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.).