Troubleshooting & Error Messages; Problem; Probable Cause; Things To Try - Seametrics AG3000p Instructions Manual

TROUBLESHOOTING & ERROR MESSAGES
Troubleshooting

Problem

Blank Display
Flow rate reading fluctuates
excessively when flow is
unchanging
Flow Rate appears correct but
pulse/ frequency output is low,
erratic or absent
Flow Rate appears correct
but pulse/frequency output is
erratic and/or too high

Error Messages

Under certain conditions an error message may be displayed.
Message
INIT
EMPTY PIPE
LO in battery icon
BATT END
LOW VOLT
COIL FAIL
COMM FAIL
OVER RANGE
Seametrics • 253.872.0284
Probable Causes
Faulty wiring from power source to
meter
Backup battery has not been plugged in
Dead backup battery
Excessively turbulent or unsteady flow
due to partially closed valves or other
flow obstructions
Pipe not full
Pulsing flow due to combining multiple
upstream flow sources
Insufficient mixing of upstream
chemicals
Low fluid conductivity < 20 µS/cm
Noisy electrical environment
Defective or noisy AC switching power
supply
Wiring incorrect
External device input impedance too low Use sourcing rather than sinking interface
Cable too long
Electrical noise sources interfering with
pulse frequency signal
Wrong type of cable
Grounding problem
Description
Initialization is occurring during power up.
Fluid is not detected between the sensing electrodes.
Battery is getting low, replace soon. Meter still functions.
Battery is very low (approx. 6.1V). Totalizer stops updating.
Incoming external power is very low and backup battery is dead
or not connected
Coil current too high or too low (short or open).
Communication between transmitter and sensor board fails.
Rate exceeds number of digits that can be displayed. Adjust units.

Things to try...

Check for incorrect wiring. Measure voltage with
DMM where red and black wires connect to
terminal block TB1 on back side of display. Verify
correct polarity and confirm that voltage is steady
and between 9Vdc and 32Vdc
Plug in the battery
Replace battery
Eliminate or minimize causes of flow disturbances
or increase meter damping
Provide back pressure or other means to ensure
pipe is filled
Move connection point further upstream
Move chemical injection downstream from meter
Replace with different type of meter
Improve grounding at meter and nearby potentially
noisy electrical equipment. Increase distance
between meter and electrical noise sources.
Replace power supply
Compare wiring with appropriate wiring
recommendations
connection
Reduce interface pull-up resistance
Isolate, remove or reduce noise sources. Move
meter control cable away from noise sources.
Increase pulse damp setting (PDAMP)
Use only twisted pair cable and ensure both signal
wires are on same twisted pair
Improve or try different grounding method
Page 22
AG3000p INSTRUCTIONS
Notes
Loop output = 22.8mA
Above 6.4V, OK appears in icon
Loop output = 4mA
Loop output = 4mA
Loop output = 22.8mA
Loop output = 22.8mA
Loop output = 4mA
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