iTech IT9121, IT9121H, IT9121C, IT9121E User Manual

Power meter

IT9120 Series Programming Guide

Model: IT9121/IT9121H/IT9121C/IT9121E

Version: V3.3

Notices

No part of this manual may be reproduced in any form or by any means (including electronic storage and retrieval or translation into a foreign language) without prior permission and written consent from Itech Electronic, Co., Ltd. as governed by international copyright laws.

Manual Part Number

IT9120-402146

Revision

Edition: May 11, 2020

Itech Electronic, Co., Ltd.

Trademarks

Pentium is U.S. registered trademarks

of Intel Corporation.

Microsoft, Visual Studio, Windows and MS Windows are registered trademarks of Microsoft Corporation in the United States and/or other countries and regions.

Warranty

The materials contained in this

document are provided “as is”, and

is subject to change, without prior notice, in future editions. Further, to the maximum extent permitted by applicable laws, ITECH disclaims all warrants, either express or implied, with regard to this manual and any information contained herein, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. ITECH shall not be held liable for errors or for incidental or indirect damages in connection with the furnishing, use or application of this document or of any information contained herein. Should ITECh and the user enter into a separate written agreement with warranty terms covering the materials in this document that conflict with these terms, the warranty terms in the separate agreement shall prevail.

Technology Licenses

The hardware and/or software described herein are furnished under a license and may be used or copied only in accordance with the terms of such license.

Restricted Rights Legend

U.S. Government Restricted Rights. Software and technical data rights granted to the federal government include only those rights customarily provided to end user customers. ITECH

provides this customary commercial license in software and technical data pursuant to FAR 12.211 (Technical Data) and 12.212 (Computer Software) and DFARS

252.227-7015 (Technical Data – Commercial Items) and DFARS

227.7202-3 (Rights in Commercial Computer Software or Computer Software Documentation).

Safety Notices

A CAUTION sign denotes a hazard. It calls attention to an operating procedure or practice that, if not correctly performed or adhered to, could result in damage to the product or loss of important data. Do not proceed beyond a CAUTION sign until the indicated conditions are fully understood and met.

A WARNING sign denotes a hazard. It calls attention to an operating procedure or practice that, if not correctly performed or adhered to, could result in personal injury or death. Do not proceed beyond a WARNING sign until the indicated conditions are fully understood and met.

NOTE A NOTE sign denotes important hint. It calls attention to tips or supplementary information that is essential for users to refer to.

IT9120 series Programming Guide

Quality Certification and Assurance

We certify that IT9120 series power meter meets all the published specifications.

Warranty

ITECH warrants that the product will be free from defects in material and workmanship under normal use for a period of one (1) year from the date of delivery (except those described in the Limitation of Warranty below). For warranty service or repair, the product must be returned to a service center designated by ITECH.

 The product returned to ITECH for warranty service must be shipped PREPAID.

And ITECH will pay for return of the product to customer.

 If the product is returned to ITECH for warranty service from overseas, all the

freights, duties and other taxes shall be on the account of customer.

Limitation of Warranty

This Warranty will be rendered invalid if the product is:  Damaged resulting from customer-wired circuits or customer-supplied parts or

accessories.

 Modified or repaired by customer without authorization.  Damaged resulting from customer-wired circuits or use in an environment not

designated by us;

 The product model or serial number is altered, deleted, removed or made

illegible by customer;

 Damaged as a result of accidents, including but not limited to lightning,

moisture, fire, improper use or negligence.

Safety Symbols

Direct current

ON (power)

Alternating current

OFF (power)

Both direct and alternating current

Power-on state

Protective earth (ground) terminal

Power-off state

Earth (ground) terminal

Reference terminal

Caution

Positive terminal

Warning (refer to this manual for specific Warning or Caution information)

Negative terminal A chassis terminal

IT9120 series Programming Guide

Safety Precautions

The following safety precautions must be observed during all phases of operation of this instrument. Failure to comply with these precautions or specific warnings elsewhere in this manual will constitute a default under safety standards of design, manufacture and intended use of the instrument. ITECH assumes no liability for the customer’s failure to comply with these precautions.

 Do not use the instrument if it is damaged. Before operation, check the

casing to see whether it cracks or is not applied with sufficient plastics. Do not operate the instrument in the presence of inflammable gasses, vapors or dusts.

 Make sure to use the power cord supplied by ITECH.  Check all marks on the instrument before connecting the instrument to

power supply.

 Turn off the instrument and the operation system before connecting to the

I/O 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 accidental injuries, be sure to use the power

adapter supplied by the manufacturer only.

 Never use the instrument with a life-support system or any other equipment

subject to safety requirements.

 Failure to use the instrument as directed by the manufacturer may render

its protective features void.

 Always clean the casing with a dry cloth. Do not clean the internals.

 Make sure the vent hole is always unblocked.

Environmental Conditions

The instrument is designed for indoor use and an area with low condensation. The table below shows the general environmental requirements for the instrument.

Environmental Conditions

Requirements

Operating temperature

5°C-40°C

Operating humidity

humidity 20%-80% (non-condensation)

Storage temperature

-20°C-50 °C

Altitude

Operating up to 2,000 meters

Installation category

Pollution degree

Pollution degree 2

NOTE

To make accurate measurements, allow the instrument to warm up for 30 min.

IT9120 series Programming Guide

Regulatory Markings

The CE mark indicates that the product complies with all the relevant European legal directives. The specific year (if any) affixed refers to the year when the design was approved.

The instrument complies with the WEEE Directive (2002/96/EC) marking requirement. This affix product label indicates that you must not discard the electrical/electronic product in domestic household waste.

This symbol indicates the time period during which no hazardous or toxic substances are expected to leak or deteriorate during normal use. The expected useful life of the product is 10 years. The product can be used safely during the 10-year Environment Friendly Use Period (EFUP). Upon expiration of the EFUP, the product must be immediately recycled.

