KYORITSU KEW 6305 Instruction Manual
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KYORITSU KEW 6305 Instruction Manual

Digital power meter
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INSTRUCTION MANUAL
DIGITAL POWER METER
KEW 6305
Kyoritsu Electrical Instruments Works, Ltd.

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  • Page 1 INSTRUCTION MANUAL DIGITAL POWER METER KEW 6305 Kyoritsu Electrical Instruments Works, Ltd.
  • Page 2 ● Unpacking procedure We thank you for purchasing our digital Power Meter KEW6305. Please check the contents and instrument before us ● Items listed below are included with the standard set: Main unit KEW6305: 1 unit MODEL7141B:1 set Voltage test lead (RED, GREEN, BLUE, BLACK: 1 pce for each) Power cord...
  • Page 3 (with magnet) ● Storage Store the items as shown below after use. ● In case any of the items listed above are found to be damaged or missing or if printing is unclear, please contact your local KYORITSU distributor. KEW6305...
  • Page 4 ● Safety warnings This instrument has been designed, manufactured and tested according to IEC 61010-1: Safety requirements for Electronic Measuring apparatus, and delivered in the best condition after passing quality control tests. This instruction manual contains warnings and safety procedures which have to be observed by the user to ensure safe operation of the instrument and to maintain it in safe condition.
  • Page 5 O Measurement Category To ensure safe operation of measuring instruments, IEC 61010 establishes safety standards for various electrical environments, categorized as O to CAT.IV, and called measurement categories. Higher-numbered categories correspond to electrical environments with greater momentary energy, so a measuring instrument designed for CAT.III environments can endure greater momentary energy than one designed for CAT.II.
  • Page 6 DANGER ● Verify proper operation on a known source before use. ● Verify proper operation on a known source before taking action as a result of the indication of the instrument. ● Never make measurement on a circuit in which the electrical potential exceeds 600VAC. ●...
  • Page 7 ● If the instrument begins to emit smoke, becomes too hot, or gives off an unusual smell, immediately power it off and disconnect the power cord from the outlet. Also power off the power to the object under test. If any anomalies as noted, contact your local KYORITSU distributor. - Use of protective gears - ●...
  • Page 8 CAUTION ● Caution should be taken since conductors under test may be hot. ● Never apply currents or voltages exceeding the maximum allowable input for the instrument for a long time. ● Do not apply currents or voltages for the Voltage test leads or Clamp sensors while the instrument is off.
  • Page 9 KEW6305...

  • Page 10: Instrument Overview

    1. Instrument Overview 1.1 Functional Overview SET UP WIRING CHECK Make settings for KEW6305 or for Check the connections and display the measurements. results. See “Wiring check (Section 10)” for further See “Setting (Section 4)” for further details. details. KEW6305...
  • Page 11 _W_ Instantaneous value measurement Measure/ display the instantaneous values of current, voltage and electric power. See “Instantaneous value Measurement (Section 6)” for further details. _Wh_ Integration value measurement Display/ record active/ apparent/ reactive energies, and record the average/ max/ min values of measured instantaneous values.
  • Page 12 1.2 Features This is a digital Power Clamp Meter that can be used for various wiring systems. Measured data can be saved either in the internal memory or SD card, and can be transmitted to PC via USB connection or by using SD card reader.

  • Page 13: Measuring Procedure

    1.3 Measuring Procedure ● Steps for measurement Ensuring your safety See “Safety warnings”. Preparation See “Section 3: Getting started”. Basic / Measurement / Save Settings See “Section 4: Setting”. Wiring See “Section 5: Wiring”. * Measuring instantaneous values : “Section 6: Instantaneous value Measurement” * Measuring integration values: “Section 7: Integration value Measurement”...

  • Page 14: Outline Of Max Demand Measurement Concept

    1.4 Outline of max demand measurement concept In some countries, large consumers of electricity will usually have a maximum demand contract with the power company. Such contract varies from country to country. The following is an explanation of a typical Japanese maximum demand contract. ●...
  • Page 15 KEW6305...

  • Page 16: Instrument Layout

    2. Instrument Layout 2.1 Front view Display (LCD) / Keys Display (LCD) Keys LED status indicator Green lights up : Recording & measuring Green blinks : Stand-by mode (lights up when preset rec. start time comes) Red blinks : Charging batteries KEW6305...

  • Page 17: Key Functions

    Key functions LED status indicator Green lights up : Recording & measuring Green blinks : Stand-by mode Red lights up : Recording error Function switch: Power on KEW6305. (Rotate to any position other than “OFF”.) Keys Details START/STOP Start/ stop integration and demand measurement. Backlight Turn on/ off the LCD backlight.

  • Page 18: Lcd Indications

    2.2 LCD indications < All symbols to be displayed on the LCD > Voltage range Current range Wiring system Unit Phase number KEW6305...
  • Page 19 < Symbols indicate the functions or status during measurement > Symbols Functions and status during measurement Lights up when the keys are locked. Lights up when voltage exceeds a certain condition. Lights up when current exceeds a certain condition. Lights up when instruments is working by AC power supply. Lights up when instruments is working by batteries.

