What instrument special pneumatic - valve test need to prepare?

Special pneumatic - valve test apparatus and instrument to prepare what? ( 1) Test facility layout ( 2) Instruments used in the calibration test of each instrument and secondary instrument should be defined in a number or other tags. Each instrument shall be in accordance with its type according to the summary of this section of the following points are calibrated. The instrument calibration records shall be kept for relevant parties to consult. 1 > pressure measuring instrument measuring instrument accuracy level should not be lower than 0. Level 5. Pressure measurement system should include two sets of pressure measuring instrument, in order to test for each school. Shall be carried out according to relevant state regulations for pressure measurement instrument calibration. Instructions or not stated in the rules of national pressure calibration method of recording device should be concerned. 2 > the resolution of temperature humidity measuring instrument measuring instrument should not be lower than 0. 5. Ao. Temperature measurement system should include two sets of temperature measuring instrument, so that in the experiment for the school. Shall be carried out according to relevant state regulations on temperature measuring instrument calibration. Not stated in the rules of national temperature indicating or recording equipment calibration method should be concerned. 3 > open high measuring instrument opened higher the resolution of the instrument shall be not less than 0. 02mm。 Should be in each test or series of tests before and after the inspection on its precision. 4 > weight scale special pneumatic control valve in the test procedure for weighing the weight of the condensation weight scales, it indicates the minimum scale value parts should be less than or equal to the expected load of 0. 25%. Weight scale should be used in this standard test before each or a series of tests according to relevant state regulations on enough point calibration, so as to ensure the accuracy of its intended use within the scope. 5 > steam heat meter heat meter shall be separately at the time of its installation and in less than 6 months of calibration cycle with steam. When the measurement results show that the reading have obvious errors or after reinstalling, should be calibrated again. Combination of special pneumatic - valve 6 > flowmeter for every type of flowmeter calibration should include actual pipe upstream and downstream flow meter and all attachments, accessories including control valves, containers and containers with valve fittings. This calibration should be completed before the executive official test by using the method of comparison, namely the flow measurements with the calibration of flowmeter in advance device of comparison, the latter of the calibration is a device or mechanism to complete with the original. About the calibration of flowmeter device in advance agreement should make overall final testing results of deviation in 2. Less than 0%. Calibration should be in the middle of the corresponding to the minimum contrast device, and under the maximum flow. For valves with different inlet connection form, the fittings shall be carried out during manufacturing or purchasing personnel by the laboratory calibration. In addition, the flow meter device should be as above at least every five years to a calibration again. The recalibration should include the use of at least two size fittings. Audit shall maintain records of calibration and provide relevant aspects. If the change of equipment, should assess the impact of this change may be on the system calibration, new calibration should be done when it considers necessary. ( 3) Test the adjustment when in collecting data, should not make any adjustment pressure relief devices. After any change or deviation in test conditions, should be given enough time to flow, temperature and pressure stability after the acquisition. ( 4) Test records and test results of test records should include all the test object observation, measurement, meter reading and instrument calibration records ( When required, try the original SAO records shall be kept by the testing institutions. The duration of not less than five years. Copies of all test records shall be submitted to test. Correction and revisions shall be manned test record. ( 5) 湏 prepared test measurement error should be carried out to determine, the use of the instrument and procedure stipulated can satisfy the final displacement measurement error Cha stipulated limit. Should also be tested after the error of the partition, unless the parties agree that and confirmed that the provisions of the instrument and procedures including the discrete data is according to the test specification to use and implement, to confirm that the error of the pilot study to determine after the test is still valid. Error to determine should be documented for review by the laboratory.