China Shenzhen Calinmeter Co,.LTD Company News

Testing Methods and Tools To accurately obtain the testing indicators for the differential upgrade project, we have adopted the following methods and technical means: Resource Size Detection: Use file system tools to accurately calculate the size of the differential package and compare it with the theoretical value; simultaneously, indirectly verify the compression effect through the differences between versions before and after actual deployment. Upgrade Speed Assessment: Set up automated scripts to simulate real user operation steps, record the start and end times of each upgrade, and calculate the average time taken; additionally, pay special attention to the performance of the first differential upgrade after the initial installation. Stability Testing: Construct multiple sets of experimental environments (including but not limited to Wi-Fi, 4G/5G mobile networks) and introduce random interference factors (such as weak signals, high latency) to increase testing difficulty; use a log monitoring system to track the status changes of each step in real-time, ensuring that any potential issues can be detected promptly. Testing Progress Currently, the testing work for the differential upgrade project is underway. Our team members are following the established plan and conducting a comprehensive and detailed examination of the new solution across multiple dimensions. To ensure the accuracy and reliability of the test results, we have set up a strict quality control process, where each test case undergoes multiple repetitions to ensure the data's high consistency and repeatability. Additionally, we have established a rapid response mechanism to address any problems or challenges encountered during the testing process, ensuring that we can adjust strategies and resolve issues promptly, allowing the testing work to proceed smoothly. Considering the broad scope and multiple stages involved in this testing, we anticipate that the complete testing cycle will last approximately two weeks. During this time, we will closely monitor the trends of all relevant indicators and collect detailed data for subsequent analysis. Upon completion of the testing, we will immediately proceed to compile a test report, listing the results of each test, any issues discovered, and suggestions for improvement. The final test results will be officially announced in two weeks, providing solid data support for the project's next decision-making phase. Conclusion and Outlook Although the complete test results are not yet available, the preliminary feedback indicates that the "Differential Upgrade" solution has shown promising potential. This not only saves the company significant operating costs but also provides strong support for subsequent product iterations. In the future, we will continue to optimize existing algorithms and explore more potential application scenarios, striving to equip each product with superior performance and a better service experience.

Project Background As an electrical meter software engineer, I am responsible for the "Differential Upgrade" project, which aims to optimize the existing firmware update mechanism for a more efficient and stable remote upgrade process. This improvement will not only significantly reduce data transmission volume and lower bandwidth costs but also shorten user wait times and enhance the user experience. After a period of development, the differential upgrade function is now complete, and the next step is to undergo rigorous testing to ensure that its performance and stability meet expectations. Testing Objectives The testing will focus on the following three aspects: Resource Size Detection: Verify that the actual size of the differential package meets the preset standards, ensuring that the upgrade package size is minimized without affecting the integrity of the functionality. Upgrade Speed Assessment: Measure the time required to complete the entire upgrade process from start to finish, compare it with the traditional full upgrade method, and analyze the efficiency improvements brought by the differential upgrade. Stability Testing: Simulate upgrade scenarios in different network environments to check for any interruptions, failures, or other abnormal conditions, and record the success rate of each attempt.

Honorable Colleagues, We are pleased to announce that the XG3 project, customized for the specific needs of our Bangladeshi customers, has received a major update with the combined efforts of our R&D team and engineering department - XG3 2.0 single-phase prepaid electricity meter. After a series of rigorous testing and validation, the new version not only fully meets the latest market requirements but also achieves significant improvements in several key performance indicators. XG3 2.0 has been fully optimized based on the PCB samples provided by our customers. We have made in-depth improvements to the circuit design, component selection, and software algorithms to ensure that the product reaches an unprecedented level of accuracy, stability, and user experience. Particularly noteworthy is that the new version of the single-phase prepaid electricity meter also has enhanced adaptability in extreme environments, which will greatly expand its application scope and increase user satisfaction. The success of this upgrade could not have been achieved without the hard work and support of every participant. From the initial conceptualization to the final product implementation, the entire process has gathered everyone's efforts and wisdom. Currently, XG3 2.0 has passed all the necessary internal and external certification tests and has officially entered the mass production stage, and will be delivered to the first batch of pre-ordered customers soon. Looking ahead, we will continue to uphold the spirit of innovation, continue to explore and improve our technological solutions, and provide even better products and services to our customers around the world. Thank you for your efforts and support, and let's look forward to the brilliant achievements of XG3 2.0 in the market! Sincerely, Hardware Engineer CALIN METER

