Finalizing design proof. Appraisal of heat meter by designed organization. Proof test before delivery.

1, the main structure and technical indicators RJZ of heat mainly by the flow sheet verification device test systems, temperature control and verification system and computer data processing system. Flow test system includes the heat sink, frequency constant pressure pump control system, standard flow meter group, flow control system and the card table sets and other components. Temperature test system includes the temperature of water, fuel tank, standard platinum resistance thermometer, digital multimeter and other components. Computer control and data processing system is composed of Industrial machine, computer control boards and modules, parameter control and data processing software and printer components.

 

Main technical indicators: Temperature measurement range of 5 ~ 150 Temperature measurement range of 2K ~ 130K Flow Measurement range of 6L / h ~ 30m3 / h (12L / h ~ 8.0m3 / h) Heat measurement range (0 ~ 99999.999) kwh                 (0 ~ 99999.999) MJ Flow test medium temperature at room temperature, 50 ± 1 , 85 ± 1 Flow fluctuation coefficient "0.5% Water Flow Measurement Uncertainty:       Mass method 0.2% (k = 2)       Standard Tables 0.5% (k = 2) Temperature Measurement Uncertainty: 0.02 (k = 2) Thermal Measurement Uncertainty:       The quality of France 0.75% (k = 2)       Standard Tables 0.95% (k = 2) Applicable to thermal energy (volume) Table Diameter: DN15 ~ DN50 (according to type can be divided into DN15 ~ DN25 and DN15 ~ DN50 2 range); 2,3-level heat meters to meet the test. Use of the environment 15 ~ 35 Relative humidity <85% RH Atmospheric pressure 86 KPa ~ 106KPa Supply voltage three-phase 380V 50Hz ± 1Hz Maximum Power 30kVA (15kVA)

First, technical features Flow verification device is mainly based on EN1434 and the forthcoming enactment of the implementation of the "heat meter" National Verification Regulation requirements of design. First, set the heat sink, using three-phase heating device can ensure that there are sufficient heating power, but also ensure the balance of power. In order to ensure the stability of temperature control and accuracy of the addition of auxiliary heating, that is, near the temperature control point to control the use of small power, temperature control to reduce the overshoot of the amount of heating required to achieve rapid and stable. In order to be able to ensure that the scope of the different flow velocity constant, installations in the country for the first time using automatic frequency conversion constant pressure water supply control system. The system uses a high accuracy pressure transmitter and the regulator and the inverter control system controls the pressure changes in the exchange of selected high-performance variable-speed pump, at 0.3Mpa ~ 0.5MPa working pressure to ensure that traffic from 6L / h ~ 30m3 / h flow rate fluctuations within the amount of "0.5%, satisfying the conditions of heat meter flow sensor certification requirements. The technology we have to apply for utility model patents. Fully automatic constant pressure water supply control system with variable frequency over-current protection, overvoltage protection, undervoltage protection, overload and phase protection. To achieve high control accuracy, high efficiency, small size and energy conservation. In order to prevent damage to heating tank water heaters Shaogan set of automatic water level control device, so that the total water tank to maintain a stable level. In order to ensure uniformity of water temperature heating water tank with hot water circulation system to ensure uniformity of fluid temperature. Excellent heat insulation tank, one heated at room temperature under 18 condition of 55 water for 16 hours later, the water temperature reached 48 or above is still a large number of saving energy and improving efficiency. Flow test using comparison method (standard table method) and two methods for checking the quality of law. Comparative Law is an efficient verification method. In order to ensure the accuracy of comparative law test, installations for the first time in the country using high accuracy mass flowmeter electromagnetic flowmeter and make verification system flow uncertainty of less than 0.5%, especially in low flow rate can be 6L / h flow rate to guarantee the accuracy of test requirements, fully meet the 2,3-level verification flow sensors heat the table. Such an approach we have applied for utility model patents. Quality Act under the flow range of different uses two (or one) high accuracy of electronic scales, with a commutation device, through the control system to be completed by static or dynamic quality of law test in two ways. At the same time the quality of law also completed a standard flow meter for self-inspection work, eliminating the need for a standard form submission the trouble of dismantling and disassembly may be due to the impact of measurement accuracy. In order to make device has a high degree of automation and reliability of the devices in the flow test point is set on the use of microcomputer control technology, with advanced electromagnetic drive continuous control valve, once the test-point flow value can be set in a very short finish time to complete the adjustment process, the control characteristics similar to a straight line, especially in the control of small flows, reflecting the characteristics of this control method, and frequency with the constant pressure control system can guarantee verification flow changes during the "0.5%. In order to prevent pipeline bubbles in the water caused by calibration errors in the flow system, equipped with gas cylinders and a number of observations show consumption to ensure the verification process mirrors the water does not contain air bubbles. Practice has proved that a number of measures are very effective. Temperature Calibration Device in accordance with JJG128-98 "Industrial platinum, copper and thermal resistance test procedures" and test equipment requirements, the use of advanced computer-controlled thermostat bath to provide a stable temperature field: its temperature can range from 5 ~ 150 . Temperature settings can be 3K ~ 130K. Temperature of testing standards to meet the temperature value selected to pass between the second-class standard platinum resistance thermometer, use two high-accuracy digital multimeter to the standard platinum resistance measurements at the same time, you can remove applications switch caused by contact resistance and contact potential measurement caused by errors, but also ensures that the data collected in time, consistent, and test the reliability of data. The measured data by a computer controlled by a digital multimeter RS - 232 serial transmission to a computer for data processing, increased automation. 3. Computer Control and Data Acquisition and Processing System The device in the design process, taking into account the advanced nature of technology, using micro-computer technology, flow test of the heating systems used by media control, automatic test flow point as well as standard data collection, the temperature standards for data collection through advanced computing to complete and improve the data transmission capacity and efficiency. From the structure only by a Taiwanese industrial computer boards, and a few computers and modules to complete the entire work, eliminating the need for a different form due to the increase in use with the computer is connected

RJZ Type Heat Meter Calibration Device