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10. Maintenance
The FMG-3000 series Magmeter requires very little maintenance. There are no user-serviceable components in the Magmeter.
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If the fl uid contains deposits and solids that may coat the electrodes, a regular cleaning schedule is recommended.
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Do not use abrasive materials on the metal electrodes. Clean with soft cloth and mild detergent only.
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Use a cotton swab and mild detergent to remove deposits on the metal electrodes at the tip of the sensor.
10.1.
Environmental Recommendations:
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When used properly, this product presents no inherent danger to the environment.
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Please follow local ordinance when disposing of this or any product with electronic components.
10.2 Troubleshooting
Symptom
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Frequency or Current
output is erratic.
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Output is not 0 when fl ow is stopped.
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4-20 mA output is incorrect.
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Frequency output is inoperative
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Loop output is inperative.
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Output is 22.1 mA.
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:
Solid Blue (D7):
Blinking Blue (D7):
Alternating Red-Blue:
Blinking Red (D6):
Solid Red (D6):
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Magmeter installed too close to
upstream obstruction.
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Magmeter electrodes are coated with
solids.
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Magmeter electrodes exposed to air
bubbles/pockets.
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Electrical noise is interfering with the
measurement.
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New sensor, metal surface not
properly conditioned.
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Electrode not adequately conditioned.
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Pipe is empty, Magmeter is not in fl uid.
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Electrical noise is interfering with the
measurement.
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Defective Magmeter
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4-20 mA is not scaled same as Loop
device.
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Loop device is not scaled same as
Magmeter.
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Range Jumper not placed correctly.
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Defective Magmeter
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FMG-3000 is wrong model.
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Blue jumper not in correct position.
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Wiring is not correct.
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Frequency input to other
manufacturer's fl ow instrument does
not have pull-up resistor.
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Conductivity is less than 20 µS/cm.
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Electronic component failure.
The power is off or the sensor is not connected
The power is on but there is no fl ow in the pipe.
Normal operation, blink rate is proportional to the fl ow rate.
Empty pipe indication (electrodes are not wet.)
System errors (Electrical noise interference)
Instrument error (defective electronics component)
Possible Cause
Possible Solution
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Move the Magmeter upstream at least
10 pipe diameters from obstruction.
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Clean the electrodes with soft cloth.
Do not use abrasives.
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Eliminate air bubbles in the pipe.
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Remove the Magmeter and reinstall
with the fl ow direction arrow on the
sensor body pointed DOWNSTREAM.
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Modify grounding as required
to protect the Magmeter from
interference.
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Soak sensor overnight in fl uid.
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Soak sensor overnight in fl uid.
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Confi gure pipe so electrodes are
always in fl uid.
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Modify grounding as required
to protect the Magmeter from
interference.
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Set low fl ow cutoff higher.
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Return to factory for service.
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Respan Loop device to match
Magmeter.
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Set Range Jumper correctly.
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Return to factory for service.
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Frequency model is FMG-3001 and
FMG-3101 series.
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Place blue jumper correctly. (Sec. 5
pg. 9)
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Check wiring, make corrections.
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Install 10kΩ resistor. Sec 8.1, pg. 6)
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Unsuitable application for Magmeter.
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Return to factory for service.
4
3
2
1
D6
Flow
D7
Flow
11
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