CALIN is pleased to announce the launch of the new smart meter under the "MAG" project - prepaid electricity meter 2.0 version in 2024. This product was carefully designed and developed by our team of engineers in close collaboration with our valued Bangladeshi customers. The addition of the "Zero Wire Drop Detection Function" not only maintains the original prepaid electricity meter's aesthetics and core functionality but also significantly improves the user experience and safety. Deepening Co-operation, Innovating Beyond Since the first time we supplied tens of thousands of high-quality electricity meters to our Bangladeshi customer, we have built up a deep relationship of mutual trust. After learning about the customer's demand for the new "zero wire drop detection function," CALIN responded quickly and organized a professional team to carry out technical research. After countless experiments and optimization, the seamless integration of this innovative function was finally achieved, ensuring consistency and compatibility between old and new prepaid electricity meters. Technological Innovation, Security Upgrade The launched version 2.0 of the prepaid electricity meter has cleverly incorporated advanced zero wire drop detection technology without changing the original appearance of the prepaid electricity meter. When the prepaid electricity meter detects an abnormality at the power input (e.g., one-phase or multi-phase disconnection), it is able to issue an alarm immediately and record detailed fault information. This improvement not only helps identify and deal with potential safety hazards in a timely manner but also provides strong support for the stable operation of the power system. Customer First, Quality Assurance "We are always oriented to customer needs and constantly pursue technological innovation," said the Managing Director of CALIN. "The successful development of the 'MAG' project prepaid electricity meter version 2.0 has once again proved our ability and determination to provide our customers with the best quality products and services. In the future, we will continue to deepen our partnership with our Bangladeshi customers and explore more possibilities together." Environmental Protection and Energy Saving, Win-Win Future It is worth mentioning that the new prepaid electricity meter, while enhancing its performance, has also fully taken into account the factors of energy saving and environmental protection. It adopts high-efficiency circuit design and low-power components to effectively reduce its own energy consumption, in line with the international trend of advocating green products. This is not only a responsible commitment to environmental protection but also brings greater value to customers. With the accelerated pace of global energy structure transformation and the growing demand for smart grid construction, we believe that the "MAG" project prepaid electricity meter version 2.0 will win wide recognition and support in the market by virtue of its unique advantages. CALIN looks forward to working hand in hand with more partners to create a better tomorrow! The above press release aims to celebrate the important achievements of the "MAG" project and convey CALIN's spirit of continuous innovation and customer-focused business. We hope this news will bring you and your team more confidence and strength in 2024.

Adopting advanced PC+GF composite material to achieve high flame retardant, heat resistant, and UV resistant characteristics, to protect the user's electrical safety and equipment reliability. SHENZHEN, China, Dec. 13, 2024 -- CALIN, a leading company in the smart smart metering field, today announced its newly developed material solution for smart meter enclosures. The solution is made of composite materials with excellent physical properties and environmental adaptability, which not only significantly improves the safety and durability of the product, but also provides users with a more reliable electricity experience.   High-end material options: In order to meet the stringent safety and stability requirements of modern power systems, CALIN has adopted two different ratios of polycarbonate (PC) and glass fiber (GF) reinforcement for the terminal block and housing parts of the product upgrade.   Terminal blocks: Made of PC + 20% GF composite material, they can withstand the scorching wire test up to 960 degrees Celsius and meet the highest level of the International Electrotechnical Commission's IEC standard - Flame Retardant Class V0. This means that the terminal blocks maintain their structural integrity even under extreme heat, effectively preventing fire accidents from occurring. Fire incidents. In addition, the material has excellent ultraviolet (UV) resistance, ensuring that it will not deteriorate or discolor when exposed to outdoor conditions for long periods. Shell: PC was also chosen as the base material, with 10% glass fiber added for reinforcement. After the 750-degree Celsius burning wire test, it still maintains good mechanical strength and also meets the standard of flame retardant V0. At the same time, it also has excellent UV resistance, which ensures that the appearance of the smart meter is beautiful and long-lasting, and at the same time, it provides a solid protective barrier for the internal electronic components. Safety First: Building a Safe Power Grid "We have always prioritized the safety of our customers' electricity." JET (Chief R&D Engineer) said, "By introducing these high-performance materials, we aim to provide the safest and most reliable electricity smart meter products in the market. Whether in a busy city center or a remote rural area, every user can rely on our devices with confidence." The application of this new material not only reflects CALIN's unremitting pursuit of technological innovation but also is a concrete manifestation of the company's continuous commitment to improving product quality and service level. In the future, CALIN will continue to increase investment in R&D, explore more possible technological breakthroughs, and contribute to the healthy development of the whole industry. Environmental protection and sustainable development: shared responsibility It is worth mentioning that while pursuing high performance, CALIN also pays great attention to environmental protection and social responsibility. All materials used are in line with international environmental standards, and the production process minimizes energy consumption and waste emissions, striving to achieve a win-win situation in terms of economic and social benefits. With the increasing global focus on renewable energy and the accelerating pace of smart grid construction, we believe that this new smart meter housing from CALIN will stand out in the future market competition and become a benchmark in the industry.

