- 11-24 2022
- Can im1253b electric energy metering module be compatible with im1253? A: im1253b is an upgraded version based on im1253 and according to customer requirements. It has a great improvement in function compared with im1253. Its pins have been redefined. Therefore, physically speaking, the two are incompatible. In addition, considering performance, supply and price, we recommend that you use the im1253b electric energy metering module. 查看详情
- 11-24 2022
- Can the im1253b electric energy metering module measure the battery? Answer: im1253b can measure the voltage, current, power and electric energy generated on the charging or discharging line of the battery, but cannot measure the remaining capacity of the battery. If the residual capacity requirement is not accurate, it can be treated by estimation (i.e. known energy - consumed energy = residual energy). 查看详情
- 11-24 2022
- What is the current range of im1253b electric energy metering module? What if I want to measure a larger current? Answer: the maximum measuring current of im1253b standard is 16A. If DC or AC current or power with larger current range is required, this module can be equipped with DC manganese copper (100A / 75mV, 200A / 75mV, 300A / 75mV) or AC open transformer (150A, 250A, 500A, etc.) with various ranges. 查看详情
- 11-24 2022
- Why does im1253b power metering module need two power supplies? Can you only use one circuit of power supply? A: why do I need two routes? Because manganese copper sampling is adopted for this module, the ground of the whole module is on the live line (see the figure below), which has been isolated from the communication module of MCU. The power supply of the other module needs to be isolated from the external power supply, so as to prevent damage to the external equipment. It is not allowed to use only one circuit in parallel, otherwise the module or external equipment will be damaged. Therefore, two power sources must be used for power supply, and one of them must be isolated. 查看详情
- 11-24 2022
- When the im1253b module is actually measuring, why is the measured voltage and current multiplied by the power not equal? 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. 查看详情
- 11-24 2022
- How to test the performance of im1253b electric energy metering module after receiving the goods? A: the im1253b can realize AC and DC adaptive measurement, that is, the im1253b you purchased can measure both DC and AC parameters. You don't need to worry about how to distinguish between AC module and DC module. 查看详情
- 11-24 2022
- Can im1253b measure AC and DC? How can I distinguish these two modules. A: the im1253b can realize AC and DC adaptive measurement, that is, the im1253b you purchased can measure both DC and AC parameters. You don't need to worry about how to distinguish between AC module and DC module. 查看详情
- 11-24 2022
- Rn8209x (C \ D \ g) rn8208g rn8207c read operation, since there is no check byte in the frame format, how to ensure that the read data is the correct Answer: the data read back from the SPI / UART port of the register address 44h rdata last time is used. After reading back a register data each time, the comparison of the values of the 44h rdata is read back. Only when the data is identical, can it be read effectively. If the data read back two times is different, the data read back is invalid and the register needs to be read again. 查看详情
- 11-24 2022
- What is the correspondence between rn8209x (C \ D \ g) rn8208g rn8207c power register and voltage and current effective value register? Answer: when power gain is 0 and power factor is 1, power register, voltage effective value register and current effective value register meet the following formula:Power register value / 2 ^ 31 = (voltage RMS register value / 2 ^ 23) x (current RMS register value / 2 ^ 23). 查看详情
- 11-24 2022
- In the calibration applications such as rn8209x / rn8208g / rn8207c / rn8302b / rn821x / rn202x / rn7326, the normalized value is often mentioned. How Answer: normalized value: the maximum value of the register is 1. The ratio between the actual register value and the maximum value of the register is the normalized value. This process is called normalization. 查看详情
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