11
•
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
10k
Ω
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
