ITech IT9121 Series User Manual
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ITech IT9121 Series User Manual

It9121 series power meter
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Power meter
IT9121 Series User Manual
Model: IT9121
Version:V1.4

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Summary of Contents for ITech IT9121 Series

  • Page 1 Power meter IT9121 Series User Manual Model: IT9121 Version:V1.4...
  • Page 2 Trademarks any information contained herein. A WARNING sign denotes a Should ITECh and the user enter Pentium is U.S. registered trademarks hazard. It calls attention to an into a separate written agreement of Intel Corporation.

  • Page 3: Warranty

    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: ...

  • Page 4: Safety Precautions

    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.

  • Page 5: Waste Electrical And Electronic Equiment (Weee) Directive

    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. Copyright © Itech Electronics Co., Ltd.

  • Page 6: Compliance Information

    Connection of the instrument to a test object may produce radiations beyond the specified limit. 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 Copyright © Itech Electronics Co., Ltd.

  • Page 7: Table Of Contents

    Routine Maintenance ........................38 7.1 Self-inspection ............................... 38 7.2 Error Information References ........................38 7.3 Daily maintenance ............................40 7.4 Contact of ITECH Engineers..........................40 Chapter8 Technical Specifications ........................42 8.1 General Specification ............................. 42 8.2 Screen Display ............................... 42 8.3 Input Parameters ............................
  • Page 8 IT9121 User’s Manual 8.9 Fundamental Frequency ..........................48 8.10 Accuracy ..............................48 8.11 Oscilloscope Function ..........................49 8.12 Interface Specification ..........................49 Copyright © Itech Electronics Co., Ltd.

  • Page 9: Quality Certification And Assurance

    With promotion of the concept of using energy in a rational and environmentally friendly manner, more and more household appliances adopt the variable frequency control technology to reduce the power consumption. The IT9121 power meter can measure the inrush current, active power, crest factor, etc. Copyright © Itech Electronics Co., Ltd.

  • Page 10: Environmental Conditions

    13 Parameter setting key 14. Menu key 15 Power switch 1.3 Introduction to keyboard The functions of keys on the front panel of the IT9121 series power meter are shown in the following table. Key tag Name and function Waveform Display key When this key is pressed,the waveform corresponding to current measurement data will be displayed.

  • Page 11: Regulatory Markings

    Type B Connect Select the USB communication interface. The address is adjustable between 1 and 30. GPIB GPIB Address IP mode: MANU/DHCP IP mode IP address setting IP Address Set the subnetmask. Subnet mask Set the gateway. Gateway Copyright © Itech Electronics Co., Ltd.
  • Page 12 Sync Source Set the frequency filter: ON/OFF Freq Filter Set theline filter: ON/OFF Line Filter Set the crest factor: CF3/CF6 Crest Factor Set the data updating rate: Update Rate 0.1s/0.25s/0.5s/1s/2s/5s Inrush setting INRUSH SET Copyright © Itech Electronics Co., Ltd.

  • Page 13: Introduction Of Interface Display Information

    This icon appears when the frequency filter is switched on. This icon appears when USB is inserted. Over-voltage protection icon: this icon appears when over-voltage occurs. Over-current protection icon: this icon appears when over-current occurs. Copyright © Itech Electronics Co., Ltd.

  • Page 14: Introduction Of Rear Panels

    The external sensor interface (as shown in Fig. 7 above) of IT 9121 power meter is installed with a protective jacket at ex-factory, which should be correctly installed at all circumstances unless an external sensor permitted by ITECH is used. Copyright © Itech Electronics Co., Ltd.

  • Page 15: Chapter2 Measurement Conditions

    Press the “Enter” key to confirm the setting. The instrument will automatically confirm and exit the setting in case of no operation on the interface for more than 5s.  When the crest factor is 6: Figure: Voltage Range Figure: Current Range Copyright © Itech Electronics Co., Ltd.
  • Page 16 For the voltage range, when the crest factor is 3, the maximum option is “600V” and the minimum option is “15V”. When the crest factor is 6, the maximum option is “300V” and the minimum option is “7.5V”. Copyright © Itech Electronics Co., Ltd.

