Panasonic Eco-POWER METER KW1M User Manual
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Panasonic Eco-POWER METER KW1M User Manual

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Summary of Contents for Panasonic Eco-POWER METER KW1M

  • Page 2 【KW1M】 Basic setting to measure by Eco-POWER METER When wiring the main unit and the current transformer (CT) and setting the basic setting after power on, you can measure the power The basic setting of MODE1 is necessary to measure. In order to use the other functions, the settings of the each parameter are necessary.

  • Page 3: Copyright And Trademark

    Copyright and trademark ● Panasonic Industry Co., Ltd. owns the copyright of this manual. ● We stiffly refuse the reproduction of without permission from this manual. ●Modbus Protocol is a communication protocol that the Modicon Inc. developed for PLC.
  • Page 4 Introduction Thank you very much indeed for purchasing “KW1M Eco-POWER METER”. In this manual, we explain the usage of “KW1M-H Eco-POWER METER” in detail. Please use it correctly after understanding the content enough.

  • Page 5: Table Of Contents

    Table of Contents Chapter 1 Unit’s Features and Structure ....................1 1.1 Unit’s Name and Model Numbers ......................1 1.1.1 Main unit ............................1 1.1.2 Option ............................. 1 1.2 Measurement items: AKW1111/AKW1111B (400VAC applicable type) ..........2 1.3 Measurement items: AKW1110/AKW1110B ................... 2 Chapter 2 Parts Name and Working ......................
  • Page 6 Chapter 7 Communication........................35 7.1 Communication Procedures ........................35 7.2 Communication timing ........................... 35 7.3 MEWTOCOL Communication ........................ 36 7.3.1 Overview of MEWTOCOL-COM (RS485) ..................36 7.3.2 Data Register List <AKW1111/AKW1111B (400AC applicable type)> ........37 7.3.3 Data Register List <AKW1110/AKW1110B> ................38 7.3.4 Error Codes ..........................

  • Page 7: Cautions Before Using

    Cautions before using ■ Installation environment ◇Do not use the Unit in the following environments. ・Where the unit will be exposed to direct sunlight and where the ambient temperature is outside the range of -10 to 50 °C. ・Where the ambient humidity is outside the range of 30 to 85 % RH (at 20℃, non-condensing) and where condensation might occur by sudden temperature changes ・Where inflammable or corrosive gas might be produced ・Where the unit will be exposed to excessive airborne dust or metal particles...
  • Page 8 ■ Power supply ・Connect a breaker to the voltage input part for safety reasons and to protect the device. The breaker that connects to the voltage input part must arrange at the position easily reached, and display shows it is the breaker of the equipment. ・Do not turn on the power supply or input until all wiring is completed.

  • Page 9: Chapter 1 Unit's Features And Structure

    KW1M Eco-POWER METER Chapter 1 Unit’s Features and Structure KW1M Eco-POWER METER is the suitable size wattmeter for installing in a control board. It measures electrical power, voltage, current and so on using AC voltage and AC current input. It also works ad an hour meter, which is measured power-on or power-off time. 1.1 Unit’s Name and Model Numbers 1.1.1 Main unit Measured voltage...

  • Page 10: Measurement Items: Akw1111/Akw1111B (400Vac Applicable Type)

    KW1M Eco-POWER METER Others Product name Model No Mounting rail AT8-DLA1 Fastening plate ATA4806 Mounting frame AKW1822 1.2 Measurement items: AKW1111/AKW1111B (400VAC applicable type) Item Unit Data range kWh/ 0.00 to 9999.99MWh Integral electric power (Active) (9-digit display) 0.00 to 9999999.99kWh Instantaneous electric power (Active) 0.00 to 9999.99 R-current...

  • Page 11: Chapter 2 Parts Name And Working

    KW1M Eco-POWER METER Chapter 2 Parts Name and Working 2.1 Parts Names ①MODE indicator Lighting when mode setting ②LOCK indicator Lighting while in lock mode ③OP. output indicator Lighting when pulse output ④Mode display Display mode in setting and measurement item with 16-seg ⑤Display each value With 7-seg ・Display each measured value...

