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• Conductivity is less than 20 µS/cm.
• Electronic component failure.
• 4-20 mA is not scaled same as Loop
device.
• Loop device is not scaled same as
Magmeter.
• Range Jumper not placed correctly.
• Defective Magmeter
• Magmeter installed too close to
upstream obstruction.
• Magmeter electrodes are coated with
solids.
• Magmeter electrodes exposed to air
bubbles/pockets.
• Electrical noise is interfering with the
measurement.
• New sensor, metal surface not
properly conditioned.
• Output is not 0 when fl ow is stopped.
• Frequency or Current
output is erratic.
• Output is 22.1 mA.
• Electrode not adequately conditioned.
• Pipe is empty, Magmeter is not in fl uid.
• Electrical noise is interfering with the
measurement.
• Defective Magmeter
Symptom
Possible Cause Possible Solution
• Frequency output is inoperative
• Loop output is inperative.
• Move the Magmeter upstream at least
10 pipe diameters from obstruction.
• Clean the electrodes with soft cloth.
Do not use abrasives.
• Eliminate air bubbles in the pipe.
• Remove the Magmeter and reinstall
with the fl ow direction arrow on the
sensor body pointed DOWNSTREAM.
• Modify grounding as required
to protect the Magmeter from
interference.
• Soak sensor overnight in fl uid.
10.2 Troubleshooting
• Soak sensor overnight in fl uid.
• Confi gure pipe so electrodes are
always in fl uid.
• Modify grounding as required
to protect the Magmeter from
interference.
• Set low fl ow cutoff higher.
• Return to factory for service.
• Respan Loop device to match
Magmeter.
• Set Range Jumper correctly.
• Return to factory for service.
• FMG-3000 is wrong model.
• Blue jumper not in correct position.
• Wiring is not correct.
• Frequency input to other
manufacturer's fl ow instrument does
not have pull-up resistor.
• Frequency model is FMG-3001 and
FMG-3101 series.
• Place blue jumper correctly. (Sec. 5
pg. 9)
• Check wiring, make corrections.
• Install 10kΩ resistor. Sec 8.1, pg. 6)
• Unsuitable application for Magmeter.
• Return to factory for service.
• 4-20 mA output is incorrect.
10. Maintenance
The FMG-3000 series Magmeter requires very little maintenance. There are no user-serviceable components in the Magmeter.
• If the fl uid contains deposits and solids that may coat the electrodes, a regular cleaning schedule is recommended.
• Do not use abrasive materials on the metal electrodes. Clean with soft cloth and mild detergent only.
• Use a cotton swab and mild detergent to remove deposits on the metal electrodes at the tip of the sensor.
10.1. Environmental Recommendations:
• When used properly, this product presents no inherent danger to the environment.
• Please follow local ordinance when disposing of this or any product with electronic components.
Troubleshooting with the RED and BLUE lights
The FMG-3000 uses two colored LEDs to indicate the status of the instrument.
They are located at the top of the magmeter, inside the clear plastic cap.
No Lights: The power is off or the sensor is not connected
Solid Blue (D7): The power is on but there is no fl ow in the pipe.
Blinking Blue (D7): Normal operation, blink rate is proportional to the fl ow rate.
Alternating Red-Blue: Empty pipe indication (electrodes are not wet.)
Blinking Red (D6): System errors (Electrical noise interference)
Solid Red (D6): Instrument error (defective electronics component)
1
2
3
4
JP2
D7
D6
Flow Flow