  • Page 20: Connector Descriptions

    2.3 Connector Descriptions Voltage Input Terminal (VN, V1, V2, V3) Current Input Terminal (A1, A2, A3,) Terminal Cover Power Connector Wiring configuration Voltage Input Terminal Current Input Terminal Single-phase 2-wire VN, 1 1P2W(1ch) Single-phase 2-wire (2ch) VN, 1 A1, 2 1P2W(2ch) Single-phase 2-wire (3ch) VN, 1...
  • Page 21 2.4 Side face Descriptions < When the Connector cover is closed. > SD Card Cover USB Port Cover < When the Connector cover is opened. > SD Card Slot USB Port KEW6305...

  • Page 22: Getting Started

    3. Getting started 3.1 Power Supply 3.1.1 Battery KEW6305 operates with either an AC power supply or batteries. Capable of performing measurements in the event of AC power interruption, power to the instrument is automatically restored by the batteries installed in the instrument. Dry-cell batteries (alkaline) and rechargeable batteries (Ni-MH) can be both used.
  • Page 23 Power supply indicator Symbol of power supply changes as follows. AC power supply-operated Battery-operated Battery condition Battery symbol varies as follows according to the battery condition. Battery operating time For approx. 15 hours, with new alkaline batteries. * It is reference time and will be shortened if using the backlight or Bluetooth function.
  • Page 24 3.1.2 AC Power supply Check the followings before connecting the Power cord. DANGER ● Use only the Power cord supplied with this instrument. ● Connect the Power cord mains plug to a mains socket outlet. The mains supply voltage must not exceed AC240V.

  • Page 25: Voltage Test Leads And Clamp Sensor Connection

    3.2 Voltage test leads and Clamp sensor connection Check the followings before connecting the test leads and sensors. DANGER ● Use only the Voltage test leads supplied with this instrument. ● Use the dedicated Clamp sensor for this instrument, and confirm that the measured current rating of the Clamp sensor is not exceeded.

  • Page 26: Startup Screen

    3.3 Start KEW6305 3.3.1 Start-up Screen KEW6305 gets started when rotating and setting the Function switch to any position other than “OFF” position. Then, the Start-up screen will be displayed. All the segments will be displayed for about 1 sec., and then MODEL/VERSION info will be displayed for about 1 sec..

  • Page 27: Error Message

    3.3.2 Error message This instrument automatically checks the internal circuit immediately after it is turned on. When a failure in the internal circuit is suspected, the error screen below will be displayed for about 2 sec. prior to the start-up screen. In case that following screen appears, stop using the instrument immediately and refer to “Section12: When defect or breakdown is suspected”...