  • Page 12: Chapter 3 Wiring

    KW1M Eco-POWER METER Chapter 3 Wiring 3.1 AKW1111/AKW1111B (400V AC applicable type) Be sure to wire correctly according to the terminal arrangement and wiring diagrams. After completing wiring, be sure to attach the terminal cover for safety reasons. 3.1.1 Terminal arrangement M3 screw Function Screw...
  • Page 13 KW1M Eco-POWER METER Single-phase three-wire / Three-phase three-wire system *Two current transformers are required. Do not wire ⑥ terminals. They are connected internal. Three-phase four-wire system *Three current transformers are required. ◆When measuring a load with exceed input voltage Voltage transformer (VT) is needed when you measure a load with over rated input voltage (440V). Use VT, those secondary rating is 110V.

  • Page 14: Akw1110/Akw1110B

    KW1M Eco-POWER METER 3.2 AKW1110/AKW1110B Be sure to wire correctly according to the terminal arrangement and wiring diagrams. After completing wiring, be sure to attach the terminal cover for safety reasons. 3.2.1 Terminal arrangement Function Screw ① Power supply ② ③...

  • Page 15: Wiring Diagrams

    KW1M Eco-POWER METER 3.2.2 Wiring Diagrams Please connect a breaker (3 to 15A) to the voltage input part for safety reasons and to protect the device. Grounding the secondary side of VT (Voltage transformer) and CT (Current transformer) is not necessary with low-voltage circuit.

  • Page 16: Caution For Wiring

    KW1M Eco-POWER METER 3.3 Caution for Wiring 1) Terminal fastening torque should be 0.5 to 0.6N･m for M3 screw and should be 1.0N･m for M3.5 screw. In case of using a crimping terminal, use it with insulating sleeve applicable to M3 screw or M3.5 screw.

  • Page 17: How To Attach The Current Transformer (Ct)

    KW1M Eco-POWER METER 3.4 How to attach the Current Transformer (CT) ・One current transformer (CT) is needed to measure 1P2W system. Two CTs are needed to measure a 1P3W/3P3W system. Three CTs are needed to measure a 3P4W system. Using all CT should be the same.

  • Page 18: For Input Connection

    KW1M Eco-POWER METER Without Ammeter Power supply Breaker Shorted or resistor less than 0.1Ω Secondary current CT with 2nd current 5A Eco-POWER METER Dedicated CT for 5A Load 3.5 For input connection ・Contact input Use highly reliable metal plated contacts. Since the contact’s bounce time leads directly to error in the count value, use contacts with as short a bounce time as possible.

  • Page 19: For Output Connection

    KW1M Eco-POWER METER (Fig.B) No Good example Operating power supply Operating power supply Measured voltage input Measured voltage input Insulated Input equipment Input equipment Auto transformer transformer (sensor etc.) (sensor etc.) (＋) (＋) (－) (－) Eco-POWER Eco-POWER METER METER Do not use an auto-transformer. Do not ground the secondary side.

  • Page 20: Low Voltage Directive

    KW1M Eco-POWER METER Recommended Cable Use the transmission cables shown below for Eco-POWER METER RS485 communication system. Conductor Insulator Cable Resistance Cable Applicable cable Size Material Thickness diameter (at 20℃） HITACHI 1.25 mm KPEV-S Max. Approx. (AWG16) Max.16.8Ω/km Polyethylene ×1P 0.5 mm 8.5 mm 1.25 mm...

  • Page 21: Chapter 4 Setting

    KW1M Eco-POWER METER Chapter 4 Setting 4.1 Operation procedure AKW1111/AKW1111B (400VAC applicable type) 【Basic setting to measure】 When wiring Eco-POWER METER and CT and setting mode 1 after power on, Eco-POWER Meter can measure the electric power. In order to use the other functions, set mode2, 3 and 4 according to your use.
  • Page 22 KW1M Eco-POWER METER Mode 2…Mode for setting of each parameter for pulse measurement Mode 3…Mode for setting of each parameter for serial communication Mode 4…Mode for setting of each parameter for optional function Monitor (Display when power on) <MODE> Setting mode (Mode 1) (Mode 2) (Mode 3)

  • Page 23: Akw1110/Akw1110B

    KW1M Eco-POWER METER 4.2 Operation procedure AKW1110/AKW1110B 【Basic setting to measure】 When wiring Eco-POWER METER and CT and setting mode 1 after power on, Eco-POWER Meter can measure the electric power. In order to use the other functions, set mode2, 3 and 4 according to your use.
  • Page 24 KW1M Eco-POWER METER Mode 3…Mode for setting of each parameter for serial communication Mode 4…Mode for setting of each parameter for optional function Monitor (Display when power on) <MODE> Setting mode (Mode 1) (Mode 3) (Mode 4) <SET> <SET> <SET> Refer to the previous Protocol setting mode Auto-off setting mode...

