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The four science and technology projects undertaken by Gansu Metrology Institute passed the acceptance test.
[ Instrument Network Instrument Development ] On February 28, 2019, Gansu Metrology Institute undertook the "development of spark tester calibration device" and "the influence of environmental conditions on the measurement uncertainty of E1 grade weight standard device", "Linear type" Four scientific and technological projects, such as the research on the calibration method of the beam smoke detector filter, and the research on the measurement method of the total chromium water quality online monitor, passed the expert acceptance organized by the Gansu Provincial Market Supervision Administration.
The spark tester calibration device developed by the "Synthesis of Spark Tester Calibration Device" project consists of a high voltage measurement system and a breakdown test system. High-voltage measurement, stability and sensitivity testing can be performed, and measurement data can be saved and printed on site. The device is reliable in measurement and easy to carry. The device uses a high-precision voltage divider and a high-precision electronic clock to achieve accurate measurement of voltage and time.
The study on the influence of environmental conditions on the measurement uncertainty of E1 grade weight standard device passed the study of the environmental conditions monitoring and change law of the whole year, and obtained the temperature and humidity of the E2 grade weight transfer laboratory in Lanzhou. The applicable range of environmental conditions such as atmospheric pressure and carbon dioxide content is proposed. The conditions for the air buoyancy correction of the E2 grade weight transfer in Lanzhou area are proposed. The influence of the air density change on the air buoyancy correction value is analyzed. The selection range of E2 grade weight material density.
The research on the "Linear Beam Smoke Detector Filter Calibration Method" project has determined the "measurement band dimming value error, the characteristic band dimming value uniformity, the characteristic band range positive and negative dimming value difference" and other three measures Performance indicators, the selection of appropriate measurement standards, the evaluation and calculation of uncertainty, the selection of filters from different manufacturers for method verification, provided verification data. At the same time, the JJF (Gan) 0034-2018 "Linear Beam Smoke Detector Filter Calibration Specification" of Gansu Province was developed and published, which filled the blank of the measurement and calibration of the filter of the linear beam smoke detector in Gansu Province. .
The “Study on the Method of Metrological Verification of Total Chromium Water Quality Meter†has determined six measurement performance indicators such as “detection limit, indication error, repeatability, stability, memory effect and conversion rateâ€, and selected the appropriate certificate. Standard materials were evaluated and calculated for uncertainty. Different concentrations of samples and different types of instruments were selected for method validation and verification data were provided. At the same time, the JJF (Gan) 0020-2017 "Grincipal Chromium Water Quality Online Monitor" of Gansu Province's local measurement and calibration specification was formulated and published, which filled the blank of the measurement and calibration of the total chromium water quality online monitor in Gansu Province.
(Original title: "Study on the development of spark tester calibration device" and other four science and technology projects passed the acceptance of Gansu Provincial Market Supervision Administration)