Rotor Replacement; Signal Troubleshooting; Sensor Replacement - Seametrics IP800 Series Instructions Manual

OPERATION AND MAINTENANCE
Caution: Never remove the u-clip retainer when the pipe is under pressure. Always remove
pressure from the pipe before attempting to remove the meter. Removal under pressure
may result in damage or serious injury.

Rotor Replacement

It is unusual for a rotor to require replacement due to
damage sustained in normal service. More commonly, the
meter is dropped while it is out of the pipe. Another reason
for rotor replacement is shaft wear after long service.
Rotors are easily field-replaced.
To install a rotor, follow these steps:
1. Unscrew the threaded bearing housings to expose
the shaft ends. If bearings are being replaced, back
them completely out.
2. Remove the rotor. Put the new rotor in its place.
3. Thread in one bearing housing part way, then the
other. Take care to start the end of the shaft into
the bearing hole before tightening further.
4. Screw in bearing housings until they bottom.
Note: Do not use excessive force.
5. Check for free spin. Blowing lightly on the rotor
should result in it spinning rapidly and coasting to a
smooth stop.

Signal Troubleshooting

The flow sensor has only one moving part, the rotor. If
this is turning properly and there is no signal, the magnetic
sensor is not operating properly. To check the signal, apply
12 Vdc power to the red (+) and black (-) leads. Set a
multimeter to voltage reading. Put the positive multimeter
lead on the red wire and the negative lead on the white
wire. Slowly turn the rotor. Voltage reading should swing
between -12 Volts and 0 Volts as the rotor turns. If it
does not, the solid-state magnetic sensor is not working
properly. Checking for continuity is not a useful test of
these sensors.
Seametrics • 253.872.0284

Sensor Replacement

It is very unusual for a sensor to require replacement
in normal use. The primary cause of sensor failure is
overvoltage (inadvertent connection of high voltage, for
example) or incorrect polarity on hookup. The sensor is
replaced by removing the strain relief, then threading out
the sensor retainer plug. Remove the entire sensor capsule
by pulling on the cable. The new sensor capsule can then
be installed. Replace the retainer plug, and then replace
and tighten the strain relief.
1. Loosen and unthread
Strain Relief.
2. Remove the Sensor
Capsule by pulling on
the cable.
3. Remove the Sensor
Capsule by pulling on
the cable.
4. Reverse the process to
replace.
Page 11
IP800-SERIES INSTRUCTIONS
seametrics.com