  • Page 25: Setting Mode Explanation

    KW1M Eco-POWER METER 4.3 Setting Mode Explanation ■The value with under line is initial setting among each setting value. ☆Set before measurement. Press <MODE> and <SET> at a time, the setting will be initialized. 4.3.1 MODE1(Mode for setting each parameter for power measurement.) Phase/Wire system setting mode SYST Mode defines phase and wire system to measure.
  • Page 26 KW1M Eco-POWER METER Unit for pulse output setting mode PL-P Mode defines unit used for pulse output. It defines the unit of integral electric power for 1-pulse output. ・Select from 0.001/0.01/0.1/1/10/100kWh /AL-P/AL-C/AL-S/Cnt. *“AL-S” and “Cnt” are only for AKW1111/AKW1111B. When one of the “0.001/0.01/0.1/1/10/100” [kWh] is set, one pulse is output at reaching the setting value.
  • Page 27 KW1M Eco-POWER METER Mode1 Setting flow chart Monitor ↓<MODE> (MODE 1 Lighting) ↓ <SET> Phase/Wire system setting mode Press <ITEM/△><SHIFT/▽> to change Single-phase 2-wire ⇔ Single-phase 3-wire ⇔ Three-phase 3-wire ⇔ Three-phase 4-wire. 3P4W(*) 1P2W 1P3W 3P3W *only AKW1111/AKW1111B ↓<SET> CT type setting mode Press <ITEM/△><SHIFT/▽>...
  • Page 28 KW1M Eco-POWER METER Current for time measurement setting mode Set ratio of current for time measurement using <ITEM/△><SHIFT/▽>. If you measure the current over 50.0%F.S., set to “50.0”. (1.0 to 100.0) ↓<SET> Cutoff current setting mode Set cutoff current ratio using <ITEM/△> <SHIFT/▽>. If you don’t measure the current under 10.0%F.S, set to “10.0”.
  • Page 29 KW1M Eco-POWER METER Stand-by alarm setting mode 2 *It is only when “AL-S” is selected on unit for pulse output setting mode. Set a time used for threshold value to judge stand-by power using <ITEM/△><SHIFT/▽>. ( 0 to 9999 min.) *It is only when “AL-S”...

  • Page 30: Mode2 (Mode For Setting Of Each Parameter For Pulse Measurement)

    KW1M Eco-POWER METER 4.3.2 MODE2 (Mode for setting of each parameter for pulse measurement) *Only AKW1111/AKW1111B (400VAC applicable type) Max. counting speed setting mode Mode defines max. counting speed. ・Select from 2kHz/30Hz Pre-scale setting mode PSCL Mode defines pre-scale value used for changing count value. ・It can be set the range of 0.001 to 100.000.

  • Page 31: Mode3 (Mode For Setting Of Each Parameter For Serial Communication)

    KW1M Eco-POWER METER 4.3.3 MODE3 (Mode for setting of each parameter for serial communication) Protocol setting mode PROT Mode defines communication protocol of main unit via serial communication (RS485). ・Select from MEWTOCOL / MODBUS(RTU). Station number setting mode Mode defines an individual station no. for each unit when two or more units communicate via serial communication (RS485).
  • Page 32 KW1M Eco-POWER METER Transmission speed setting mode Press <ITEM/△><SHIFT/▽> to change 19200 ⇔ 38400 ⇔ 2400 ⇔ 4800 ⇔ 9600. 19200bps 38400bps 2400bps 4800bps 9600bps ↓ <SET> Transmission format setting mode Press <ITEM/△><SHIFT/▽> to change 8bit-o ⇔ 7bit-n ⇔ 7bit-E ⇔ 7it-o ⇔ 8bit-n ⇔ 8bit-E. n: not available E: even number o: odd number...

  • Page 33: Mode4 (Mode For Setting Of Each Parameter For Optional Function)

    KW1M Eco-POWER METER 4.3.4 MODE4 (Mode for setting of each parameter for optional function) Auto-off setting mode Display LCD turns off automatically when there is no key operation for a long time. ・Off time can be set the range of 0 to 99min. “0”...

