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LCD DC Coulometer Multifunction Voltmeter Ampere Meter DC6-200V 20A Built-in shunt

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                  Specifications:

                  Voltage: DC 6-200V ±0.3%
                  CurrentDC 0-20.00A ±0.3% 
                  Power:0.000W-250.0KW
                  Capacity: 00.000AH-999.99KAH
                  Energy: 0.000WH-9999KWH
                  Temperature: -40℃-120℃ ±0.5℃
                  Backlit: 0S-250S 0S always bright
                  Time: 0S-1000 Day Load Timing
                  Adjust: Voltage,Current and Current z'ero Point
                  Memory: Cumulative and z'ero-setting
                  Size: apparent:88*52*26mm 
                  Installation: 83*47mm

                  Communication protocol:
                   
                  Instrument communication format is TTL level serial port communication. In order to use the method, the interface uses MICRO USB base. Convenient connection, please do not think it can be directly
                   
                  USB communication with computers! For example, with computer communication, it needs computer side to prepare USB-TTL converter, and then connect to meter.
                  This protocol is for professional programmers only, for example, to achieve multi-online, other equipment interoperability. Ordinary users do not need to read.
                   
                  >>>>>>First, device data output mode.
                  Baud rate: 19200 check digit: NONE data bits: 8 stop bits: 1
                  Each output will output a set of device information consisting of 44 bytes.
                  Practical example: FE FE FE FE 00 00 00 FD E8 00 00 3F 48 00 10 11 48 00 01 2B 5A 00 00 00 04 00 00
                                                 04 9A 00 02 3C 5B 00 00 05 9B 00 00 00 0B 01 26 00
                  Order sequence: 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
                                               28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44
                  01 02: fixed as FEFE data group start sign
                  03 04: fixed as FEFE data group start sign
                  05  : the local Internet address is defaults to 0.
                  06 07: voltage value high byte
                  08 09: voltage value low byte variable format Unsigned long note: the conversion result is mV.
                  10 11: current value high byte
                  12 13: current value low byte variable format Unsigned long note: the conversion result is mA.
                  14 15: power value high byte
                  16 17: power value low byte variable format Unsigned long note: the conversion result is mW.
                  18 19: high power value byte
                  20 21: power value low byte variable format Unsigned long note: the conversion result is mWH.
                  22 23: high load time byte
                  24 25: load time low byte variable format is Unsigned long note: the conversion result is in minutes.
                  26 27: high power byte
                  28 29: power value low byte variable format Unsigned long note: the conversion result is mAH.
                  30 31: cumulative power value high byte
                  32 33: cumulative power value low byte variable format is Unsigned long note: the conversion result is mWH.
                  34 35: cumulative power value high byte
                  36 37: cumulative power value low byte variable format Unsigned long note: the conversion result is mAH.
                  38 39: accumulated high load time byte
                  40 41: Cumulative load time low byte variable format for Unsigned long Note: The conversion result is in minutes
                  42 43: the temperature variable format is int note: the conversion result is 0.1 degrees.
                  44   : the current control level output state 0 is low level 1 is high level.
                  Explain:
                  The instrument outputs a set of information every time. It can filter and select useful information according to needs.
                  >>>>>>Two. How to issue instructions to equipment
                  All instructions start with 7733 marks.
                  1. Remove the current power-on capacity, load time and watt-hour to the equipment.
                  Practical example: 77 33 C0 02
                  Number correspondence: 01 02 03 04
                  01 02: Identification Header 03: Device Address+0xC0  04: This Record z'ero-clearing Instruction Code
                  2. Delivery of z'ero-clearing cumulative-capacity, load-carrying time, watt-hour to equipment:
                  Practical example: 77 33 C0 03
                  Number correspondence: 01 02 03 04
                  01 02: Identification Header 03: Device Address+0xC0  04: Cumulative Record z'ero Clearing Instruction Code
                  3. To issue instructions to the device to change the data output mode:
                  Practical example: 77 33 C0 41
                  Number correspondence: 01 02 03 04
                  01 02: Identification Header 03: Device Address+0xC0  04: Instruction Code [40 – Stop Output 41 – Output a set of data 42 – Start Continuous Output Data] Outgoing by default is 40
                  4. Issue instructions to fix the address of the equipment:
                  Practical example: 77 33 C0 81
                  Number correspondence: 01 02 03 04
                  01 02: Identification Header 03: Device Address+0xC0  04: Instruction Code [New Address = 0x81-0x80] Address Range 0x00-0x7f Total 128 So Instruction Code Range is 0x80-0xff
                  5. To issue mandatory instructions to the equipment:
                  Practical example: 77 33 8A
                  Number correspondence: 01 02 03
                  01 02: Identification Header 03: Instruction Code [8A-u'nconditional Stop Output 8B-u'nconditional Single Output Set of Data
                  This command ignores the device address and can be used to view the device address when it is forgotten that the device address cannot be controlled.
                   
                  Attachment: the data are all 16 hexadecimal, just for the convenience of explanation, there is no space in actual data.
                   

                  Package Includes:

                  1 x Multi-function voltmeter

                  Details Pictures:
                   

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