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Huazheng HZZL-3 Automatic Transformer Oil Interfacial Tension Tester

The Transformer Oil Interfacial Tension Tester is an indispensable tool for professionals in the power industry, offering unparalleled accuracy and reliability. It operates on the principle of measuring the force required to detach a droplet of oil from a water surface, a key indicator of the oil’s purity and its ability to insulate and cool the transformer effectively. High interfacial tension values typically signify good oil quality, while lower values can indicate contamination or degradation, necessitating timely maintenance or replacement.

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           hzbb-10a_06tgq

    Main functions and features 

    Intermolecular Forces formed liquid surface tension.Numbers of tension  reflect on liquid sample’s physics and chemical properties, it is one of the most important index to product quality. Intermolecular Forces formed liquid surface tension.Numbers of tension  reflect on liquid sample’s physics and chemical properties, it is one of the most important index to product quality.
    1.It used electromagnetic force -balance-type transducer, improving the accuracy of the measurement
    2.Demarcated one point and you can adjust  the instrument, and it's very convenient.
    3.the instrument can show current weight values and tesion Equivalence
    4. Integrated temperature detection circuit, automatic temperature compensation for test results;
    5. 240×128 dot matrix LCD screen, no logo button, with screen protection function;
    6. Historical records with time stamps, store up to 255;
    7. Built-in high-speed thermal micro printer, beautiful and fast printing, with offline printing function; 
    8.the instrument has RS232 interface equipment,it can connect to computer,and it convenient for data processing.

    Technical Parameters

     Measuring range 0-200mN/m

     accuracy0.1%( test result)±0.1 mN/m

     precision0.1mN/m

     sensibility0.1mN/m

     mains voltageAC220V±20%  50HZ±10%

     maximum power dissipation20W 

     suit ambient temperature1030℃(25℃the best)

     suit ambient humidity≤85% RH

     overall dimensions200×300×330(mm)

     weight6kg

    When the platinum ring is pulled up from the "liquid-gas" interface or the "liquid-liquid" interface, a circular liquid column membrane will be formed under the platinum ring. As the ring continues to rise, the liquid column membrane ruptures. In this process The maximum force value detected by the electromagnetic force balance sensor is converted into the tension value by the following formula.
    M=mg/2L   L= Pt circle’s circumference
    The test value will effect by many factor:
    (1)Pt circle’s average radius and the Pt wire’s radius
    (2)Liquid sample and other medium’s density contrast
    (3)The purity of the liquid, the electrolyte impurities will seriously reduce the tension value.
    (4)Ambient temperature.
    Since the liquid column formed at the platinum ring is not cylindrical, a correction factor F must be introduced. The calculation formula for the correction factor F given by Zuidema and waters:
    The final result after correction is::
    In the formula:
    P0------ Lower liquid density, unit: g/mL
    P1------Upper liquid density or gas density, unit: g/mL
    Rs------the average radius of platinum wire, unit: mm
    Rh------average radius of platinum ring, unit: mm
    In summary, the Transformer Oil Interfacial Tension Tester is an essential instrument for maintaining the efficiency and reliability of electrical transformers. Its precision, ease of use, and robust design make it a valuable asset for any professional in the power industry, ensuring that your transformers operate at peak performance and remain in optimal condition for years to come.

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