A lightning strike recently caused a 230 million RMB power generation unit to fail instantly—this was not a movie effect, but a real incident at a thermal power plant in Guangdong in 2023. In Dongguan alone, there were seven incidents of lightning strikes on power generation equipment, with a single loss of up to 820,000 […]
What is Grounding Resistance and When Should It Be Below 4Ω? Read More »
When there is a significant deviation between the actual valve position and the DCS (Distributed Control System) display (i.e., the actual valve opening differs considerably from the DCS screen reading), process control can be affected. To resolve this, a systematic approach must be taken to investigate signal transmission, positioner calibration, actuator functionality, and DCS settings.
Troubleshooting Discrepancies Between Valve Position and DCS Display Read More »
The key to effective interference suppression for radar level transmitters is a systematic approach: first, physical obstruction removal; then, precise echo masking; and finally, coordinated parameter optimization. Follow these actionable steps to adapt to typical chemical plant conditions. Preparation (Essential Steps) Empty Tank / Low Liquid Level Verification: Interference learning must be performed when the
Best Settings for Radar Level Transmitter Interference Suppression Read More »
1. Introduction A Differential Pressure Flow Meter (DP Flow Meter) measures flow rate by detecting the pressure difference generated by a primary element installed in a pipeline. The flow rate is calculated based on: Measured differential pressure Known fluid properties Geometric dimensions of the primary element and pipe A typical DP flow measurement system consists
In any industrial automation system, inaccurate pressure measurement can compromise safety, product quality, and process stability. A pressure transmitter is often referred to as the “nerve ending” of a control system. If its zero point drifts, every downstream control action — from PID regulation to safety interlocks — may operate on incorrect data. Zero calibration
Why Zero Calibration Is Critical for Pressure Transmitters Read More »
Thermocouples are among the most widely used temperature sensors in industrial measurement systems. From power plant boilers to gasification furnaces and petrochemical reactors, thermocouples provide reliable temperature monitoring in environments ranging from –200°C to above 1800°C. Understanding how thermocouples work, how to select the correct type, and how material degradation affects long-term accuracy is essential
Thermocouple: Principle, Selection Guide, Failure Mechanism and Industrial Applications Read More »
In field maintenance, engineers often encounter this situation: The zero point cannot be adjusted back to 4 mA The full-scale output cannot reach 20 mA Mid-range readings show serious deviation Many technicians keep trying to adjust zero and span repeatedly. However, once the deviation exceeds the transmitter’s internal adjustment range, calibration will no longer solve
Recommended Continuous Operating Temperature Range Note: The values below are general recommended continuous temperature ranges.Actual performance depends on compound formulation, media compatibility, pressure, and service conditions. Material Abbreviation Continuous Temperature Range Typical Applications Nitrile Rubber NBR –40°C to +100°C Hydraulic oil, fuel systems, general industrial oils Hydrogenated Nitrile HNBR –40°C to +150°C Automotive systems, high-temperature
O-Ring Material Temperature Guide (International Industrial Reference) Read More »
In industrial sites, pressure-related issues occur almost every day: Unstable pressure readings Fluctuating or drifting signals Frequent instrument damage Complaints about poor accuracy shortly after commissioning After investigation, the conclusion is often the same: The instrument itself is not defective — the problem started with incorrect selection. This issue is especially common when choosing between
Top 10 Causes and a Proven Field Troubleshooting Workflow If you are an instrument technician, electrician, or automation engineer, you have probably experienced this moment: The PLC screen suddenly turns red.The AI channel alarms “Signal Loss”.The trend line drops straight to zero. The operator looks at you and says: “Hey, the signal is gone again.”
4–20 mA Signal Lost? Don’t Rush to Replace the Transmitter Read More »