Waste Electrical and Electronic Equipment (WEEE) Directive

2002/96/EC Waste Electrical and Electronic Equipment (WEEE) Directive

This product complies with the WEEE Directive (2002/96/EC) marking requirement. This affix product label indicates that you must not discard the electrical/electronic product in domestic household waste.

Product Category With reference to the equipment classifications described in the Annex 1 of the WEEE Directive, this instrument is classified as a “Monitoring and Control Instrument”. To return this unwanted instrument, contact your nearest ITECH office.

IT9120 series Programming Guide

Compliance Information

Complies with the essential requirements of the following applicable European Directives, and carries the CE marking accordingly:

⚫ Electromagnetic Compatibility (EMC) Directive 2014/30/EU ⚫ Low-Voltage Directive (Safety) 2014/35/EU

Conforms with the following product standards:

EMC Standard

IEC 61326-1:2012/ EN 61326-1:2013 ¹²³

Reference Standards

CISPR 11:2009+A1:2010/ EN 55011:2009+A1:2010 (Group 1, Class A)

IEC 61000-4-2:2008/ 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 61000-4-6:2008/ EN 61000-4-6:2009

IEC 61000-4-11:2004/ EN 61000-4-11:2004

1. The product is intended for use in non-residential/non-domestic environments. Use of the product in residential/domestic environments may cause electromagnetic interference.

2. Connection of the instrument to a test object may produce radiations beyond the specified limit.

3. Use high-performance shielded interface cable to ensure conformity with the EMC standards listed above.

Safety Standard

IEC 61010-1:2010/ EN 61010-1:2010

IT9120 series Programming Guide

Content

Quality Certification and Assurance ............................................................................................................................ i

Warranty...................................................................................................................................................................... i

Limitation of Warranty ................................................................................................................................................ i

Safety Symbols ............................................................................................................................................................ i

Safety Precautions ...................................................................................................................................................... ii

Environmental Conditions .......................................................................................................................................... ii

Regulatory Markings ................................................................................................................................................. iii

Waste Electrical and Electronic Equipment (WEEE) Directive ................................................................................... iii

Compliance Information ............................................................................................................................................ iv

Chapter1 Remote Control .............................................................................................................................. 1

1.1 Overview .............................................................................................................................................................. 1

1.2 Command type ..................................................................................................................................................... 1

1.3 Command format ................................................................................................................................................. 3

1.4 Data type .............................................................................................................................................................. 4

1.5 Remote Operation ................................................................................................................................................ 5

Chapter2 Status Register Commands ............................................................................................................. 8

Standard Event Register ............................................................................................................................................. 8

Status Byte Register .................................................................................................................................................... 8

STATus:QUEStionable[:EVENt]? .................................................................................................................................. 9

STATus:QUEStionable:CONDition? .............................................................................................................................. 9

STATus:QUEStionable:ENABle<NRf> ........................................................................................................................... 9

STATus:QUEStionable:NTRansition ........................................................................................................................... 10

STATus: QUEStionable:PTRansition ........................................................................................................................... 10

STATus:OPERation[: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]:CURRent:AC? .................................................................................................................................. 14

MEASure[:SCALar]:CURRent:AC? ............................................................................................................................. 14

FETCh[:SCALar]:CURRent:CFACtor? .......................................................................................................................... 14

MEASure[:SCALar]:CURRent:CFACtor? ..................................................................................................................... 15

FETCh[:SCALar:]CURRent:DC? .................................................................................................................................. 15

MEASure[:SCALar:]CURRent:DC? ............................................................................................................................. 15

FETCh[:SCALar:]CURRent:RMS? ............................................................................................................................... 15

MEASure[:SCALar:]CURRent:RMS?........................................................................................................................... 16

FETCh[:SCALar:]CURRent:RMN? ............................................................................................................................... 16

MEASure[:SCALar:]CURRent:RMN? .......................................................................................................................... 16

FETCh[:SCALar:]CURRent:MN? ................................................................................................................................. 16

MEASure[:SCALar:]CURRent:MN? ............................................................................................................................ 17

FETCh[:SCALar]:CURRent:INRush? ........................................................................................................................... 17

MEASure[:SCALar:]CURRent:INRush? ...................................................................................................................... 17

FETCh[:SCALar]:CURRent:MAXPk? ........................................................................................................................... 17

MEASure[:SCALar]:CURRent:MAXPk? ...................................................................................................................... 18

FETCh[:SCALar]:CURRent:MINPk? ............................................................................................................................ 18

MEASure[:SCALar]:CURRent:MINPk? ....................................................................................................................... 18

FETCh[:SCALar]:CURRent:PPEak? ............................................................................................................................. 18

MEASure[:SCALar]:CURRent:PPEak? ........................................................................................................................ 19

Chapter4 Voltage Measurement Commands ................................................................................................ 20

FETCh[:SCALar]:VOLTage:AC? ................................................................................................................................... 20

MEASure[:SCALar]:VOLTage:AC? .............................................................................................................................. 20

FETCh:[:SCALar]:VOLTage:DC? .................................................................................................................................. 20

IT9120 series Programming Guide

MEASure[:SCALar]:VOLTage:DC? .............................................................................................................................. 20

FETCh:[:SCALar]:VOLTage:RMS? ............................................................................................................................... 21

MEASure[:SCALar]:VOLTage:RMS? ........................................................................................................................... 21

FETCh:[:SCALar]:VOLTage:RMN? .............................................................................................................................. 21

MEASure[:SCALar]:VOLTage:RMN? .......................................................................................................................... 21

FETCh:[:SCALar]:VOLTage:MN?................................................................................................................................. 21

MEASure[:SCALar]:VOLTage:MN? ............................................................................................................................. 22

FETCh[:SCALar]:VOLTage:CFACtor? ........................................................................................................................... 22

MEASure[:SCALar]:VOLTage:CFACtor? ...................................................................................................................... 22