  • Page 28: List Of Setting Items

    4. Setting 4.1 List of setting items This section deals with settings for measurement and data saving. Set the Function switch to SET UP range as follows. Setting no./ item Symbol Details 1P2W(1ch)/ 1P2W(2ch)/ 1P2W(3ch) Wiring system / 1P3W/ 3P3W/ 3P3W3A/ 3P4W Voltage range 150/ 300/ 600V Clamp sensor...
  • Page 29 Time period setting Year:Month:Day:Hour:Minute:Second Date setting Start of continuous Year:Month:Day:Hour:Minute:Second measurement End of continuous Year:Month:Day:Hour:Minute:Second measurement Value : 0.1 - 999.9 Target demand Unit: W/kW/MW/GW/VA/kVA/MVA/GVA Demand NO/ 10/ 15/ 30 min measure- * Demand measurement will not be performed ment cycle when “NO”...
  • Page 30 4.2 Setting procedure of each setting item “ Setting 01” Wiring system Following explains how to make settings for wiring system. Select the appropriate wiring system according to the environment to be measured. 1P2W(1ch) : Single-phase 2-wire (1ch) 1P2W(2ch) : Single-phase 2-wire (2ch) 1P2W(3ch) : Single-phase 2-wire (3ch) Setting item...
  • Page 31 “Setting 02” Voltage rang Selecting a measurement range so that the estimated inputs will be close to the full scale value is recommended to obtain accurate results. Recommended range selections are: 150V range for rated voltages between 100 - 120V, 300V range for 200 - 240V and 600V range for 400 – 440V. Setting item 150V / 300V / 600V Default value (or after system reset)
  • Page 32 “Setting 03” Clamp sensor Selectable Current range (“Setting 04”) differs by the selected Clamp sensors. Clamp sensor Current range (” Setting 04 ”) 50A (M-8128) 1 / 5 / 10 / 25 / 50A / AUTO 100A (M-8127) 2 / 10 / 20 / 50 / 100A / AUTO 200A (M-8126) 4 / 20 / 40 / 100 / 200A / AUTO 500A (M-8125)
  • Page 33 “Setting 04” Current range Selectable Current range differs by clamp sensor selected at “Setting 03”. Clamp sensor (“Setting 03”) Current range 50A (M-8128) 1 / 5 / 10 / 25 / 50A / AUTO 100A (M-8127) 2 / 10 / 20 / 50 / 100A / AUTO 200A (M-8126) 4 / 20 / 40 / 100 / 200A / AUTO 500A (M-8125)
  • Page 34 “Setting 05” VT ratio For the detailed information about VT ratio, please refer to “5-3 VT/CT ratio” in this manual. Setting range 0.01 - 9999.99 (can be set by 0.01) Default value (or after system reset) 1.00 1 Use the Cursor key on the selection screen, and select “Setting 05”.
  • Page 35 “Setting 06” CT ratio For the detailed information about CT ratio, please refer to “5-3 VT/CT ratio” in this manual. Setting range 0.01 - 9999.99 (can be set by 0.01) Default value (or after system reset) 1.00 1 Use the Cursor key on the selection screen, and select “Setting 06”.
  • Page 36 “Setting 07” Time setting 1 Use the Cursor key on the selection screen, and select “Setting 07”. 2 Press the ENTER key to get the instrument into setting change mode. 3 Then second is forcefully changed to “00” and starts blinking. Select the time parameter to be changed with Left &...
  • Page 37 “Setting 08” Buzzer setting 1 Use the Cursor key on the selection screen, and select “Setting 08”. 2 Press the ENTER key to get the instrument into setting change mode. 3 Present setting (or default value: on) blinks. Press the Cursor key to select “on”...
  • Page 38 “Setting 09” Recording interval Following explains how to set the recording interval for integration/ demand measurement. The recording interval is a time distance to record each measurement data into SD Card or internal memory. 1 / 2 / 5 / 10 / 15 / 20 / 30 sec., Setting time 1 / 2 / 5 / 10 / 15 / 20 / 30 min., 1 hour...
  • Page 39 “Setting 10” Specific time period rec. or endless rec. 1 Use the Cursor key on the selection screen, and select “Setting 10”. 2 Press the ENTER key to get the instrument into setting change mode. 3 Present setting (or default value: OFF) blinks. Press the Cursor key to select “ON”...
  • Page 40 “Setting 11” Time period setting (Time setting) Following explains how to set recording start / stop time. 1 Use the Cursor key on the selection screen, and select “Setting 11”. 2 Press the ENTER key to get the instrument into setting change mode. 3 Then second for recording stop time will blink.
  • Page 41 “Setting 12” Time period setting (Date setting) Following explains how to set recording start / stop date. 1 Use the Cursor key on the selection screen, and select “Setting 12”. 2 Press the ENTER key to get the instrument into setting change mode. 3 Then day for recording stop date will blink.
  • Page 42 “Setting 13” Start of continuous measurement 1 Use the Cursor key on the selection screen, and select “Setting 13”. 2 Press the ENTER key to get the instrument into setting change mode. On the LCD, time (Setting. 07);1 min. put forward on, is displayed and second will blink. 3 Change the time and date with Cursor Key.
  • Page 43 “Setting 14” Stop of continuous measurement 1 Use the Cursor key on the selection screen, and select “Setting 14”. 2 Press the ENTER key to get the instrument into setting change mode. On the LCD, measurement start time (Setting 13) + 1 hour, is displayed and second will blink. 3 Change the time and date with Cursor Key.
  • Page 44 “Setting 15” Target demand For details about demand target value, please refer to “Section 8”: Demand measurement. Target value can be selected between 0.1W and 999.9GW. Value Unit Demand target value 0.1 - 999.9 W / kW / MW / GW (can be set by 0.1) VA / k VA / M VA / G VA Default value (or after...
  • Page 45 “Setting 16” Demand measurement cycle Demand measurement cycle is to be used for calculating demand values. Setting time NO / 10 / 15 / 30 min Default value (or after system reset) 30 min * Demand measurement will not be performed when “NO” has been selected. 1 Use the Cursor key on the selection screen, and select “Setting 16”.
  • Page 46 “Setting 17” Demand warning cycle The buzzer will sound when a predicted demand value exceeds a target demand value during demand measurement. For further details, please refer to “Section 8”: Demand measurement. According to the demand measurement interval, which has been set at Setting 16, warning cycle can be set to as follows.
  • Page 47 “Setting 18” Available space in SD card Following explains how to check the available space in SD card. 1 Use the Cursor key on the selection screen, and select “Setting 18”. 2 Then the available space in the SD card in KEW6305 will be displayed. (0 – 100%, displayed by 1%) * Bars (“----“) will be displayed if SD card is not inserted.
  • Page 48 “Setting 19” SD card Format Newly purchased SD Card must be formatted before use. For details about SD Card, please refer to “Section 9: SD Card / Internal memory” in this manual. CAUTION Ensure that the Function switch is set to “OFF” position before placing / removing an SD Card.
  • Page 49 “Setting 20” Available space in Internal memory Following explains how to check the available space in the internal memory. 1 Use the Cursor key on the selection screen, and select “Setting 20”. 2 Then the available space in the internal memory of KEW6305 will be displayed. (0 – 100%, displayed by 25%) NOTE: The max number of files that can be saved in the internal memory is four.
  • Page 50 “Setting 21” Internal memory Format 1 Use the Cursor key on the selection screen, and select “Setting 21”. 2 Then press the ENTER key to get the instrument in setting change mode. 3 The message “OFF”(not format) will blink. Change it to “ON”(format) with Cursor key.
  • Page 51 “Setting 22” System reset Following explains how to perform system reset to restore all the settings to the default. For further details about system reset, please refer to “Section 11: Additional functions” in this manual. 1 Use the Cursor key on the selection screen, and select “Setting 22”. 2 Then press the ENTER key to get the instrument in setting change mode.
  • Page 52 “Setting 23” ID number Setting range 00-001 - 99-999 Default value (or after system reset) 00 - 001 1 Use the Cursor key on the selection screen, and select “Setting 23”. 2 Press the ENTER key to get the instrument into setting change mode. 3 The rightmost digit of present setting (or default value: 1.00) blinks.
  • Page 53 “Setting 24” Setting read Following explains how to load the settings saved at “Setting 25”. Please refer to “Setting 25” in which shows how to save the setting. 1 Use the Cursor key on the selection screen, and select “Setting 24”. 2 Press the ENTER key to get the instrument into setting change mode.
  • Page 54 “Setting 25” Setting save Following explains how to save the settings items. Seven items below can be saved. Making necessary settings on following 7 items, and saving them. Then it can be loaded from Setting 24 from the next time. Selectable number: 01 - 20 Setting no.
  • Page 55 “Setting 26” Bluetooth 1 Use the Cursor key on the selection screen, and select “Setting 26”. 2 Press the ENTER key to get the instrument into setting change mode. 3 Present setting (or default value: OFF) blinks. Press the Cursor key to select “ON”...
  • Page 56 “Setting 27” V / A range Auto-setting Following explains how to activate auto-setting for Voltage range (Setting 02), Clamp meter (Setting 03), Current range (Setting 04). 1 Select the appropriate wiring configuration at Setting 01. 2 Connect the instrument to the circuit under test. 3 Use the Cursor key on the selection screen, and select “Setting 27”.
  • Page 57 4.30 KEW6305...

