(1) Resistance shunt: It is actually a resistance with a very small resistance value, when there is a current passage period, according to Ohm's law, the voltage occurs in the resistance, and the current size is known according to the measured voltage value. The resistance shunt has high precision, fast response, low cost, simple use, and the disadvantage is that the equipment itself is not blocked, and the power consumption is large when measuring large currents;
(2) Current transformer (CT): The current transformer is based on the principle of electromagnetic induction, converting the primary side large current into the secondary side small current to measure and protect the equipment, its primary side winding turns are very small, the wire diameter is thick, and the primary side is connected in series in the line that needs to measure the current, and the secondary side is forbidden to open the circuit. The advantage of the current transformer is that it has an electrical barrier, and the disadvantage is that it can only measure the AC circuit;
(3) Hall current sensor: including open-loop Hall current sensor and closed-loop Hall current sensor, closed-loop Hall current sensor expands the output voltage of Hall equipment, and then after the current is expanded, the current passes through the compensation coil, and the magnetic field generated by the compensation coil is opposite to the direction of the magnetic field where the measured current occurs, and the original magnetic field is compensated, so that the output of Hall equipment is gradually reduced, so that the Hall equipment operates at zero magnetic flux. Open-loop Hall current sensor, when the primary current IP flows through a long wire, a magnetic field occurs in the toroidal core, the magnitude of this magnetic field is proportional to the current flowing through the wire, the magnetic field is collected in the magnetic ring, and the output is measured and enlarged by the Hall element in the magnetic ring air gap, and the output voltage reflects the primary current proportionally.
|
More on that
|
Features of the ifm pressure sensor type PN
ifm pressure sensors of type PN are used in industrial applications:
One is robust: an ideal measuring element for all types of pressure scales;
Second, red-green scale: according to the color of the display, you can quickly identify the "outstanding scale" or switching state;
The third quick setting: by pressing the ...
|
|
The ifm JD series is a precision inclination sensor for dynamic applications
Axes and 2-axis as well as sensors with 6 degrees of freedom respond quickly and with high signal quality at pole conditions
1-axis and 2-axis as well as inclination sensors with 6 degrees of freedom
The fusion algorithm of the innovative sensor can ensure the rapid call...
|
|
Three major load cells – ifm sensors
1. Resistance strain gauge
The resistance strain gauge is a resistance wire mechanically distributed on a substrate made of organic materials, that is, it becomes a strain gauge. An important parameter for him is the sensitivity coefficient K. When his ends are subjected to the F force, they will elongate, that is, they will be deformed. ...
|
|
Precautions for the use of resistive load cells – ifm
(1) When the strain limit increases with the strain, the nonlinearity of the output of the strain equipment increases, and the error reaches 10%, the strain limit of the strain equipment is general.
(2) After the mechanical hysteresis sensitive grid, subbase and adhesive layer are subjected to mechanical strain, they will generally ...
|
|
Wireless sensor problems and solutions – ifm
1. After the wireless sensor device is installed, it appears to be beating or the number is inaccurate
Reason: There is electromagnetic interference on the site, or the signal line and the power line go to the same trunking.
Solution: The product function selected by the customer does not meet the on-site working conditions, and it needs to be installed or replaced.
|
|
ifm wireless sensor analysis
1. After the wireless sensor device is installed, it appears to be beating or the number is inaccurate
Reason: There is electromagnetic interference on the site, or the signal line and the power line go to the same trunking.
Solution: The product function selected by the customer does not meet the on-site working conditions, and it needs to be installed or replaced.
|
|
Ifm flow sensors ensure safety
Ifm flow sensors ensure safety
Specially developed for monitoring the fresh air and exhaust of machines
Optimized performance is achieved through special air conditioning
Rugged probes for demanding applications
2-in-1: Flow rate and temperature ...
|
|
Common faults and maintenance methods of IFM pressure sensors
1. When the pressure goes up, the output of the transmitter can't go up
In this case, you should first check whether the pressure interface is leaking or blocked, if you confess that it is not, check the wiring method and check the power supply, if the power supply is normal, then briefly pressurize ...
|
|
Correct use of the high-temperature pressure sensor method – ifm
1. It is necessary for the sensor to be properly installed
Damage to high-temperature pressure sensors is usually caused by their installation in improperly machined holes. When the sensor is loaded into a hole that is too small or eccentric, the sensor diaphragm may be damaged, which can then cause the instrument to not function properly.