  • Page 34: Chapter 5 Various Functions

    KW1M Eco-POWER METER Chapter 5 Various Functions (Sample image is AKW1111/AKW1111B. AKW1110/AKW1110B displays same.) LOCK indicator 5.1 LOCK mode It is the mode makes all keys unable. Use when you want to fix one of the measurement displays (For all displays). In this mode, you can not input by any keys.

  • Page 35: Counter Function *Only Akw1111/Akw1111B (400Vac Applicable Type)

    KW1M Eco-POWER METER 5.3 Counter function *only AKW1111/AKW1111B (400VAC applicable type) 5.3.1 Operation mode Maintain output hold count HOLD [Output] [Counting] possible ・・・ [Addition] n: Preset value (1) Output control is maintained after count-up completion and until reset. However counting is possible despite of count-up completion.

  • Page 36: Chapter 6 Display Of Each Value

    KW1M Eco-POWER METER Chapter 6 Display of each Value 6.1 Working of Monitor Display 【Power Monitoring Mode Display】 Integral electric power ↓<ITEM/△> Instantaneous electric power ↓<ITEM/△> Current → → S-current R-current T-current <SHIFT/▽> <SHIFT/▽> Press <SHIFT/▽> to shift R-A → S-A → T-A → R-A→・・・ ↓<ITEM/△>...

  • Page 37: Power Monitoring Mode

    KW1M Eco-POWER METER 6.2 Power Monitoring mode (Sample image is AKW1111/AKW1111B. AKW1110/AKW1110B displays same.) Power on the unit and it displays the integral electric power. 6.2.1 Integral electric power ･It displays the integral electric power. Sample ・Integral electric power is measured and displayed from 0.00kWh to 9999.99MWh. ・The decimal point is changed automatically.

  • Page 38: Instantaneous Electric Power

    KW1M Eco-POWER METER 6.2.2 Instantaneous electric power ・It displays the Instantaneous electric power. Sample Instantaneous electric power (kW) 6.2.3 Current ・It displays the current value of the load. ・Press <SHIFT/▽> to change R-current and S-current (*), T-current. *only AKW1111/AKW1111B (400V AC applicable type) *Before start measuring, select phase and wire system according to the measured load.

  • Page 39: Voltage

    KW1M Eco-POWER METER 6.2.4 Voltage ・It displays the voltage value of the load. ・Press <SHIFT/▽> to change voltage between R(RS)-voltage(*) and T(TS)-voltage. *only AKW1111/AKW1111B (400V AC applicable type) *Before start measuring, select phase and wire system according to the measured load. When it sets wrong, it doesn’t measure correctly.

  • Page 40: Electricity Charge

    KW1M Eco-POWER METER 6.2.5 Electricity Charge ・It displays the standard electricity charge for the integral electrical power. Sample *When the value exceeds ‘999999’, ‐ ‐ ‐ ‐ ‐ ‐」 「 will be displayed. 6.2.6 Carbon dioxide conversion value ・It displays the standard conversion value for the integral electrical power. Sample conversion value (kg-CO *When the value exceeds ‘999999’,...

  • Page 41: Frequency *Only Akw1111/Akw1111B

    KW1M Eco-POWER METER 6.2.8 Frequency *only AKW1111/AKW1111B ・It displays the frequency. Sample Frequency (Hz) 6.2.9 Hour meter ・It displays ON-time and OFF-time of the load. ・Press <SHIFT/▽> to change the load ON-time to load OFF-time. Sample ON-time (h) OFF-time (h) Blinking the decimal point during Blinking the decimal point during measurement of ON-time.

  • Page 42: Counter *Only Akw1111/Akw1111B

    KW1M Eco-POWER METER How to Reset ON/OFF-time ・Hold down <SET>key and press <MODE>key makes ON-time or OFF-time clear. (ON-time and OFF-time are reset by each.) Reset <SET> <MODE> 6.2.10 Counter *only AKW1111/AKW1111B ・It displays present count value (pulse input value). Sample Prescale: 0.01 ＊After reaching the full scale (999999), the value reverts to 0 but continues to measure.

