Thermal automatic temperature calibration system

Thermal automatic temperature calibration system

The thermal automatic calibration system is one of the fourth generation thermal automatic calibration products newly developed by our company. It is a new generation product developed entirely in the Windows environment using the language of the Windows environment. The system is centered around a high-end microcomputer, equipped with a high-precision imported digital multimeter, as well as a measurement and control system consisting of a low potential scanning switch, power regulator, and other components. The operator can easily operate the entire process with a mouse under the Chinese Win95/Win98/WinMe operating system, and the microcomputer system displays the temperature control curve, temperature, and calibration time parameters of the calibration furnace (or oil tank, etc.) in real time.

Detailed information:

Specification

★ Temperature range for verification

Thermocouple 300 ℃~1100 ℃; Thermal resistance: 0-300 ℃.

★ Verify the types of thermocouples and thermal resistors

Thermocouples for work: S, K, E, J, N, EA2, B, T (U, L) types;

Thermal resistors for work: nine models including Cu50, Cu100, Pt10, Pt100, etc.

★ Accuracy

The accuracy of voltage measurement is better than 0.02, with a resolution of 0.1 μ V.

The accuracy of resistance measurement is better than 0.02, with a resolution of 0.1m Ω.

Parasitic potential of each measurement channel ≤ 0.4 μ V.

Constant temperature equipment * high heating rate: tube type calibration furnace<30 ℃/min; Oil tank temperature>2 ℃/min.

★ Temperature control accuracy

The turbidity of the tube type calibration furnace deviates from the preset calibration point by ≤± 5 ℃;

The temperature deviation of the oil (water) tank from the preset point is ≤± 1.5 ℃.

Temperature stability inside the furnace (tank) during calibration and measurement

Tube type calibration furnace temperature ≤ 0.2 ℃/min and ≤ 0.5 ℃/10min;

Oil tank temperature ≤ 0.02 ℃/min and ≤ 0.04 ℃/10min.

★ Automatic compensation for cold end temperature

When the cold end temperature is within the range of 20 ± 10 ℃, the compensation error is ≤ 0.2 ℃.

The detection time for each verification point is about 1.5 minutes.

The uncertainty of the verification result (including the error of the standard instrument, with a confidence probability of 99.8)

Thermocouple: ≤ 1.2 ℃, repeatability error: ≤ 0.2 ℃ (at 600 ℃).

Thermal resistance: ≤ 0.05 ℃, repeatability error: ≤ 0.012 ℃ (at 100 ℃).

★ Verification quantity

Thermocouples: 6 (including 1 standard thermocouple);

Thermal resistance: 6 units (including 1 standard thermal resistance unit).

The detection data processing is carried out in full accordance with the current national metrological verification regulations and specifications.

★ Anti interference performance

Serial mode ≥ 46db; common mode ≥ 100db.

★ Working environment

Temperature range: 0-40 ℃. When the room temperature exceeds (20 ± 5) ℃, temperature correction should be performed. Relative humidity<70.

★ Working power supply

220V ± 10AC, 50Hz, with good grounding wire (grounding resistance<5 Ω).

★ Power consumption

Tube type calibration furnace: 2KW; oil (water) tank: 4KW.

Detection system: 500W (including microcomputer system).

★ Other supporting equipment

Refer to JJG35-96 and JJG229-98 for the indicators of the calibration furnace and oil (water) tank. Thermocouples shorter than 400mm should be selected

The calibration furnace.

to configure:

★ One ice crusher.

★ A set of specialized software.

★ One tube type calibration furnace.

★ Three dedicated I communication cables.

★ One oil tank (water tank) (optional when ordering).

★ One freezer (ice bottle) (with seven test tubes attached).

★ One temperature sensor for automatic compensation at the cold end.

★ One dedicated I/O and IEEE488 connection card.

★ One second-class standard thermocouple (S-type). (Optional when ordering)

★ One second-class standard platinum resistance thermometer.. (Optional when ordering)

★ One thyristor voltage regulator (three outputs: calibration furnace, oil tank, water tank).

★ One host (61/2 digital multimeter, 10 × 4 scanner, I/O interface).

A set of computer (including host, keyboard, mouse, VGA color monitor, printer, etc.).