Radio frequency admittance level switches are widely used in petroleum, chemical, metallurgy, electric power, medicine, food, paper, building materials and other industrial fields. The product uses high-frequency technology to generate a low-power radio frequency signal on the probe by the electronic circuit. The probe is a sensitive component and feeds back the signal change caused by the level dielectric constant to the electronic circuit; because these changes include capacity and conductivity Therefore, the electronic circuit processes the integrated change signal of capacitive reactance and impedance; after processing, the output state of the relay is changed. It is an improved radio frequency admittance measurement technology based on the original capacitance measurement and represents a new level of level measurement today.Quick calibration method of radio frequency admittance level switch:1. Connect the probe and meter according to the correct method, and connect to the power supply. Pay attention to whether the power supply voltage is correct. Warm up for 3 minutes. 2. The adjustable range of the three potentiometers on the instrument panel is from 8 o’clock to 4 o’clock, and they cannot be rotated 360 degrees, otherwise the potentiometer will be damaged. The green light represents the normal state, and the red light represents the alarm state. 3. Potentiometer F—represents fine adjustment (abbreviated as F): Potentiometer C—represents coarse adjustment (abbreviated as C); potentiometer DLY—represents delayed output (abbreviated as DLY): delay time 0-30 seconds). Set or close arbitrarily. 4. In general, place the FALLSAFE insert on the L position and turn off the delay (rotate counterclockwise to the end). 5. Put F at the 12 o’clock position, adjust C, and hit the critical point around 10— 2 o’clock (first turn the green light clockwise to the red light, and then turn the red light counterclockwise to the green light position ), this location is called the boundary point. If it is already red after power-on, adjust C counterclockwise. When the red light turns to green, it is the critical point. 6. Adjust F clockwise again to find a more critical point. The green light status should be displayed at this time. 7, (a) If it is applied to a powder ash system, just rotate F counterclockwise about 20 degrees from the critical point. (B) If it is applied to a coal conveying system, it is sufficient to rotate C clockwise about 10 degrees from the critical point
Post time: 21-09-21