  • Page 58: Wiring Configurations

    5. Wiring configurations 5.1 Important Preliminary checks DANGER ● Do not make measurements on a circuit in which the electrical potential exceeds AC600V. ● Connect the Power cord to a socket outlet. Never connect it to the socket outlet of AC240V or more.
  • Page 59 5.2 Basic wiring configurations ● Wiring method for single-phase 2-wire (1ch) “1P2W (1ch)” Source Load ● Wiring method for single-phase 2-wire (2ch) “1P2W (2ch)” Source Load１ Load２ ● Wiring method for single-phase 2-wire (3ch) “1P2W (3ch)” Load１ Source Load２ Load 3 KEW6305...
  • Page 60 ● Wiring method for single-phase 3-wire “1P3W” Source Load VN V1 ● Wiring method for three-phase 3-wire “3P3W” Source Load ● Wiring method for three-phase 3-wire “3P3W3A” Source Load V3 A1 ● Wiring method for three-phase 4-wire “3P4W” Source Load V3 A1 KEW6305...
  • Page 61 5.3 Using supplementary VT/ CT’s (not supplied with the instrument) DANGER ● Never make measurement on a circuit in which electrical potential exceeds AC600V. ● Connect the Power cord to a socket outlet. Never connect it to the socket outlet of AC240V or more.

  • Page 62: Wiring Check

    5.4 Wiring check This instrument has Wiring check function to check the connections in order to prevent incorrect connections. 5.4.1 Check procedure 1 Rotate the Function switch to “WIRING CHECK” position. (Ensure that necessary Voltage test leads/ Clamp sensors are connected to the instrument/ circuit under test.) 2 Press the ENTER Key.

  • Page 63: Displayed Contents

    Move the cursor on the line showing an error, and press the ENTER Key. Then the suspected error value will be displayed on the LCD. In this case, orientation of sensor (A3) may be incorrect. 5.4.2 Displayed contents Selectable display screens at WIRING CHECK range are as follows. Press the Cursor keys to switch following screens.
  • Page 64 5.4.3 Criteria of judgment System to be checked Error Check item Criteria of Judgment 3P3W3 message 3P4W 3P3W 1P3W 1P2W-31P2W-21P2W-1 Should be 45Hz or more. Frequency Err.Lo_Hz Should be 65Hz or less. Err.Hi_Hz Should be 60% or more of (V range x Voltage Err.Lo_V VT ratio).

  • Page 65: Possible Causes Of Errors

    5.4.4 Possible causes of errors Check Possible cause Frequency - Voltage clip is firmly connected to the DUT? - Measuring too high harmonic components? Voltage input - Voltage clip is firmly connected to the DUT? - Voltage test leads are firmly connected to the Voltage input terminal on the instrument? Voltage balance - Settings are matched with the wiring system under test?

  • Page 66: Instantaneous Value Measurement

    6. Instantaneous value measurement Set the Function switch to range. ● Indications Measurement/Calculation parameter Unit Voltage (RMS) Vi : Voltage per phase(V1,V2,V3) Current (RMS) Ai : Current per phase(A1,A2,A3) Active power P : Total active power Pi : Active power per phase Polarity: (no mark) consumption, - (minus) regenerating Reactive power Q : Total reactive power...
  • Page 67 ● Prior to making a measurement Ensuring your safety See “Safety warnings”. See “Section 3: Turning on the instrument Preparation for measurement”. Basic settings See “Section 4: Settings”. Wiring See “Section 5: Wiring”. Instantaneous value measurement ● Basic settings “Setting 01” Wiring “Setting 02”...
  • Page 68 ● Keys Description START/STOP No use BACKLIGHT Switches on/off the backlight of the LCD. UP cursor Changes the display contents. Selects the row to be changed while in custom display mode. DOWN cursor Changes the display contents. LEFT cursor Selects the parameter (V, A etc.) to be displayed while in custom RIGHT cursor display mode Selects/ Enters custom display mode.
  • Page 69 6.1 Wiring Configuration display screen The start-up screens (or the screen after system reset) corresponding to each wiring configuration are listed below. When turning the Function switch from “OFF” to range, the following measurement screen appears. e.g. Three-phase 4-wire (Screen 1-A) Screen 1-A (*) Screen A Upper : V...
  • Page 70 ● Single-phase 3-wire “1P3W”, Three-phase 3-wire “3P3W” (13 screens) Screen A Screen B Screen C Screen D Screen E Screen F Screen G Upper － － － － Screen 1 Middle Lower Upper － － － － Screen 2 Middle Lower Upper －...
  • Page 71 6.2 Selecting/changing the display screen The display screens are classified as follows. Following table is also used in section “6-3 Customizing the display”. Screen A Screen B Screen C Screen D Screen E Screen F Screen G Screen Screen Screen Screen Screen 1 －...
  • Page 72 ● Selecting display screens Screen3-A Screen 1-A Screen 1-D Screen 1-A Screen 1-D Screen 1-B Screen 1-C Screen 2-A Screen 2-C Screen 2-D Screen 2-B Screen 2-D Screen 2-A Screen 3-C • • • Screen 3-G Screen 3-A Screen 3-G Screen 3-A Screen 3-B Screen 3-F...
  • Page 73 ● Display examples The following are examples of displays with three-phase 4-wire configuration. _１-Ａ_ _１-Ｂ_ _１-Ｃ_ _２-Ａ_ _２-Ｂ_ _２-Ｃ_ _３-Ａ_ _３-Ｂ_ _３-Ｃ_ KEW6305...