FETCh[:SCALar]:VOLTage:MAXPk? ............................................................................................................................ 22

MEASure[:SCALar]:VOLTage:MAXPk? ....................................................................................................................... 23

FETCh[:SCALar]:VOLTage:MINPk? ............................................................................................................................. 23

MEASure[:SCALar]:VOLTage:MINPk? ........................................................................................................................ 23

FETCh[:SCALar]:VOLTage:PPEak? .............................................................................................................................. 23

MEASure[:SCALar]:VOLTage:PPEak? ......................................................................................................................... 24

Chapter5 Power Measurement Commands ................................................................................................. 25

FETCh[:SCALar]:POWer:ACTive? ............................................................................................................................... 25

MEASure[:SCALar]:POWer:ACTive? .......................................................................................................................... 25

FETCh[:SCALar]:POWer:APParent? ........................................................................................................................... 25

MEASure[:SCALar]:POWer:APParent? ...................................................................................................................... 25

FETCh[:SCALar]:POWer:REACtive? ........................................................................................................................... 26

MEASure[:SCALar]:POWer:REACtive? ...................................................................................................................... 26

FETCh[:SCALar]:POWer:PFACtor? ............................................................................................................................. 26

MEASure[:SCALar]:POWer:PFACtor? ........................................................................................................................ 26

FETCh[:SCALar]:POWer:PHASe? ............................................................................................................................... 26

MEASure[:SCALar]:POWer:PHASe? .......................................................................................................................... 27

Chapter6 Frequency 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? ...................................................................................................................... 29

MEASure[:SCALar]:FREQuency:SSOurce? ................................................................................................................. 29

Chapter7 Commands ................................................................................................................................... 30

FETCh[:SCALar]:ENERgy[:ACTive][:SUM]? ................................................................................................................ 30

MEASure[:SCALar]:ENERgy[:ACTive][:SUM]? ........................................................................................................... 30

FETCh[:SCALar]:ENERgy[:ACTive]:POSitive? ............................................................................................................. 30

MEASure[:SCALar]:ENERgy[:ACTive]:POSitive? ........................................................................................................ 30

FETCh[:SCALar]:ENERgy[:ACTive]:NEGative? ............................................................................................................ 31

MEASure[:SCALar]:ENERgy[:ACTive]:NEGative? ....................................................................................................... 31

FETCh[:SCALar]:ENERgy:CHARge[:SUM]? ................................................................................................................. 31

MEASure[:SCALar]:ENERgy:CHARge[:SUM]? ............................................................................................................ 31

FETCh[:SCALar]:ENERgy:CHARge:POStive? .............................................................................................................. 32

MEASure[:SCALar]:ENERgy:CHARge:POSitive? ......................................................................................................... 32

FETCh[:SCALar]:ENERgy:CHARge:NEGative? ............................................................................................................ 32

MEASure[:SCALar]:ENERgy:CHARge:NEGative? ....................................................................................................... 32

FETCh[:SCALar]:ENERgy:TIME? ................................................................................................................................. 32

MEASure[:SCALar]:ENERgy:TIME? ............................................................................................................................ 33

FETCh[:SCALar]:ENERgy[:ACTive]:AVERage? ............................................................................................................ 33

MEASure[:SCALar]:ENERgy[:ACTive]:AVERage? ....................................................................................................... 33

Chapter8 Harmonic Measurement Commands ............................................................................................ 34

FETCh[:SCALar]:HARMonics:CURRent:AMPLitude? ................................................................................................. 34

MEASure[:SCALar]:HARMonics:CURRent:AMPLitude? ............................................................................................ 34

FETCh[:SCALar]:HARMonics:CURRent:FUNDamental? ............................................................................................. 34

MEASure[:SCALar]:HARMonics:CURRent:FUNDamental? ........................................................................................ 35

IT9120 series Programming Guide

FETCh[:SCALar]:HARMonics:CURRent:THARmonic? ................................................................................................ 35

MEASure[:SCALar]:HARMonics:CURRent:THARmonic? ........................................................................................... 35

FETCh[:SCALar]:HARMonics:CURRent:THDistort? .................................................................................................... 35

MEASure[:SCALar]:HARMonics:CURRent:THDistort? ............................................................................................... 36

FETCh[:SCALar]:HARMonics:VOLTage:AMPLitude? .................................................................................................. 36

MEASure[:SCALar]:HARMonics:VOLTage:AMPLitude? ............................................................................................. 36

FETCh[:SCALar]:HARMonics:VOLTage:FUNDamental? ............................................................................................. 36

MEASure[:SCALar]:HARMonics:VOLTage:FUNDamental? ........................................................................................ 37

FETCh[:SCALar]:HARMonics:VOLTage:THARmonic? ................................................................................................. 37

MEASure[:SCALar]:HARMonics:VOLTage:THARmonic? ............................................................................................ 37

FETCh[:SCALar]:HARMonics:VOLTage:THDistort? .................................................................................................... 37

MEASure[:SCALar]:HARMonics:VOLTage:THDistort?................................................................................................ 38

FETCh[:SCALar]:HARMonics:POWer[:ACTive]:AMPLitude? ...................................................................................... 38

MEASure[:SCALar]:HARMonics:POWer[:ACTive]:AMPLitude? ................................................................................. 38

FETCh[:SCALar]:HARMonics:POWer[:ACTive]:FUNDamental? ................................................................................. 39

MEASure[:SCALar]:HARMonics:POWer[:ACTive]:FUNDamental? ............................................................................ 39

FETCh[:SCALar]:HARMonics:POWer[:ACTive]:THARmonic? ..................................................................................... 39

MEASure[:SCALar]:HARMonics:POWer[:ACTive]:THARmonic? ................................................................................ 39

FETCh[:SCALar]:HARMonics:POWer[:ACTive]:THDistort? ........................................................................................ 40

MEASure[:SCALar]:HARMonics:POWer[:ACTive]: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]:HARMonics:POWer:PFACtor? ......................................................................................................... 41