Can...
|
|
ifm flow sensor solutions
ifm flow sensor solutions. IFM Flow Sensor SV5200, Vortex Flow Sensor with User Friendly Display, Circuit Connection Can Be Rotated for Optimal Arrangement, With Switching Output or Frequency Output, and IO-Link for Reliable Flow Detection ...
|
|
The ifm is equipped with an intelligent multifunction display with IO-Link
Decentralized processing of signals, good readability of different process parameters and freely selectable scale factors
Clear, easy-to-read display
It can be equipped in different formats via IO-Link or the setting menu
Beyond or without reaching ...
|
|
Wireless sensor network implementation method – ifm
1. Traditional communication protocol flooding. The message is sent to a nearby node in the form of a broadcast, and the node that receives the information continues to broadcast in the same way until the audio reaches its destination.
Pros: Simple and easy to do, no maintenance required.
Cons: A certain node may ...
|
|
Precautions for sensor installation – ifm
Temperature sensor
1. The sensor should be firmly grounded, and the wire side of the sensor should not be short-circuited.
2. The thermistor of the moving magnet water thermometer sensor will increase with the temperature and the resistance value will decrease.
Fuel level sensor
...
|
|
Failure analysis of the ifm pressure sensor PN2071
1. ifm sensor PN2071 pressure up, sensor output can not go up in this case, first should check whether the pressure interface is leaking or blocked, if you admit that it is not, check the wiring method and check the power supply, if the power supply is normal, then simply pressurize to see if the output changes, maybe observe ...
|
|
Measuring pre-work with vibration sensors – ifm
1. Confirmation of the initial void
The various types of oscillating sensors should have excellent linearity at a certain void voltage value, so it is necessary to adjust the appropriate initial void when installing the sensor.
According to the characteristic curve of the oscillation sensor, the sensor used for oscillation measurement ...
|
|
Vibration sensors are selected according to the parameters – ifm
The use of oscillation sensors in various fields is also a lot, with the development of the market economy, the demand for sensors is increasing, but many people are not professional when purchasing, in order to prevent the purchase of undesirable products, how to choose when we choose the sensor? ...
|
|
Sensors, temperature sensors, RTDs and thermocouples – ifm
RTDs and thermocouples are the most commonly used temperature sensing elements for temperature sensors. The operating principle of thermocouple temperature sensor is that the two ends of the contact surface of two kinds of incompatible metals produce a weak and weak voltage when the temperature is inconsistent, and the temperature is measured by expanding the electric, which is not necessary to measure the high temperature. RTD Temperature Sensors ...
|
|
Precautions for using pressure sensors
The pressure sensor is an instrument that can accept pressure signals, and it is widely used in railway transportation, intelligent buildings and other occupations.
First, prevent solder slag from ...
|
|
Essentials for the selection of ifm controllers
1. The ifm controller has a control function
Another important reference feature for the purchase of ifm controllers is the ability to control movements and other applications. Fulfillment of these functional requirements requires I/O, as well as a strong processor and the ability to prioritize missions.
Programmable Drum Switches (PDS...
|
|
The access point for load cell dashboards – ifm
Key points of maintenance of electronic crane scales, automobile weighbridges, electronic forklift scales, unique effect electronic scales, and the outer dial of Dongguan electronic weighbridge weight sensor:
The detection and analysis of problems in the application of load cells, and the common problems of the weighing appearance of automation technology have been in the end of the system software.
|
|
Contact
working hours
