Fill-Rite TS AA Mechanical Precision Meter - Manual (Page 17)

1 . 17
Troubleshooting the Flow Meter
Prior to opening or disassembly of any flow meter, all
internal pressure must be relieved and all liquid must be
drained. This must be done in accordance with applica-
ble company and local codes & ordinances.
Make sure that all necessary safety precautions have
been taken, including proper clothing, personal safety
equipment and fire safety equipment if required.
No Flow

Blocked strainer basket. Clean the basket.
 Faulty or non-functioning pump. Repair pump.
 Valve stuck in closed position. Check and repair valves.
 Flow meter ‘frozen’ due to build-up of chemical salts (or
frozen water) inside the measuring chamber. Clean the
flow meter (see D & F on page 1.12), and inspect for
damage.
 Meter jammed on a particle, that has passed through a
damaged strainer basket. Remove particle (see D & F on
page 1.12) and replace rotors if necessary. Replace
strainer basket, see page 2.1).
Reduced Flow Rate

Strainer basket partially blocked. Clean the basket (see
page 2.1).
 Pump not functioning correctly. Repair pump.
 Valve stuck in partially closed position. Check valves and
repair.
 Meter rotors (oval gears) partially ‘salted’ with chemical
deposits, slowing the movement. Clean the meter (see D
& F on page 1.12).
Product Flows, but the register does not record

Check packing gland pinion (11D) & face gear (11E).
 If disengaged, re-assemble the drive shaft assembly
correctly.
 If worn, replace pinion & face gear as a set.
 If the calibrator drive shaft turns, the problem is either in
the calibrator assembly (19) or in the mechanical register.
 Remove the calibrator assembly (see H on page 1.13).
Insert the drive shat and turn by hand. If it turns
smoothly without binding, the problem is in the register.
 Refer to Veeder-Root register manual & parts list.
 If the calibrator drive shaft does not turn, the problem is
either in the packing gland or in reduction gears on the
bearing plate.
 Check the connections between the pulser and the elec-
tronic register.
 Check pulser output. Replace pulser (or SCL) if needed.
 If product is flowing, and the flow meter is generating a
pulse signal, the problem is in the electronic register.
Please refer to the manual for the electronic register.
Product Flows, register does not record correctly
If the error factor is constant, the flow meter is fine. The
likely cause is either:
 Incorrect K Factor in the electronic register. Re-calibrate
the meter and correct the K Factor.
 A constant problem with air getting into the system. Re-
view system design and control valves.
If the error is random, the likely cause is either:
 Poor cable connections (insulation not trimmed, or stray
strands getting close to incorrect contacts). This can be
either on the scaler board or where pulse signal is con-
nected to the register. Inspect and correct connections
as necessary.
 Valve leaking, allowing a portion of the system to drain.
Check & repair valves.
 An intermittent problem with air in the system, combined
with inadequate air elimination. Review system design
and control valves.
 Interference from other electrical equipment nearby., pos-
sibly combined with sub-standard cables.
Broken Rotors (Oval Gears = #2)

System started on air/vapors.
Replace rotors and inspect meter case (#1) for damage;
repair/replace as necessary. Slowly fill the system with
liquid before starting the pump. Gradually increase flow
rate to full capacity.
 Rotors jammed on a foreign particle (welding slag, part
broken off other equipment, etc.).
Replace rotors and inspect meter case (#1) for damage;
repair/replace as necessary. Add a strainer in front of the
flow meter. Slowly fill the system with liquid before start-
ing the pump. Gradually increase flow rate to full capaci-
ty.
Breaking Teeth on Rotors (Oval Gears = #2)
Breaking Teeth/shaft on Reduction Gears (#4D/F/G
These are signs of hydraulic shock conditions in the sys-
tem. Common sources:
 Starting or stopping flow too rapidly. Replace damaged
components and correct operational practices.
 Pump by-pass not adjusted properly. Re-adjust as nec-
essary.
 Open connection to another portion of the system with
higher flow rates. Close connection prior to use.
Leakage from End Covers
The seals (and possibly end covers) have been damaged
due to excessive pressure. There are two possible sources:
 Starting or stopping flow too rapidly. Replace damaged
components and correct operational practices.
 The flow meter is in a system, where it can be isolated
between two valves. Add a Thermal Relief Valve to bleed
off excess pressure when the temperature rises.