1、 Operation steps and core points
Installation preparation
Location selection: Avoid areas directly impacted by materials (such as below the feed inlet), and prioritize areas with smooth material flow. For medium temperature equipment, it is necessary to ensure that the installation environment temperature is within the range of -40 ℃ to 200 ℃ to prevent high temperature from causing performance degradation of piezoelectric crystals.
Angle adjustment: When installed vertically, the fork surface should be aligned with the direction of liquid flow to reduce material hanging; When installing horizontally, it is recommended to tilt at an angle of 15-20 degrees to avoid material accumulation.
Sealing treatment: If used for overpressure or underpressure containers, it is necessary to confirm the temperature resistance of the sealing material (such as fluororubber O-ring) and apply high-temperature resistant sealant to prevent leakage.
Wiring and Debugging
Power connection: Choose AC220V or DC24V power supply according to the model to ensure power stability. Explosion proof equipment must follow relevant wiring specifications, such as using explosion-proof cable connectors.
Parameter settings:
Sensitivity adjustment: Adjust by rotating the sensitivity adjustment knob (usually located inside the casing). Due to the high temperature of the medium, it is recommended to adjust the sensitivity of medium temperature equipment to a medium low level (such as 3-5 levels) to avoid frequency drift of fork body vibration caused by high temperature.
Delay time setting: Set the delay time (adjustable from 1-20 seconds) according to the material characteristics to prevent short fluctuations from triggering false alarms. For example, viscous liquids can be appropriately delayed for more than 10 seconds.
Self check function: Some models (such as Ring-11) support self check. After pressing the test button, the indicator light should turn from green to red and then back to green to confirm that the circuit is normal.
Testing and Running
Empty Warehouse Calibration: In the absence of materials, press the "Empty Warehouse" button until the indicator light stays on, completing the empty warehouse calibration.
Full Warehouse Calibration: Slowly inject materials to the alarm position, press the "Full Warehouse" button until the indicator light stays on, and confirm that the alarm function is normal.
Dynamic testing: Simulate actual working conditions (such as temperature fluctuations and material impacts), observe whether the indicator lights switch stably, and ensure equipment reliability.
2、 Core advantages of medium temperature tuning fork level controller
Outstanding high temperature resistance performance
Wide temperature range: Supports medium temperatures ranging from -40 ℃ to 200 ℃, suitable for scenarios such as high-temperature steam, hot melt adhesives, and high-temperature oils, far exceeding the applicable range of ordinary models (-20 ℃ to 80 ℃).
Material optimization: The fork body is made of high-temperature resistant alloy (such as 316L stainless steel), and the piezoelectric crystal is made of high-temperature lead zirconate titanate (PZT-8) to ensure stable vibration at high temperatures.
Strong anti-interference ability
Free from medium characteristics: based on the principle of vibration frequency change, free from foam, bubbles, viscosity, vibration and other interference, suitable for complex working conditions. For example, in the production of detergent containing foam, the liquid level can still be accurately detected.
Self diagnostic function: Real time monitoring of fork body vibration frequency. If the frequency is abnormal due to corrosion or wear, an alarm will be automatically triggered to avoid misoperation.
Easy installation and maintenance
Compact structure: The fork body length is only 38-40mm, suitable for narrow spaces such as conduits and small storage tanks, reducing installation footprint.
Maintenance free design: No moving parts, no need for regular lubrication or cleaning, reducing maintenance costs. For example, in the food industry, downtime for cleaning can be reduced and production efficiency can be improved.
High reliability output
Multiple signal outputs: Supports relay, two-wire, and Namur signal outputs, compatible with different control systems. For example, relay output can directly drive alarm lights or pumps, and two-wire output is suitable for long-distance transmission (≤ 5KM).
High protection level: reaching IP66/IP67 standards, dustproof and waterproof, suitable for outdoor or humid environments (such as sewage treatment plants).
Complete security certification
Explosion proof certification: Through intrinsic safety and explosion-proof certification, it can be used in flammable and explosive places (such as gasoline and liquefied gas storage tanks).
Food grade certification: Some models (such as Ring-11 food grade) have a surface finish Ra<0.5 μ m, which meets FDA standards and can be directly used in the production of food such as milk and alcohol.
3、 Recommended application scenarios
High temperature liquid detection: such as liquid level control in hot oil pipelines and steam boilers.
Measurement of viscous media: Level alarms for materials such as syrup, asphalt, and resin.
High pressure environment: such as liquid level monitoring of LNG storage tanks and high-pressure reactors.
Food and pharmaceutical industry: Process links that require meeting hygiene standards and high temperatures (such as sterilization pot liquid level control).