MEASure[:SCALar]:HARMonics:POWer:PFACtor? .................................................................................................... 42

FETCh[:SCALar]:HARMonics:POWer:PHASe:UU? ..................................................................................................... 42

MEASure[:SCALar]:HARMonics:POWer:PHASe:UU? ................................................................................................ 42

FETCh[:SCALar]:HARMonics:POWer:PHASe:UI? ....................................................................................................... 43

MEASure[:SCALar]:HARMonics:POWer:PHASe:UI? .................................................................................................. 43

FETCh[:SCALar]:HARMonics:POWer:PHASe:II? ........................................................................................................ 43

MEASure[:SCALar]:HARMonics:POWer:PHASe:II? ................................................................................................... 43

Chapter9 Sense Relevant Commands ........................................................................................................... 45

[:SENSe]AVERage[:STATe] <bool> ............................................................................................................................. 45

[:SENSe]AVERage:TCONtrol <name> ........................................................................................................................ 45

[:SENSe]AVERage:TYPE <boolean> ........................................................................................................................... 45

[:SENSe]AVERage:COUNt <n> ................................................................................................................................... 45

[:SENSe]CURRent:RANGe:AUTO <bool> ................................................................................................................... 46

[:SENSe]VOLTage:RANGe:AUTO <bool>.................................................................................................................... 46

[:SENSe]CURRent:RANGe <NRf> .............................................................................................................................. 46

[:SENSe]VOLTage:RANGe <NRf> ............................................................................................................................... 47

[:SENSe]CURRent:EXS1[:STATe] <b> ......................................................................................................................... 47

[:SENSe]CURRent:EXS2[:STATe] <b> ......................................................................................................................... 47

[:SENSe]CURRent:SRATio:EXS1 <NRf> ...................................................................................................................... 48

[:SENSe]CURRent:SRATio:EXS2 <NRf> ...................................................................................................................... 48

[SENSe:]CURRent:EXS:RANGe .................................................................................................................................. 48

Chapter10 Trigger Commands ........................................................................................................................ 50

ABORt ....................................................................................................................................................................... 50

INITiate:CONTinuous <state> ................................................................................................................................... 50

INITiate[:IMMediate] ................................................................................................................................................ 50

TRIGger:IMMediate .................................................................................................................................................. 50

TRIGger:SOURce <state> .......................................................................................................................................... 51

TRIGger:SLOPe <state> ............................................................................................................................................. 51

TRIGger:VOLTage:LEVel <level> ................................................................................................................................ 51

TRIGger:CURRent:LEVel <level> ............................................................................................................................... 52

Chapter11 Oscilloscope Commands ............................................................................................................... 53

IT9120 series Programming Guide

WAVE:TRIG:SOUR< VOLTage|CURRent|EXTernal > .................................................................................................. 53

WAVE:TRIG:SLOP <POSitive|NEGative|ANY> ........................................................................................................... 53

WAVE:TRIG:MODE <AUTO|NORMal> ...................................................................................................................... 53

WAVE:TRIG:DELay:TIME <n> .................................................................................................................................... 53

WAVE:TRIG:DIVTime（UNIT:S）<n> ........................................................................................................................ 54

WAVE:RUN ................................................................................................................................................................ 54

WAVE:STOP ............................................................................................................................................................... 54

WAVE:SINGLE ........................................................................................................................................................... 55

WAVE:VOLTage:DATA[:NORMalization]? .................................................................................................................. 55

WAVE:CURRent:DATA[:NORMalization]? .................................................................................................................. 55

WAVE:TRIGger[:STATe]? ............................................................................................................................................ 55

Chapter12 INPut Commands .......................................................................................................................... 57

[:INPut]:HARMonics:ORDer <NRI> ........................................................................................................................... 57

[:INPut]:HARMonic:PLLSource <OFF|U|I> ............................................................................................................... 57

[:INPut]:HARMonics:THD <THDR|THDF> ................................................................................................................. 57

[:INPut]:HARMonic:SEQuence <ALL|ODD|EVEN> ................................................................................................... 57

[:INPut]:SSOurce <OFF|U|I> .................................................................................................................................... 58

[:INPut]:CFACtor <NRI> ............................................................................................................................................. 58

[:INPut]:FILTer:FREQuency <bool> ............................................................................................................................ 58

[:INPut]:FILTer:LINE <bool> ....................................................................................................................................... 59

[:INPut]:RATE <NRI> ................................................................................................................................................. 59

[INPut:]:INTegral:ACAL <bool> ................................................................................................................................. 59

[INPut]:INTegral:QMODe {RMS|MN|DC|RMN|AC} ................................................................................................. 59

[INPut]:INTegral:WPTYpe {CHARge|SOLD|DISCharge|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] .................................................................................................................................... 62

[CALCulate]:INTegral:CLEar[:IMMediate] ................................................................................................................. 62

[CALCulate]:INTegral:CLEar:AUTO <ON|OFF> .......................................................................................................... 62

[CALCulate]:INTegral:STARt:SOURce < TIME|MAN> ................................................................................................ 62

[:CALCulate]:INTegral:STARt[:IMMediate] ................................................................................................................ 63

[:CALCulate]:INTegral:STOP:SOURce< TIME|MAN|TINTerval> ................................................................................ 63

[:CALCulate]:INTegral:STOP[:IMMediate] ................................................................................................................. 64

[:CALCulate]:INTegral:STOP:TINTerval < hhhh,mm,ss > ............................................................................................ 64

INTegral:CONDition?................................................................................................................................................. 65

[:CALCulate][:METer]:MAXHold[:STATe] <bool> ....................................................................................................... 65

[:CALCulate][:METer]:CLEar[:IMMediate] ................................................................................................................. 65

[:CALCulate]:HARMonic[:STATe] <bool> ................................................................................................................... 65

[:CALCulate]:SCOPe[:STATe] <bool> .......................................................................................................................... 66