  • Page 17: Setting Of Measurement Interval

    The reference input signal used for defining the input signal measurement interval is called the synchronization source.  Measurement interval for conventional measurement  The measurement interval of the reference input signal is the time from the Copyright © Itech Electronics Co., Ltd.
  • Page 18 PLL source in the instrument. The sampling data or measurement interval for calculation may be different from the sampling data or measurement interval of the measurement function in conventional measurement. Copyright © Itech Electronics Co., Ltd.

  • Page 19: Setting Of Filter And Crest Factor

    When the frequency filter is switched on, the voltage or current of no more than 200Hz can be measured. The cutoff frequency is 500HZ. Copyright © Itech Electronics Co., Ltd.

  • Page 20: Setting Of Averaging Function

    (blue font background), and then press the soft key corresponding to the parameter on the right to set the required value, as shown in the following diagram. Copyright © Itech Electronics Co., Ltd.
  • Page 21 Mn: the nth measured data. K: attenuation constant (1-64)  Linear averaging ..− − − − Computing formula: Dn: the value displayed after linear averaging of m values from the (n-(m-1))th to nth value Copyright © Itech Electronics Co., Ltd.

  • Page 22: Averaging Function

    The following measurement functions will not be affected by averaging. Conventional measurement functions:fU, fI, Ipk+, Ipk-, Upk+, Upk-, Time, WP, WP+, WP-, q+, q-, q and Fsyn. Harmonic measurement functions: φ(k) , φUU(k) and φII(k) (k indicates the harmonic times). Copyright © Itech Electronics Co., Ltd.

  • Page 23: Chapter3 Basic Measurement Functions

    Active power [W] Average rectified value after the current is calibrated to the effective value Reactive power [var] Average current Apparent power [VA] Ipk+ Positive current peak value Power factor Ipk- Negative current peak value Copyright © Itech Electronics Co., Ltd.

  • Page 24: Setting Of Measurement Function And Interface Display

    Other measurement parameters can be viewed by pressing key to turn pages, as shown in the figure below. When the soft key corresponding to “CONFIG” is pressed, the measurement function can be selected and the interface display Copyright © Itech Electronics Co., Ltd.
  • Page 25 You can also press the “INSERT PAGE” to add a display page. At most five pages are allowable. Press the “DELETE PAGE” to delete the display page. At least one page should be left. Copyright © Itech Electronics Co., Ltd.

  • Page 26: Chapter4 Waveform Display Function

    When single measurement is performed under running conditions, measurement will be performed immediately by the instrument and then the stop status will be enabled. SCOPE(U/I/UI) Select the waveform to be displayed on the screen: voltage/current/voltage and current. Copyright © Itech Electronics Co., Ltd.
  • Page 27 When the “Stop” soft key in the waveform display interface is pressed, the trigger status Stop will be displayed. Vertical calibration When the crest factor CF is 3, the selected voltage range and current range will Copyright © Itech Electronics Co., Ltd.
  • Page 28 When the “KNOB SEL” soft key is pressed and “TL” is selected, the trigger level can be adjusted by rotating the knob. In this case, the trigger level can be changed by rotating the knob, and changes in the Copyright © Itech Electronics Co., Ltd.

  • Page 29: Adjustment Of Measurement Parameters

    “TIRG SET” parameter to enter the trigger setting interface, as shown below. Press the right soft key corresponding to the parameter to select the required trigger configuration.  Source: trigger source  Mode: trigger mode  Slope: trigger slope Copyright © Itech Electronics Co., Ltd.
  • Page 30 Minimum pulse width: refers to the width of the high or low trigger level, at least 1µs. Trigger delay time: refers to the delay between the appearance of the trigger level and the response of CPU, within (1μs + 3 sampling cycles). Copyright © Itech Electronics Co., Ltd.