The purpose of this specification is to ensure that the measuring instruments can maintain their electrical performance and safety under overload conditions, especially for the temperature control of electrical circuits and insulating materials put forward strict requirements. It complies with the International Electrotechnical Commission (IEC) 60085 standard on the thermal resistance of insulating materials to guarantee the reliability and stability of the instrument in high-temperature environments. Test conditions and requirements   Ambient Temperature: Tests should be conducted at 40°C.   Current Load: The current circuit is required to carry the rated maximum current of the instrument.   Voltage loads: Voltage circuits and all their auxiliary voltage circuits whose duration exceeds their thermal time constant shall be subjected to 1.15 times the reference voltage.   Temperature rise limit: Under these conditions, the temperature rise of the external surface of the instrument relative to the ambient temperature should not exceed 25K.   Duration of test: The entire test lasts 2 hours and any drafts and direct sunlight must be excluded to ensure consistent and accurate test conditions.   Post-test validation   Physical Integrity: The instrument should not show any form of damage or deformation at the end of the test.   Dielectric strength test: according to the document 7.3 part of the provisions of the instrument also needs to pass the dielectric strength test, in order to prove that its insulating material can maintain good electrical performance in high-temperature conditions, to ensure the use of safety.   Key points Underrated operating conditions, the temperature of electrical circuits and insulating materials shall be effectively controlled to ensure that it does not reach a point where it interferes with the operation of the instrument.     After testing under these extreme conditions, the instrument should not only remain intact but also meet the requirements of the dielectric strength test to verify its stability and safety under high-temperature conditions.   By implementing these stringent test standards, we are committed to providing high-quality measuring instruments that comply with international safety regulations and stand up to the rigors of real-world applications. This not only demonstrates a commitment to product quality but also a high level of responsibility for the safety of our customers.

The purpose of this specification is to define the limits of error variation of measuring instruments under the influence of self-heating effects and their test methods. Specific error variation limits are set for Class 1 (Level 1) and Class 2 (Level 2) smart meters for different current strengths and power factors.   test step   Warm-up phase: First, the voltage circuits are powered under reference voltage conditions. This process should last at least 2 hours for class 1 smart meters and 0.5 hours for class 2 smart meters.   Current loading: Subsequently, the maximum rated current is quickly applied to the current loop without an initial current, and recording of the smart meter's error begins immediately.   Error monitoring: From the moment the current is applied, the instrument error shall be measured immediately at a power factor of 1 and the change in error over time shall be continuously monitored and an error change curve plotted. The entire test shall be maintained for at least one hour to ensure that the error fluctuation does not exceed 0.2 percent for any 20 consecutive minutes during this period.   Repeat Test: All the above steps should also be repeated at a power factor of 0.5 (inductive load condition) to fully evaluate the smart meter performance.   Cable requirements The length of the cable used to connect the test equipment should be fixed at 1 smart meter, and its cross-sectional area should be designed in such a way that the current density is maintained at a constant level between 3.2 A/mm² and 4 A/mm², thus guaranteeing the validity and accuracy of the test results.   Key points According to the provisions of Table 4, the increase in measurement error due to the self-heating phenomenon must be strictly controlled within the limits to ensure that the measurement data is true and reliable. Through these detailed test procedures, we are able to accurately evaluate the effects of self-heating that the measuring instruments may experience in the actual working environment, and thus provide a more accurate measurement service. At the same time, this series of rigorous test standards reflects our high commitment to product quality and customer satisfaction.