  • Page 74: Customizing The Display

    6.3 Customizing the display The displayed parameters in the upper/middle/lower rows of Screen 1 and 2 can be customized. Screen 3 cannot be customized. ● Example Before customizing (*) After customizing Displayed Upper V : Voltage : Active power Middle A : Current PF : Power factor Lower...
  • Page 75 ● Customizing Press the ENTER key either on Screen 1 or 2, to enter into custom display mode. Parameter displayed in upper row {eg. initial value: Screen1/ V(Voltage), Screen 2/P(Active power) } will flicker. Select the row to be customized using the UP or DOWN cursor key and the parameter to be selected with LEFT or RIGHT cursor...
  • Page 76 6.4 Saving data (instantaneous values) Pressing the SAVE key on range during a measurement saves all the measured parameters at the instant of saving. This is a manual single step operation. Data can be saved to either below two locations: * SD card : Max.
  • Page 77 Each time the SAVE key is pressed; the measured data is saved in the same file. To save the data into an other file (only when SD card is used), press the SAVEkey again on range. Then repeat the saving procedure.
  • Page 78 6-4-3 Parameters recorded ● Parameters saved (depending on each wiring configuration) Following parameters are saved. Measurement/ calculation parameter Voltage (RMS) Vi : Voltage per phase Current (RMS) Ai : Current per phase Active power P : Total active power Pi : Active power per phase Reactive power Q : Total reactive power Qi : Reactive power per phase...
  • Page 79 ● Example After downloading the file (SD card or internal memory), if the file is opened with a spreadsheet application software( using KEW format, eg Microsoft Excel), the spreadsheet will be as follows: model”6305” FILE ID 6305 Software version VERSION 1_01 SERIAL NUMBER 01234567...
  • Page 80 6-5 Ranges and Over-range indication 6-5-1 Ranges The settings determine the range for each measurement parameter, namely: Voltage range (“Setting 02”), Current range (“Setting04), VT ratio (“Setting 05”) and CT ratio (“Setting 06”). (Fixed range) ● Voltage V: V(average of each phase), V1/V2/V3 (each phase), max 4 digits 150 / 300 / 600V range Voltage range x VT ratio x 120% Digit &...
  • Page 81 ● Active power P/ Reactive power Q/ Apparent power S : P1 / P2 / P3, Q1 / Q2 / Q3, S1 / S2 / S3 , max 4 digits : P, Q, S (total), max 5 digits Power (*) x VT ratio x CT ratio x 120% Digit &...
  • Page 82 6-5-2 Over-range indication/ Bar indication WARNING ● When the over-range indication appears on the maximum chosen range, this means that the input exceeds the maximum allowable input for the instrument. Never apply such an input to the instrument. ● When a measured value exceeds the maximum allowable input, the use of VT/CT’s is recommended. Refer to “5-3 VT/ CT”...
  • Page 83 ● Bar indication The calculations and measurements performed by this instrument are based on the voltage and frequency of V1. If the value of V1 is less than 5% of the chosen range or if the frequency is not within 20 - 70Hz, all the parameters (except for current ) cannot be computed and thus displayed.

  • Page 84: Integration Value Measurement

    7. Integration value measurement Set the Function switch to range. LED status indicator If the Function switch is set to the any other position during integration measurement or stand-by mode, the following happens; range : Confirms instantaneous values. (see “Section 6: Instantaneous value measurement”) DEMAND range: No effect SET UP...
  • Page 85 ● Prior to making a measurement See “Safety warnings”. Ensuring your safety See “Section 3: Turning on the instrument Preparation for measurement”. See “Section 4: Setting”. Basic setting See “Section 5: Wiring”. Wiring See “Section 6: Confirm the Instantaneous value measurement”. instantaneous value Setting for integration See “Section 4: Setting”.
  • Page 86 ● Keys Description Pressing this key starts/stops integration measurement START/STOP manually or automatically. BACKLIGHT Switches on / off the backlight of the LCD. UP cursor Changes the display contents. DOWN cursor LEFT cursor Changes the display contents. RIGHT cursor Resets the integration value. ENTER Confirms the deletion of a file in the internal memory.
  • Page 87 7-1 Survey initiation There are two ways of starting a survey. (1) Manual operation Pressing START/STOP key on range for 2 sec. or more starts measurement. (2) Automatic operation (presetting the time and date) SET UP range (“Setting 10”), and then press Set the start time and date on the START/STOP key on...
  • Page 88 ● Automatic measurement at a preset time and date SET UP Preset the start time and date on range. Set the Function switch to range, and press the START/STOP key. The file number screen is displayed for about 1 sec. (a file is opened), followed by the measurement screen.
  • Page 89 7.2 Survey closure There are two ways of closing a survey. (1) Manual operation Pressing START/STOP key on range for 2 sec. or more closes the survey. This action also closes a survey started automatically at a preset time and date. LED status indicator goes off. The survey is then closed.

