ASTM D971 Automatic Interfacial Tension Tester
Introduction:
GD-6541A Automatic Interfacial Tension Tester is designed and made as per the National Standard of People's Republic of China GB/T6541-86 (1991) "Test Methods for Interfacial Tension of Oil against Water by the Ring Method". It is suitable to determine the interfacial tension between mineral oils and water under non-equilibrium condition (Liquid-Liquid interface). It can also be used to determine interfacial tension of various liquids (Liquid-Gas interface).
GD-6541A Automatic Interfacial Tension Tester adopts large LCD screen and blank button, so it is automatic, reliable, and simple and with good repeatability. Turn on the instrument and operate the instrument as per the prompt of menu, and you can complete the test as per the prompt. The instrument has function of automatic temperature compensation, clock control, printing, and automatic average value calculation. It can connect to a computer through RS232 interface. You can also send the test data to a handheld computer for analysis. It is the best choice to make determination for interfacial tension test.
Main Features:
1.Color large-screen LCD display, English menu operation, measure the tension value of sample automatically .
2.It has the 25ºC automatic temperature compensation function, it resolved the effect of temperature on the measured tension value.
3.Automatic zero set, determination, calculation and display of Experiment results, it has power-down memory function.
4.It equips with Windscreen, which could reduce the impact on the Analysis results from external.
5.The lifting platform is automatic rising-lowering, stable and good precision.
6.Adopts closed magnetic tank sensor, uniformly-spaced multi-point calibration, which enhanced the repeatability and reproducibility of analysis results.
7.It is autonomous working, also it could be connected with laptop and microcomputer via USB and RS232 interface, then realize Network-management.
8.When revise national standards, the program of instrument can be upgraded.
Working principle
The working principle of the GD-6541A Automatic Interfacial Tension Tester is described as follows: It applies the high frequency induction, tiny displacement self-balance measurement system to the torque balance. When the force applied to the platinum ring changes, the balance rod connected to the platinum ring will appear displacement between two eddy current probes. Then the inductance values of two eddy current probes change. The differential transformer will lose its balance and the input signal of differential transformer amplifier in the circuit will lose its balance, too. It will send a group of electric signal, which will change with the force applied to the platinum ring, after magnification by the amplifier. The electric signal will be sent to microcomputer for process and be used to calculate the real interfacial tension of the measured sample as per GB/T6541.
Main Specifications:
| Display method |
The large LCD display with backlight, Chinese menu, Chinese menu in all tests and calculations compiled in content GB / T 6541 standard |
| Button |
Under Chinese menu prompts unmarked buttons |
| Measuring range |
power with an insulating oil (2-100) mN / m |
| other petroleum products (2 ~ 200) mN / m |
| Sensitivity |
0.1 mN / m |
| Accuracy |
0.1 mN / m |
| Resolution |
0.1 mN / m |
| Repeatability |
0.3% |
| Applicable temperature |
(10 ~ 30) ºC (TYP: 25 ºC) |
| Applicable humidity |
(20 ~ 75) % RH |
| Power supply |
AC 220V±10%, 50 Hz |
| Power |
less than 100W |
| Dimensions |
185* 260*360mm |
| Net weights |
15 kg |
Packing List
| No. |
Name |
Unit |
Quantity |
Remark |
| 1 |
Main unit |
Set |
1 |
|
| 2 |
Controlling magnet |
Piece |
1 |
|
| 3 |
Ring rod |
Piece |
1 |
|
| 4 |
Platinum ring |
Piece |
1 |
|
| 5 |
Sample cup |
Piece |
1 |
|
| 6 |
Weight |
1g |
Piece |
1 |
|
| 100 mg |
Piece |
1 |
|
| 200 mg |
Piece |
2 |
|
| 500 mg |
Piece |
1 |
|
| 7 |
Power supply wire |
Piece |
1 |
|
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