the gear flow meter installation verification guide

I. Mechanical Installation Verification

Gear Meshing Inspection‌

Manually rotate gears to confirm smooth rotation without jamming or abnormal noise[1][2][6][8].

Troubleshooting‌: If binding occurs, disassemble and clean chamber debris (e.g., graphite residue or particles)[3][5][7].

Magnet Orientation & Seal Alignment‌

Magnet-equipped gear must be directionally installed per model specifications (typically holes downward/shaft upward)[2][5][8];

Cover plate indentation must align with magnetic gear orientation, with seal ring undistorted[5][6][7].

Piping and Flow Direction Compliance‌

Sensor arrow direction must strictly match actual fluid flow[9];

Verify straight pipe sections (upstream ≥10 pipe diameters, downstream ≥5 pipe diameters)[9][10].

II. Electrical & Signal Testing

Pulse Signal Output Verification‌

Connect digital display, use low-flow fluid (e.g., 0.015 L/min) or air puff to rotate gears[4][6];

Pass Criteria‌: Display values change synchronously with gear rotation[2][5][6].

Static Zero Calibration‌

Close valves to stop flow: Instantaneous reading should approach zero (deviation ≤±0.1% of full scale)[10];

Troubleshooting‌: Persistent non-zero values require recalibration or gear binding check[10].

III. System Integration Testing

Pressure Leak Test‌

Pressurize system and inspect joints/cover for leaks (apply soap solution to detect bubbles)[7][10];

Leak Response‌: Replace aged seals or repair shaft scratches[3][7].

Flow Linearity Test‌

Compare readings with reference equipment at low/medium/high flow points (e.g., 20%/50%/100% range);

Acceptance‌: Full-range error ≤±0.5% (≤±0.3% for critical processes)[10].

IV. Environmental & Operational Review

Pipe Fill‌: Lines must be liquid-full; install air eliminators if bubbles exist[9][10];

Vibration Control‌: Isolate from pumps/valves; use damping pads in high-vibration zones[9];

Temperature Management‌: Provide sunshades/insulation in high-temp environments to prevent thermal deformation[3].

Critical Notes‌:

Incorrect magnet polarity causes signal failure[5][8];

Errors >±0.5% require gear clearance calibration or part replacement[6][10].

(Translation maintains original technical hierarchies, warning symbols ⚠️, and citation markers [ ] for traceability)