Which verification regulations apply to electromagnetic flow meters? Does the LGF-PA66 need periodic verification for fiscal metering?

In China, electromagnetic flow meters are verified under JJG 1033, the national verification regulation for electromagnetic flow meters. Meters used for fiscal (trade settlement) purposes fall under mandatory verification performed by legal metrology institutes; internal process metering can follow the calibration route with a CNAS calibration certificate.

Key points in practice:

• Verification interval: fiscal meters are typically verified every 2 years (subject to local metrology authority requirements); process meters are recommended for calibration every 2–3 years.
• Method: wet verification on a standard rig (gravimetric or master-meter method). Sizes up to DN300 are sent to the lab; larger bores can be field-verified against a master meter.
• Pass criteria: judged against the meter's stated accuracy class — the LGF-PA66 leaves the factory verified at the ±0.5%（DN50-100） class, passing if indication errors stay within ±0.5%（DN50-100）.

Every LGF-PA66 is individually flow-calibrated before shipment, with a certificate listing indication error at each flow point — usable as the baseline record for initial verification. For fiscal metering points, specify “fiscal use + accuracy class” at order time so the factory certificate aligns with later mandatory verification. At points equipped with an EC32 RTU, the platform retains the full data history, keeping any gap during off-site verification traceable.

For more details, please visit our product pages or contact our technical team.