  • Page 90: Changing Displays

    7-4 Changing displays Displays can be changed as follows with the Cursor keys. The parameters displayed vary depending on each wiring configuration chosen. Each calculated parameter, although not displayed on the screen, is actually being computed. ● Changing the display (Three-phase 4-wire configuration) ：...

  • Page 91: Saving Data

    ● Indications on each wiring configuration The following messages are displayed on the screen according to each wiring configuration. Displayed contents Setting 01”） “ Wiring（ Displayed at Screen1 Screen2 Screen3 Screen4 Upper TIME 1P2W (1ch) Middle Lower 1P2W (2ch) Upper TIME TIME TIME...
  • Page 92 NOTE * Never set the Function switch to OFF position during a survey otherwise the survey may be lost. * The file number becomes “001” when; (1) when the file number has exceeded 999 (2) after system reset * If the same file no. exists, the old one will be overwritten. 7.5.2 Limitations of saving ●...
  • Page 93 7.5.3 Parameters Recorded Depending on the wiring configuration chosen, the following parameters are recorded: ● Parameters to be saved Parameters to be saved : voltage of each phase Voltage Vi max : max. Vi values (RMS) Vi min : min. Vi values Vi avg : avg.
  • Page 94 ● File format and name Measured data is saved in KEW format, and the file name is assigned automatically. 5 O – 0 0 1 . KEW File name ： Fixed no. File no. (001 – 999) SD: SD card ME: Internal memory 1: Manual saving 2: Auto-saving (using Timer function)
  • Page 95 ● Example of measured data Model”6305” FILE ID 6305 Software version VERSION 1_01 SERIAL NUMBER 01234567 Bluetooth address MAC ADDRESS 00_11_22_33_44_55 Setting 23 ID NUMBER 00-001 CONDITION SELF Setting 01 WIRING 3P4W Setting 02 VOLT RANGE 300V Setting 05 VT RATIO 1.00 Setting 03 SENSOR TYPE...
  • Page 96 7.6 Displayed Digits/ Over-range indication ● Digits * Active electrical energy WP, Apparent electrical energy WS (auto-range) : WP1/WP2/WP3, WS1/WS2/WS3 (each phase), max 6 digits : WP, WS (total), max 6 digits The range is automatically assigned depending on the measured value. The decimal point and unit are changed automatically.
  • Page 97 7.14 KEW6305...

  • Page 98: Demand Value Measurement

    8. Demand value measurement Set the Function switch to DEMAND range. LED status indicator If the Function switch is set in the following positions during Demand measurement or Demand stand-by mode; range : The instantaneous values are displayed. (see “Section 6: Instantaneous value measurement”) range : The instantaneous values are displayed.
  • Page 99 ● Before making a measurement Ensuring your safety See “Safety warnings”. See “Section 3: Turning on the instrument Preparation for measurement”. Basic setting See “Section 4: Setting”. Wiring See “Section 5: Wiring”. See “Section 6: Confirm the Instantaneous value measurement”. instantaneous value Setting for demand See “Section 4: Setting”.
  • Page 100 ● Keys Description Pressing this key starts/stops demand START/STOP measurement manually or automatically. BACKLIGHT Switches on/off the backlight of the LCD. UP cursor Changes the display contents. DOWN cursor LEFT cursor Changes the display contents. RIGHT cursor Resets the demand value. ENTER Confirms the deletion of a file in the internal memory.

