GOM804\/805 is a new generation of DC micro ohmmeter, which uses 3.5\" TFT display, maximum 50,000 counts measurement display, fast sampling rate of 60 strokes per second, measurement accuracy of 0.05%, 4-wire measurement, temperature and temperature compensation measurement, 20 sets of panel setting memory; GOM-805 is also equipped with various drive modes and dry circuits to meet the needs of low voltage or low power resistance measurement applications. The GOM-805 is also equipped with a variety of drive modes and dry circuits to meet the needs of low voltage or low power resistance measurement of components or materials. The entire series is equipped with external control interfaces such as RS-232C, USB, Handler \/ Scan \/ EXT IO or GPIB (optional), which further enhances the convenience of the ohmmeter in practical operation.<\/p>\n
GOM-804\/805 adopts 3.5-inch color LCD display, which makes the measurement results clearer and easier to read, and also increases the display of related setting conditions, which greatly enhances the completeness of the test information.GOM-804\/805 increases the measurement speed to 60 strokes per second sampling speed, and still provides 0.05% accuracy, and the number of digits of the display will not be reduced to 4 digits due to the choice of speed. Moreover, the number of display digits will not be reduced from the original 5 digits to 4 digits due to the speed selection. In addition, the use of independent function buttons and arrow keys enhances the convenience of operation, allowing the user to complete all measurement tasks more intuitively and conveniently.<\/p>\n
In addition, the GOM-805 provides dry circuit and various drive modes (DC+\/DC-, pulse, and pulse width modulation) for measurement of different types of materials. When conductors of different materials come into contact with each other, the potential difference due to temperature changes can be minimized by using the pulse current output mode, which reduces the effect of the thermo-electric potential during low-resistance measurements. The DC+\/DC- current output mode is suitable for measurement of inductive components. The pulse width modulation output mode is suitable for materials that are sensitive to temperature changes, and can avoid resistance changes caused by prolonged measurement current loading. When using DC +, DC - and pulse drive mode, can also be used with dry circuit (Dry circuit) for measurement; dry circuit can be limited to a maximum of 20mV of open circuit voltage, in order to avoid the components of the voltage is too high, damage to the surface of the contact point of the oxidation layer or thin film, and thus undermine the validity of measurement, such as connector contact resistance measurement, is a typical application.<\/p>\n
In terms of connecting to external control, the GOM-804\/805 provides a D-sub 25-pin composite interface, which can be used to perform specific operations according to the choice of function, such as Handler or Scan or EXT IO, which provides connection to a sorter, external switch or direct external trigger control, respectively; and lastly, for the demand of remote control and capture of measurement results, the GOM-804\/805 also provides a variety of interface options, such as RS-232C, USB and GPIB (GOM-804 optional\/GOM-805 standard) interfaces; at the same time, the control of the interface is also available. 804\/805 also provides a variety of interface options, such as RS-232C, USB, and GPIB (GOM-804 optional\/GOM-805 standard) interfaces; at the same time, the control commands are fully compatible with the original GOM-802, so that users do not have to spend more time on program adjustments when replacing the old and new models.<\/p>\n
In summary, the GOM-804 is an evolutionary model that builds on the features and specifications of the original GOM-802, including the number of display digits, measurement speed, and the provision of standard interfaces (RS-232C\/USB), while the GOM-805 adds new measurement capabilities (dry circuits and a variety of drive modes) to meet the needs of a wider range of low-resistance measurement applications.<\/p>\n