  • Page 43: Chapter 7 Communication

    KW1M Eco-POWER METER Chapter 7 Communication 7.1 Communication Procedures Communication starts with command transmission from the host computer (hereafter Master) and ends with the response of Eco-POWER METER (hereafter Slave). Master Slave Command • Response with data When master sends reading command, slave responds with the Data corresponding set value or current status.

  • Page 44: Mewtocol Communication

    KW1M Eco-POWER METER 7.3 MEWTOCOL Communication 7.3.1 Overview of MEWTOCOL-COM (RS485) ◆Command and response functions The computer sends commands (instructions) to Eco-POWER METER, and receives responses in return. This enables the computer and Eco-POWER METER to converse with each other, so that various kinds of information can be obtained and provided.

  • Page 45: Data Register List

    KW1M Eco-POWER METER 7.3.2 Data Register List <AKW1111/AKW1111B (400AC applicable type)> Data register Name Unit Kind of data Range DT00054 Rate (CHG) 0.01 0 to 9999 Unsigned 16bit Conversion factor 0.001 DT00055 0 to 9999 Unsigned 16bit (CO2) kg-CO Rated A DT00060 CT type 5,50,100,250,400,600...

  • Page 46: Data Register List

    KW1M Eco-POWER METER 7.3.3 Data Register List <AKW1110/AKW1110B> Data register Name Unit Kind of data Range DT00054 Rate (CHG) 0.01 0 to 9999 Unsigned 16bit Conversion factor 0.001 DT00055 0 to 9999 Unsigned 16bit (CO2) kg-CO Rated A DT00060 CT type 5,50,100,250,400,600 Unsigned 16bit (rms)

  • Page 47: Error Codes

    KW1M Eco-POWER METER 7.3.4 Error Codes ◇Basic procedure errors Error code Error name Explanation ・A Bcc error occurred in the command data. Bcc error ・A command message was sent that does not fit the transmission Format error format. ・A command was sent that is not supported. No support error ・Delimiter with multiple frames was sent.
  • Page 48 KW1M Eco-POWER METER ◆[MD]: Register or Reset data monitored (Registers the data to be monitored.) *Up to 16 points can be registered for one unit. ◇Command (Register) Data specification ① Data specification Word No. Word No. Destination ％ ＃ 5 characters 5 characters ×10 ×10...

  • Page 49: Modbus (Rtu) Communication

    KW1M Eco-POWER METER 7.4 MODBUS (RTU) Communication 7.4.1 Overview of MODBUS (RTU) ◆8-bit binary data in command is transmitted as it is. Data format Start bit : 1 bit Data bit : 8 bits *7bits is not available. Parity : No parity, Even parity, Odd parity Selectable Stop bit : 1 bit (Fixed) Error detection...
  • Page 50 KW1M Eco-POWER METER ◇Data: Data depends on the function code. A request message from the master side is composed of data item, number of data and setting data. A response message from the slave side is composed of number of bytes, data and exception code in negative acknowledgement.
  • Page 51 KW1M Eco-POWER METER <3> Reset integral electric power (0064H, 0065H: 2-word) of address 1 (When setting to 0 [0000, 0000H]) ・Command Number of Slave Function Data item Number of 3.5 idle data item to ⇒ address code data characters write (01H) (10H) (0064H)

  • Page 52: Data Register List

    KW1M Eco-POWER METER 7.4.2 Data Register List <AKW1111/AKW1111B (400VAC applicable type)> Data item Range: Hexadecimal MODBUS Name Unit Kind of date (Range: Decimal) Function code (MEWTOCOL) 0036H Rate (CHG) 0H to 270FH (0 to 9999) 0.01 Unsigned 16bit 03H/06H/10H (DT00054) Conversion factor 0037H 0.001...
  • Page 53 KW1M Eco-POWER METER Data item Range: Hexadecimal MODBUS Name Unit Kind of date (Range: Decimal) Function code (MEWTOCOL) 0096H 0H to F423FH (DT00150) Load ON-time 0.1h Unsigned 16bit 03H/06H/10H 0097H (0 to 999999) (DT00151) 0098H 0H to F423FH (DT00152) Load OFF-time 0.1h Unsigned 16bit 03H/06H/10H...