[CALCulate:]HOLD[:STATe] <bool> ............................................................................................................................ 66

Chapter14 System Commands ....................................................................................................................... 67

SYSTem:BEEPer:IMMediate ...................................................................................................................................... 67

SYSTem:BEEPer[:STATe] <bool> ................................................................................................................................ 67

SYSTem:DATE <NRf>,<NRf>,<NRf> ........................................................................................................................ 67

SYSTem:TIME <NRf>,<NRf>,<NRf>............................................................................................................................ 67

SYSTem:KEY <NRi> .................................................................................................................................................... 68

SYSTem:ERRor? ......................................................................................................................................................... 68

SYSTem:LANGuage <NRi> ......................................................................................................................................... 68

SYSTem:LOCal ........................................................................................................................................................... 68

SYSTem:REMote ....................................................................................................................................................... 69

SYSTem:CLEar ........................................................................................................................................................... 69

SYSTem:RWLock ....................................................................................................................................................... 69

SYSTem:VERSion? ..................................................................................................................................................... 69

IT9120 series Programming Guide

Chapter15 Calibration Commands ................................................................................................................. 71

CALibration:ZERO ..................................................................................................................................................... 71

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 ......................................................................................................................................... 73

CALibrate:VOLTage[:LEVel] ....................................................................................................................................... 74

Chapter16 IEEE-488 Commands ..................................................................................................................... 75

*CLS .......................................................................................................................................................................... 75

*ESE .......................................................................................................................................................................... 75

*ESR? ........................................................................................................................................................................ 75

*IDN? ........................................................................................................................................................................ 76

*OPC ......................................................................................................................................................................... 76

*RST .......................................................................................................................................................................... 77

*SRE .......................................................................................................................................................................... 77

*STB? ........................................................................................................................................................................ 77

*WAI ......................................................................................................................................................................... 78

Remote Control

Chapter1 Remote Control

1.1 Overview

This chapter will provide following remote configuration introductions:

⚫ Command format ⚫ Data format ⚫ Remote Operation

1.2 Command type

Two command types for SCPI: common command and subsystem

⚫ Common command is basically irrelevant to specific operation, however, it

controls overall functionality of the instrument, such as reset, status and synchronization. All common commands are triliteral commands marked with asterisk: *RST *IDN?*SRE.

⚫ The subsystem command executes specified instrument functions. They

are organized into a reverse tree structure with root on the top. A part of subsystem command tree is shown in the following chart, with which you can obtain commands from different paths. See the following chart for 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 commands in a single

message:

⚫ Commands in a message are separated by a semicolon. ⚫ Head paths influence how the instrument interprets commands.

We consider the head path as a string which will be inserted in front of every command of a message. As for the first command of a message, the head path is a null string; for each subsequent command, the head path is a string which is defined to form the current command until and including the head of the last colon separator. A message with two combined commands Example: CURR:LEV 3;PROT:STAT OFF The example indicates the effect of semicolon and explains the concept of head path. Since the head path is defined to be "CURR" after "curr: lev 3", the head of

the second command, "curr", is deleted and the instrument explains the second command as:

CURR:PROT:STAT OFF

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If "curr" is explicitly included in the second command, it is semantically wrong. Since combining it with the head path will become "CURR:CURR:PROT:STAT

OFF", resulting in wrong command.

Movement in the subsystem

In order to combine commands in different subsystems, it is required to set the head path of message as a null string. If a command is started by a colon, the operation will discard all current head paths. For example, you may apply the following root specification to remove the output protection and inspect the status of operation status register in a message. PROTection:CLEAr;:STATus:OPERation:CONDition? The following command indicates how to combine commands from different subsystems as if in the same subsystem: POWer:LEVel 200;PROTection 28; :CURRent:LEVel 3;PROTection:STATe ON

Note to use the optional head LEVel to maintain path in the voltage and current subsystems and use the root specification to move among subsystems.

Including common command

You can combine the common command and subsystem command in the same message and consider the common command as a message 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;*TRG OUTPut OFF;*RCL 2;OUTPut ON IT872X-3X SCPI Communication Protocol 17

Case sensitivity

Common commands and SCPI commands are case insensitive: you may use upper or lower case or both, such as:

*RST = *rst :DATA? = :data? :SYSTem:PRESet = :system:preset

Long or short format

A SCPI command word can be sent in short or long format. The command subsystem table in the Chapter 5 provides long-format words. However, short

command words are expressed in uppercase characters: :SYSTem:PRESet long format :SYST:PRES short format :SYSTem:PRES combination of long and short formats Note that every command word must only be long or short format, and the long and short command words cannot be interleaved. For example: :SYSTe:PRESe

is an illegal command word which will cause an error. This command will not be

executed.

Check

Observe the following query alert:

⚫ To set a proper number of variables for the returned data, for example, if

you are reading a measurement sequence, you must provide fractal dimension to the sequence according to measurement number stored in the measurement cache.

⚫ Read back all query results before sending any command to the instrument.

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Otherwise an error of query interrupt will occur and missing data will not be sent back.

1.3 Command format

Formats for command display are as follows:

[SOURce[1|2]:]VOLTage:UNIT {VPP|VRMS|DBM} [SOURce[1|2]:]FREQuency:CENTer {<frequency>|MINimum|MAXimum|DEFault} Based on the command syntax, most commands (and certain parameters) are expressed in both upper and lower cases. Upper case refers to abbreviation of commands. Shorter program line may send commands in abbreviated format. Long-format commands may be sent to ensure better program readability. For example, both formats of VOLT and VOLTAGE are acceptable in the above syntax statements. Upper or lower case may be used. Therefore, formats of VOLTAGE, volt and Volt are all acceptable. Other formats (such as VOL and VOLTAG) are invalid and will cause errors.

⚫ Parameter options with given command strings are included in the brace

({ }). The brace is not sent along with command strings.

