S-76-9-E
7. TROUBLESHOOTING
PROBLEM
POSSIBLE CAUSE
HANDLING
. Counter will not count
. Flowrate low.
. Open valves progressively.
. Pump pressure or head
pressure low.
. Taking pressure loss of the
entire tubing system into
account, select a proper pump
pressure or head pressure.
3. Power source voltage is out
of specification.
3. Supply to 4 VDC power to the
pulse generator.
4. Oval rotors are jammed by
foreign matter, interrupting the
flow.
4. Disassemble the meter body
by referring to the meter body
disassembly and inspection
procedure in Section 6. Wash
clean the rotors and related
components.
5. The oval rotors are installed
the wrong way.
5. Install the rotors correctly,
referring to the meter body
assembly and inspection
procedure in Sec. 6..
. Liquid leaks.
. Incomplete seal of the tubing.
. Tighten up the tube connections
or replace gaskets.
. Incomplete front cover seal
of the meter body.
2. Check front cover fitting bolts
for tightness and replace O-ring
with new one.
3. Counts while the
valve remains closed.
. Liquid leaks from valves or
tube connections.
. Inspect valves and tube
connections for condition.
. Air builds up somewhere
between the valve and meter;
pulsating pump pressure
causes a rocking motion of
the rotors.
. Let the air escape. Provide a
check valve and accumulator.
4. Accumulated total too high.
. Rocking motion of rotors by
pulsating flow.
. Provide a check valve and
accumulator.
2. Influenced by external
magnetic fields.
(The flowsensor picks up
external magnetic fields from a
motor, generator, etc.)
. Shield from external magnetic
fields.
3. Air entrapped.
3. Provide an air vent.
5. Accumulated total too
low.
1. Influenced by external
magnetic fields.
. Shield from external magnetic
fields.
