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diagram showing shower tub diverter with brass or copper

author:MF manufacturerstime:2022-03-14 11:41:33

Splitter is mainly used to measure DC high current,Is a high precision value resistor made of manganese copper alloy,Virtual value is small,This resistance is also very small.,The thermoelectric potency of copper is small,Allow high DC current;Thermal potential is a useful signal on the thermocouple,The source is the source of the shunt,Main factors affecting the accuracy of shunt。

(diagram showing shower tub diverter with brass or copper)Traditional splitter is an outer attached shunt resistance as a magnetoelectric current table,There are various specifications in current tables.,But the actual head is a standard millivolt voltmeter.,Commonly used standardized schemas75mVMillivast,That is, the splitter has75mVPressure drop,Current table will be full。Magnetoelectric head is shown in Figure 1。To match a variety of display instruments,Various specifications of splitter,When flowing through the nominal current,Allocate75mV,Such as300A/75mV、500A/75mVWait,The dial scale is rated according to the splitter(Nominal current)Divided。Currently0~75mVHas become multi-function display and industrial regulators(Digital controller)One of the standard analog input signals,and0~10V、0~20mA、4~20mASimple has similar properties。

(diagram showing shower tub diverter with brass or copper)

diagram showing shower tub diverter with brass or copper(diagram showing shower tub diverter with brass or copper)Figure one

Splitter measuring current,Similar four-wire resistance measurement,Principle,The physical quantity is not the same。Distortion resistance is fixed,The current flowing is proportional to the splitter pressure drop,Be satisfiedU=IR ,Reflecting the size of the current by voltage。

To eliminate errors caused by lead resistance and contact resistance,Distant multi-port structure,Figure 2,Big bolts on both ends are current connection terminals,Inner side twoM4orM5Small screws are potential terminals,The resistance between the potential end is the standard resistance of the shunt,The voltage between the potential end is the sampling voltage,It is proportional to current flowing through the substrate,When flowing over rated current value,The voltage between the potential end is75mV 。The gap may have more than one in the shunt resistance,This is the manufacturer to deliberately cut off for precise calibration resistance.,Not a defective product。Manufacturer production shunt,Will design the resistance value,Calibrate with high precision resistance measuring instrument,Cut some small gap,Gradually increase resistance,Did to approximate standard values。

(diagram showing shower tub diverter with brass or copper)

diagram showing shower tub diverter with brass or copper

Figure II

(diagram showing shower tub diverter with brass or copper)0~75mVSampling voltage is DC voltage,Have polar,The end of the current flows into the shunt is a positive potential terminal.,Connection instrument positive signal input;The end of the current flow out shifter is a negative potential terminal,Connection meter simulate ground or negative signal input。Figure three、Figure 4。


diagram showing shower tub diverter with brass or copper(diagram showing shower tub diverter with brass or copper)Figure three

When the shunt is used with the magnetoelectric pointer current table,Signal cable should be a pair of deflective value for a set of current tables;Distractive sampling voltage If the signal is input as a digital meter,Use ordinary wires,This is because the digital instrument input impedance is very high.,Wire resistance is negligible。

Millivolt signal,Still more susceptible to interference,Distance between the splitter and the instrument is as short as possible。When the signal is transmitted for long distance transmission,First0~75mVSignal linear transformation is4~20mASignal,Boot it to accept4~20mAInstrumentation of analog signal。Figure 4。

diagram showing shower tub diverter with brass or copper

Figure four

Hall current sensors can also be used to measure current,However, the splitter has a unique advantage in durability and stability.。