  • Page 101: Demand Measurement

    8-1 Demand measurement The following is an example of power management by monitoring the demand. ● Reducing the average power during a specific interval Assume the interval to be 30mins. In the figure below, the average power during Interval 1 is assumed to be 500kW and during Interval 2 is assumed to be 600kW.
  • Page 102 ● Demand measurement with this instrument By measuring loads, the KEW6305 can display the present and predicted average power(demand value). These values are continuously updated as time elapses during a particular interval. The buzzer will sound when a predicted demand value exceeds a target demand value after the elapse of the preset inspection cycle.
  • Page 103 ● Saving Demand values Demand values will be saved at the preset interval (Setting 09). Final demand value is determined at the end of every demand measurement cycle (Setting 16), and will be reset automatically. The maximum demand value measured during every demand cycle will be held and displayed on the LCD together with the time and date information.
  • Page 104 8-2 Changing displayed items There are 3 display screens on DEMAND range, and the screens are common to each wiring configuration. ● Screens can be changed with Cursor keys as follows. Screen 1 Upper row: Target demand value Middle row: Predicted demand value Lower row: Present demand value Screen 2 Upper row: Remaining time for demand...
  • Page 105 ● Displayed items <Screen 1, Upper row: Target demand value (W) > It is set at “Setting 15”. Set the desired value. <Screen 1, Middle row: Predicted demand value (W) > Predicted values of average electrical power (demand values) which will be after the elapse of demand measurement interval with present loads are displayed right after starting a measurement.
  • Page 106 8-3 Survey initiation There are two methods to start a survey. (1) Manual operation Pressing the START/STOP key on DEMAND range for at least 2 sec. starts measurement. (2) Automatic operation (preset time and date) Set the start time and date on SET UP range, and then press the START/STOP...
  • Page 107 ● To start measurement automatically at the preset time and date Set the start time and date on SET UP range. Then set the Function switch to DEMAND range, and press the START/STOP key. File number screen is displayed for about 1 sec., followed by the measurement screen. The instrument goes into stand-by mode for measurement.
  • Page 108 8-4 Survey closure There are two methods for closing a survey. (1) Manual operation Pressing START/STOP key on DEMAND range for at least 2 sec. stops measurement. This action also stops the measurement started automatically at a preset date and time. (2) Automatic operation (specifying the time and date) Preset the stop time and date on SET UP...
  • Page 109 8-6 Saving data When integration or demand measurement starts, the measured data will be saved automatically. There are two locations where data can be saved. * SD card : Max. 511 files can be saved. * Internal memory : Max. 4 files can be saved. Data is saved to a SD card automatically when a SD card has been inserted before turning on the instrument.
  • Page 110 8.6.2 Limitation of saving ● Limitation of saving (before starting a survey) In the following cases, a survey cannot be started (manually or automatically) by pressing the START/STOP key. < In case data is saved to SD card > * When 511 files have been saved to the SD card; mark appears and further data cannot be saved.
  • Page 111 8-6-3 Parameters recorded ● Parameters to be saved Parameters to be saved : voltage of each phase Voltage Vi max : max. Vi values (RMS) Vi min : min. Vi values Vi avg : avg. Vi values : current of each phase Ai max : max.
  • Page 112 ● Example of measured data Model”6305” FILE ID 6305 Software version VERSION 1_01 SERIAL NUMBER 01234567 Bluetooth address MAC ADDRESS 00_11_22_33_44_55 Setting 23 ID NUMBER 00-001 CONDITION SELF Setting 01 WIRING 3P4W Setting 02 VOLT RANGE 300V Setting 05 VT RATIO 1.00 Setting 03 SENSOR TYPE...
  • Page 113 8-7 Displayed Digits/ Over-range indication ●Digits *Predicted demand value (Guess), Present demand value (Present): max 6 digits The digits of the predicted and present demand values are corresponding to the target demand values listed in the table below. Target demand value Digit and decimal point (“Setting 16”) 0.1～999.9 W／VA...

  • Page 114: Sd Card/ Internal Memory

    9. SD card/ Internal memory 9-1 Instrument and SD Card/ Internal memory This instrument supports 1/ 2Gbyte SD cards. ● Max number of saved data Destination to save data SD card Internal memory Capacity Manual saving ( approx. 3.3 million results approx.

  • Page 115: Data Transfer

    Data transfer 1. SD card and USB Data in SD card or internal memory can be transferred to PC using USB connection or SD card slot/ reader. Method of transfer Card reader SD card data (file) Internal memory data (file) -------- *1: It is reccomended to transfer the data with big size by use of SD card since trasfer of such data via USB takes time.
  • Page 116 9.2 Placing / removing SD card △ DANGER ● Do not open the SD card Cover during a measurement. △ WARNING ● Ensure that Voltage test leads and Clamp sensors are removed from the instrument, and that the Function switch is set at the “OFF” position when placing/ removing SD card.
  • Page 117 KEW6305...

  • Page 118: Communication Function/ Interface Software

    10. Communication function/ Interface software 1. Introduction ● Interface This instrument is equipped with USB and Bluetooth interfaces. Communication method : USB Ver2.0 Bluetooth : Bluetooth Ver2.1+EDR (Class2) Compliant profile: SPP Following can be done by USB/ Bluetooth communication. * Downloading files in the internal memory of the instrument to a PC * Making settings for the instrument via a PC * Displaying the measured results on a PC as graphs in real-time, and also saving the measured data at the same time...
  • Page 119 2. Installing the “KEW Windows for KEW6305” (1) Followings shall be checked before installing the software. * To prepare your system to install this software, please close all open programs. * Be sure NOT to connect the instrument with a USB until installation completes. * Installation shall be done with Administrative right.
  • Page 120 (6) Click “Finish” when “InstallShield Wizard Complete” dialogue box appears. (7) When above installation wizard completes, subsequent installation initiates automatically. If you rebooted your PC at step (5), double click CD drive at My computer to show the following window. (8) Repeat above step (3) through (6) and completes the installation.

  • Page 121: Installing The Usb Driver

    3. Installing the USB driver How to install the USB driver (for Windows 7/ Vista) (1) When the KEW Windows for KEW6305 has been successfully installed in your computer, following dialogue box appears to start installing the USB driver. Click “Next”. (2) Read through and understand the End User License Agreement and click“...
  • Page 122 (3) If the Security Warning message appears, click on the “Install this driver anyway”. (It is no problem to continue installing because operation has already been verified.) (4) Installation completes when the following window appears. Click “Finish”. The USB driver been successfully installed. Power on KEW6305 first, and then connect to you PC. To restart the interrupted USB driver installation process, right click on the CD drive and click “Open”.
  • Page 123 How to install the USB driver (for Windows XP) (1) When the KEW Windows for KEW6305 has been successfully installed in your computer, following dialogue box appears to start installing the USB driver. Click “Next”. (2) Read through and understand the End User License Agreement and click“ I accept….”, and then click“...
  • Page 124 click “Next”. (7) If the Warning message appears, click “Continue Anyway”. (It is no problem to continue installing because operation has already been verified.) (8) When the installation completes, the Completing the Found New Hardware Wizard screen appears. Click “Finish”. To restart the interrupted USB driver installation process, right click on the CD drive and click “Open”.
  • Page 125 4. Starting the “KEW Windows for KEW6305” Click the “KEW WindowsV2“ icon on your desktop, or click “Start”-> “Program”-> “KEW”-> “KEW WindowsV2”. Ensure that KEW6305 gets started before connecting KEW6305 to your PC. Then start KEW WindowsV2. The main window for “KEW WindowsV2” appears. Select “KEW6305” and click “Start” or double click on the “KEW6305”...