⚫ Vertical stripes (|) separate several parameter options with given command

strings. For example, {VPP|VRMS|DBM} indicates that you may assign "APP", "VRMS" or "DBM" in the above commands. Vertical stripes are not sent along with command strings.

⚫ Angle brackets (< >) in the second example indicates that a value must be

assigned to the parameter in the brace. For 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 parameter, unless you select other options displayed in the syntax (such as "FREQ:CENT MIN").

⚫ Some syntax elements (such as nodes and parameters) are included in

square brackets ([ ]). It indicates that these elements can be selected and omitted. Angle brackets are not sent along with command strings. If no value is assigned to the optional parameters, the instrument will select a default value. In the above examples, "SOURce[1|2]" indicates that you may refer to source channel 1 by "SOURce" or "SOURce1" or "SOUR1" or "SOUR". In addition, since the whole SOURce node is optional (in the square bracket), you can refer to the channel 1 by omitting the whole SOURce node. It is because the channel 1 is the default channel for SOURce language node. On the other hand, if you want to refer to channel 2, "SOURce2" or "SOUR2" must be used in the program line.

Colon (:)

It is used to separate key words of a command with the key words in next level. As shown below: APPL:SIN 455E3,1.15,0.0 In this example, APPLy command assigns a sine wave with frequency of 455 KHz, amplitude of 1.15 V and DC offset of 0.0 V.

Semicolon (;)

It is used to separate several commands in the same subsystem and can also minimize typing. For example, to send the following command string: TRIG:SOUR EXT; COUNT 10 has the same effect as sending the following two commands: TRIG:SOUR EXT

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TRIG:COUNT 10

Question mark (?)

You can insert question marks into a command to query current values of most parameters. For example, the following commands will trigger to set the count as 10: TRIG:COUN 10 Then, you may query count value by sending the following command: TRIG:COUN? You may also query the allowable minimum or maximum count as follows: TRIG:COUN?MIN TRIG:COUN?MAX

Comma (,)

If a command requires several parameters, then a comma must be used to separate adjacent parameters.

Space

You must use blank characters, [TAB] or [Space] to separate parameters with key words of commands.

Generic commands (*)

Execute functions like reset, self inspection and status operation. Generic commands always start with a asterisk (*) and occupy 3 character sizes, including one or more parameters. Key words of a command and the first parameter are separated by a space. Semicolon (;) can separate several commands as follows: *RST; *CLS; *ESE 32; *OPC?

Command terminator

Command strings 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 acceptable to place one <NL> after a <Enter>. Termination of command string always resets current SCPI command path to root level.

NOTE

As for every SCPI message with one query sent to the instrument, the instrument will use a <NL> or newline sign (EOI) to terminate response of return. For example, if "DISP:TEXT?" is sent, <NL> will be placed after the returned data string to terminate response. If an SCPI message includes several queries separated by semicolon (such as "DISP?;DISP:TEXT?"), <NL> will terminate response returned after response to the last query. In all cases, the program must read <NL> in response before another command is sent to the instrument, otherwise errors will be caused.

1.4 Data type

SCPI language defines several data types used for program message and response messages.

⚫ Numerical parameter ⚫ Commands requiring numerical parameters support the notations of all

common decimal notations, including optional signs, decimal points, scientific notation, etc. Special values of numerical parameters are also

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acceptable, such as MIN, MAX and DEF. In addition, suffixes for engineering units can also be sent together with numerical parameters (including M, k, m or u). If the command accepts only some specific values, the instrument will automatically round the input parameters to acceptable values. The following commands require numerical parameters of frequency value: [SOURce[1|2]:]FREQuency:CENTer {<Frequency>|MINimum|MAXimum}

⚫ Discrete parameter ⚫ Discrete parameters are used for settings with limited number of

programming values (such as IMMediate, EXTernal or BUS). They can use short and long format like key words of commands. They may be expressed in both upper and lower case. The query response always returns uppercase parameters in short format. The following commands require discrete parameters in voltage unit: [SOURce[1|2]:]VOLTage:UNIT {VPP|VRMS|DBM}

⚫ Boolean parameter ⚫ Boolean parameters refer to true or false binary conditions. In case of false

conditions, the instrument will accept "OFF" or "0". In case of true conditions, the instrument will accept "ON" or "1". In query of Boolean settings, the instrument will always return "0" or "1". Boolean parameters are required by the following commands: DISPlay {OFF|0|ON|1}

⚫ ASCII string parameters ⚫ String parameters may actually include all 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 one part of a string, they can be typed twice without any character added between them. String parameter is used in the following command: DISPlay:TEXT <quoted string> For example, the following commands display message of "WAITING..." (without quotation marks) on the front panel of the instrument.

DISP:TEXT "WAITING..." Single quotation marks may also be used to display the same message. DISP:TEXT 'WAITING...'

1.5 Remote Operation

There are four types of communication interfaces available:USB,Ethernet,GPIB and RS232.You can choose any one of them to communicate with a PC.

RS-232 Interface

RS232 interface:use a cable with two COM interface（DB9）to connect power meter and PC. It can be activated by menu key on the front panel.All SCPI commands are available through RS-232 programming. ⚫ RS-232 data format

The RS-232 data is a 10-bit word with one start bit and one stop bit. The number of start and stop bits is not programmable.

⚫ Baudrate

Available baudrate:4800 9600 19200 38400 57600 115200

⚫ RS-232 connection

The RS-232 serial port can be connected to the serial port of a controller (i.e., personal computer) using a straight through RS-232 cable terminated with DB-9 connectiors. Do not use a null modem cable. Table 2－2 shows the pinout for the connector.

If your computer uses a DB-25connector for the RS-232interface, you will

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need a cable or adapter with a DB-25 connector on one end and a DB-9 connector on the other, wired straight through(not null modem).