  • Page 54: Data Register List

    KW1M Eco-POWER METER 7.4.3 Data Register List <AKW1110/AKW1110B> Data item Range: Hexadecimal MODBUS Name Unit Kind of date (Range: Decimal) Function code (MEWTOCOL) 0036H Rate (CHG) 0H to 270FH (0 to 9999) 0.01 Unsigned 16bit 03H/06H/10H (DT00054) 0037H Conversion factor 0.001 0H to 270FH (0 to 9999) Unsigned 16bit...

  • Page 55: Chapter 8 Specifications

    KW1M Eco-POWER METER Chapter 8 Specifications 8.1 Main unit Item AKW1111/AKW1111B AKW1110/AKW1110B Rated operating voltage 100-240V AC Rated frequency 50/60Hz common Rated power consumption 8VA (240VAC at 25℃) 6VA (240VAC at 25℃) Inrush current Max. 30A (240VAC at 25℃) Allowable operating 85-264V AC (85% to 110% of rated operating voltage) voltage range Allowable momentary...

  • Page 56: Pulse Input *Only Akw1111/Akw1111B (400Vac Applicable Type)

    KW1M Eco-POWER METER <Using the dedicated CT> ・5A/50A/100A/250A/400A/600A (Select with setting mode) Input Primary side <Using a commercial CT with the secondary side current 5A> current rating ・1 to 4000A (Set with setting mode) *Use a CT with secondary side current of 5A when measure 600A or more. Cut-off 1.0 to 50.0%F.S (Set with setting mode) current...

  • Page 57: Output Specifications

    KW1M Eco-POWER METER 8.3 Output Specifications 8.3.1 Pulse output (Transistor output) AKW1111/AKW1111B AKW1110/AKW1110B Number of output point 1 point Insulation method Optical coupler Output type Open collector Output capacity 100mA 30V DC Pulse width approx. 100ms ON state voltage drop 1.5V or less OFF state leakage current 100μA or less...

  • Page 58: Self-Diagnostic Function

    KW1M Eco-POWER METER 8.5 Self-diagnostic function If an error occurs, the following indication will be given. Indicator Meaning Output status To recover Err0 CPU error Turn the power off and then on again. Err1 Memory error* EEP-ROM life ended. Replace the unit. *Includes the possibility that the EEP-ROM’s life has expired.

  • Page 59: Dedicated Current Transformer Specifications

    KW1M Eco-POWER METER 8.8 Dedicated Current Transformer Specifications ●Clamp-on type AKW4801B AKW4802B AKW4803B AKW4804B AKW4808B Model No AKW4801C AKW4802C AKW4803C AKW4804C AKW4808C Primary side rated current 5A / 50A 100A 250A 400A 600A Secondary side rated 1.67mA / 33.3mA 125mA 200mA Current 16.7mA...
  • Page 60 KW1M Eco-POWER METER ●Through type AKW4506B AKW4507B AKW4508B Model No AKW4506C AKW4507C AKW4508C Primary side rated current 50A / 100A 250A / 400A 600A Secondary side rated 16.7mA / 33.3mA 125mA / 200mA 200mA Current Transform ratio 3000:1 2000:1 3000:1 Ratio error ±1.0%F.S.

  • Page 61: Chapter 9 Mounting

    KW1M Eco-POWER METER Chapter 9 Mounting 9.1 Dimensions 9.1.1 AKW1111/AKW1111B Main unit 9.1.2 AKW1110/AKW1110B Main unit...

  • Page 62: How To Mount To Din Rail

    KW1M Eco-POWER METER Panel cutout 9.2 How to mount to DIN rail (1) Hook “A” of main unit on the upper side of DIN rail. (2) Making “A” part as a support fit the bottom side of main unit to DIN rail. (3) It will be completely fixed to DIN rail with a “click”...

  • Page 63: Chapter 10 Q&A

    KW1M Eco-POWER METER Chapter 10 Q&A I’d like to measure by Eco-POWER METER. Measured load is 50 to 60A in normal operation. But the inrush current is 130 to 140 A. Which CT is selected? (100A or 250A) Select 100ACT. Stable current more than 1 second is necessary to measure.

  • Page 64: Revision History

    KW1M Eco-POWER METER Revision History Issue Date Manual no. Content of revision January, 2010 ARCT1F473E First edition January, 2012 ARCT1F473E-1 edition [Add function] 600ACT input Add through type CT [Improve spec.] Improve the accuracy [Correct error] VT wiring July, 2013 ARCT1F473E-2 edition Company name change...

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