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Resistors in Analytical Equipment And Instrumentation

Resistors in Analytical Equipment And Instrumentation

Precision resistors deliver the tight tolerances, low temperature sensitivity, and high stability demanded across a broad range of laboratory analysis equipment . The input stage of an instrument with a resistive sensor, such as a thermistor in a precision temperature-monitoring circuit, consists of a bridge of resistors, which must be closely matched in value. Since it is the ratio between values that matters rather than absolute values themselves, the maximum difference between TCRs (that is, the tracking TCR) is more impor...

Date:2019-05-24      [More+]
Fixed Resistors' Safety Application Note

Fixed Resistors' Safety Application Note

When the resistors are operated in ambient temperature above the rated temperature, the power rating must be derated according to the derating curve. Resistors in general may emit flame, fire, smoke or red heat when overload is applied. When a power exceeding the rated power is applied in a short time, we can not guarantee the safety only that the average power is below the rated power. Please contact Microhm with the surge voltage or current waveform for advise. Flame retardant resistors may emit smoke or cause red heat when...

Date:2019-05-24      [More+]
Thick-Film Technology Extends The Applications

Thick-Film Technology Extends The Applications

Thick-film resistors best suit the application of linearity , temperature coefficient (TCR), and long-term stability under voltage stress. Their temperature characteristic is typically U shaped with limits expressed by the TCR, normally from 25 to 100 ppm/C. The TCR error can be reduced by choosing the highest-possible ohmic value, which lowers self-heating, and by designing layouts that avoid proximity to heat-generating components. The temperature coefficient of thick-film resistors typically exhibits a classic U shape. To ...

Date:2019-05-23      [More+]
Current Sense Resistors' Work Principle in Automotives

Current Sense Resistors' Work Principle in Automotives

Current sense resistors are recognized as cost-effective components that help improve system efficiency and reduce losses due to their high measurement accuracy compared to other technologies. Global trends such as the demand for lower CO2 emissions, the smartening of the electricity supply grid and the electrification of our automobiles are all driving the need for electronic circuits to become more efficient. For circuit designers and systems operators, understanding what level of current is flowing through a circuit and be...

Date:2019-05-23      [More+]
Resistors' Selection For Medical Applications

Resistors' Selection For Medical Applications

Passive components, like resistors, are hard to be chosen as the regulations and the unique characteristics of the healthcare environment. Since the human body is intrinsically analog, though, there will always be an important role for highly reliable passive components, like resistor, in systems including diagnostic, imaging, patient monitoring, instrumentation, and pharmaceutical delivery and dispensing applications. Approximately 20 passive components, resistor for example, are needed for each active IC in a design. AEDs p...

Date:2019-05-22      [More+]
Shunt Resistors' Main Paramaters

Shunt Resistors' Main Paramaters

Shunt resistors is primarily used to measure current. However, the meaning of the term shunt in electronics is broader than that. A shunt is an element that is used in a circuit to redirect current around another part. The areas of application vary widely. For some applications, electrical devices other than resistors can be used. A few examples are given to illustrate the diversity of shunts. Several parameters are important to specify a shunt resistor. Shunt resistors have a maximum current rating. The resistance value is g...

Date:2019-05-20      [More+]
High-voltage Resistors Application and Features

High-voltage Resistors Application and Features

High-voltage resistors are used for office equipment and home appliances such as printers, copying machines, and air-conditioners. Offering high resistance and small deviation values, Microhms products enable reduced set circuit signal inconsistencies and more reliable final products. One of the role of resistors in a circuit is detecting high voltage by voltage dividing. Rated voltage and maximum working voltage are specified for each resistor, which should not be exceeded when it is used. Plural resistors have to be used in...

Date:2019-05-20      [More+]
Resistor solutions within inverter applications

Resistor solutions within inverter applications

Inverter power resistor applications probably require filter resistors, gate resistors, snubbers, balancing resistors, bleeders, voltage dividers, braking/regenerative braking resistors, power factor control, pre-charge resistors, surge current protection, and even current shunts. Here we discuss the various resistor solutions. Microhms expansive line of wire wound resistors work exceptionally well for use in the high energy locations in the diagram such as braking and surge current protection. The NUAL series offers high po...

Date:2019-05-17      [More+]
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