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I. Abstract:
Leaded by academician Xue Qikun of Tsinghua University, a team of researchers from Tsinghua University, Institute of Physics of the Chinese Academy of Sciences and Stanford University made a major breakthrough in the study of quantum anomalous Hall effect. Quantum anomalous Hall effect was observed for the first time in experiments. Haller Hall discovered in 1880 that the abnormal Hall effect finally realized the quantification of the anomalous Hall effect after 133 years. This is an important physical phenomenon observed independently by scientists in China, and it is also an important scientific discovery in the world's basic research field.
Scientists of our country discovered the quantum anomalous Hall effect for the first time in the world and were hailed by the famous physicist Professor Yang Zhenning as the scientific research achievement of “Nobel Prizeâ€. On April 13, 2013, the CCTV's focus talk show reported scientific achievements. The success of the scientific experiment experienced more than 1,000 days and nights, and a large number of experiments were done. From the video, we can see that the Jin Lishi regulator is in the experimental equipment. Was successfully applied.
Second, the function of XM908 instrument
XM908 regulator main functions:
Setpoint SV curve programming function, according to the site process requirements set different curve temperatures, PID control output, with a variety of actuators on the electric heating equipment, electromagnetic, electric valve control, so that the measured object according to the set The temperature curve completes heating, constant temperature, heat preservation, cooling and other processes.
XM908 regulator overview universal input, can be used with various types of sensors, transmitters, to achieve temperature, humidity, pressure, liquid level, flow and other physical quantities measurement, display, alarm control and transmission output; universal output design, using experts PID control algorithm, precise and stable control, no overshoot, no undershoot; can read and write all instrument parameters in the host computer; heating power segmentation limit function, suitable for controlling silicon carbon rod and other loads; hand automatic bumpless switching function There is a setpoint SV curve programming function (optional seconds or divided into time units), up to a maximum of 50 segments, and there is a curve running start and stop external control; instrument through the positive and negative relay, direct drive with feedback (or No feedback) electric actuator.
XM908 regulator technical parameters input specifications:
Thermocouple: K, S, R, n, E, J, B, T, Wr5-26, WR3-25, ea1, eU2, etc. Thermal resistance: Pt100, Cu50, Cu53, BA1, BA2, etc. Voltage: 0~20mV, 0~60mV, 0~100mV, 0~1V, 0.2~1V (input impedance ≥ 5MΩ), 0~5V, 1~5V (input impedance ≥ 500KΩ), etc. Current: 0~10mA (input impedance ≤ 500Ω), 0~ 20mA, 4~20mA (input impedance ≤ 250Ω) and other resistance: 0 ~ 80Ω, 0 ~ 400Ω, three-wire connection mode, requiring three-wire resistance is equal, and the lead resistance is less than 18Ω
Other special signals need to be customized Accuracy: 0.2% FS ± 1 word Display: 8 bright LED display, display range, -1999~9999
Alarm output: four alarm modes: upper limit alarm, lower limit alarm, positive deviation alarm and negative deviation alarm.
Normally open/closed contact capacity is 2A/220VAC or 2A/24VDC, resistive load;
When the relay contacts are inductive load, both ends of the load must be connected to the spark absorbing circuit, and the carrying capacity should be reduced accordingly.
Control output: relay contacts (capacity 2A/220VAC or 2A/24VDC, resistive load)
SSR drive voltage: 12VDC/30mA
Linear current: any setting between 0~22mA (output voltage ≤11V)
Single phase SCR zero-crossing, phase-shift triggering, can trigger 5-500A bidirectional thyristor (or single silicon anti-parallel module)
SCR contactless switch output (normally open), contact capacity 220AC/200mA, instantaneous operating current 2A
Transmission output: standard current transmission output 4 ~ 20mA, load resistance ≤ 500Ω, 0 ~ 10mA load resistance ≤ 1000Ω,
Independent isolated power supply current output (DX module) 4~20mA, load resistance ≤ 250Ω,
Standard voltage transmission output or independent isolated power voltage transmission output, load resistance ≥ 200kΩ.
Transmission accuracy: ±0.3%FS±1 word Communication: RS232C, RS485, baud rate 4800~19200bps
Power distribution output: 5VDC, 12VDC, 24VDC, etc. (Max. current: 30mA)
Temperature compensation: 0~50°C Digital temperature automatic compensation Operating environment: Ambient temperature 0~50°C, relative humidity ≤85%, avoid strong corrosion gas Power supply: Switching power supply: 100~240VAC (50Hz/60Hz), 24VDC/AC± 10%
Power consumption: ≤4W
Jin Lishi instrument model complete, sales hotline 4006690677
Welcome to inquire Guo Yang.
Beijing Jin Lishi Instrument Technology Co., Ltd.
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