  • Page 31: Chapter5 Integral Operation Function

    See the schematic diagram below. Introduction of soft keys on the interface When the “Integ” button is pressed, the initial integral measurement interface below will appear. Copyright © Itech Electronics Co., Ltd.
  • Page 32 STOP Integral Stop key In the manual stop mode, the integral function can be disabled by pressing the soft key corresponding to this parameter. SETUP Set relevant parameters of integral measurement. Copyright © Itech Electronics Co., Ltd.
  • Page 33 In q, displayed as q (ampere hours, the sum of positive and negative ampere hours), q+ (the consumption of positive ampere hours) and q- (the negative ampere hours of feedback power)  Average active power integral In watt, displayed as WPAV (average active power integral) Copyright © Itech Electronics Co., Ltd.
  • Page 34 Integral operation Integral start Executable Unenforceable Executable Integral stop Unenforceable Executable Unenforceable Integral resetting Executable Unenforceable Executable Other operations Save operation Executable Executable Executable Hold operation Executable Executable Executable Single measurement Executable Executable Executable operation Copyright © Itech Electronics Co., Ltd.

  • Page 35: Setting Of Integral Measurement Configuration

     MANUAL: press the “STOP” soft key in theintegral measurement interface in the manual stop mode tomanually stop integration. When the integration time reaches the maximum integration time (10,000 hours) or the integral Copyright © Itech Electronics Co., Ltd.
  • Page 36 When it reaches the set ending date and time or the integral value reaches the maximum/minimum display integral value, integration will be stopped, and the current integral time and integral value will be kept. Copyright © Itech Electronics Co., Ltd.

  • Page 37: Integration

    Press “Integ” to enter the integral display interface. In the integral measurement display interface Press the soft key corresponding to the “START” parameter to start or recover integral operation. The Start status and integral operation value are displayed in the Copyright © Itech Electronics Co., Ltd.
  • Page 38 The relationship diagram of start, suspension and resetting of the integral operation status is shown below.  Auto Clear: when ON is selected.  Auto Clear: when OFF is selected. Copyright © Itech Electronics Co., Ltd.
  • Page 39 Integral Operation Function Copyright © Itech Electronics Co., Ltd.

  • Page 40: Chapter6 Harmonic Measurement Function

    RUN/HOLD: press the soft key corresponding to this parameter to run/hold the harmonic status. RESET Reset. FUNC(P/I/U) Function options (power/current/voltage) Displayed in the bar chart form LIST Displayed in the list form SETUP Parameter setting. Copyright © Itech Electronics Co., Ltd.
  • Page 41 The user can rotate the knob to select the single-order harmonics to be displayed. The selected harmonics are displayed in red in the bar chart form.  Description of harmonic list interface When the “LIST” button is selected in the harmonic measurement interface, Copyright © Itech Electronics Co., Ltd.
  • Page 42 The rows which are not displayed, i.e. single-order harmonic data which are not displayed, can be presented by operating the Up/Down key. In this case, the row scroll bar and current page in displayed in bright blue bars. Copyright © Itech Electronics Co., Ltd.

  • Page 43: Setting Of Harmonic Measurement Configuration

    %r: using all harmonic measurement data from the minimum harmonic order (0) to the maximum harmonic order (within the upper limit of analysis orders) as the denominator.  %f: using the data of fundamental wave (1-order) components as the Copyright © Itech Electronics Co., Ltd.
  • Page 44 PLL source changes or the fundamental wave frequency cannot be measured as a result of waveform distortion, accurate measurement results may not be obtained. When the test object is a switch type power supply Copyright © Itech Electronics Co., Ltd.
  • Page 45 100ms. In this case, the harmonic measurement time is approximately more than or equal to 150ms (data measurement interval and data processing time). Therefore, please select the data updating rate of 250ms or more for measurement and display of harmonic data. Copyright © Itech Electronics Co., Ltd.

  • Page 46: Chapter7 Routine Maintenance

    It displays The maximum page has been reached. One page should exist at least One page should exist at least. Not used in current state The current operation is not available. Please reset first Please reset first. Copyright © Itech Electronics Co., Ltd.
  • Page 47 [Error description] The oscilloscope function cannot be enabled. [Possible cause] Communication abnormality [Disposal] Check the communication cable. Time set fail [Error description] Time setting fails. [Possible cause] Time setting is illegal. [Disposal] Reset the system time. Copyright © Itech Electronics Co., Ltd.

