Product description

NM-01 thermocouple thermal resistance automatic verification system consists of computer, multi-channel scanner, high-precision digital meter, three-wire resistance converter/junction table, thermocouple verification furnace, intelligent precision temperature control device, water (oil) tank, standard device, freezer, etc. The system takes the computer as the core, controls multi-channel scanners, high-precision digital meters and constant temperature equipment, etc., and automatically completes the verification of thermocouples, thermal resistances and thermometers. The system functions and technical indicators fully comply with the requirements of JJF1098-2003 "The Calibration Specification for Thermocouple and Thermal Resistance Automatic Measurement System".

Scope of application

Thermocouple thermal resistance automatic verification system is widely used in aviation, aerospace, electric power, petroleum, chemical industry, metallurgy, steel, pharmaceutical, measurement, military, universities and other industries and many scientific research institutions. Automatically complete thermocouple (S, R, B, K, N, J, E, T, EA-2, etc. graduation numbers), thermal resistance (pt10, pt100, Cu50, Cu100, pt-X, Cu-X), Metrological verification/calibration of bimetal thermometers, pressure thermometers, liquid-in-glass thermometers, etc.

Compliance with regulations

Features

☆The scanning switch adopts a large area of ​​silver-coated material, and the parasitic potential is less than 0.2uV.

☆The scanner and three-wire resistance converter/connector all use specially processed low-potential binding posts, which reduces the parasitic potential from front-end wiring to data acquisition.

☆The combination design of three-wire resistance converter and terminal block is compatible with the wiring of thermocouple, two-wire thermal resistance and four-wire thermal resistance, and can automatically complete the switching function of three-wire thermal resistance verification, eliminating the inner lead of three-wire thermal resistance resistance.

☆The tailor-made special bench for the calibration furnace is convenient for the user to install the furnace, wire and other operations.

☆Freezing point compensation or room temperature automatic compensation can be used for reference end compensation during thermocouple verification.

☆The calibration furnace and constant temperature tank use intelligent instruments to automatically control the temperature, and the constant temperature equipment can quickly reach the set temperature without overshoot. Through computer communication, the temperature point can be automatically switched during the verification process without manual intervention.

☆The temperature control adopts photoelectric isolation, high precision, AC zero-crossing trigger solid state relay, which reduces the interference of the temperature control part to the verification system itself and the power grid.

☆The system software displays the set temperature, actual temperature, temperature change rate, verification working time, temperature record curve and other status information in real time during the verification process.

☆The system software has the function of power failure protection, and the verification can be continued after the power supply is restored.

☆Automatically generate verification data record sheet, verification certificate or verification result notification. Table format users can design their own according to requirements.

☆The data records are stored in the database, which can be easily inquired about the data records and output the verification data. Provides database management operations such as database backup and database clearing.

☆Independent development, completely independent intellectual property rights, software upgrade is guaranteed.

Technical parameter

☆Scan switch parasitic potential: ≤0.2µV

☆Accuracy (Keithley2000): Potential measurement error: ≤±(0.005%*Reading+0.0035%*Range) Resistance measurement error: ≤±(0.01%*Reading+0.0035%*Range)

(Keithley2010): Potential measurement error: ≤±(0.0037%*Reading+0.0009%*Range) Resistance measurement error: ≤±(0.0052%*Reading+0.0009%*Range)

☆ Resolution (Keithley2000): Potential: 0.1µV Resistance: 0.1mΩ (Keithley2010): Potential: 0.01µV Resistance: 0.01mΩ

☆Temperature control accuracy: The temperature deviation from the verification point when calibrating thermocouples does not exceed ±5℃; when verifying thermal resistance, the temperature deviation from the verification point does not exceed ±2℃.

☆Temperature control stability: thermocouple calibration furnace≤0.2℃/6min; constant temperature bath≤0.02℃/10min.

☆Verification temperature range: -100℃~1600℃ (Users can choose constant temperature equipment according to their needs)

Taian Nimeng Electronic Technology Co., Ltd. is a manufacturer of thermocouple thermal resistance verification systems, thermocouple verification furnaces, temperature and humidity verification boxes, forehead temperature gun calibration devices, and precision dew point meters. Welcome to cooperate and negotiate!