How to calibrate and verify 4-20mA output signal of LGF electromagnetic flowmeter?

4-20mA signal calibration for LGF electromagnetic flowmeters is essential for maintaining ±0.5% accuracy. Begin with proper test equipment including digital multimeter, precision resistor decade box, and 24V DC power supply.

• Zero point verification: At zero flow, output should be 4mA±0.02mA
• Full scale calibration: At maximum flow rate, output should be 20mA±0.02mA
• Linearity check: Test at 25%, 50%, and 75% flow points
• Load capacity test: Verify signal stability under maximum load resistance

If deviations exceed specification, use configuration software or keypad operations for zero and span adjustments. Ecolor Technology's LGF series supports field calibration across DN10-DN2000 diameter range, ensuring reliable measurement performance in industrial applications.