRIGger VOLTage LEVel TRIGger CURRent LEVel level This command is used to set the current trigger level when Current selected as trigger source mode...

Страница 64: ...mand is used to set trigger slope when takes waveform as trigger source Command Syntax WAVE TRIG SLOP POSitive NEGative ANY Parameters POSitive NEGative ANY Query Syntax WAVE TRIG SLOP WAVE TRIG MODE...

Страница 65: ...set the time grid value of the waveform display Avaiable setting 0 0005 0 001 0 002 0 005 0 01 0 02 0 05 0 1 0 2 0 5 Command Syntax WAVE TRIG DIVTime UNIT S n Parameters n Unit S Query Syntax WAVE TRI...

Страница 66: ...ATA NORMalization This command is used to obtain the voltage datas after normalization Command Syntax WAVE VOLTage DATA Parameters n Query Syntax WAVE VOLTage DATA WAVE CURRent DATA NORMalization This...

Страница 67: ...Oscilloscope Commands Copyright Itech Electronic Co Ltd 56 Command Syntax WAVE TRIGger STATe Returned value Auto Auto Trig Trig Stop Query Syntax WAVE TRIGger STATe...

Страница 68: ...ource which is used for determining the fundamental wave cycle as the reference for analysis of harmonic orders Command Syntax HARMonic PLLSource OFF U I Parameters OFF U I Query Syntax HARMonic PLLSo...

Страница 69: ...t the synchronous source type Command Syntax SSOurce OFF U I Parameters OFF U I Query Syntax SSOurce INPut CFACtor NRI This command is used to set the crest factor Command Syntax CFACtor NRI Parameter...

Страница 70: ...ata updating rate Command Syntax RATE NRI Parameters 0 1s 0 25s 0 5s 1s 2s 5s Query Syntax RATE INPut INTegral ACAL bool This command is used to enable or disable the auto calculation function of inte...

Страница 71: ...ge SOLD DISCharge BOUGht Query Syntax INTegrate WPTYpe INPut INRush STATe OFF ON This command is used to enable or disable the inrush current measurement function Command Syntax INPut INRush STATe OFF...

Страница 72: ...rrent measurement Max time is 0 0002s Command Syntax INPut INRush DELay TIME n Parameters n Unit S Query Syntax INRush DELay TIME INPut INRush MEASure TIME n This command is used to set the inrush cur...

Страница 73: ...ax CALCulate INTegral CLEar Parameters None Query Syntax None CALCulate INTegral CLEar AUTO ON OFF This command is used to enable or disable the automatic zero clearing function Command Syntax INTegra...

Страница 74: ...Parameters None Query Syntax None CALCulate INTegral STARt DATE yy MM dd CALCulate INTegral STARt TIME hh mm ss This command is used to set the start date when time reached device start integral opera...

Страница 75: ...STOP DATE yy MM dd CALCulate INTegral STOP TIME hh mm ss This command is used to set the stop date when time reached device stops integral operation Command Syntax INTegral STOP DATE yy MM dd INTegral...

Страница 76: ...CALCulate METer MAXHold STATe bool This command is used to set the hold mode of maximum value Command Syntax CALCulate METer MAXHold bool Parameters 0 1 OFF ON Query Syntax CALCulate METer MAXHold CA...

Страница 77: ...STATe bool This command is used to enable or disable the oscilloscope function Command Syntax CALCulate SCOPe bool Parameters 0 1 OFF ON Query Syntax CALCulate SCOPe CALCulate HOLD STATe bool This co...

Страница 78: ...one Query Syntax None SYSTem BEEPer STATe bool This command is used to turn on or turn off the beeper Command Syntax SYSTem BEEPer bool Parameters 0 1 OFF ON Query Syntax SYSTem BEEPer STATe SYSTem DA...

Страница 79: ...Syntax SYSTem KEY Parameters None SYSTem ERRor This command is used to query the error information Command Syntax SYSTem ERRor Parameters None SYSTem LANGuage NRi This command is use to set the system...

Страница 80: ...This command is used to clear the error information Command Syntax SYSTem CLEar Parameters None Returned value None SYSTem RWLock This command is used to set power meter to remote control mode via RS2...

Страница 81: ...System Commands Copyright Itech Electronic Co Ltd 70 Command Syntax SYST VERS Parameters None Returned value NR2 Example 1991 0...

Страница 82: ...n mode is being enabled and the existing password is not 0 If the password is not entered or is incorrect an error is generated and the calibration mode remains disabled The query statement returns on...

Страница 83: ...is command can only be used in calibration mode It saves any new calibration constants after a current or voltage calibration procedure has been completed in nonvolatile memory Command Syntax CALibrat...

Страница 84: ...and CAL STAT CAL SAV CALibrate CURRent EXTernal POINt point This command is used to calibrate external current points Command Syntax CALibrate CURRent EXTernal POINt point Parameters point CALibrate C...

Страница 85: ...age value that you obtain by reading an external meter You must first select a calibration level with CALibrate VOLTage POINt for the value being entered These constants are not stored in nonvolatile...

Страница 86: ...nd is used to edit the value of standard event enable register It defines the specified bits from standard event register that will cause the value of ESB bit in status byte register to be 1 Command S...

Страница 87: ...ommand is used to query related information of power meter Query Syntax IDN Parameters None Returned value AARD Example ITECH IT9121 KN34243232 01 00 OPC After all other commands executed before OPC c...

Страница 88: ...mmand power meter will return back a decimal value which is a binary weighted sum of all bits from the enable register Command Syntax SRE NRf Parameters 0 255 Power on value Refer to PSC command Examp...

Страница 89: ...I This command instructs the power meter not to process any further commands until all pending operations are completed Pending operations are as defined under the OPC command WAI can be aborted only...

Страница 90: ...Thank you for purchasing ITECH products If you have any doubt about this product please contact us as follow 1 Visit ITECH website www itechate com 2 Select the most convenient contact for further co...

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