The liquid level transmitter is suitable for continuous detection of various liquids under harsh conditions such as high temperature and high pressure, strong corrosion, easy crystallization, and easy clogging. It is suitable for measuring the water level of sewage, acid and alkali solutions, and boilers. The whole machine does not have any moving or elastic parts , Impact resistance, easy installation, high reliability, high precision, can replace the traditional floating ball type, input type, differential pressure type and other liquid level transmitters in various occasions.
The core component adopts advanced radio frequency capacitance detection circuit, which is converted into standard electrical signal (generally 4 ~ 20mA) through 16-bit single-chip microcomputer after accurate temperature compensation and linear correction. Optional HART, CANBUS, 485 communication protocol for system configuration. All series of liquid level transmitters have a self-calibration function, users can use two buttons to automatically calibrate the "zero point" and "range" to meet the different requirements of various complex places.
Installation and commissioning Cable and rod-type liquid level transmitters have a variety of installation and fixing methods, liquid level sensors to adapt to different site conditions, when the site can not provide M20 Ã— 1.5 internal threads or flanges and other process facilities, you can choose Three installation methods such as wall-mounted, horizontal tube-framed and vertical tube-framed can be selected, which will make you handy when installing on site. When the liquid level transmitter measures the medium with high fluidity, in order to prevent the sensor from swinging violently, The user can choose the weight accessory to stabilize the sensor. When adding the weight, you must put the weight object in the bottom of the container to avoid pulling the sensing wire. When the scene environment is harsh, the user should choose the sensor protective cover To protect the sensor from being damaged by foreign objects or affecting the accuracy of measurement. When using a rod-type level transmitter, if it is not a metal container, you need to connect the outer shell of the transmitter to the bottom of the container with a wire, otherwise the measurement will be inaccurate.
If the liquid level sensor needs on-site adjustment, the following methods can be adopted: B: Debugging method using intelligent circuit: On-site zero adjustment ---- When the liquid level is at the lowest position, simultaneously hold down the "Z" key and "S" Press the button at the same time after 8 seconds, and then press the "Z" button once, the output current is automatically adjusted to 4mA. Full adjustment on site ---- When the liquid level is at the highest position, simultaneously hold down the "Z" key and the "S" key for 8 seconds and release at the same time, then press the "S" key once again, the output current is automatically adjusted To 20mA. B: Using analog circuit debugging method: when the liquid level is at the lower limit, slowly rotate the "Z" potentiometer with a screwdriver, observe the ammeter reading is close to 4mA, when the liquid level is at the upper limit, slowly rotate the "S" potentiometer with a screwdriver, observe The ammeter reading is close to 20mA. Repeat this for more than 2-3 times until the zero point and range are accurate 4mA and 20mA respectively. After adjustment, the cover of the transmitter should be tightened.
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