- [Energy metering related]Why should the smart meter be replaced?2022.11月.24 11:28
- Answer: At present, most of the electric energy meters used by customers are mechanical meters or electronic meters with single function. Intelligent electricity meter has the functions of electric energy measurement, information storage and processing, real-time monitoring, automatic control, information interaction, etc. It is the most important measurement appearance for completing the automation and intelligence of electric energy information collection.
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- [Energy Metering IC]Description of dynamic range of Ruineng micro electric energy metering chip2022.11月.24 11:18
- Dynamic range: refers to the ratio of the minimum value of ADC input signal to the maximum value of ADC input signal (i.e. full-scale value) when the power metering chip guarantees specific measurement or metering accuracy (full-scale value: minimum input signal).
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- [Energy Metering IC]Selection method of sampling resistance of current loop of Ruineng micro metering IC (CT)2022.11月.24 11:11
- When designing metering products with Ruineng micro metering chips, the majority of electronic hardware engineers often encounter the situation of selecting different sampling resistors for different current specifications.
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- [Energy Metering module]What is the significance of calculating the parameters in hfconst formula in the first step of the meter calibration method in the application note of2022.11月.24 11:09
- EC takes the empirical value of 3200. Finally, the hfconst is calculated to be 9957, converted into hexadecimal number 0x26e5 and written into the hfconst register.
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- [Energy Metering module]Can im1281b single-phase electric energy metering module be used to measure three-phase electric energy?2022.11月.24 11:07
- Yes, please refer to the following application wiring diagram: precautions:There are 3 design methods of communication port with MCU:Three UART ports of MCU are connected to UART ports of three modules .One UART port of MCU, and the UART ports of three modules are connected through a multiplexer (such as CD4051)
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- [Energy Metering module]Is there anything else you need to pay attention to when applying the module?2022.11月.24 11:06
- Answer: when the module is applied, such as direct plug-in welding, it is forbidden to use strong current lines on the PCB surface at the bottom of the module, and try to avoid wiring.
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- [Energy Metering module]When the module is applied, how to operate if 3.3V power supply is required?2022.11月.24 11:02
- Answer: if 3.3V power supply is required, the rdj of the module needs to be short circuited (as shown in the figure below). This operation is recommended to be conducted after the test is qualified under 5V power supply, because after short circuiting rdj, the V + V - anti reverse connection function will be invalid, and the module will be burnt directly if connected reversely.
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- [Energy Metering module]How is the im1281b electric energy metering module connected to the actual load? Does it matter if the fire zero line is connected reversely?2022.11月.24 11:01
- Users do not need to worry that the module will be burnt or not measured if the live line and zero line are connected reversely. The module has been processed by hardware design and program to ensure that the positive and negative connection will not affect the use of the module and that the electric energy and electric parameters will be measured correctly.
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- [Energy Metering module]Can im1281b electric energy metering module communicate with multiple modules through one serial port? If yes, what should I do?2022.11月.24 11:00
- Answer: the communication port of im1281b is UART port. This communication port belongs to point-to-point communication. In principle, it is impossible to realize 1-to-many communication. If it is really necessary, one serial port can communicate with multiple modules. It can be realized by adding CD4051 single end 8-channel multi-channel switch core between modules and serial ports.
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- [Energy Metering module]Can the im1281b electric energy metering module replace the electric energy meter / guide rail meter?2022.11月.24 10:58
- Answer: the im1281b electric energy metering module supports MODBUS and DL / T 645-2007 protocols at the same time. Therefore, it can directly replace the electric energy meter for electricity accumulation and electric parameter collection. The user only needs to solve the connection problem of power supply and communication, and does not need to make any changes in the software. Its typical applications include replacing electric energy meters in automobile charging piles.
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- [Energy Metering module]Im1281b electric energy metering module test does not communicate. What are the possible reasons?2022.11月.24 10:57
- Answer: if the im1281b electric energy metering module encounters communication failure, first check whether the communication parameters of the module are set correctly (including serial port number,
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- [Energy Metering module]What is the current range of im1281b electric energy metering module? What if I want to measure a larger current?2022.11月.24 10:56
- Answer: the maximum measuring current of im1281b standard is 50A. If AC current or power with larger current range is required, this module can be equipped with AC open transformers (150A, 250A, 500A, etc.) with various ranges.
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- [Energy Metering module]Whether im1281b electric energy metering module can be directly connected to MCU without isolation.2022.11月.24 10:54
- Answer: im1281b electric energy metering module adopts double isolation sampling of voltage and current. Therefore, during actual test and application, MCU can be directly connected to the pin of the module for normal communication and data reading.
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- [Energy Metering module]When the im1281b module is actually measuring, why is the measured voltage and current multiplied by the power not equal?2022.11月.24 10:53
- Answer: the calculation formula of standard active power is: voltage x current x power factor (uxixcos Φ), Never lower the power factor. Our electric energy measurement mainly measures the active power, and the voltage x current is the apparent power.
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- [Energy Metering module]How to test the performance of im1281b electric energy metering module after receiving the goods?2022.11月.24 10:52
- A: it is recommended that you purchase at least 2pcs or more for the first time to facilitate testing. After purchasing the module, our salesmen will provide you with a set of information packages, including manuals, upper computers, packaging libraries and other information.
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- [Energy Metering module]Can im1281b electric energy metering module measure AC and DC?2022.11月.24 10:39
- A: im1281b can only conduct AC measurement. If you need DC measurement, you need to choose another module im1253b.
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- [Energy Metering module]How to conduct simple test when im1253b is first used?2022.11月.24 10:37
- GND of 5V output of this power supply cannot be grounded with PC / laptop terminal .Generally, DC source can be used for power supply. If the USB of another laptop is used as the power supply, the power supply of this laptop needs to be unplugged from the socket (at this time, the ground of this laptop is suspended), otherwise it may damage the laptop.
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- [Energy Metering module]How to connect the im1253b single-phase electric energy metering module with external high current manganese copper?2022.11月.24 10:34
- Answer: the wiring diagram of im1253b single-phase electric energy metering module with external high current manganese copper is as follows:
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- [Energy Metering module]How should the im1253b single-phase electric energy metering module of the external transformer be wired?2022.11月.24 10:29
- Answer: the wiring diagram of im1253b single-phase electric energy metering module of external transformer is as follows:
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- [Energy Metering module]Is there anything else you need to pay attention to when applying the module?2022.11月.24 10:28
- Answer: when the module is applied, such as direct plug-in welding, it is forbidden to use strong current lines on the PCB surface at the bottom of the module, and try to avoid wiring.There is a one-to-one correspondence between the modules and their supporting transformers.
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Hot news
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- 1In the first quarter of 2022, the sales volume of new energy vehicles totaled 1.257 million, with a year-on-year increase of 138.6%
- 2Making charging more convenient than refueling, Guangzhou will build the world's first "super charging city"
- 3Smart meters are facing new opportunities! The State Council issued the opinions on promoting the urbanization construction with the county as an impo
- 4Important | The new version of "Electric Vehicle AC Charging Pile Verification Regulations" has been released, and mandatory verification will be carr
- 5IRdopto participated in the 4th Shenzhen International Charging Station (Pile) Technology and Equipment Exhibition in 2020
- 6Good news! Aerida won the "Guangdong Charging Facilities Association-Member Unit"
- 7Good news! Congratulations to iRdopto for winning the "High-tech Enterprise" certification
- 8Good news | IRDopto Optoelectronics won the title of "Guangdong Province Abiding by Contracts and Valuing Credit Enterprises"
- 9New iRdopto products are coming! With 485 communication AC/DC power measurement module:IM1253C