Description
Packaging & Delivery
Lead Time:
|
Quantity(Pieces) |
1 - 1 |
>1 |
|
Est. Time(days) |
15 |
To be negotiated |
Specification
Main performance characteristics
The advanced operation mode is programmed with Windows software and runs completely under Win95 / WIN98 / winme / Win XP operating platform. It is fully in line with the operating habits of Windows environment, with windows interface, pull-down menu, using mouse to select input parameters and process operation. It is powerful, convenient, flexible and quick to use.
High degree of automation, automatic temperature control, automatic verification, automatic data processing, automatic printing of various verification records and certificates.
Advanced six and a half high precision digital meter is selected for high precision and high resolution. The accuracy is 0.005% and the resolution is 0.1uv; 0．1m Ω。 In the process of detection, digital filtering and bad value elimination are carried out for the sampled data.
During the verification process, the display displays the temperature curve of the verification furnace (or oil tank, etc.), the temperature of the verification furnace (oil tank, etc.), the temperature of the verification point, the verification process, the temperature of the cold end, and the millivolt value of the temperature control thermocouple (the resistance value of the temperature control thermal resistance)
And verification time.
1.5 complete functions and flexible configuration
It can verify all kinds of base metal thermocouples, precious metal thermocouples and thermal resistance
It can verify two wire system (four wire system) and three wire system thermal resistance
Multiple batches of thermal resistance can be verified at the same temperature point; It can verify 0 ℃ point and 100 ℃ point respectively at different time, and the program can automatically arrange and synthesize the report, which is more suitable for the actual situation of thermal resistance verification and can effectively improve the work efficiency
It has a variety of cold end compensation methods. There are three ways for the operator to choose: zero point, input room temperature and cold end automatic tracking compensation
The compensation wire can be corrected to make the verification result more correct
The temperature point can be set arbitrarily. The thermocouple is between 300 ℃ and 1100 ℃, every 50 ℃; The thermal resistance is between 50 ℃ and 300 ℃: set arbitrarily every 10 ℃
Low temperature thermocouples (50 ℃～ 300 ℃) can be calibrated in oil tank
There are many kinds of interface drivers for digital meters, and the operator can choose from the menu at will, which increases the flexibility of system configuration. 1.6 high precision temperature control, short verification time, using a variety of optimized direct digital control algorithm, and providing multiple groups of different object temperature control parameter selection. Ensure that the temperature change rate in the verification process is less than 0.2 ℃ / min; 04 ℃ / min. Generally, the verification time of thermocouple at each verification point is about 30 minutes, while that of thermal resistance is about 60 minutes.
The verification process, data processing, verification record and verification certificate of thermocouple and thermal resistance are fully in line with the national metrological verification regulation jjg-351-96; JJG-229-98; JJG-141-
2000 and 90 temperature scale publicity and Implementation Manual. In particular, the verification procedure of thermal resistance has been re compiled according to jjg-229-98 regulation.
With the function of system certification test, the system is equipped with the certification test module of thermocouple and thermal resistance verification device itself, which can automatically carry out certification test on the total uncertainty and repeatability error of thermocouple and thermal resistance verification device, as well as the temperature field of verification furnace and oil tank, and sort out and print out the certification report. It is very convenient for the operator to establish the system standard and review the system.
Data management function system is equipped with data file management function, which can store, archive, retrieve and query the verification report. The operator can check or print any verification record report or certificate at any time. The device puts the preview and printing of the report in the excel ~ 'under "Office 97 (2000)". Because of the powerful function of "excel ~" and the convenient and flexible operation method, it makes the preview and printing of the report more handy.
The protection measures are perfect, and the system self check program is available, which can self check the digital meter, main control box, SCR power regulator, special interface card and wire connection. In case of over temperature, broken couple or electric couple short circuit, the system will automatically turn off the thyristor regulator, cut off the heating current and give an alarm.
The hardware design is reasonable, the production process is advanced, the key components are imported components, after strict aging and inspection before leaving the factory. The thyristor power regulator can provide three power regulating outputs. It is convenient for the operator to transfer different temperature control objects.
Main technical specifications
Scanning switch parasitic potential ≤ 0.4uv
resolving power
The resolution of potential measurement is 0.1uv
The resolution of resistance measurement is 0.1M Ω Accuracy
Potential measurement uncertainty ≤ 0.0l%
Resistance measurement uncertainty ≤ 0.01%
The uncertainty of thermocouple verification is less than or equal to 1.2 ℃ (including the annual change of second-class standard thermocouple of 0.7 ℃)
Thermal resistance verification uncertainty ≤ 0.05 ℃
Stability of constant temperature
The change of furnace temperature after constant temperature during thermocouple verification is ≤ 0.2 ℃ / min
The change of oil tank temperature after constant temperature in the process of thermal resistance verification is ≤ 0.04 ℃ / min
When the cold end temperature is (20 ± 10) In the range of 0 ℃
Compensation error ≤ 0.2 ℃ 3.6 verification temperature: thermocouple 300 ~ 1100 ℃, thermal resistance 0 ~ 300 ℃ (including low temperature thermocouple) 4
Verification number: 10 thermocouples can be verified at the same time
One to 10 thermal resistances can be tested at the same time, and multiple batches of thermal resistances can be tested at the same temperature.
One time continuous verification point: 6 thermocouples and 3 thermal resistances
Verification time: thermocouple verification, under normal conditions, about 30 minutes per Baidu.
Working environment: ambient temperature 20 ℃ ± 3℃
Relative humidity ≤ 75%, power supply: AC 220V ± 10％50 ± 1HZ
The grounding resistance is required to be ≤ 4 Ω Hardware configuration of the system
The device consists of high-precision digital multimeter, main control box, SCR power regulator, microcomputer system, thermostatic device (verification furnace and oil tank), measuring wire and communication wire,
Microcomputer system
The microcomputer system is mainly used for process control, data processing and printing reports and certificates. Configuration of microcomputer system: Pentium II, 32m ram, 4.3G, CD-ROM. Serial port. If GP-IB communication is used, an IEEE-488 card should be inserted. It is equipped with operating system above Windows 95.
High precision digital multimeter
High precision digital multimeter is mainly used for electrical measurement and analog-to-digital conversion. High precision imported digital meter with more than 61 / 2 bits is adopted.