  • Page 48: Daily Maintenance

    Press the “START” soft key to initialize system settings. Press the ESC to exit. 7.4 Contact of ITECH Engineers This section describes operations to be carried out by the user in case of failure of the instrument. Copyright © Itech Electronics Co., Ltd.
  • Page 49 Collect the SN number. ITECH will constantly improve the product performance, availability and reliability. The service personnel of ITECH will record changes of each instrument. All relevant information are marked uniquely according to the serial number of each instrument. The equipment returned for repair must adopt the SN number as the tracking ID.

  • Page 50: Chapter8 Technical Specifications

    Value display optional to display the array number. 8.3 Input Parameters Input Description parameter Input Volta terminals plug-in terminal(safety terminal) type Direct input large binding post Curr Input type External DB9 connector current sensor Copyright © Itech Electronics Co., Ltd.
  • Page 51 150A or RMS value of 40A,whichever is range input(1s) less 0.5A~20A Peak value less than or equal to 10 times of the rated Sensor input range Input DC,0.5Hz~100KHz bandwidth Continuous 600Vrms,CAT Ⅱ maximum Common- Copyright © Itech Electronics Co., Ltd.

  • Page 52: Voltage And Current Accuracy

    ±(0.1% of reading+0.1% of range) * f is the frequency of input 66Hz<f ≤ 1kHz ±(0.2% of reading+0.2% of range) signal in the reading error 1kHz<f≤10kHz ±(0.1% reading+0.3% formula, the unit is kHz. Copyright © Itech Electronics Co., Ltd.

  • Page 53: Voltage Current And Power Measurements

    660% of the current setting range Range decrease When meet any of the following conditions, the range will decrease automatically. • Urms or Irms is less than or equal to 30% of the current setting range Copyright © Itech Electronics Co., Ltd.
  • Page 54 Line filter Select OFF or ON (cutoff frequency at 500Hz) Measures the peak (max,min) value of voltage,current or power Peak from the instantaneous current or instantaneous power that is measurement sampled. Copyright © Itech Electronics Co., Ltd.

  • Page 55: Frequency Measurement

    Kth harmonic power Reactive Q(k): reactive power of Kth Q(Total): total reactive power(var) harmonic power Power PF(k) : power factor of Kth PF(Total): Total power factor harmonic factor φ(k): phase difference φ: total phase phase Copyright © Itech Electronics Co., Ltd.

  • Page 56: Fundamental Frequency

    *When line filter is off, the accuracy shown below is the sum of reading and range errors. Frequency Voltage Current Power 0.15% of reading 0.15% of reading 0.15% of reading 10Hz≤f<45Hz +0.35% of range +0.35% of range +0.50% of range Copyright © Itech Electronics Co., Ltd.

  • Page 57: Oscilloscope Function

    Interface type Type B (socket) Electrical and mechanical specifications USB 2.0 Transmission speed Maximum speed is 12Mbps Port number Power supply Self-powered Support service Remote control Support system Run PC with Windows 7(SP4 version or Copyright © Itech Electronics Co., Ltd.
  • Page 58 The baud rate can be set(Default:9600) Start bit 1 bit Data length 8 bits Parity bit NONE Stop bit 1 bit Ethernet Communication Item Specification Port number Interface RJ-45 Electrical and mechanical specifications IEEE802.3 Copyright © Itech Electronics Co., Ltd.
  • Page 59 Technical Specifications Transmission system Ethernet (100BASE-TX) Transmission speed Maximum speed: 100Mbps Communication protocol TCP/IP Support equipment FTP service、DHCP、DNS、Remote control (VXI-11) Copyright © Itech Electronics Co., Ltd.
  • Page 60 Contact Us Thanks for purchasing ITECH products. In case of any doubts, please contact us as follows: 1. Refer to accompanying data disk and relevant manual. 2. Visit ITECH website:www.itechate.com 3. Select the most convenient contact method, for further information.

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