RS232 Pins of Plug

Base pin number

Description 1

No conjunction

TXD, data transmission

RXD, data receiving

No conjunction

GND, grounding

No conjunction

CTS, clear to send

RTS, request to send

No conjunction

RS-232 troubleshooting:

If you are having trouble communicating over the RS-232 interface,check the following: The computer and the power meter must be configured for the same baudrate, parity, number of data bits,and flow control options. Note that the eledtronic load is configured for 1 start bit and 1stop bit (these values are fixed). The correct interface cables or adapters must be used, as described under RS-232 connector. Note that even if the cable has the proper connectors for your system,the internal wiring may 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 parameters of electronic load match that of PC. Baud rate :9600(4800、9600、19200、38400、57600、115200). You can enter system menu through panel to set communication baud rate. Data bit:8 Stop bit:1 Parity:(none,even,odd) EVEN:: eight data bits with even parity ODD::eight data bits with odd parity NONE: : eight data bits without parity

Start Bit

8 Data Bits

Parity=None

Stop Bit

USB interface

Use Type A to Type B USB cables to connect the power meter. The USB interface capabilities of the power meter are described below:

⚫ The interface is IEEE488.2 standard USB488 interface ⚫ The interface accepts REN_CONTROL 、 GO_TO_LOCAL 、

LOCAL_LOCKOUT request.

⚫ The interface accepts MsgID = TRIGGER USBTMC command message

and forwards TRIGGER requests to the function layer.

The USB488 device capabilities of the power meter are described below:

⚫ The device understands all mandatory SCPI commands. ⚫ The device is SR1 capable. ⚫ The device is RL1 capable.

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⚫ The device is DT1 capable.

GPIB interface

First conncet GPIB port of power meter to GPIB card of PC. They must be sufficient contact and tighten the screws. And then set address. The address can be set from 0 to 30.

LAN interface

Use a network cable to connect PC through LAN interface of the power meter.

⚫ IP mode

MANU: manually set IP address, subnet mask, default gateway, etc. DHCP (Dynamic Host Configuration Protocol) DHCP refers to a protocol that temporarily assigns necessary information to PCs connected to the Internet. If the network is provided with an available DHCP server, the server will automatically assign information (IP address, subnet mask and default gateway) to PCs and other equipment connected to the network. IT9120 series cannot use DHCP unless the network is provided with a DHCP server. Please ask your network administrator DHCP if DHCP is available.

⚫ IP Address

IP addresses assigned to IT9120 series can be set. Default address is

192.168.000.000.

 IP address refers to ID assigned by the network to each 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 provide an IP address.  Use DHCP network to automatically set the IP address.

⚫ Subnet masksetting

The mask used when subnet website is determined from an IP address may be set. Default address is 255.255.255.255.  Vast TCP/IP networks like Internet are often divided into several small

networks, i.e. subnets. The subnet mask is used to identify how many digits of the 32-digit values in the IP address belong to the subnet address. The part beyond the network address is used to identify the host number of each PC connected to the network.

 Ask your network administrator about values of subnet mask.  Use DHCP network to automatically set the subnet mask.

⚫ Gatewaysetting

IP address of gateway may be set to communicate with equipment in other network (default gateway). Default address is 192.168.000.000.  The default gateway controls data exchange between networks and

protocols to ensure smooth data transmission.

 Ask your network administrator about values of default gateway. It is

possible that the setting is unnecessary.

Use DHCP network to automatically set the default gateway.

Status Register Commands

Chapter2 Status Register Commands

IT9120 series has two kinds of status register:Operation status register and

Query status register.Using status register’s commands can set or query status

Standard Event Register

Event register is a kind of read-only memory.It is used to save the current execution situation of power meter.Event register’s data applies latch format,once the data is saved,the following data will be ignored.Sending command *RST or restart the power meter will not change the datas in event register.But if query the event register or sending clear command *CLS,the datas will be cleared automatically. The standard event register includes following status:output status,command syntax error,command execution error,selftest or calibration error,query error etc.

Bit

Definition

OPC

Operation Complete.Set to 1 when the operation designated by the *OPC command has been completed.

RQC

Not used ,Always set to 0.

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.

DDE

Device Error. Set to 1 when execution of the command is not possible due to an internal problem in the Instrument that is not a command error or an execution error.

EXE

Execution Error. Set to 1 when the command syntax is correct but the command cannot be executed in the current state.

CME

Command Error. Set to 1 when the command syntax is incorrect.

Not Used

Not Used ,Always set to 0. 7

PON

Power On. Set to 1 when the power is turned ON.

Status Byte Register

Status byte register is used to record other register’s message.Among which

the query datas are temporarily stored into the output buffer of power meter and

feedback to the operator via bit4.Status byte register’s datas will not be

latched.Once the event register’s status changed,then the corresponding bit of status byte register will be changed too.

Bit

Definition

MSB

Measurement Summary Bit

Not Used

Always set to 0.

EAV

Error Available

QSB

Questionable Summary Bit

MAV

Message Available

ESB

Event Summary Bit

RQS

Request for service

OSB

OSB(Operation Summary Bit)

Status Register Commands

STATus:QUEStionable[:EVENt]?

This command is used to read the value of query event register.Power meter will return a decimal number which is the binary weighted sum of each bits of register.All these bits value is latched and will be cleared after executing this command.

Query syntax

STATus:QUEStionable[:EVENt]?

Parameters

None

Returned value

<NR1>

Related commands

STATus:QUEStionable: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:CONDition?

Paramters

None

Returned value

<NR1>

STATus:QUEStionable:ENABle<NRf>

This command is used to set the value of query event enable registers.This register is a mask of enabling specific bits from the questionable event register to set the questionable summary bit(ques) of the status byte register.

Command syntax:

STATus:QUEStionable:ENABle <NRf>

Parameters:

0～65535

Power-on value

Refer to *PSC command

Example

STATus:QUEStionable:ENABle 16

Status Register Commands

Query syntax

STATus:QUEStionable:ENABle?