Based on thousands of water smart meters, the Indonesian delegation looks forward to working with Chinese partners to promote the 'smart city' program   Shenzhen, China, 13 December 2024 -- A high-level customer delegation from Indonesia arrived in China today to discuss participation in the country's ambitious "smart city" project. The visit not only reflects the high interest of Indonesia in cooperating with Chinese companies in the field of smart infrastructure construction but is also an important visit based on the existing good cooperation between the two sides in the supply of smart water smart meters.   Success Story: Exemplary Smart Water Smart Meter Project Over the past few years, this Indonesian customer has purchased tens of thousands of advanced smart meters from our company, which have been widely used in water supply system renovation projects in many cities in Indonesia. With stable and reliable performance and excellent customer service experience, our products have won high trust and support from our customers. During this visit, the Indonesian representatives especially pointed out that based on the successful application of smart water smart meters, they see a bright prospect of exploring more possibilities with Chinese partners.   Highlights of the visit: in-depth exchanges and field trips To better understand China's smart city technology and practical achievements, the Indonesian delegation has arranged a series of colorful activities. These include visiting our R&D center and production base to have a visual experience of the whole process from R&D and design to manufacturing; at the same time, we will also hold a symposium with experts in related fields to have an in-depth dialogue on technological innovation, project implementation, and other aspects. In addition, the two sides have warmly discussed how to formulate practical and feasible cooperation programmes in light of the actual situation of the local community, and have reached several preliminary consensus.   Looking ahead: a new chapter of win-win cooperation The successful implementation of this visit marks a new level of cooperation between Chinese and Indian enterprises in the field of smart cities. By sharing resources and complementing each other's strengths, we believe that we will write more successful chapters together on the road to development in the future. As one Indonesian delegate said, "We value the trusting relationship we have built up with the Chinese side and look forward to continuing to move forward hand in hand on a broader stage."   The arrival of Indonesian customers is not only a recognition of our product quality and service level but also lays a solid foundation for future in-depth cooperation between the two sides. Next, we will be more open to meeting the challenges, committed to providing global customers with higher quality products and services, and jointly promoting the continuous development of smart city construction.

Please note that at the time of manufacture, the mechanical and digital error range is ±0.2m³. If the discrepancy falls within the specified range, it is deemed to be within normal limits. Should the discrepancy exceed the aforementioned range, it may be attributable to human error in the reading of the data at the time of manufacture. In this instance, the mechanical reading can be rectified via the system or infrared, ensuring that the mechanical reading aligns with the data reading.   Subsequent water meters that were corrected showed a larger deviation after a defined period of use.   A: The electronic counting method exceeds the mechanical counting method. 1. The circuit board is faulty, resulting in the electronic component generating false pulses and consequently increasing the count. 2. Please inspect the reed switch for any signs of malfunction and use a multimeter to test its electrical functionality. 3. Please verify the position of the magnet, as it is typically fixed in place upon installation. If the installation position is incorrect, this will result in an increase in the electronic count. Please note that the probability of a fault in the meter causing electronic counting to exceed mechanical counting is extremely low.   B: The mechanical count is greater than the electronic count. Check the reed switches on the counter, as damage can cause the numbers to jump or not count. First, check the reed switches. A fault in the circuit board can also cause the electronic part not to count, but the probability of such an accident is extremely low. A jump in the pulse sampling between the counter and the circuit board.   If there is a problem with your CALIN water meter, please contact WhatsApp：0085 29670 4905，WeChat：0086 15577479982, E-mail：schnappi@szcalinmeter