I-tech It9121h Operating instructions

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

Manual Part Number

IT9120-402146

Revision

3rd 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 
 Copyright@ITECH ELECTRONIC CO.,LTD v
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 

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 Copyright@ITECH ELECTRONIC CO.,LTD vi 
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 
 Copyright@ITECH ELECTRONIC CO.,LTD vii 
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 

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 Copyright@ITECH ELECTRONIC CO.,LTD viii 
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 