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Q How to troubleshoot no output or large fluctuation?
Check power supply, wiring, probe blockage or damage, grounding and shielding, electromagnetic interference, and vibration. Recalibrate zero and span if necessary.
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Q What are the standard power supply and load range?
Standard power supply: 24VDC (12–36VDC).
For 2‑wire 4–20mA transmitters, typical maximum load ≤500Ω. 4‑wire instruments have almost no load limitation.
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Q How to clean probes in fouling-prone media?
Wipe antennas with a soft cloth, water, or alcohol. Clean submersible probes with soft brushes. Install cleaning or purging devices for heavy fouling. Non-contact measurement is recommended for severe scaling conditions.
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Q What should be checked during daily maintenance?
Check for loose or damaged wiring, stable 24VDC power supply, clean probes and diaphragms, normal display and alarms, and intact grounding and explosion‑proof seals.
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Q How often should transmitters be calibrated?
Calibrate every 6–12 months under normal conditions. For high‑precision, harsh, or critical processes, calibrate every 3 months. The process includes warm‑up, zero calibration, full‑scale calibration, and error verification.
