Badger Meter 3-A Sanitary - Manual (Page 16)

TROUBLESHOOTING GUIDE
Trouble Possible Cause Remedy
Meter indicates higher than actual
flow rate
• Cavitation
• Debris on rotor support
• Build up of foreign material on
meter bore
• Gas in liquid
• Increase back pressure
• Clean meter
• Clean meter
• Install gas eliminator ahead of meter
Meter indicates lower than actual
flow rate
• Debris on rotor
• Worn bearing
• Viscosity higher than calibrated • Clean meter and add filter
• Install new repair kit
• Recalibrate monitor
Erratic system indication, meter
alone works well (remote monitor
application only)
Ground loop in shielding
Ground shield one place only Look for
internal electronic instrument ground
Reroute cables away from electrical noise
Indicator shows flow when shut off
Mechanical vibration causes rotor to
oscillate without turning
Isolate meter
No flow indication, full or partial
open position
Fluid shock, full flow into dry meter or
impact caused bearing separation or
broken rotor shaft
Rebuild meter with repair kit and
recalibrate monitor Move to location
where meter is full on startup or add
downstream flow control valve
Erratic indication at low flow, good
indication at high flow
Rotor has foreign material wrapped
around it
Clean meter and add filter
No flow indication Faulty pickup Replace pickup
System works perfect, except
indicates lower flow over entire range Bypass flow, leak
Repair or replace bypass valves or faulty
solenoid valves
Meter indicating high flow, upstream
piping at meter smaller than meter
bore
Fluid jet impingement on rotor Change piping
Opposite effects of above Viscosity lower than calibrated
Change temperature, change fluid or
recalibrate meter
Turbine Flow Meter, FloClean Sanitary Flow Meter
Page 16 November 2013