Returnded value

<NR1>

Related command

*PSC

Bit 0

Voltage summary questionable

Bit 1

Current summary questionable

Bit 5

Frequency questionable

Bit 7

Sync questionable (lost sync)

Bit 8

PLL source questionable (lost pll)

STATus:QUEStionable:NTRansition

This command set the value of the Questionable NTR(Negative-Transition) register.The register serve as polarity filters between the Questionable Condition and Questionable Event registers to cause the following actions. When a bit of Questionable NTR register is set to 1,then a 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>

Parameters

0～65535

Example

STATus:QUEStionable:NTRansition 128

Query syntax

STATus:QUEStionable:NTRansition?

STATus: QUEStionable:PTRansition

This command set the value of the Questionable PTR(Positive-Transition) register.The register serve as polarity filters between the Questionable Condition and Questionable Event registers to cause the following actions. When a bit of Questionable PTR register is set to 1,then a 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:PTRansition <NR1>

Parameters:

0～65535

Status Register Commands

Example

STATus:QUEStionable:PTRansition 128

Query syntax

STATus:QUEStionable:PTRansition?

STATus:OPERation[:EVENt]?

This query returns the value of the Operation Event register.The Event register is a read-only register,which stores(latches) all events that are passed by the Operation NTR and/or PTR filter.Reading the Operation Event register clears it.

Query syntax

STATus:OPERation[:EVENt]?

Parameters

None

Returned values

<NR1>

Related command

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:OPERation:CONDition?

This query returns the value of the Operation Condition register.That is a read-only register,which holds the live(unlatched) operational status of the power meter.

Query syntax:

STATus:OPERation:CONDition?

Parameters:

None

Returned value:

<NR1>

STATus:OPERation:ENABle

This command set the value of the Operational Enable register.This register is a mask for enabling specific bits from the Operation Event register to set the operation summary bit(OPER) of the Status Byte register.

Status Register Commands

Command syntax:

STATus:OPERation:ENABle <NR1>

Parameters:

0～65535

Example:

STATus:OPERation:ENABle 128

Query syntax:

STATus: OPERation:ENABle?

Returned value:

<NR1>

STATus:OPERation:NTRansition

This command set the value of the Operation NTR(Negative-Transition) register.The programmed parameters define the specific bits from operation 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:NTRansition 128

Query syntax:

STATus:OPERation:NTRansition

STATus:OPERation:PTRansition

This command set the value of the Operation PTR(Positive-Transition) register.The programmed parameters define the specific bits from operation event register which will cause the operation summary bit(OPER) of the status register to be 1.

Command syntax:

STATus:OPERation:PTRansition <NR1>

Parameters

0～65535

Status Register Commands

Example

STATus:OPERation:PTRansition 128

Current Measurement Commands

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

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

Current Measurement Commands

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:CFACtor?

Returned value

<NR2>

MEASure[:SCALar]:CURRent:CFACtor?

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

Command syntax:

MEASure[:SCALar]:CURRent:CFACtor?

Returned value

<NR2>

FETCh[:SCALar:]CURRent:DC?

This command 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 value that has been measured.

Command syntax:

FETCh[:SCALar:]CURRent:DC?

Returned value

<NR2>

MEASure[:SCALar:]CURRent:DC?

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

Command Syntax

MEASure[:SCALar:]CURRent:DC?

Returned value

<NR2>

FETCh[:SCALar:]CURRent:RMS?

This command is used to read the latest pre-processing current effective value.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

Current Measurement Commands

been measured.

Command Syntax:

FETCh[:SCALar:]CURRent:RMS?

Returned value

<NR2>

MEASure[:SCALar:]CURRent:RMS?

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

Command Syntax:

MEASure[:SCALar:]CURRent:RMS?

Returned value:

<NR2>

FETCh[:SCALar:]CURRent:RMN?

This command is used to read the latest pre-processing current rectified mean value(RMN).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:RMN?

Returned value

<NR2>

MEASure[:SCALar:]CURRent:RMN?

This command will trigger the measurement operation to get a real-time current rectified mean value(RMN).

Command Syntax:

MEASure[:SCALar:]CURRent:RMN?

Returned value:

<NR2>

FETCh[:SCALar:]CURRent:MN?

This command is used to read the latest pre-processing MN(Calibration to the average rectified value of the effective value) of current.It will not affect the device setting values and will not trigger the measurement operation.It only requires to get the latest value that has been measured.

+ 63 hidden pages

iTech IT9121, IT9121H, IT9121C, IT9121E User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Quality Certification and Assurance

Warranty

Limitation of Warranty

Safety Symbols

Safety Precautions

Environmental Conditions

Regulatory Markings

Waste Electrical and Electronic Equipment (WEEE) Directive

Compliance Information

Chapter1 Remote Control

1.1 Overview

1.2 Command type

1.3 Command format

1.4 Data type

1.5 Remote Operation

Chapter2 Status Register Commands

Standard Event Register

Status Byte Register

STATus:QUEStionable[:EVENt]?

STATus:QUEStionable:CONDition?

STATus:QUEStionable:ENABle<NRf>

STATus:QUEStionable:NTRansition

STATus: QUEStionable:PTRansition

STATus:OPERation[:EVENt]?

STATus:OPERation:ENABle

STATus:OPERation:CONDition?

STATus:OPERation:NTRansition

STATus:OPERation:PTRansition

Chapter3 Current Measurement Commands

FETCh?

FETCh[:SCALar]:CURRent:AC?

MEASure[:SCALar]:CURRent:AC?

FETCh[:SCALar]:CURRent:CFACtor?

MEASure[:SCALar]:CURRent:CFACtor?

FETCh[:SCALar:]CURRent:DC?

MEASure[:SCALar:]CURRent:DC?

FETCh[:SCALar:]CURRent:RMS?

MEASure[:SCALar:]CURRent:RMS?

FETCh[:SCALar:]CURRent:RMN?

MEASure[:SCALar:]CURRent:RMN?

FETCh[:SCALar:]CURRent:MN?