Product overview

   atsl-rn thermocouple thermistor bimetal thermometer full automatic calibration system is a product developed and manufactured by our company with Japanese technology. It is a measurement and control system with PC computer as the core, high-precision imported digital multimeter, imported low potential scanning switch and management software. The operator can conveniently operate the whole process with the mouse under the win7/winxp/unix/linux operating system, and the PC computer system displays the temperature control curve, temperature, verification time and other parameters of the verification furnace (or oil tank, low-temperature tank, etc.) in real time. The system carries out data processing in full accordance with the current national metrological verification regulations, and can print various record forms and verification certificates, and can also retain the original records for future reference. The system completely realizes the automation of the verification process of thermocouples and thermal resistors, that is, automatic temperature control, automatic verification, automatic data processing, automatic printing of verification results, and automatic saving of temperature rise curves. The labor intensity of the operator is greatly reduced, and the work quality of the verification is improved. The device also provides the authentication program and data file management program of the system, which provides convenience for the operator to file, retrieve and query the authentication of the system and the verification results.

  main features of the system

   1) the whole machine introduces foreign advanced technology;

   2) intuitive display and simple operation;

   3) complete functions and flexible configuration;

   4). High accuracy and high resolution;

   5) high degree of automation, high degree of standardization and short verification time;

   6) have system certification test skills;

   7) the system technology is mature and advanced with high reliability;

   8) perfect protective measures.

   system composition:

   referring to the working mode of DCS system, atsl-rn group control thermotechnical automatic verification system adopts modular structure and distributed control mode. Each channel of temperature control and multi-channel scanning sampling form a separate module unit. Users can configure different numbers of module units according to their needs, but it can't exceed 5 channels at most. PC computer is the upper computer, which is mainly responsible for multi-channel coordination, data sampling and data processing. The temperature control is completed by the lower computer "temperature controller" independently. The digital meter is a multi-channel shared resource, which completes the multi-channel sampling of the verification and measurement data of each module in time sharing.

   the overall structure of the system is shown in the figure:

In the figure, the upper computer is PC computer, and the lower computer is digital multimeter, scanner and temperature controller. PC computer interfaces with DMM through RS232 serial bus. PC computer and scanner and temperature controller adopt RS485 serial bus interface. Scanner, temperature controller and thermostat constitute a unit module, which is extended and connected by building block structure. Each unit module can start work independently.

   software:

  It runs completely under the win7/winxp/unix/linux operating platform with a mouse click. It conforms to the operating habits of Windows environment. The window interface, drop-down menu, and the use of the mouse to select input parameters and process operations are powerful, convenient, flexible and fast. During the verification process, the display shows the temperature change curve of the verification furnace (or oil tank, water tank, etc.), the temperature of the verification furnace (oil tank, water tank), the temperature of the verification point, the verification process, the cold end temperature, the millivolt value of the temperature control couple (the resistance value of the temperature control thermal resistance) and the verification time in real time.

The system is equipped with the certification test module of the thermocouple and thermal resistance verification device itself, which can automatically verify the total uncertainty and repeatability error of the thermocouple and thermal resistance verified by the device, as well as the temperature field of the verification furnace and oil tank, and sort out and print out the certification report. It brings great convenience to the operator for system standard establishment and system review.

   equipment service conditions:

   ambient temperature: 20 ℃± 5 ℃;

   relative humidity: ≤ 75% RH;

   use power supply AC220V ± 10%50 ± 1Hz;

   the grounding resistance is required to be ≤ 4 Ω;

   there should be no high concentration dust and corrosive gas around; It cannot be used and stored in flammable and explosive atmosphere, and there should be certain ventilation conditions.

   purpose:

   atsl-rn thermocouple thermal resistance bimetal thermometer full automatic verification system can be used to verify various industrial thermocouples, thermal resistances, Expansion thermometers, liquid glass thermometers, bimetal thermometers, pressure thermometers.

   meet the standard:

   the verification degree of the system is compiled in strict accordance with the relevant national verification regulations and implements ITS-90 international temperature scale, which meets the relevant standards and regulations, including:

  ● JJG 141-2013 precious metal thermocouples for work;

  ● JJG 351-1996 cheap metal thermocouples for work;

  ● JJG 229-2010 industrial platinum and copper thermistors;

  ● JJG 130-2011 liquid glass thermometer for work;

  ● JJG 978-2003 high precision mercury glass thermometer for petroleum;

  ● JJG 310-2002 pressure thermometer;

  ● JJG 226-2001 bimetal thermometer;

  ● jjg115-1999 standard copper copper nickel thermocouple

  ● JJG 75-1995 Standard Platinum Rhodium 10 platinum thermocouple;

  ● JJG 368-2000 copper copper nickel thermocouple for work;

  ● jjg1098-2003 calibration specification for thermocouple and thermal resistance automatic measurement system

   technical indicators

  ● parasitic potential of scanning switch: ≤ 0.4 μ V；

  ● accuracy:

   uncertainty of potential measurement ≤ 0.01%;

   uncertainty of resistance measurement ≤ 0.01%;

   uncertainty of galvanic couple verification ≤ 1.2 ℃;

   thermal resistance verification uncertainty ≤ 0.05 ℃;

   potential measurement error: ≤± 0.005%;

   resistance measurement error: ≤± 0.01%;

  ● resolution: potential: 0.1 μ V； Resistance: 0.1M Ω;

   temperature control accuracy: when verifying the thermocouple, the temperature deviation from the verification point shall not exceed ± 5 ℃;

   the temperature deviation from the verification point shall not exceed ± 2 ℃ when verifying the thermal resistance

   constant temperature stability: after the constant temperature of thermocouple verification process, the change rate of furnace temperature ≤ 0.2 ℃ /min; After the thermal resistance verification process is constant temperature, the temperature change rate of the oil tank is ≤ 0.04 ℃ /10min;

  ● verification temperature:

   thermocouple (300 ~ 1200) ℃ any 5 ℃ point;

   thermal resistance (0 ~ 300) ℃ any 10 ℃ point;

  ● number of verification: 1 ~ 10 thermocouples can be verified at the same time, and multiple batches of verification at the same temperature point are allowed;

  ● graduation numbers of verifiable thermocouples: s, K, e, R, B, t, N, J;

  ● the graduation number of verifiable thermal resistance: PT100, PT50, pt10, cu100, cu50, BA1, Ba2, G;

  ● power supply: AC power supply 220 ± 22V; 50±1Hz；

  ● total power: n × 2.0kw (n is the number of modules).