  • Page 126: Other Functions

    11. Other functions 11.1 Getting power from measured lines When there is difficulties in getting power from an outlet, KEW6305 operates with powers on the measured line by using Voltage test leads with Power supply adapter MODEL8312. Connect the Adapter according to following procedure. Confirm that the Adapter is off.

  • Page 127: Auto-Ranging

    11.2 Auto-ranging Auto-ranging function is available at W, Wh, DEMAND and WAVE Ranges. Current values in wide range can be measured with this function; it is helpful when load capacitances vary dramatically according to day and time. ●Range: 2-range-auto/ max and min range of each Clamp sensor ●Range shift to upper one when crest values equal to twice as much as F.S (sine wave) at min range is detected.

  • Page 128: Troubleshooting

    12. Troubleshooting When defect or breakdown of the instrument is suspected, check the following points first. If your problem isn’t listed in this section, contact your local Kyoritsu distributor. Symptom Check operating with an AC power supply (1) Instrument cannot be - Power cord is connected firmly and properly? powered on.
  • Page 129 Symptom Check ● CF card is inserted correctly? (6) Data cannot be saved in a ● CF card has been formatted? CF card. ● Is there available space in a CF card? ● Destination for saving data is set to “CF card”? ●...

  • Page 130: General Specification

    13.Specification 13.1 General specification Location for use : In door use, Altitude up to 2000m Temperature & humidity range : 23ºC±5ºC, Relative humidity 85% or less (guaranteed accuracy) (no condensation) Operating Temperature & : 0ºC±40ºC, Relative humidity 85% or less humidity range (no condensation) Storage Temperature &...
  • Page 131 13.2 Inst measurement ( Range) (1) Voltage V(i) [V] Range 150/ 300/ 600V Displayed digit 4 digits Allowable input 10 to 110% of each range Display range 5 to 130% of each range Crest factor 2.5 or less Accuracy ±0.2%rdg±0.2%f.s. (sine wave, 45 - 65Hz) Input impedance approx.
  • Page 132 (5) Calculation items Apparent power S [VA] Displayed digit Same as active power. × Equation 1P2W ×1 × ×2 ， × ×3 ， ) 3 , × 1P3W ， × 3P3W ， × 3P3W3A ) 3 , ， × 3P4W ) 3 , ，...

  • Page 133: Integration Measurement

    Neutral current In [A] *only when “WIRING = 3P4W” θ θ Calculation *θ2 ： Phase difference between A1and A2 *θ3 ： Phase difference between A1and A3 13.3 Integration measurement ( Range) Active energy WP [Wh] Displayed item Consumption (Overall: , each phase: Display range 0.00Wh to 999999GWh (digit and unit will be adjusted according to...

  • Page 134: Other Specifications

    Duration of integration Displayed item 00:00:00 (hour: minute: second) Display range 00:00:00 (0 sec.) - 99:59:59 (99-hour 59-min 59-sec) to 000100 - 999999 (999999-hour) *Display changes as above. 13.4 Demand measurement ( DEMAND Range) Target value (T Display range Preset value will be displayed and not vary. (0.1W - 999.9GW) Predicted value (G Display range Decimal position and unit are the same as T...
  • Page 135 (4) Battery check function Power supply Mark Battery voltage [V] (±0.1V) AC power supply － Effective ～ 10.5 ～ 5.5V DC power supply range (battery) ( blink) Warning 5.5V or less * KEW6305 operates with an AC power supply if it is connected to. (5)Recording data Internal memory Memory...
  • Page 136 13.6 Specification of Clamp sensor < MODEL8128 > < MODEL8127 > < MODEL8126 > Rated current AC 5Arms AC 100Arms AC 200Arms (max rating: AC50Armns) (141Apeak) (283Apeak) Output voltage 0 ~ 50Arms (AC 50mV/AC 5A) AC0 ~ 500mV AC0 ~ 500mV (AC 500mV/AC50A) (AC500mV/AC100A) : 5mV/A (AC 500mV/AC200A) : 2.5mV/A...
  • Page 137 < MODEL8125 > < MODEL8124 > < KEW8129 > AC 500Arms (707Apeak) AC 1000Arms (1414Apeak) AC 300/1000/3000 Arms 300A Range : AC500mV/AC300A(1.67mV/A) AC0 ~ 500mV AC0 ~ 500mV 1000A Range : AC500mV/AC1000A(0.5mV/A) (AC500mV/500A) : AC 1mV/A (AC500mV/1000A) : 0.5mV/A 3000A Range : AC500mV/AC3000A(0.167mV/A) 300A Range : 30 ~ 300Arms (424Apeak)
  • Page 138 DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations. 5-12 92-2107...

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