Technical Parameters and Performance Characters for MC-TD3500 x-ray Diffractometers  

Introduction of the Company and Products

Our company is specialized to produce x-ray products. Its main products are x-ray analysis equipments and x-ray NDT equipments.

X-ray analysis equipments include x-ray diffractometer, x-ray crystal analysis equipment and x-ray crystal direction finder. The design of x-ray diffractometer (TD series) is unique in China as it combines the advantages of programmable controller technique and ideas of module design. The application of triple non-intrusive isolation protection program gives the product with high performance, long life expectance and low frequency failure. The TD series x-ray diffractometers are welcomed by many institutes, universities and other manufactories with its advanced controller, excellent data-processing software and accurate testing results.

In order to meet some special requirements for those users who involve in the production of titanium dioxide, our company specially developed the program focusing on the measurement of titanium dioxide. Through 3 times of continuous scanning to the samples, this program could measure the content of rutile in 4 types of samples (error range <0.2% ), including ilmenite, rutile, anatase and imported slag.

Compared with the X-ray diffractometer from other companies, the products of our company, our TD series, have the following advantages:

1. X-ray Generator:

Imported PLC control circuit is applied in lieu of single-chip control unit. This significantly reduces the equipment failure rate and increases the stability and reliability of equipment. Imported PLC programmable controller greatly improves the power of X-ray generator, which meets the special needs from some users who require the high-power X-ray generator for testing special samples. Compared with our products, the products from other companies are still using single-chip control unit, which makes the equipments with more complex structure and higher failure rate. The biggest drawback is that their equipments can not run stably in a long time at high-power scope (1.6KW and above). High-pressure control unit and the management system achieve the electrical isolation (isolating voltage> 2500V). The PLC module provides reliable management and real-time monitoring towards high-pressure control unit and the information is monitored by a real-time screen through the touch panel. As photoelectric isolation technology is applied in all I / O interface modules, so between the outside high-voltage generator circuit and control panel, the electrical isolation is really applied. For each of the modules, shielding measures are also used to prevent the radiation interference.

2. recording control system (the core of the diffractometer):

Based on the Philips technology, the diffractometer takes use of imported PLC (Programmable Logic Controller) control circuit instead of the original single-chip control circuit device. This improvement makes the instrument control system more stable, easier to control, and more structurally compact. The application of the imported Siemens PLC control circuit, which is of high degree of automation, ensures a longtime and stable operation of the whole system.

Compared with the products from other companies using the single-chip circuits, our diffractometers have the following advantages:

1) It owns the simple management for the circuits so that it is easy to debug and install. It only contains a Siemens PLC system and two highly integrated circuit boards. Besides, Most of the operations, such as rotating goniometric control, computer interface, X-ray generator control and signals collection, are controlled by software. This greatly simplifies the hardware system and reduces the failure rate of the system. Compared with ours, other diffractometers’ recording control systems are still using complex single-chip circuit, which makes debugging and repairing more difficult. Besides, their instruments have high failure rate and complicated structures. Most of their products contain 16 single-chips circuit board and some components, like integrated chips, are still taking Philips technology in 1970s.

2) The system is very easy to maintain due to its modular design. Users can achieve the maintenance and debugging independently without the supervision of technical personnel.

3) The use of advanced real color touch screen provides special functions, such as human-computer interaction, full protections and easy operations. The three-dimensional animation design makes the operating process more user-friendly and more intuitive. It is easy for operators to use the instruments and also, can help them to find useful information when problem happens.

4) It greatly improves the stability of the calculation system, thereby enhancing the comprehensive stability of the whole instrument.

5)The powerful extendable capacity of PLC can easily introduce many other multi-function attachments without applying additional hardware.

6) The instruments apply a unique high-voltage safety device to control the voltage during the process of sample testing. For example, when users test the sample at 40Kv, 40mA, the safety device will automatically reduce the voltage to 30kV, 20mA. When the lead door is open, the voltage automatically reduces to 10kV, 5mA. When the lead door is closed, the voltage automatically rises up to 30kV, 20mA. The Opening and closing of the shutter is consistent with that of lead door. If the lead door is accidentally opened in the process of data collection, the shutter will be turned off automatically. At the same time, the voltage goes down to 10kV, 5mA and data collection stops. The data collection will continue if the door is then closed

3. Our company uses Philips high-performance proportional counter. The counter is stable, powerful and has a good resolution. It greatly improves the repeatability of samples and accuracy of measurement.

4. The goniometer uses imported high-precision bearings. This design assures the precision of measurement of the instrument, and also increases the life-span of the goniometer. The goniometer’s movement depends on a servo system of high-precision closed-loop vector driver, which contains a 32-bit RISC microprocessor. High-resolution magnetic encoder automatically adjusts even tiny position error. The reproducibility of the angle reaches to 0.0005 degree and the minimum stepping angle reaches to 0.0001 degree.

5. It is available to a variety of diffraction attachments with different functions (such as integrated measurement attachments). This extends the applications of the diffractometer.

6. The data files output from TD Series diffractometers is in line with international standards. Hence, the data files can be processed either in the company's self-developed software or in the imported software.

7. The company introduces the most advanced international data-processing software. It has a very powerful function and is currently the updated version.

8. It is equipped with powerful water-cycle cooling split-type refrigerator to reduce the room-in noise and extend the life-span of X-ray tube.

1. The vertical-structure goniometer facilitates sample’s preparation and becomes more user-friendly. The development of θ-θ goniometer successfully meets the additional requirements from users who need to test special samples, such as liquid samples, the sol-state samples, viscous-type samples, loose powder and bulk solid samples.